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-rw-r--r--sql/item.cc5
-rw-r--r--sql/item_cmpfunc.cc15
-rw-r--r--sql/item_func.cc2
-rw-r--r--sql/item_subselect.cc81
-rw-r--r--sql/lock.cc33
-rw-r--r--sql/log_event.cc9
-rw-r--r--sql/my_decimal.h10
-rw-r--r--sql/mysql_priv.h24
-rw-r--r--sql/set_var.cc5
-rw-r--r--sql/slave.cc3
-rw-r--r--sql/sp.cc9
-rw-r--r--sql/sp_head.cc57
-rw-r--r--sql/sp_head.h12
-rw-r--r--sql/sql_base.cc424
-rw-r--r--sql/sql_cache.cc18
-rw-r--r--sql/sql_class.cc2
-rw-r--r--sql/sql_class.h14
-rw-r--r--sql/sql_handler.cc25
-rw-r--r--sql/sql_insert.cc612
-rw-r--r--sql/sql_lex.cc329
-rw-r--r--sql/sql_lex.h91
-rw-r--r--sql/sql_parse.cc116
-rw-r--r--sql/sql_prepare.cc28
-rw-r--r--sql/sql_table.cc160
-rw-r--r--sql/sql_trigger.cc10
-rw-r--r--sql/sql_view.cc14
-rw-r--r--sql/sql_yacc.yy204
-rw-r--r--sql/table.h40
28 files changed, 1668 insertions, 684 deletions
diff --git a/sql/item.cc b/sql/item.cc
index 30486e7559a..651ab826484 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -3503,7 +3503,8 @@ Item_field::fix_outer_field(THD *thd, Field **from_field, Item **reference)
prev_subselect_item->const_item_cache= 0;
set_field(*from_field);
if (!last_checked_context->select_lex->having_fix_field &&
- select->group_list.elements)
+ select->group_list.elements &&
+ (place == SELECT_LIST || place == IN_HAVING))
{
Item_outer_ref *rf;
/*
@@ -4622,7 +4623,6 @@ inline uint char_val(char X)
Item_hex_string::Item_hex_string(const char *str, uint str_length)
{
- name=(char*) str-2; // Lex makes this start with 0x
max_length=(str_length+1)/2;
char *ptr=(char*) sql_alloc(max_length+1);
if (!ptr)
@@ -4733,7 +4733,6 @@ Item_bin_string::Item_bin_string(const char *str, uint str_length)
uchar bits= 0;
uint power= 1;
- name= (char*) str - 2;
max_length= (str_length + 7) >> 3;
char *ptr= (char*) sql_alloc(max_length + 1);
if (!ptr)
diff --git a/sql/item_cmpfunc.cc b/sql/item_cmpfunc.cc
index 9a251312aca..3a79940b571 100644
--- a/sql/item_cmpfunc.cc
+++ b/sql/item_cmpfunc.cc
@@ -633,7 +633,13 @@ Arg_comparator::can_compare_as_dates(Item *a, Item *b, ulonglong *const_value)
if (cmp_type != CMP_DATE_DFLT)
{
- if (cmp_type != CMP_DATE_WITH_DATE && str_arg->const_item())
+ /*
+ Do not cache GET_USER_VAR() function as its const_item() may return TRUE
+ for the current thread but it still may change during the execution.
+ */
+ if (cmp_type != CMP_DATE_WITH_DATE && str_arg->const_item() &&
+ (str_arg->type() != Item::FUNC_ITEM ||
+ ((Item_func*)str_arg)->functype() != Item_func::GUSERVAR_FUNC))
{
THD *thd= current_thd;
ulonglong value;
@@ -780,7 +786,12 @@ get_datetime_value(THD *thd, Item ***item_arg, Item **cache_arg,
MYSQL_TYPE_DATE ? MYSQL_TIMESTAMP_DATE : MYSQL_TIMESTAMP_DATETIME;
value= get_date_from_str(thd, str, t_type, warn_item->name, &error);
}
- if (item->const_item() && cache_arg)
+ /*
+ Do not cache GET_USER_VAR() function as its const_item() may return TRUE
+ for the current thread but it still may change during the execution.
+ */
+ if (item->const_item() && cache_arg && (item->type() != Item::FUNC_ITEM ||
+ ((Item_func*)item)->functype() != Item_func::GUSERVAR_FUNC))
{
Item_cache_int *cache= new Item_cache_int();
/* Mark the cache as non-const to prevent re-caching. */
diff --git a/sql/item_func.cc b/sql/item_func.cc
index c0a9647e382..1bd41cf87a4 100644
--- a/sql/item_func.cc
+++ b/sql/item_func.cc
@@ -4450,7 +4450,7 @@ int get_var_with_binlog(THD *thd, enum_sql_command sql_command,
List<set_var_base> tmp_var_list;
LEX *sav_lex= thd->lex, lex_tmp;
thd->lex= &lex_tmp;
- lex_start(thd, NULL, 0);
+ lex_start(thd);
tmp_var_list.push_back(new set_var_user(new Item_func_set_user_var(name,
new Item_null())));
/* Create the variable */
diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc
index 48b82e3cde6..3f4ba16a18d 100644
--- a/sql/item_subselect.cc
+++ b/sql/item_subselect.cc
@@ -775,6 +775,11 @@ bool Item_in_subselect::val_bool()
if (exec())
{
reset();
+ /*
+ Must mark the IN predicate as NULL so as to make sure an enclosing NOT
+ predicate will return FALSE. See the comments in
+ subselect_uniquesubquery_engine::copy_ref_key for further details.
+ */
null_value= 1;
return 0;
}
@@ -1936,10 +1941,38 @@ int subselect_uniquesubquery_engine::scan_table()
DESCRIPTION
Copy ref key and check for null parts in it.
+ Depending on the nullability and conversion problems this function
+ recognizes and processes the following states :
+ 1. Partial match on top level. This means IN has a value of FALSE
+ regardless of the data in the subquery table.
+ Detected by finding a NULL in the left IN operand of a top level
+ expression.
+ We may actually skip reading the subquery, so return TRUE to skip
+ the table scan in subselect_uniquesubquery_engine::exec and make
+ the value of the IN predicate a NULL (that is equal to FALSE on
+ top level).
+ 2. No exact match when IN is nested inside another predicate.
+ Detected by finding a NULL in the left IN operand when IN is not
+ a top level predicate.
+ We cannot have an exact match. But we must proceed further with a
+ table scan to find out if it's a partial match (and IN has a value
+ of NULL) or no match (and IN has a value of FALSE).
+ So we return FALSE to continue with the scan and see if there are
+ any record that would constitute a partial match (as we cannot
+ determine that from the index).
+ 3. Error converting the left IN operand to the column type of the
+ right IN operand. This counts as no match (and IN has the value of
+ FALSE). We mark the subquery table cursor as having no more rows
+ (to ensure that the processing that follows will not find a match)
+ and return FALSE, so IN is not treated as returning NULL.
+
RETURN
- FALSE - ok, index lookup key without keys copied.
- TRUE - an error occured while copying the key
+ FALSE - The value of the IN predicate is not known. Proceed to find the
+ value of the IN predicate using the determined values of
+ null_keypart and table->status.
+ TRUE - IN predicate has a value of NULL. Stop the processing right there
+ and return NULL to the outer predicates.
*/
bool subselect_uniquesubquery_engine::copy_ref_key()
@@ -1959,13 +1992,37 @@ bool subselect_uniquesubquery_engine::copy_ref_key()
function.
*/
null_keypart= (*copy)->null_key;
- bool top_level= ((Item_in_subselect *) item)->is_top_level_item();
- if (null_keypart && !top_level)
- break;
- if ((tab->ref.key_err) & 1 || (null_keypart && top_level))
+ if (null_keypart)
+ {
+ bool top_level= ((Item_in_subselect *) item)->is_top_level_item();
+ if (top_level)
+ {
+ /* Partial match on top level */
+ DBUG_RETURN(1);
+ }
+ else
+ {
+ /* No exact match when IN is nested inside another predicate */
+ break;
+ }
+ }
+
+ /*
+ Check if the error is equal to STORE_KEY_FATAL. This is not expressed
+ using the store_key::store_key_result enum because ref.key_err is a
+ boolean and we want to detect both TRUE and STORE_KEY_FATAL from the
+ space of the union of the values of [TRUE, FALSE] and
+ store_key::store_key_result.
+ TODO: fix the variable an return types.
+ */
+ if (tab->ref.key_err & 1)
{
+ /*
+ Error converting the left IN operand to the column type of the right
+ IN operand.
+ */
tab->table->status= STATUS_NOT_FOUND;
- DBUG_RETURN(1);
+ break;
}
}
DBUG_RETURN(0);
@@ -2008,10 +2065,20 @@ int subselect_uniquesubquery_engine::exec()
int error;
TABLE *table= tab->table;
empty_result_set= TRUE;
+ table->status= 0;
/* TODO: change to use of 'full_scan' here? */
if (copy_ref_key())
DBUG_RETURN(1);
+ if (table->status)
+ {
+ /*
+ We know that there will be no rows even if we scan.
+ Can be set in copy_ref_key.
+ */
+ ((Item_in_subselect *) item)->value= 0;
+ DBUG_RETURN(0);
+ }
if (null_keypart)
DBUG_RETURN(scan_table());
diff --git a/sql/lock.cc b/sql/lock.cc
index 233d12d9cc4..9298b33b4d2 100644
--- a/sql/lock.cc
+++ b/sql/lock.cc
@@ -853,7 +853,6 @@ int lock_table_name(THD *thd, TABLE_LIST *table_list)
TABLE *table;
char key[MAX_DBKEY_LENGTH];
char *db= table_list->db;
- int table_in_key_offset;
uint key_length;
HASH_SEARCH_STATE state;
DBUG_ENTER("lock_table_name");
@@ -861,10 +860,8 @@ int lock_table_name(THD *thd, TABLE_LIST *table_list)
safe_mutex_assert_owner(&LOCK_open);
- table_in_key_offset= strmov(key, db) - key + 1;
- key_length= (uint)(strmov(key + table_in_key_offset, table_list->table_name)
- - key) + 1;
-
+ key_length= (uint)(strmov(strmov(key, db) + 1, table_list->table_name) -
+ key) + 1;
/* Only insert the table if we haven't insert it already */
for (table=(TABLE*) hash_first(&open_cache, (byte*)key, key_length, &state);
@@ -873,29 +870,11 @@ int lock_table_name(THD *thd, TABLE_LIST *table_list)
if (table->in_use == thd)
DBUG_RETURN(0);
- /*
- Create a table entry with the right key and with an old refresh version
- Note that we must use my_malloc() here as this is freed by the table
- cache
- */
- if (!(table= (TABLE*) my_malloc(sizeof(*table)+key_length,
- MYF(MY_WME | MY_ZEROFILL))))
- DBUG_RETURN(-1);
- table->s= &table->share_not_to_be_used;
- memcpy((table->s->table_cache_key= (char*) (table+1)), key, key_length);
- table->s->db= table->s->table_cache_key;
- table->s->table_name= table->s->table_cache_key + table_in_key_offset;
- table->s->key_length=key_length;
- table->in_use=thd;
- table->locked_by_name=1;
- table_list->table=table;
-
- if (my_hash_insert(&open_cache, (byte*) table))
- {
- my_free((gptr) table,MYF(0));
+ if (!(table= table_cache_insert_placeholder(thd, key, key_length)))
DBUG_RETURN(-1);
- }
-
+
+ table_list->table= table;
+
/* Return 1 if table is in use */
DBUG_RETURN(test(remove_table_from_cache(thd, db, table_list->table_name,
RTFC_NO_FLAG)));
diff --git a/sql/log_event.cc b/sql/log_event.cc
index 8bb63e72bde..173ca6232ee 100644
--- a/sql/log_event.cc
+++ b/sql/log_event.cc
@@ -1879,7 +1879,8 @@ int Query_log_event::exec_event(struct st_relay_log_info* rli,
thd->variables.collation_database= thd->db_charset;
/* Execute the query (note that we bypass dispatch_command()) */
- mysql_parse(thd, thd->query, thd->query_length);
+ const char* found_semicolon= NULL;
+ mysql_parse(thd, thd->query, thd->query_length, &found_semicolon);
}
else
@@ -2987,10 +2988,12 @@ int Load_log_event::exec_event(NET* net, struct st_relay_log_info* rli,
thd->query_error= 0;
clear_all_errors(thd, rli);
/*
- Usually mysql_init_query() is called by mysql_parse(), but we need it here
+ Usually lex_start() is called by mysql_parse(), but we need it here
as the present method does not call mysql_parse().
*/
- mysql_init_query(thd, 0, 0);
+ lex_start(thd);
+ mysql_reset_thd_for_next_command(thd);
+
if (!use_rli_only_for_errors)
{
/* Saved for InnoDB, see comment in Query_log_event::exec_event() */
diff --git a/sql/my_decimal.h b/sql/my_decimal.h
index 9558b00f0cf..0affa07557e 100644
--- a/sql/my_decimal.h
+++ b/sql/my_decimal.h
@@ -36,13 +36,17 @@ C_MODE_END
/* maximum length of buffer in our big digits (uint32) */
#define DECIMAL_BUFF_LENGTH 9
+
+/* the number of digits that my_decimal can possibly contain */
+#define DECIMAL_MAX_POSSIBLE_PRECISION (DECIMAL_BUFF_LENGTH * 9)
+
/*
maximum guaranteed precision of number in decimal digits (number of our
digits * number of decimal digits in one our big digit - number of decimal
- digits in one our big digit decreased on 1 (because we always put decimal
+ digits in one our big digit decreased by 1 (because we always put decimal
point on the border of our big digits))
*/
-#define DECIMAL_MAX_PRECISION ((DECIMAL_BUFF_LENGTH * 9) - 8*2)
+#define DECIMAL_MAX_PRECISION (DECIMAL_MAX_POSSIBLE_PRECISION - 8*2)
#define DECIMAL_MAX_SCALE 30
#define DECIMAL_NOT_SPECIFIED 31
@@ -50,7 +54,7 @@ C_MODE_END
maximum length of string representation (number of maximum decimal
digits + 1 position for sign + 1 position for decimal point)
*/
-#define DECIMAL_MAX_STR_LENGTH (DECIMAL_MAX_PRECISION + 2)
+#define DECIMAL_MAX_STR_LENGTH (DECIMAL_MAX_POSSIBLE_PRECISION + 2)
/*
maximum size of packet length
*/
diff --git a/sql/mysql_priv.h b/sql/mysql_priv.h
index c0dfcc1f19e..f03ef487154 100644
--- a/sql/mysql_priv.h
+++ b/sql/mysql_priv.h
@@ -640,6 +640,8 @@ struct Query_cache_query_flags
ulong sql_mode;
ulong max_sort_length;
ulong group_concat_max_len;
+ ulong default_week_format;
+ ulong div_precision_increment;
MY_LOCALE *lc_time_names;
};
#define QUERY_CACHE_FLAGS_SIZE sizeof(Query_cache_query_flags)
@@ -674,6 +676,8 @@ struct Query_cache_query_flags
#define query_cache_invalidate_by_MyISAM_filename_ref NULL
#endif /*HAVE_QUERY_CACHE*/
+uint build_table_path(char *buff, size_t bufflen, const char *db,
+ const char *table, const char *ext);
bool mysql_create_db(THD *thd, char *db, HA_CREATE_INFO *create, bool silent);
bool mysql_alter_db(THD *thd, const char *db, HA_CREATE_INFO *create);
bool mysql_rm_db(THD *thd,char *db,bool if_exists, bool silent);
@@ -694,13 +698,15 @@ bool do_rename(THD *thd, TABLE_LIST *ren_table, char *new_db,
bool skip_error);
bool mysql_change_db(THD *thd, const LEX_STRING *new_db_name,
bool force_switch);
-void mysql_parse(THD *thd,char *inBuf,uint length);
+
+void mysql_parse(THD *thd, const char *inBuf, uint length,
+ const char ** semicolon);
+
bool mysql_test_parse_for_slave(THD *thd,char *inBuf,uint length);
bool is_update_query(enum enum_sql_command command);
bool alloc_query(THD *thd, const char *packet, uint packet_length);
void mysql_init_select(LEX *lex);
void mysql_reset_thd_for_next_command(THD *thd);
-void mysql_init_query(THD *thd, uchar *buf, uint length);
bool mysql_new_select(LEX *lex, bool move_down);
void create_select_for_variable(const char *var_name);
void mysql_init_multi_delete(LEX *lex);
@@ -854,12 +860,14 @@ bool mysql_create_or_drop_trigger(THD *thd, TABLE_LIST *tables, bool create);
TABLE *open_ltable(THD *thd, TABLE_LIST *table_list, thr_lock_type update);
TABLE *open_table(THD *thd, TABLE_LIST *table_list, MEM_ROOT* mem,
bool *refresh, uint flags);
-bool reopen_name_locked_table(THD* thd, TABLE_LIST* table);
+bool reopen_name_locked_table(THD* thd, TABLE_LIST* table_list, bool link_in);
+TABLE *table_cache_insert_placeholder(THD *thd, const char *key,
+ uint key_length);
+bool table_cache_has_open_placeholder(THD *thd, const char *db,
+ const char *table_name);
TABLE *find_locked_table(THD *thd, const char *db,const char *table_name);
bool reopen_table(TABLE *table,bool locked);
bool reopen_tables(THD *thd,bool get_locks,bool in_refresh);
-void close_old_data_files(THD *thd, TABLE *table, bool abort_locks,
- bool send_refresh);
bool close_data_tables(THD *thd,const char *db, const char *table_name);
bool wait_for_tables(THD *thd);
bool table_is_used(TABLE *table, bool wait_for_name_lock);
@@ -1015,6 +1023,8 @@ void add_join_natural(TABLE_LIST *a,TABLE_LIST *b,List<String> *using_fields,
SELECT_LEX *lex);
bool add_proc_to_list(THD *thd, Item *item);
TABLE *unlink_open_table(THD *thd,TABLE *list,TABLE *find);
+void drop_open_table(THD *thd, TABLE *table, const char *db_name,
+ const char *table_name);
void update_non_unique_table_error(TABLE_LIST *update,
const char *operation,
TABLE_LIST *duplicate);
@@ -1267,7 +1277,7 @@ extern double log_01[32];
extern ulonglong log_10_int[20];
extern ulonglong keybuff_size;
extern ulonglong thd_startup_options;
-extern ulong refresh_version,flush_version, thread_id;
+extern ulong flush_version, thread_id;
extern ulong binlog_cache_use, binlog_cache_disk_use;
extern ulong aborted_threads,aborted_connects;
extern ulong delayed_insert_timeout;
@@ -1441,7 +1451,7 @@ MYSQL_LOCK *mysql_lock_tables(THD *thd, TABLE **table, uint count,
#define MYSQL_LOCK_IGNORE_GLOBAL_READ_LOCK 0x0001
#define MYSQL_LOCK_IGNORE_FLUSH 0x0002
#define MYSQL_LOCK_NOTIFY_IF_NEED_REOPEN 0x0004
-#define MYSQL_OPEN_IGNORE_LOCKED_TABLES 0x0008
+#define MYSQL_OPEN_TEMPORARY_ONLY 0x0008
void mysql_unlock_tables(THD *thd, MYSQL_LOCK *sql_lock);
void mysql_unlock_read_tables(THD *thd, MYSQL_LOCK *sql_lock);
diff --git a/sql/set_var.cc b/sql/set_var.cc
index 44ad15c3c4e..8808327ce0a 100644
--- a/sql/set_var.cc
+++ b/sql/set_var.cc
@@ -1204,6 +1204,11 @@ static bool sys_update_ftb_syntax(THD *thd, set_var * var)
{
strmake(ft_boolean_syntax, var->value->str_value.c_ptr(),
sizeof(ft_boolean_syntax)-1);
+
+#ifdef HAVE_QUERY_CACHE
+ query_cache.flush();
+#endif /* HAVE_QUERY_CACHE */
+
return 0;
}
diff --git a/sql/slave.cc b/sql/slave.cc
index 97615165803..84f409d7f34 100644
--- a/sql/slave.cc
+++ b/sql/slave.cc
@@ -1517,6 +1517,7 @@ static int create_table_from_dump(THD* thd, MYSQL *mysql, const char* db,
handler *file;
ulonglong save_options;
NET *net= &mysql->net;
+ const char *found_semicolon= NULL;
DBUG_ENTER("create_table_from_dump");
packet_len= my_net_read(net); // read create table statement
@@ -1567,7 +1568,7 @@ static int create_table_from_dump(THD* thd, MYSQL *mysql, const char* db,
save_db_length= thd->db_length;
DBUG_ASSERT(db != 0);
thd->reset_db((char*)db, strlen(db));
- mysql_parse(thd, thd->query, packet_len); // run create table
+ mysql_parse(thd, thd->query, packet_len, &found_semicolon); // run create table
thd->db = save_db; // leave things the way the were before
thd->db_length= save_db_length;
thd->options = save_options;
diff --git a/sql/sp.cc b/sql/sp.cc
index 4fc9ea1f602..976bb1911b2 100644
--- a/sql/sp.cc
+++ b/sql/sp.cc
@@ -434,10 +434,15 @@ db_load_routine(THD *thd, int type, sp_name *name, sp_head **sphp,
if ((ret= sp_use_new_db(thd, name->m_db, &old_db, 1, &dbchanged)))
goto end;
- lex_start(thd, (uchar*)defstr.c_ptr(), defstr.length());
+ {
+ Lex_input_stream lip(thd, defstr.c_ptr(), defstr.length());
+ thd->m_lip= &lip;
+ lex_start(thd);
+ ret= MYSQLparse(thd);
+ }
thd->spcont= 0;
- if (MYSQLparse(thd) || thd->is_fatal_error || newlex.sphead == NULL)
+ if (ret || thd->is_fatal_error || newlex.sphead == NULL)
{
sp_head *sp= newlex.sphead;
diff --git a/sql/sp_head.cc b/sql/sp_head.cc
index 338b2eb84bb..835d8bf038f 100644
--- a/sql/sp_head.cc
+++ b/sql/sp_head.cc
@@ -512,6 +512,8 @@ sp_head::init_sp_name(THD *thd, sp_name *spname)
m_qname.length= spname->m_qname.length;
m_qname.str= strmake_root(thd->mem_root, spname->m_qname.str,
m_qname.length);
+
+ DBUG_VOID_RETURN;
}
@@ -519,9 +521,10 @@ void
sp_head::init_strings(THD *thd, LEX *lex)
{
DBUG_ENTER("sp_head::init_strings");
- uchar *endp; /* Used to trim the end */
+ const char *endp; /* Used to trim the end */
/* During parsing, we must use thd->mem_root */
MEM_ROOT *root= thd->mem_root;
+ Lex_input_stream *lip=thd->m_lip;
if (m_param_begin && m_param_end)
{
@@ -531,17 +534,17 @@ sp_head::init_strings(THD *thd, LEX *lex)
}
/* If ptr has overrun end_of_query then end_of_query is the end */
- endp= (lex->ptr > lex->end_of_query ? lex->end_of_query : lex->ptr);
+ endp= (lip->ptr > lip->end_of_query ? lip->end_of_query : lip->ptr);
/*
Trim "garbage" at the end. This is sometimes needed with the
"/ * ! VERSION... * /" wrapper in dump files.
*/
- endp= skip_rear_comments(m_body_begin, endp);
+ endp= skip_rear_comments((char*) m_body_begin, (char*) endp);
m_body.length= endp - m_body_begin;
- m_body.str= strmake_root(root, (char *)m_body_begin, m_body.length);
- m_defstr.length= endp - lex->buf;
- m_defstr.str= strmake_root(root, (char *)lex->buf, m_defstr.length);
+ m_body.str= strmake_root(root, m_body_begin, m_body.length);
+ m_defstr.length= endp - lip->buf;
+ m_defstr.str= strmake_root(root, lip->buf, m_defstr.length);
DBUG_VOID_RETURN;
}
@@ -1756,24 +1759,13 @@ sp_head::reset_lex(THD *thd)
DBUG_ENTER("sp_head::reset_lex");
LEX *sublex;
LEX *oldlex= thd->lex;
- my_lex_states org_next_state= oldlex->next_state;
(void)m_lex.push_front(oldlex);
thd->lex= sublex= new st_lex;
- /* Reset most stuff. The length arguments doesn't matter here. */
- lex_start(thd, oldlex->buf, (ulong) (oldlex->end_of_query - oldlex->ptr));
+ /* Reset most stuff. */
+ lex_start(thd);
- /*
- next_state is normally the same (0), but it happens that we swap lex in
- "mid-sentence", so we must restore it.
- */
- sublex->next_state= org_next_state;
- /* We must reset ptr and end_of_query again */
- sublex->ptr= oldlex->ptr;
- sublex->end_of_query= oldlex->end_of_query;
- sublex->tok_start= oldlex->tok_start;
- sublex->yylineno= oldlex->yylineno;
/* And keep the SP stuff too */
sublex->sphead= oldlex->sphead;
sublex->spcont= oldlex->spcont;
@@ -1806,9 +1798,6 @@ sp_head::restore_lex(THD *thd)
if (! oldlex)
return; // Nothing to restore
- // Update some state in the old one first
- oldlex->ptr= sublex->ptr;
- oldlex->next_state= sublex->next_state;
oldlex->trg_table_fields.push_back(&sublex->trg_table_fields);
/*
@@ -2995,10 +2984,20 @@ sp_instr_hreturn::print(String *str)
uint
sp_instr_hreturn::opt_mark(sp_head *sp, List<sp_instr> *leads)
{
- if (m_dest)
- return sp_instr_jump::opt_mark(sp, leads);
-
marked= 1;
+
+ if (m_dest)
+ {
+ /*
+ This is an EXIT handler; next instruction step is in m_dest.
+ */
+ return m_dest;
+ }
+
+ /*
+ This is a CONTINUE handler; next instruction step will come from
+ the handler stack and not from opt_mark.
+ */
return UINT_MAX;
}
@@ -3491,6 +3490,14 @@ sp_head::merge_table_list(THD *thd, TABLE_LIST *table, LEX *lex_for_tmp_check)
tname[tlen]= '\0';
/*
+ Upgrade the lock type because this table list will be used
+ only in pre-locked mode, in which DELAYED inserts are always
+ converted to normal inserts.
+ */
+ if (table->lock_type == TL_WRITE_DELAYED)
+ table->lock_type= TL_WRITE;
+
+ /*
We ignore alias when we check if table was already marked as temporary
(and therefore should not be prelocked). Otherwise we will erroneously
treat table with same name but with different alias as non-temporary.
diff --git a/sql/sp_head.h b/sql/sp_head.h
index cce400d6a14..ed99885ae9a 100644
--- a/sql/sp_head.h
+++ b/sql/sp_head.h
@@ -125,7 +125,7 @@ public:
create_field m_return_field_def; /* This is used for FUNCTIONs only. */
- uchar *m_tmp_query; // Temporary pointer to sub query string
+ const char *m_tmp_query; // Temporary pointer to sub query string
uint m_old_cmq; // Old CLIENT_MULTI_QUERIES value
st_sp_chistics *m_chistics;
ulong m_sql_mode; // For SHOW CREATE and execution
@@ -174,7 +174,9 @@ public:
*/
HASH m_sroutines;
// Pointers set during parsing
- uchar *m_param_begin, *m_param_end, *m_body_begin;
+ const char *m_param_begin;
+ const char *m_param_end;
+ const char *m_body_begin;
/*
Security context for stored routine which should be run under
@@ -971,6 +973,12 @@ public:
virtual void print(String *str);
+ /* This instruction will not be short cut optimized. */
+ virtual uint opt_shortcut_jump(sp_head *sp, sp_instr *start)
+ {
+ return m_ip;
+ }
+
virtual uint opt_mark(sp_head *sp, List<sp_instr> *leads);
private:
diff --git a/sql/sql_base.cc b/sql/sql_base.cc
index 59532b9fe96..0b5922d8737 100644
--- a/sql/sql_base.cc
+++ b/sql/sql_base.cc
@@ -94,6 +94,8 @@ static bool open_new_frm(THD *thd, const char *path, const char *alias,
uint db_stat, uint prgflag,
uint ha_open_flags, TABLE *outparam,
TABLE_LIST *table_desc, MEM_ROOT *mem_root);
+static void close_old_data_files(THD *thd, TABLE *table, bool morph_locks,
+ bool send_refresh);
extern "C" byte *table_cache_key(const byte *record,uint *length,
my_bool not_used __attribute__((unused)))
@@ -374,7 +376,21 @@ bool close_cached_tables(THD *thd, bool if_wait_for_refresh,
for (uint idx=0 ; idx < open_cache.records ; idx++)
{
TABLE *table=(TABLE*) hash_element(&open_cache,idx);
- if ((table->s->version) < refresh_version && table->db_stat)
+ /*
+ Note that we wait here only for tables which are actually open, and
+ not for placeholders with TABLE::open_placeholder set. Waiting for
+ latter will cause deadlock in the following scenario, for example:
+
+ conn1: lock table t1 write;
+ conn2: lock table t2 write;
+ conn1: flush tables;
+ conn2: flush tables;
+
+ It also does not make sense to wait for those of placeholders that
+ are employed by CREATE TABLE as in this case table simply does not
+ exist yet.
+ */
+ if (table->needs_reopen_or_name_lock() && table->db_stat)
{
found=1;
DBUG_PRINT("signal", ("Waiting for COND_refresh"));
@@ -616,10 +632,10 @@ bool close_thread_table(THD *thd, TABLE **table_ptr)
TABLE *table= *table_ptr;
DBUG_ENTER("close_thread_table");
DBUG_ASSERT(table->key_read == 0);
- DBUG_ASSERT(table->file->inited == handler::NONE);
+ DBUG_ASSERT(!table->file || table->file->inited == handler::NONE);
*table_ptr=table->next;
- if (table->s->version != refresh_version ||
+ if (table->needs_reopen_or_name_lock() ||
thd->version != refresh_version || !table->db_stat)
{
VOID(hash_delete(&open_cache,(byte*) table));
@@ -627,6 +643,12 @@ bool close_thread_table(THD *thd, TABLE **table_ptr)
}
else
{
+ /*
+ Open placeholders have TABLE::db_stat set to 0, so they should be
+ handled by the first alternative.
+ */
+ DBUG_ASSERT(!table->open_placeholder);
+
if (table->s->flush_version != flush_version)
{
table->s->flush_version= flush_version;
@@ -1114,6 +1136,43 @@ TABLE *unlink_open_table(THD *thd, TABLE *list, TABLE *find)
}
+/**
+ @brief Auxiliary routine which closes and drops open table.
+
+ @param thd Thread handle
+ @param table TABLE object for table to be dropped
+ @param db_name Name of database for this table
+ @param table_name Name of this table
+
+ @note This routine assumes that table to be closed is open only
+ by calling thread so we needn't wait until other threads
+ will close the table. Also unless called under implicit or
+ explicit LOCK TABLES mode it assumes that table to be
+ dropped is already unlocked. In the former case it will
+ also remove lock on the table. But one should not rely on
+ this behaviour as it may change in future.
+*/
+
+void drop_open_table(THD *thd, TABLE *table, const char *db_name,
+ const char *table_name)
+{
+ if (table->s->tmp_table)
+ close_temporary_table(thd, db_name, table_name);
+ else
+ {
+ enum db_type table_type= table->s->db_type;
+ VOID(pthread_mutex_lock(&LOCK_open));
+ /*
+ unlink_open_table() also tells threads waiting for refresh or close
+ that something has happened.
+ */
+ thd->open_tables= unlink_open_table(thd, thd->open_tables, table);
+ quick_rm_table(table_type, db_name, table_name);
+ VOID(pthread_mutex_unlock(&LOCK_open));
+ }
+}
+
+
/*
When we call the following function we must have a lock on
LOCK_open ; This lock will be unlocked on return.
@@ -1152,6 +1211,11 @@ void wait_for_refresh(THD *thd)
table_list TABLE_LIST object for table to be open, TABLE_LIST::table
member should point to TABLE object which was used for
name-locking.
+ link_in TRUE - if TABLE object for table to be opened should be
+ linked into THD::open_tables list.
+ FALSE - placeholder used for name-locking is already in
+ this list so we only need to preserve TABLE::next
+ pointer.
NOTE
This function assumes that its caller already acquired LOCK_open mutex.
@@ -1161,7 +1225,7 @@ void wait_for_refresh(THD *thd)
TRUE - Error
*/
-bool reopen_name_locked_table(THD* thd, TABLE_LIST* table_list)
+bool reopen_name_locked_table(THD* thd, TABLE_LIST* table_list, bool link_in)
{
TABLE *table= table_list->table;
TABLE_SHARE *share;
@@ -1199,12 +1263,33 @@ bool reopen_name_locked_table(THD* thd, TABLE_LIST* table_list)
share= table->s;
share->db= share->table_cache_key;
share->key_length=key_length;
+ /*
+ We want to prevent other connections from opening this table until end
+ of statement as it is likely that modifications of table's metadata are
+ not yet finished (for example CREATE TRIGGER have to change .TRG file,
+ or we might want to drop table if CREATE TABLE ... SELECT fails).
+ This also allows us to assume that no other connection will sneak in
+ before we will get table-level lock on this table.
+ */
share->version=0;
share->flush_version=0;
table->in_use = thd;
check_unused();
- table->next = thd->open_tables;
- thd->open_tables = table;
+
+ if (link_in)
+ {
+ table->next= thd->open_tables;
+ thd->open_tables= table;
+ }
+ else
+ {
+ /*
+ TABLE object should be already in THD::open_tables list so we just
+ need to set TABLE::next correctly.
+ */
+ table->next= orig_table.next;
+ }
+
table->tablenr=thd->current_tablenr++;
table->used_fields=0;
table->const_table=0;
@@ -1216,6 +1301,167 @@ bool reopen_name_locked_table(THD* thd, TABLE_LIST* table_list)
}
+/**
+ @brief Create and insert into table cache placeholder for table
+ which will prevent its opening (or creation) (a.k.a lock
+ table name).
+
+ @param thd Thread context
+ @param key Table cache key for name to be locked
+ @param key_length Table cache key length
+
+ @return Pointer to TABLE object used for name locking or 0 in
+ case of failure.
+*/
+
+TABLE *table_cache_insert_placeholder(THD *thd, const char *key,
+ uint key_length)
+{
+ TABLE *table;
+ char *key_buff;
+ DBUG_ENTER("table_cache_insert_placeholder");
+
+ safe_mutex_assert_owner(&LOCK_open);
+
+ /*
+ Create a table entry with the right key and with an old refresh version
+ Note that we must use my_multi_malloc() here as this is freed by the
+ table cache
+ */
+ if (!my_multi_malloc(MYF(MY_WME | MY_ZEROFILL),
+ &table, sizeof(*table),
+ &key_buff, key_length,
+ NULL))
+ DBUG_RETURN(NULL);
+
+ table->s= &table->share_not_to_be_used;
+ memcpy(key_buff, key, key_length);
+ table->s->table_cache_key= key_buff;
+ table->s->db= table->s->table_cache_key;
+ table->s->table_name= table->s->table_cache_key + strlen(table->s->db) + 1;
+ table->s->key_length= key_length;
+ table->in_use= thd;
+ table->locked_by_name= 1;
+
+ if (my_hash_insert(&open_cache, (byte*)table))
+ {
+ my_free((gptr) table, MYF(0));
+ DBUG_RETURN(NULL);
+ }
+
+ DBUG_RETURN(table);
+}
+
+
+/**
+ @brief Check if table cache contains an open placeholder for the
+ table and if this placeholder was created by another thread.
+
+ @param thd Thread context
+ @param db Name of database for table in question
+ @param table_name Table name
+
+ @note The presence of open placeholder indicates that either some
+ other thread is trying to create table in question and obtained
+ an exclusive name-lock on it or that this table already exists
+ and is being flushed at the moment.
+
+ @note One should acquire LOCK_open mutex before calling this function.
+
+ @note This function is a hack which was introduced in 5.0 only to
+ minimize code changes. It doesn't present in 5.1.
+
+ @retval TRUE Table cache contains open placeholder for the table
+ which was created by some other thread.
+ @retval FALSE Otherwise.
+*/
+
+bool table_cache_has_open_placeholder(THD *thd, const char *db,
+ const char *table_name)
+{
+ char key[MAX_DBKEY_LENGTH];
+ uint key_length;
+ HASH_SEARCH_STATE state;
+ TABLE *search;
+ DBUG_ENTER("table_cache_has_open_placeholder");
+
+ safe_mutex_assert_owner(&LOCK_open);
+
+ key_length=(uint) (strmov(strmov(key,db)+1,table_name)-key)+1;
+ for (search= (TABLE*) hash_first(&open_cache, (byte*) key, key_length,
+ &state);
+ search ;
+ search= (TABLE*) hash_next(&open_cache, (byte*) key, key_length,
+ &state))
+ {
+ if (search->in_use == thd)
+ continue;
+ if (search->open_placeholder)
+ DBUG_RETURN(1);
+ }
+ DBUG_RETURN(0);
+}
+
+
+/**
+ @brief Check that table exists on disk or in some storage engine.
+
+ @param thd Thread context
+ @param table Table list element
+ @param exists[out] Out parameter which is set to TRUE if table
+ exists and to FALSE otherwise.
+
+ @note This function assumes that caller owns LOCK_open mutex.
+ It also assumes that the fact that there are no name-locks
+ on the table was checked beforehand.
+
+ @note If there is no .FRM file for the table but it exists in one
+ of engines (e.g. it was created on another node of NDB cluster)
+ this function will fetch and create proper .FRM file for it.
+
+ @retval TRUE Some error occured
+ @retval FALSE No error. 'exists' out parameter set accordingly.
+*/
+
+bool check_if_table_exists(THD *thd, TABLE_LIST *table, bool *exists)
+{
+ char path[FN_REFLEN];
+ int rc;
+ DBUG_ENTER("check_if_table_exists");
+
+ safe_mutex_assert_owner(&LOCK_open);
+
+ *exists= TRUE;
+
+ build_table_path(path, sizeof(path), table->db, table->table_name, reg_ext);
+
+ if (!access(path, F_OK))
+ DBUG_RETURN(FALSE);
+
+ /* .FRM file doesn't exist. Check if some engine can provide it. */
+
+ rc= ha_create_table_from_engine(thd, table->db, table->table_name);
+
+ if (rc < 0)
+ {
+ /* Table does not exists in engines as well. */
+ *exists= FALSE;
+ DBUG_RETURN(FALSE);
+ }
+ else if (!rc)
+ {
+ /* Table exists in some engine and .FRM for it was created. */
+ DBUG_RETURN(FALSE);
+ }
+ else /* (rc > 0) */
+ {
+ my_printf_error(ER_UNKNOWN_ERROR, "Failed to open '%-.64s', error while "
+ "unpacking from engine", MYF(0), table->table_name);
+ DBUG_RETURN(TRUE);
+ }
+}
+
+
/*
Open a table.
@@ -1231,12 +1477,17 @@ bool reopen_name_locked_table(THD* thd, TABLE_LIST* table_list)
MYSQL_LOCK_IGNORE_FLUSH - Open table even if
someone has done a flush or namelock on it.
No version number checking is done.
- MYSQL_OPEN_IGNORE_LOCKED_TABLES - Open table
- ignoring set of locked tables and prelocked mode.
+ MYSQL_OPEN_TEMPORARY_ONLY - Open only temporary
+ table not the base table or view.
IMPLEMENTATION
Uses a cache of open tables to find a table not in use.
+ If table list element for the table to be opened has "create" flag
+ set and table does not exist, this function will automatically insert
+ a placeholder for exclusive name lock into the open tables cache and
+ will return the TABLE instance that corresponds to this placeholder.
+
RETURN
NULL Open failed. If refresh is set then one should close
all other tables and retry the open.
@@ -1305,6 +1556,12 @@ TABLE *open_table(THD *thd, TABLE_LIST *table_list, MEM_ROOT *mem_root,
}
}
+ if (flags & MYSQL_OPEN_TEMPORARY_ONLY)
+ {
+ my_error(ER_NO_SUCH_TABLE, MYF(0), table_list->db, table_list->table_name);
+ DBUG_RETURN(0);
+ }
+
/*
The table is not temporary - if we're in pre-locked or LOCK TABLES
mode, let's try to find the requested table in the list of pre-opened
@@ -1312,8 +1569,7 @@ TABLE *open_table(THD *thd, TABLE_LIST *table_list, MEM_ROOT *mem_root,
open not pre-opened tables in pre-locked/LOCK TABLES mode.
TODO: move this block into a separate function.
*/
- if (!(flags & MYSQL_OPEN_IGNORE_LOCKED_TABLES) &&
- (thd->locked_tables || thd->prelocked_mode))
+ if (thd->locked_tables || thd->prelocked_mode)
{ // Using table locks
TABLE *best_table= 0;
int best_distance= INT_MIN;
@@ -1495,7 +1751,7 @@ TABLE *open_table(THD *thd, TABLE_LIST *table_list, MEM_ROOT *mem_root,
c1: name lock t2; -- blocks
c2: open t1; -- blocks
*/
- if (table->s->version != refresh_version)
+ if (table->needs_reopen_or_name_lock())
{
DBUG_PRINT("note",
("Found table '%s.%s' with different refresh version",
@@ -1507,6 +1763,14 @@ TABLE *open_table(THD *thd, TABLE_LIST *table_list, MEM_ROOT *mem_root,
continue;
}
+ /* Avoid self-deadlocks by detecting self-dependencies. */
+ if (table->open_placeholder && table->in_use == thd)
+ {
+ VOID(pthread_mutex_unlock(&LOCK_open));
+ my_error(ER_UPDATE_TABLE_USED, MYF(0), table->s->table_name);
+ DBUG_RETURN(0);
+ }
+
/*
Back off, part 1: mark the table as "unused" for the
purpose of name-locking by setting table->db_stat to 0. Do
@@ -1523,6 +1787,14 @@ TABLE *open_table(THD *thd, TABLE_LIST *table_list, MEM_ROOT *mem_root,
and wait till the operation is complete: when any
operation that juggles with table->s->version completes,
it broadcasts COND_refresh condition variable.
+ If 'old' table we met is in use by current thread we return
+ without waiting since in this situation it's this thread
+ which is responsible for broadcasting on COND_refresh
+ (and this was done already in close_old_data_files()).
+ Good example of such situation is when we have statement
+ that needs two instances of table and FLUSH TABLES comes
+ after we open first instance but before we open second
+ instance.
*/
if (table->in_use != thd)
{
@@ -1564,6 +1836,40 @@ TABLE *open_table(THD *thd, TABLE_LIST *table_list, MEM_ROOT *mem_root,
while (open_cache.records > table_cache_size && unused_tables)
VOID(hash_delete(&open_cache,(byte*) unused_tables)); /* purecov: tested */
+ if (table_list->create)
+ {
+ bool exists;
+
+ if (check_if_table_exists(thd, table_list, &exists))
+ {
+ VOID(pthread_mutex_unlock(&LOCK_open));
+ DBUG_RETURN(NULL);
+ }
+
+ if (!exists)
+ {
+ /*
+ Table to be created, so we need to create placeholder in table-cache.
+ */
+ if (!(table= table_cache_insert_placeholder(thd, key, key_length)))
+ {
+ VOID(pthread_mutex_unlock(&LOCK_open));
+ DBUG_RETURN(NULL);
+ }
+ /*
+ Link placeholder to the open tables list so it will be automatically
+ removed once tables are closed. Also mark it so it won't be ignored
+ by other trying to take name-lock.
+ */
+ table->open_placeholder= 1;
+ table->next= thd->open_tables;
+ thd->open_tables= table;
+ VOID(pthread_mutex_unlock(&LOCK_open));
+ DBUG_RETURN(table);
+ }
+ /* Table exists. Let us try to open it. */
+ }
+
/* make a new table */
if (!(table=(TABLE*) my_malloc(sizeof(*table),MYF(MY_WME))))
{
@@ -1794,9 +2100,24 @@ bool close_data_tables(THD *thd,const char *db, const char *table_name)
}
-/*
- Reopen all tables with closed data files
- One should have lock on LOCK_open when calling this
+/**
+ @brief Reopen all tables with closed data files.
+
+ @param thd Thread context
+ @param get_locks Should we get locks after reopening tables ?
+ @param in_refresh Are we in FLUSH TABLES ? TODO: It seems that
+ we can remove this parameter.
+
+ @note Since this function can't properly handle prelocking and
+ create placeholders it should be used in very special
+ situations like FLUSH TABLES or ALTER TABLE. In general
+ case one should just repeat open_tables()/lock_tables()
+ combination when one needs tables to be reopened (for
+ example see open_and_lock_tables()).
+
+ @note One should have lock on LOCK_open when calling this.
+
+ @return FALSE in case of success, TRUE - otherwise.
*/
bool reopen_tables(THD *thd,bool get_locks,bool in_refresh)
@@ -1841,7 +2162,7 @@ bool reopen_tables(THD *thd,bool get_locks,bool in_refresh)
if (in_refresh)
{
table->s->version=0;
- table->locked_by_flush=0;
+ table->open_placeholder= 0;
}
}
}
@@ -1867,35 +2188,71 @@ bool reopen_tables(THD *thd,bool get_locks,bool in_refresh)
DBUG_RETURN(error);
}
-/*
- Close handlers for tables in list, but leave the TABLE structure
- intact so that we can re-open these quickly
- abort_locks is set if called from flush_tables.
+
+/**
+ @brief Close handlers for tables in list, but leave the TABLE structure
+ intact so that we can re-open these quickly.
+
+ @param thd Thread context
+ @param table Head of the list of TABLE objects
+ @param morph_locks TRUE - remove locks which we have on tables being closed
+ but ensure that no DML or DDL will sneak in before
+ we will re-open the table (i.e. temporarily morph
+ our table-level locks into name-locks).
+ FALSE - otherwise
+ @param send_refresh Should we awake waiters even if we didn't close any tables?
*/
-void close_old_data_files(THD *thd, TABLE *table, bool abort_locks,
+void close_old_data_files(THD *thd, TABLE *table, bool morph_locks,
bool send_refresh)
{
DBUG_ENTER("close_old_data_files");
bool found=send_refresh;
for (; table ; table=table->next)
{
- if (table->s->version != refresh_version)
+ if (table->needs_reopen_or_name_lock())
{
found=1;
- if (!abort_locks) // If not from flush tables
+ /*
+ Note that it is safe to update version even for open placeholders
+ as later in this function we reset TABLE::open_placeholder and thus
+ effectively remove them from the table cache.
+ */
+ if (!morph_locks) // If not from flush tables
table->s->version= refresh_version; // Let other threads use table
if (table->db_stat)
{
- if (abort_locks)
- {
- mysql_lock_abort(thd,table); // Close waiting threads
- mysql_lock_remove(thd, thd->locked_tables,table);
- table->locked_by_flush=1; // Will be reopened with locks
- }
+ if (morph_locks)
+ {
+ /*
+ Wake up threads waiting for table-level lock on this table
+ so they won't sneak in when we will temporarily remove our
+ lock on it. This will also give them a chance to close their
+ instances of this table.
+ */
+ mysql_lock_abort(thd, table);
+ mysql_lock_remove(thd, thd->locked_tables, table);
+ /*
+ We want to protect the table from concurrent DDL operations
+ (like RENAME TABLE) until we will re-open and re-lock it.
+ */
+ table->open_placeholder= 1;
+ }
table->file->close();
table->db_stat=0;
}
+ else if (table->open_placeholder)
+ {
+ /*
+ We come here only in close-for-back-off scenario. So we have to
+ "close" create placeholder here to avoid deadlocks (for example,
+ in case of concurrent execution of CREATE TABLE t1 SELECT * FROM t2
+ and RENAME TABLE t2 TO t1). In close-for-re-open scenario we will
+ probably want to let it stay.
+ */
+ DBUG_ASSERT(!morph_locks);
+ table->open_placeholder= 0;
+ }
}
}
if (found)
@@ -1923,9 +2280,8 @@ bool table_is_used(TABLE *table, bool wait_for_name_lock)
search= (TABLE*) hash_next(&open_cache, (byte*) key,
key_length, &state))
{
- if (search->locked_by_flush ||
- search->locked_by_name && wait_for_name_lock ||
- search->db_stat && search->s->version < refresh_version)
+ if (search->locked_by_name && wait_for_name_lock ||
+ search->is_name_opened() && search->needs_reopen_or_name_lock())
return 1; // Table is used
}
} while ((table=table->next));
@@ -2277,7 +2633,7 @@ int open_tables(THD *thd, TABLE_LIST **start, uint *counter, uint flags)
*/
if (!thd->prelocked_mode && !thd->lex->requires_prelocking() &&
- thd->lex->sroutines_list.elements)
+ thd->lex->uses_stored_routines())
{
bool first_no_prelocking, need_prelocking, tabs_changed;
TABLE_LIST **save_query_tables_last= thd->lex->query_tables_last;
@@ -2465,7 +2821,7 @@ process_view_routines:
*/
if (tables->view && !thd->prelocked_mode &&
!thd->lex->requires_prelocking() &&
- tables->view->sroutines_list.elements)
+ tables->view->uses_stored_routines())
{
/* We have at least one table in TL here. */
if (!query_tables_last_own)
@@ -5666,7 +6022,7 @@ bool remove_table_from_cache(THD *thd, const char *db, const char *table_name,
else if (in_use != thd)
{
in_use->some_tables_deleted=1;
- if (table->db_stat)
+ if (table->is_name_opened())
{
DBUG_PRINT("info", ("Found another active instance of the table"));
result=1;
diff --git a/sql/sql_cache.cc b/sql/sql_cache.cc
index 795711b34d8..33d658ce6a1 100644
--- a/sql/sql_cache.cc
+++ b/sql/sql_cache.cc
@@ -865,9 +865,12 @@ void Query_cache::store_query(THD *thd, TABLE_LIST *tables_used)
flags.max_sort_length= thd->variables.max_sort_length;
flags.lc_time_names= thd->variables.lc_time_names;
flags.group_concat_max_len= thd->variables.group_concat_max_len;
+ flags.div_precision_increment= thd->variables.div_precincrement;
+ flags.default_week_format= thd->variables.default_week_format;
DBUG_PRINT("qcache", ("long %d, 4.1: %d, more results %d, pkt_nr: %d, \
CS client: %u, CS result: %u, CS conn: %u, limit: %lu, TZ: 0x%lx, \
-sql mode: 0x%lx, sort len: %lu, conncat len: %lu",
+sql mode: 0x%lx, sort len: %lu, conncat len: %lu, div_precision: %lu, \
+def_week_frmt: %lu",
(int)flags.client_long_flag,
(int)flags.client_protocol_41,
(int)flags.more_results_exists,
@@ -879,7 +882,9 @@ sql mode: 0x%lx, sort len: %lu, conncat len: %lu",
(ulong) flags.time_zone,
flags.sql_mode,
flags.max_sort_length,
- flags.group_concat_max_len));
+ flags.group_concat_max_len,
+ flags.div_precision_increment,
+ flags.default_week_format));
/*
Make InnoDB to release the adaptive hash index latch before
acquiring the query cache mutex.
@@ -1107,10 +1112,13 @@ Query_cache::send_result_to_client(THD *thd, char *sql, uint query_length)
flags.sql_mode= thd->variables.sql_mode;
flags.max_sort_length= thd->variables.max_sort_length;
flags.group_concat_max_len= thd->variables.group_concat_max_len;
+ flags.div_precision_increment= thd->variables.div_precincrement;
+ flags.default_week_format= thd->variables.default_week_format;
flags.lc_time_names= thd->variables.lc_time_names;
DBUG_PRINT("qcache", ("long %d, 4.1: %d, more results %d, pkt_nr: %d, \
CS client: %u, CS result: %u, CS conn: %u, limit: %lu, TZ: 0x%lx, \
-sql mode: 0x%lx, sort len: %lu, conncat len: %lu",
+sql mode: 0x%lx, sort len: %lu, conncat len: %lu, div_precision: %lu, \
+def_week_frmt: %lu",
(int)flags.client_long_flag,
(int)flags.client_protocol_41,
(int)flags.more_results_exists,
@@ -1122,7 +1130,9 @@ sql mode: 0x%lx, sort len: %lu, conncat len: %lu",
(ulong) flags.time_zone,
flags.sql_mode,
flags.max_sort_length,
- flags.group_concat_max_len));
+ flags.group_concat_max_len,
+ flags.div_precision_increment,
+ flags.default_week_format));
memcpy((void *)(sql + (tot_length - QUERY_CACHE_FLAGS_SIZE)),
&flags, QUERY_CACHE_FLAGS_SIZE);
query_block = (Query_cache_block *) hash_search(&queries, (byte*) sql,
diff --git a/sql/sql_class.cc b/sql/sql_class.cc
index 6ec14426162..010dc101e0d 100644
--- a/sql/sql_class.cc
+++ b/sql/sql_class.cc
@@ -176,7 +176,7 @@ THD::THD()
rand_used(0), time_zone_used(0),
last_insert_id_used(0), last_insert_id_used_bin_log(0), insert_id_used(0),
clear_next_insert_id(0), in_lock_tables(0), bootstrap(0),
- derived_tables_processing(FALSE), spcont(NULL)
+ derived_tables_processing(FALSE), spcont(NULL), m_lip(NULL)
{
ulong tmp;
diff --git a/sql/sql_class.h b/sql/sql_class.h
index 7dd46e2efe7..5f813e82307 100644
--- a/sql/sql_class.h
+++ b/sql/sql_class.h
@@ -28,6 +28,7 @@ class Slave_log_event;
class Format_description_log_event;
class sp_rcontext;
class sp_cache;
+class Lex_input_stream;
enum enum_enable_or_disable { LEAVE_AS_IS, ENABLE, DISABLE };
enum enum_ha_read_modes { RFIRST, RNEXT, RPREV, RLAST, RKEY, RNEXT_SAME };
@@ -494,7 +495,7 @@ public:
};
-class delayed_insert;
+class Delayed_insert;
class select_result;
#define THD_SENTRY_MAGIC 0xfeedd1ff
@@ -1247,7 +1248,7 @@ public:
time_t start_time,time_after_lock,user_time;
time_t connect_time,thr_create_time; // track down slow pthread_create
thr_lock_type update_lock_default;
- delayed_insert *di;
+ Delayed_insert *di;
/* <> 0 if we are inside of trigger or stored function. */
uint in_sub_stmt;
@@ -1500,6 +1501,15 @@ public:
query_id_t first_query_id;
} binlog_evt_union;
+ /**
+ Character input stream consumed by the lexical analyser,
+ used during parsing.
+ Note that since the parser is not re-entrant, we keep only one input
+ stream here. This member is valid only when executing code during parsing,
+ and may point to invalid memory after that.
+ */
+ Lex_input_stream *m_lip;
+
THD();
~THD();
diff --git a/sql/sql_handler.cc b/sql/sql_handler.cc
index d1a5ab7dfa8..e1318aa2736 100644
--- a/sql/sql_handler.cc
+++ b/sql/sql_handler.cc
@@ -670,7 +670,7 @@ int mysql_ha_flush(THD *thd, TABLE_LIST *tables, uint mode_flags,
while (*table_ptr)
{
if ((mode_flags & MYSQL_HA_FLUSH_ALL) ||
- ((*table_ptr)->s->version != refresh_version))
+ (*table_ptr)->needs_reopen_or_name_lock())
{
/* The first time it is required, lock for close_thread_table(). */
if (! did_lock && ! is_locked)
@@ -771,15 +771,22 @@ void mysql_ha_mark_tables_for_reopen(THD *thd, TABLE *table)
safe_mutex_assert_owner(&LOCK_open);
for (; table; table= table->next)
{
- TABLE_LIST *hash_tables;
- if ((hash_tables= (TABLE_LIST*) hash_search(&thd->handler_tables_hash,
- (byte*) table->alias,
- strlen(table->alias) + 1)))
+ /*
+ Some elements in open table list, for example placeholders used for
+ name-locking, can have alias set to 0.
+ */
+ if (table->alias)
{
- /* Mark table as ready for reopen. */
- hash_tables->table= NULL;
- /* End open index/table scans. */
- table->file->ha_index_or_rnd_end();
+ TABLE_LIST *hash_tables;
+ if ((hash_tables= (TABLE_LIST*) hash_search(&thd->handler_tables_hash,
+ (byte*) table->alias,
+ strlen(table->alias) + 1)))
+ {
+ /* Mark table as ready for reopen. */
+ hash_tables->table= NULL;
+ /* End open index/table scans. */
+ table->file->ha_index_or_rnd_end();
+ }
}
}
DBUG_VOID_RETURN;
diff --git a/sql/sql_insert.cc b/sql/sql_insert.cc
index 5f54bc2b43b..5720758128e 100644
--- a/sql/sql_insert.cc
+++ b/sql/sql_insert.cc
@@ -29,7 +29,7 @@
waited for to open and lock the table.
If accessing the thread succeeded, in
- delayed_insert::get_local_table() the table of the thread is copied
+ Delayed_insert::get_local_table() the table of the thread is copied
for local use. A copy is required because the normal insert logic
works on a target table, but the other threads table object must not
be used. The insert logic uses the record buffer to create a record.
@@ -61,7 +61,7 @@
#include "slave.h"
#ifndef EMBEDDED_LIBRARY
-static TABLE *delayed_get_table(THD *thd,TABLE_LIST *table_list);
+static bool delayed_get_table(THD *thd, TABLE_LIST *table_list);
static int write_delayed(THD *thd,TABLE *table, enum_duplicates dup, bool ignore,
char *query, uint query_length, bool log_on);
static void end_delayed_insert(THD *thd);
@@ -401,6 +401,154 @@ void mark_fields_used_by_triggers_for_insert_stmt(THD *thd, TABLE *table,
}
+/**
+ Upgrade table-level lock of INSERT statement to TL_WRITE if
+ a more concurrent lock is infeasible for some reason. This is
+ necessary for engines without internal locking support (MyISAM).
+ An engine with internal locking implementation might later
+ downgrade the lock in handler::store_lock() method.
+*/
+
+static
+void upgrade_lock_type(THD *thd, thr_lock_type *lock_type,
+ enum_duplicates duplic,
+ bool is_multi_insert)
+{
+ if (duplic == DUP_UPDATE ||
+ duplic == DUP_REPLACE && *lock_type == TL_WRITE_CONCURRENT_INSERT)
+ {
+ *lock_type= TL_WRITE;
+ return;
+ }
+
+ if (*lock_type == TL_WRITE_DELAYED)
+ {
+ /*
+ We do not use delayed threads if:
+ - we're running in the safe mode or skip-new mode -- the
+ feature is disabled in these modes
+ - we're executing this statement on a replication slave --
+ we need to ensure serial execution of queries on the
+ slave
+ - it is INSERT .. ON DUPLICATE KEY UPDATE - in this case the
+ insert cannot be concurrent
+ - this statement is directly or indirectly invoked from
+ a stored function or trigger (under pre-locking) - to
+ avoid deadlocks, since INSERT DELAYED involves a lock
+ upgrade (TL_WRITE_DELAYED -> TL_WRITE) which we should not
+ attempt while keeping other table level locks.
+ - this statement itself may require pre-locking.
+ We should upgrade the lock even though in most cases
+ delayed functionality may work. Unfortunately, we can't
+ easily identify whether the subject table is not used in
+ the statement indirectly via a stored function or trigger:
+ if it is used, that will lead to a deadlock between the
+ client connection and the delayed thread.
+ */
+ if (specialflag & (SPECIAL_NO_NEW_FUNC | SPECIAL_SAFE_MODE) ||
+ thd->slave_thread ||
+ thd->variables.max_insert_delayed_threads == 0 ||
+ thd->prelocked_mode ||
+ thd->lex->uses_stored_routines())
+ {
+ *lock_type= TL_WRITE;
+ return;
+ }
+ bool log_on= (thd->options & OPTION_BIN_LOG ||
+ ! (thd->security_ctx->master_access & SUPER_ACL));
+ if (log_on && mysql_bin_log.is_open() && is_multi_insert)
+ {
+ /*
+ Statement-based binary logging does not work in this case, because:
+ a) two concurrent statements may have their rows intermixed in the
+ queue, leading to autoincrement replication problems on slave (because
+ the values generated used for one statement don't depend only on the
+ value generated for the first row of this statement, so are not
+ replicable)
+ b) if first row of the statement has an error the full statement is
+ not binlogged, while next rows of the statement may be inserted.
+ c) if first row succeeds, statement is binlogged immediately with a
+ zero error code (i.e. "no error"), if then second row fails, query
+ will fail on slave too and slave will stop (wrongly believing that the
+ master got no error).
+ So we fall back to non-delayed INSERT.
+ */
+ *lock_type= TL_WRITE;
+ }
+ }
+}
+
+
+/**
+ Find or create a delayed insert thread for the first table in
+ the table list, then open and lock the remaining tables.
+ If a table can not be used with insert delayed, upgrade the lock
+ and open and lock all tables using the standard mechanism.
+
+ @param thd thread context
+ @param table_list list of "descriptors" for tables referenced
+ directly in statement SQL text.
+ The first element in the list corresponds to
+ the destination table for inserts, remaining
+ tables, if any, are usually tables referenced
+ by sub-queries in the right part of the
+ INSERT.
+
+ @return Status of the operation. In case of success 'table'
+ member of every table_list element points to an instance of
+ class TABLE.
+
+ @sa open_and_lock_tables for more information about MySQL table
+ level locking
+*/
+
+static
+bool open_and_lock_for_insert_delayed(THD *thd, TABLE_LIST *table_list)
+{
+ DBUG_ENTER("open_and_lock_for_insert_delayed");
+
+#ifndef EMBEDDED_LIBRARY
+ if (delayed_get_table(thd, table_list))
+ DBUG_RETURN(TRUE);
+
+ if (table_list->table)
+ {
+ /*
+ Open tables used for sub-selects or in stored functions, will also
+ cache these functions.
+ */
+ if (open_and_lock_tables(thd, table_list->next_global))
+ {
+ end_delayed_insert(thd);
+ DBUG_RETURN(TRUE);
+ }
+ /*
+ First table was not processed by open_and_lock_tables(),
+ we need to set updatability flag "by hand".
+ */
+ if (!table_list->derived && !table_list->view)
+ table_list->updatable= 1; // usual table
+ DBUG_RETURN(FALSE);
+ }
+#endif
+ /*
+ * This is embedded library and we don't have auxiliary
+ threads OR
+ * a lock upgrade was requested inside delayed_get_table
+ because
+ - there are too many delayed insert threads OR
+ - the table has triggers.
+ Use a normal insert.
+ */
+ table_list->lock_type= TL_WRITE;
+ DBUG_RETURN(open_and_lock_tables(thd, table_list));
+}
+
+
+/**
+ INSERT statement implementation
+*/
+
bool mysql_insert(THD *thd,TABLE_LIST *table_list,
List<Item> &fields,
List<List_item> &values_list,
@@ -410,11 +558,6 @@ bool mysql_insert(THD *thd,TABLE_LIST *table_list,
bool ignore)
{
int error, res;
- /*
- log_on is about delayed inserts only.
- By default, both logs are enabled (this won't cause problems if the server
- runs without --log-update or --log-bin).
- */
bool transactional_table, joins_freed= FALSE;
bool changed;
uint value_count;
@@ -428,92 +571,49 @@ bool mysql_insert(THD *thd,TABLE_LIST *table_list,
Name_resolution_context_state ctx_state;
#ifndef EMBEDDED_LIBRARY
char *query= thd->query;
-#endif
+ /*
+ log_on is about delayed inserts only.
+ By default, both logs are enabled (this won't cause problems if the server
+ runs without --log-update or --log-bin).
+ */
bool log_on= (thd->options & OPTION_BIN_LOG) ||
(!(thd->security_ctx->master_access & SUPER_ACL));
+#endif
thr_lock_type lock_type = table_list->lock_type;
Item *unused_conds= 0;
DBUG_ENTER("mysql_insert");
/*
- in safe mode or with skip-new change delayed insert to be regular
- if we are told to replace duplicates, the insert cannot be concurrent
- delayed insert changed to regular in slave thread
- */
-#ifdef EMBEDDED_LIBRARY
- if (lock_type == TL_WRITE_DELAYED)
- lock_type=TL_WRITE;
-#else
- if ((lock_type == TL_WRITE_DELAYED &&
- ((specialflag & (SPECIAL_NO_NEW_FUNC | SPECIAL_SAFE_MODE)) ||
- thd->slave_thread || !thd->variables.max_insert_delayed_threads)) ||
- (lock_type == TL_WRITE_CONCURRENT_INSERT && duplic == DUP_REPLACE) ||
- (duplic == DUP_UPDATE))
- lock_type=TL_WRITE;
-#endif
- if ((lock_type == TL_WRITE_DELAYED) &&
- log_on && mysql_bin_log.is_open() &&
- (values_list.elements > 1))
+ Upgrade lock type if the requested lock is incompatible with
+ the current connection mode or table operation.
+ */
+ upgrade_lock_type(thd, &table_list->lock_type, duplic,
+ values_list.elements > 1);
+
+ /*
+ We can't write-delayed into a table locked with LOCK TABLES:
+ this will lead to a deadlock, since the delayed thread will
+ never be able to get a lock on the table. QQQ: why not
+ upgrade the lock here instead?
+ */
+ if (table_list->lock_type == TL_WRITE_DELAYED && thd->locked_tables &&
+ find_locked_table(thd, table_list->db, table_list->table_name))
{
- /*
- Statement-based binary logging does not work in this case, because:
- a) two concurrent statements may have their rows intermixed in the
- queue, leading to autoincrement replication problems on slave (because
- the values generated used for one statement don't depend only on the
- value generated for the first row of this statement, so are not
- replicable)
- b) if first row of the statement has an error the full statement is
- not binlogged, while next rows of the statement may be inserted.
- c) if first row succeeds, statement is binlogged immediately with a
- zero error code (i.e. "no error"), if then second row fails, query
- will fail on slave too and slave will stop (wrongly believing that the
- master got no error).
- So we fallback to non-delayed INSERT.
- */
- lock_type= TL_WRITE;
+ my_error(ER_DELAYED_INSERT_TABLE_LOCKED, MYF(0),
+ table_list->table_name);
+ DBUG_RETURN(TRUE);
}
- table_list->lock_type= lock_type;
-#ifndef EMBEDDED_LIBRARY
- if (lock_type == TL_WRITE_DELAYED)
+ if (table_list->lock_type == TL_WRITE_DELAYED)
{
- res= 1;
- if (thd->locked_tables)
- {
- DBUG_ASSERT(table_list->db); /* Must be set in the parser */
- if (find_locked_table(thd, table_list->db, table_list->table_name))
- {
- my_error(ER_DELAYED_INSERT_TABLE_LOCKED, MYF(0),
- table_list->table_name);
- DBUG_RETURN(TRUE);
- }
- }
- if ((table= delayed_get_table(thd,table_list)) && !thd->is_fatal_error)
- {
- /*
- Open tables used for sub-selects or in stored functions, will also
- cache these functions.
- */
- res= open_and_lock_tables(thd, table_list->next_global);
- /*
- First is not processed by open_and_lock_tables() => we need set
- updateability flags "by hands".
- */
- if (!table_list->derived && !table_list->view)
- table_list->updatable= 1; // usual table
- }
- else if (thd->net.last_errno != ER_WRONG_OBJECT)
- {
- /* Too many delayed insert threads; Use a normal insert */
- table_list->lock_type= lock_type= TL_WRITE;
- res= open_and_lock_tables(thd, table_list);
- }
+ if (open_and_lock_for_insert_delayed(thd, table_list))
+ DBUG_RETURN(TRUE);
}
else
-#endif /* EMBEDDED_LIBRARY */
- res= open_and_lock_tables(thd, table_list);
- if (res || thd->is_fatal_error)
- DBUG_RETURN(TRUE);
+ {
+ if (open_and_lock_tables(thd, table_list))
+ DBUG_RETURN(TRUE);
+ }
thd->proc_info="init";
thd->used_tables=0;
@@ -531,6 +631,7 @@ bool mysql_insert(THD *thd,TABLE_LIST *table_list,
/* mysql_prepare_insert set table_list->table if it was not set */
table= table_list->table;
+ lock_type= table_list->lock_type;
context= &thd->lex->select_lex.context;
/*
@@ -1461,8 +1562,14 @@ public:
}
};
+/**
+ Delayed_insert - context of a thread responsible for delayed insert
+ into one table. When processing delayed inserts, we create an own
+ thread for every distinct table. Later on all delayed inserts directed
+ into that table are handled by a dedicated thread.
+*/
-class delayed_insert :public ilink {
+class Delayed_insert :public ilink {
uint locks_in_memory;
public:
THD thd;
@@ -1476,7 +1583,7 @@ public:
ulong group_count;
TABLE_LIST table_list; // Argument
- delayed_insert()
+ Delayed_insert()
:locks_in_memory(0),
table(0),tables_in_use(0),stacked_inserts(0), status(0), dead(0),
group_count(0)
@@ -1501,7 +1608,7 @@ public:
delayed_insert_threads++;
VOID(pthread_mutex_unlock(&LOCK_thread_count));
}
- ~delayed_insert()
+ ~Delayed_insert()
{
/* The following is not really needed, but just for safety */
delayed_row *row;
@@ -1549,15 +1656,21 @@ public:
};
-I_List<delayed_insert> delayed_threads;
+I_List<Delayed_insert> delayed_threads;
+
+/**
+ Return an instance of delayed insert thread that can handle
+ inserts into a given table, if it exists. Otherwise return NULL.
+*/
-delayed_insert *find_handler(THD *thd, TABLE_LIST *table_list)
+static
+Delayed_insert *find_handler(THD *thd, TABLE_LIST *table_list)
{
thd->proc_info="waiting for delay_list";
pthread_mutex_lock(&LOCK_delayed_insert); // Protect master list
- I_List_iterator<delayed_insert> it(delayed_threads);
- delayed_insert *tmp;
+ I_List_iterator<Delayed_insert> it(delayed_threads);
+ Delayed_insert *tmp;
while ((tmp=it++))
{
if (!strcmp(tmp->thd.db,table_list->db) &&
@@ -1572,11 +1685,36 @@ delayed_insert *find_handler(THD *thd, TABLE_LIST *table_list)
}
-static TABLE *delayed_get_table(THD *thd,TABLE_LIST *table_list)
+/**
+ Attempt to find or create a delayed insert thread to handle inserts
+ into this table.
+
+ @return In case of success, table_list->table points to a local copy
+ of the delayed table or is set to NULL, which indicates a
+ request for lock upgrade. In case of failure, value of
+ table_list->table is undefined.
+ @retval TRUE - this thread ran out of resources OR
+ - a newly created delayed insert thread ran out of
+ resources OR
+ - the created thread failed to open and lock the table
+ (e.g. because it does not exist) OR
+ - the table opened in the created thread turned out to
+ be a view
+ @retval FALSE - table successfully opened OR
+ - too many delayed insert threads OR
+ - the table has triggers and we have to fall back to
+ a normal INSERT
+ Two latter cases indicate a request for lock upgrade.
+
+ XXX: why do we regard INSERT DELAYED into a view as an error and
+ do not simply a lock upgrade?
+*/
+
+static
+bool delayed_get_table(THD *thd, TABLE_LIST *table_list)
{
int error;
- delayed_insert *tmp;
- TABLE *table;
+ Delayed_insert *tmp;
DBUG_ENTER("delayed_get_table");
/* Must be set in the parser */
@@ -1599,10 +1737,11 @@ static TABLE *delayed_get_table(THD *thd,TABLE_LIST *table_list)
*/
if (! (tmp= find_handler(thd, table_list)))
{
- if (!(tmp=new delayed_insert()))
+ if (!(tmp=new Delayed_insert()))
{
- my_error(ER_OUTOFMEMORY,MYF(0),sizeof(delayed_insert));
- goto err1;
+ my_error(ER_OUTOFMEMORY,MYF(0),sizeof(Delayed_insert));
+ thd->fatal_error();
+ goto end_create;
}
pthread_mutex_lock(&LOCK_thread_count);
thread_count++;
@@ -1611,9 +1750,10 @@ static TABLE *delayed_get_table(THD *thd,TABLE_LIST *table_list)
tmp->thd.query= my_strdup(table_list->table_name,MYF(MY_WME));
if (tmp->thd.db == NULL || tmp->thd.query == NULL)
{
+ /* The error is reported */
delete tmp;
- my_message(ER_OUT_OF_RESOURCES, ER(ER_OUT_OF_RESOURCES), MYF(0));
- goto err1;
+ thd->fatal_error();
+ goto end_create;
}
tmp->table_list= *table_list; // Needed to open table
tmp->table_list.alias= tmp->table_list.table_name= tmp->thd.query;
@@ -1629,7 +1769,8 @@ static TABLE *delayed_get_table(THD *thd,TABLE_LIST *table_list)
tmp->unlock();
delete tmp;
my_error(ER_CANT_CREATE_THREAD, MYF(0), error);
- goto err1;
+ thd->fatal_error();
+ goto end_create;
}
/* Wait until table is open */
@@ -1642,57 +1783,69 @@ static TABLE *delayed_get_table(THD *thd,TABLE_LIST *table_list)
thd->proc_info="got old table";
if (tmp->thd.killed)
{
- if (tmp->thd.is_fatal_error)
+ if (tmp->thd.net.report_error)
{
- /* Copy error message and abort */
- thd->fatal_error();
- strmov(thd->net.last_error,tmp->thd.net.last_error);
- thd->net.last_errno=tmp->thd.net.last_errno;
+ /*
+ Copy the error message. Note that we don't treat fatal
+ errors in the delayed thread as fatal errors in the
+ main thread. Use of my_message will enable stored
+ procedures continue handlers.
+ */
+ my_message(tmp->thd.net.last_errno, tmp->thd.net.last_error,
+ MYF(0));
}
tmp->unlock();
- goto err;
+ goto end_create;
}
if (thd->killed)
{
tmp->unlock();
- goto err;
+ goto end_create;
}
}
pthread_mutex_unlock(&LOCK_delayed_create);
}
pthread_mutex_lock(&tmp->mutex);
- table= tmp->get_local_table(thd);
+ table_list->table= tmp->get_local_table(thd);
pthread_mutex_unlock(&tmp->mutex);
- if (table)
+ if (table_list->table)
+ {
+ DBUG_ASSERT(thd->net.report_error == 0);
thd->di=tmp;
- else if (tmp->thd.is_fatal_error)
- thd->fatal_error();
+ }
/* Unlock the delayed insert object after its last access. */
tmp->unlock();
- DBUG_RETURN((table_list->table=table));
+ DBUG_RETURN(table_list->table == NULL);
- err1:
- thd->fatal_error();
- err:
+end_create:
pthread_mutex_unlock(&LOCK_delayed_create);
- DBUG_RETURN(0); // Continue with normal insert
+ DBUG_RETURN(thd->net.report_error);
}
-/*
- As we can't let many threads modify the same TABLE structure, we create
- an own structure for each tread. This includes a row buffer to save the
- column values and new fields that points to the new row buffer.
- The memory is allocated in the client thread and is freed automaticly.
+/**
+ As we can't let many client threads modify the same TABLE
+ structure of the dedicated delayed insert thread, we create an
+ own structure for each client thread. This includes a row
+ buffer to save the column values and new fields that point to
+ the new row buffer. The memory is allocated in the client
+ thread and is freed automatically.
+
+ @pre This function is called from the client thread. Delayed
+ insert thread mutex must be acquired before invoking this
+ function.
+
+ @return Not-NULL table object on success. NULL in case of an error,
+ which is set in client_thd.
*/
-TABLE *delayed_insert::get_local_table(THD* client_thd)
+TABLE *Delayed_insert::get_local_table(THD* client_thd)
{
my_ptrdiff_t adjust_ptrs;
Field **field,**org_field, *found_next_number_field;
TABLE *copy;
- DBUG_ENTER("delayed_insert::get_local_table");
+ DBUG_ENTER("Delayed_insert::get_local_table");
/* First request insert thread to get a lock */
status=1;
@@ -1710,8 +1863,7 @@ TABLE *delayed_insert::get_local_table(THD* client_thd)
goto error;
if (dead)
{
- strmov(client_thd->net.last_error,thd.net.last_error);
- client_thd->net.last_errno=thd.net.last_errno;
+ my_message(thd.net.last_errno, thd.net.last_error, MYF(0));
goto error;
}
}
@@ -1756,7 +1908,7 @@ TABLE *delayed_insert::get_local_table(THD* client_thd)
for (org_field= table->field; *org_field; org_field++, field++)
{
if (!(*field= (*org_field)->new_field(client_thd->mem_root, copy, 1)))
- DBUG_RETURN(0);
+ goto error;
(*field)->orig_table= copy; // Remove connection
(*field)->move_field(adjust_ptrs); // Point at copy->record[0]
if (*org_field == found_next_number_field)
@@ -1796,11 +1948,12 @@ TABLE *delayed_insert::get_local_table(THD* client_thd)
/* Put a question in queue */
-static int write_delayed(THD *thd,TABLE *table,enum_duplicates duplic, bool ignore,
- char *query, uint query_length, bool log_on)
+static
+int write_delayed(THD *thd,TABLE *table,enum_duplicates duplic, bool ignore,
+ char *query, uint query_length, bool log_on)
{
delayed_row *row=0;
- delayed_insert *di=thd->di;
+ Delayed_insert *di=thd->di;
DBUG_ENTER("write_delayed");
thd->proc_info="waiting for handler insert";
@@ -1864,11 +2017,15 @@ static int write_delayed(THD *thd,TABLE *table,enum_duplicates duplic, bool igno
DBUG_RETURN(1);
}
+/**
+ Signal the delayed insert thread that this user connection
+ is finished using it for this statement.
+*/
static void end_delayed_insert(THD *thd)
{
DBUG_ENTER("end_delayed_insert");
- delayed_insert *di=thd->di;
+ Delayed_insert *di=thd->di;
pthread_mutex_lock(&di->mutex);
DBUG_PRINT("info",("tables in use: %d",di->tables_in_use));
if (!--di->tables_in_use || di->thd.killed)
@@ -1887,8 +2044,8 @@ void kill_delayed_threads(void)
{
VOID(pthread_mutex_lock(&LOCK_delayed_insert)); // For unlink from list
- I_List_iterator<delayed_insert> it(delayed_threads);
- delayed_insert *tmp;
+ I_List_iterator<Delayed_insert> it(delayed_threads);
+ Delayed_insert *tmp;
while ((tmp=it++))
{
tmp->thd.killed= THD::KILL_CONNECTION;
@@ -1920,7 +2077,7 @@ void kill_delayed_threads(void)
pthread_handler_t handle_delayed_insert(void *arg)
{
- delayed_insert *di=(delayed_insert*) arg;
+ Delayed_insert *di=(Delayed_insert*) arg;
THD *thd= &di->thd;
pthread_detach_this_thread();
@@ -1976,6 +2133,15 @@ pthread_handler_t handle_delayed_insert(void *arg)
my_error(ER_ILLEGAL_HA, MYF(0), di->table_list.table_name);
goto end;
}
+ if (di->table->triggers)
+ {
+ /*
+ Table has triggers. This is not an error, but we do
+ not support triggers with delayed insert. Terminate the delayed
+ thread without an error and thus request lock upgrade.
+ */
+ goto end;
+ }
di->table->copy_blobs=1;
/* One can now use this */
@@ -2156,7 +2322,7 @@ static void free_delayed_insert_blobs(register TABLE *table)
}
-bool delayed_insert::handle_inserts(void)
+bool Delayed_insert::handle_inserts(void)
{
int error;
ulong max_rows;
@@ -2180,7 +2346,7 @@ bool delayed_insert::handle_inserts(void)
thd.proc_info="insert";
max_rows= delayed_insert_limit;
- if (thd.killed || table->s->version != refresh_version)
+ if (thd.killed || table->needs_reopen_or_name_lock())
{
thd.killed= THD::KILL_CONNECTION;
max_rows= ~(ulong)0; // Do as much as possible
@@ -2792,8 +2958,8 @@ bool select_insert::send_eof()
***************************************************************************/
/*
- Create table from lists of fields and items (or open existing table
- with same name).
+ Create table from lists of fields and items (or just return TABLE
+ object for pre-opened existing table).
SYNOPSIS
create_table_from_items()
@@ -2808,18 +2974,24 @@ bool select_insert::send_eof()
of fields for the table (corresponding fields will
be added to the end of alter_info->create_list)
lock out Pointer to the MYSQL_LOCK object for table created
- (open) will be returned in this parameter. Since
- this table is not included in THD::lock caller is
- responsible for explicitly unlocking this table.
+ (or open temporary table) will be returned in this
+ parameter. Since this table is not included in
+ THD::lock caller is responsible for explicitly
+ unlocking this table.
NOTES
- If 'create_info->options' bitmask has HA_LEX_CREATE_IF_NOT_EXISTS
- flag and table with name provided already exists then this function will
- simply open existing table.
- Also note that create, open and lock sequence in this function is not
- atomic and thus contains gap for deadlock and can cause other troubles.
- Since this function contains some logic specific to CREATE TABLE ... SELECT
- it should be changed before it can be used in other contexts.
+ This function behaves differently for base and temporary tables:
+ - For base table we assume that either table exists and was pre-opened
+ and locked at open_and_lock_tables() stage (and in this case we just
+ emit error or warning and return pre-opened TABLE object) or special
+ placeholder was put in table cache that guarantees that this table
+ won't be created or opened until the placeholder will be removed
+ (so there is an exclusive lock on this table).
+ - We don't pre-open existing temporary table, instead we either open
+ or create and then open table in this function.
+
+ Since this function contains some logic specific to CREATE TABLE ...
+ SELECT it should be changed before it can be used in other contexts.
RETURN VALUES
non-zero Pointer to TABLE object for table created or opened
@@ -2842,6 +3014,25 @@ static TABLE *create_table_from_items(THD *thd, HA_CREATE_INFO *create_info,
bool not_used;
DBUG_ENTER("create_table_from_items");
+ DBUG_EXECUTE_IF("sleep_create_select_before_check_if_exists", my_sleep(6000000););
+
+ if (!(create_info->options & HA_LEX_CREATE_TMP_TABLE) &&
+ create_table->table->db_stat)
+ {
+ /* Table already exists and was open at open_and_lock_tables() stage. */
+ if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS)
+ {
+ create_info->table_existed= 1; // Mark that table existed
+ push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
+ ER_TABLE_EXISTS_ERROR, ER(ER_TABLE_EXISTS_ERROR),
+ create_table->table_name);
+ DBUG_RETURN(create_table->table);
+ }
+
+ my_error(ER_TABLE_EXISTS_ERROR, MYF(0), create_table->table_name);
+ DBUG_RETURN(0);
+ }
+
tmp_table.alias= 0;
tmp_table.timestamp_field= 0;
tmp_table.s= &tmp_table.share_not_to_be_used;
@@ -2870,8 +3061,15 @@ static TABLE *create_table_from_items(THD *thd, HA_CREATE_INFO *create_info,
cr_field->flags &= ~NOT_NULL_FLAG;
alter_info->create_list.push_back(cr_field);
}
+
+ DBUG_EXECUTE_IF("sleep_create_select_before_create", my_sleep(6000000););
+
/*
- create and lock table
+ Create and lock table.
+
+ Note that we either creating (or opening existing) temporary table or
+ creating base table on which name we have exclusive lock. So code below
+ should not cause deadlocks or races.
We don't log the statement, it will be logged later.
@@ -2881,59 +3079,70 @@ static TABLE *create_table_from_items(THD *thd, HA_CREATE_INFO *create_info,
don't want to delete from it) 2) it would be written before the CREATE
TABLE, which is a wrong order. So we keep binary logging disabled when we
open_table().
- NOTE: By locking table which we just have created (or for which we just have
- have found that it already exists) separately from other tables used by the
- statement we create potential window for deadlock.
- TODO: create and open should be done atomic !
*/
{
tmp_disable_binlog(thd);
if (!mysql_create_table(thd, create_table->db, create_table->table_name,
create_info, alter_info, 0, select_field_count))
{
- /*
- If we are here in prelocked mode we either create temporary table
- or prelocked mode is caused by the SELECT part of this statement.
- */
- DBUG_ASSERT(!thd->prelocked_mode ||
- create_info->options & HA_LEX_CREATE_TMP_TABLE ||
- thd->lex->requires_prelocking());
- /*
- NOTE: We don't want to ignore set of locked tables here if we are
- under explicit LOCK TABLES since it will open gap for deadlock
- too wide (and also is not backward compatible).
- */
- if (! (table= open_table(thd, create_table, thd->mem_root, (bool*) 0,
- (MYSQL_LOCK_IGNORE_FLUSH |
- ((thd->prelocked_mode == PRELOCKED) ?
- MYSQL_OPEN_IGNORE_LOCKED_TABLES:0)))))
- quick_rm_table(create_info->db_type, create_table->db,
- table_case_name(create_info, create_table->table_name));
+ if (create_info->table_existed &&
+ !(create_info->options & HA_LEX_CREATE_TMP_TABLE))
+ {
+ /*
+ This means that someone created table underneath server
+ or it was created via different mysqld front-end to the
+ cluster. We don't have much options but throw an error.
+ */
+ my_error(ER_TABLE_EXISTS_ERROR, MYF(0), create_table->table_name);
+ DBUG_RETURN(0);
+ }
+
+ DBUG_EXECUTE_IF("sleep_create_select_before_open", my_sleep(6000000););
+
+ if (!(create_info->options & HA_LEX_CREATE_TMP_TABLE))
+ {
+ VOID(pthread_mutex_lock(&LOCK_open));
+ if (reopen_name_locked_table(thd, create_table, FALSE))
+ {
+ quick_rm_table(create_info->db_type, create_table->db,
+ table_case_name(create_info,
+ create_table->table_name));
+ }
+ else
+ table= create_table->table;
+ VOID(pthread_mutex_unlock(&LOCK_open));
+ }
+ else
+ {
+ if (!(table= open_table(thd, create_table, thd->mem_root, (bool*) 0,
+ MYSQL_OPEN_TEMPORARY_ONLY)) &&
+ !create_info->table_existed)
+ {
+ /*
+ This shouldn't happen as creation of temporary table should make
+ it preparable for open. But let us do close_temporary_table() here
+ just in case.
+ */
+ close_temporary_table(thd, create_table->db, create_table->table_name);
+ }
+ }
}
reenable_binlog(thd);
if (!table) // open failed
DBUG_RETURN(0);
}
- /*
- FIXME: What happens if trigger manages to be created while we are
- obtaining this lock ? May be it is sensible just to disable
- trigger execution in this case ? Or will MYSQL_LOCK_IGNORE_FLUSH
- save us from that ?
- */
+ DBUG_EXECUTE_IF("sleep_create_select_before_lock", my_sleep(6000000););
+
table->reginfo.lock_type=TL_WRITE;
if (! ((*lock)= mysql_lock_tables(thd, &table, 1,
MYSQL_LOCK_IGNORE_FLUSH, &not_used)))
{
- VOID(pthread_mutex_lock(&LOCK_open));
- hash_delete(&open_cache,(byte*) table);
- VOID(pthread_mutex_unlock(&LOCK_open));
- quick_rm_table(create_info->db_type, create_table->db,
- table_case_name(create_info, create_table->table_name));
+ if (!create_info->table_existed)
+ drop_open_table(thd, table, create_table->db, create_table->table_name);
DBUG_RETURN(0);
}
- table->file->extra(HA_EXTRA_WRITE_CACHE);
DBUG_RETURN(table);
}
@@ -2984,8 +3193,10 @@ select_create::prepare(List<Item> &values, SELECT_LEX_UNIT *u)
(thd->variables.sql_mode &
(MODE_STRICT_TRANS_TABLES |
MODE_STRICT_ALL_TABLES)));
- DBUG_RETURN(check_that_all_fields_are_given_values(thd, table,
- table_list));
+ if (check_that_all_fields_are_given_values(thd, table, table_list))
+ DBUG_RETURN(1);
+ table->file->extra(HA_EXTRA_WRITE_CACHE);
+ DBUG_RETURN(0);
}
@@ -3017,31 +3228,18 @@ bool select_create::send_eof()
{
table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
table->file->extra(HA_EXTRA_WRITE_CANNOT_REPLACE);
- VOID(pthread_mutex_lock(&LOCK_open));
- mysql_unlock_tables(thd, lock);
- /*
- TODO:
- Check if we can remove the following two rows.
- We should be able to just keep the table in the table cache.
- */
- if (!table->s->tmp_table)
+ if (lock)
{
- ulong version= table->s->version;
- hash_delete(&open_cache,(byte*) table);
- /* Tell threads waiting for refresh that something has happened */
- if (version != refresh_version)
- broadcast_refresh();
+ mysql_unlock_tables(thd, lock);
+ lock= 0;
}
- lock=0;
- table=0;
- VOID(pthread_mutex_unlock(&LOCK_open));
}
return tmp;
}
+
void select_create::abort()
{
- VOID(pthread_mutex_lock(&LOCK_open));
if (lock)
{
mysql_unlock_tables(thd, lock);
@@ -3051,22 +3249,10 @@ void select_create::abort()
{
table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
table->file->extra(HA_EXTRA_WRITE_CANNOT_REPLACE);
- enum db_type table_type=table->s->db_type;
- if (!table->s->tmp_table)
- {
- ulong version= table->s->version;
- hash_delete(&open_cache,(byte*) table);
- if (!create_info->table_existed)
- quick_rm_table(table_type, create_table->db, create_table->table_name);
- /* Tell threads waiting for refresh that something has happened */
- if (version != refresh_version)
- broadcast_refresh();
- }
- else if (!create_info->table_existed)
- close_temporary_table(thd, create_table->db, create_table->table_name);
+ if (!create_info->table_existed)
+ drop_open_table(thd, table, create_table->db, create_table->table_name);
table=0;
}
- VOID(pthread_mutex_unlock(&LOCK_open));
}
@@ -3077,8 +3263,8 @@ void select_create::abort()
#ifdef HAVE_EXPLICIT_TEMPLATE_INSTANTIATION
template class List_iterator_fast<List_item>;
#ifndef EMBEDDED_LIBRARY
-template class I_List<delayed_insert>;
-template class I_List_iterator<delayed_insert>;
+template class I_List<Delayed_insert>;
+template class I_List_iterator<Delayed_insert>;
template class I_List<delayed_row>;
#endif /* EMBEDDED_LIBRARY */
#endif /* HAVE_EXPLICIT_TEMPLATE_INSTANTIATION */
diff --git a/sql/sql_lex.cc b/sql/sql_lex.cc
index 3be844b6761..7bcdc499011 100644
--- a/sql/sql_lex.cc
+++ b/sql/sql_lex.cc
@@ -32,13 +32,13 @@ sys_var_long_ptr trg_new_row_fake_var(0, 0);
/* Macros to look like lex */
-#define yyGet() *(lex->ptr++)
-#define yyGetLast() lex->ptr[-1]
-#define yyPeek() lex->ptr[0]
-#define yyPeek2() lex->ptr[1]
-#define yyUnget() lex->ptr--
-#define yySkip() lex->ptr++
-#define yyLength() ((uint) (lex->ptr - lex->tok_start)-1)
+#define yyGet() *(lip->ptr++)
+#define yyGetLast() lip->ptr[-1]
+#define yyPeek() lip->ptr[0]
+#define yyPeek2() lip->ptr[1]
+#define yyUnget() lip->ptr--
+#define yySkip() lip->ptr++
+#define yyLength() ((uint) (lip->ptr - lip->tok_start)-1)
/* Longest standard keyword name */
#define TOCK_NAME_LENGTH 24
@@ -108,6 +108,29 @@ st_parsing_options::reset()
allows_derived= TRUE;
}
+Lex_input_stream::Lex_input_stream(THD *thd,
+ const char* buffer,
+ unsigned int length)
+: m_thd(thd),
+ yylineno(1),
+ yytoklen(0),
+ yylval(NULL),
+ ptr(buffer),
+ tok_start(NULL),
+ tok_end(NULL),
+ end_of_query(buffer + length),
+ tok_start_prev(NULL),
+ buf(buffer),
+ next_state(MY_LEX_START),
+ found_semicolon(NULL),
+ ignore_space(test(thd->variables.sql_mode & MODE_IGNORE_SPACE)),
+ stmt_prepare_mode(FALSE)
+{
+}
+
+Lex_input_stream::~Lex_input_stream()
+{}
+
/*
This is called before every query that is to be parsed.
@@ -115,14 +138,12 @@ st_parsing_options::reset()
(We already do too much here)
*/
-void lex_start(THD *thd, uchar *buf,uint length)
+void lex_start(THD *thd)
{
LEX *lex= thd->lex;
DBUG_ENTER("lex_start");
lex->thd= lex->unit.thd= thd;
- lex->buf= lex->ptr= buf;
- lex->end_of_query= buf+length;
lex->context_stack.empty();
lex->unit.init_query();
@@ -152,18 +173,15 @@ void lex_start(THD *thd, uchar *buf,uint length)
lex->describe= 0;
lex->subqueries= FALSE;
lex->view_prepare_mode= FALSE;
- lex->stmt_prepare_mode= FALSE;
lex->derived_tables= 0;
lex->lock_option= TL_READ;
- lex->found_semicolon= 0;
lex->safe_to_cache_query= 1;
lex->time_zone_tables_used= 0;
lex->leaf_tables_insert= 0;
lex->parsing_options.reset();
lex->empty_field_list_on_rset= 0;
lex->select_lex.select_number= 1;
- lex->next_state=MY_LEX_START;
- lex->yylineno = 1;
+
lex->in_comment=0;
lex->length=0;
lex->select_lex.in_sum_expr=0;
@@ -175,7 +193,6 @@ void lex_start(THD *thd, uchar *buf,uint length)
lex->select_lex.udf_list.empty();
lex->current_select= &lex->select_lex;
lex->yacc_yyss=lex->yacc_yyvs=0;
- lex->ignore_space=test(thd->variables.sql_mode & MODE_IGNORE_SPACE);
lex->sql_command= lex->orig_sql_command= SQLCOM_END;
lex->duplicates= DUP_ERROR;
lex->ignore= 0;
@@ -201,22 +218,22 @@ void lex_end(LEX *lex)
}
-static int find_keyword(LEX *lex, uint len, bool function)
+static int find_keyword(Lex_input_stream *lip, uint len, bool function)
{
- uchar *tok=lex->tok_start;
+ const char *tok= lip->tok_start;
- SYMBOL *symbol = get_hash_symbol((const char *)tok,len,function);
+ SYMBOL *symbol= get_hash_symbol(tok, len, function);
if (symbol)
{
- lex->yylval->symbol.symbol=symbol;
- lex->yylval->symbol.str= (char*) tok;
- lex->yylval->symbol.length=len;
+ lip->yylval->symbol.symbol=symbol;
+ lip->yylval->symbol.str= (char*) tok;
+ lip->yylval->symbol.length=len;
if ((symbol->tok == NOT_SYM) &&
- (lex->thd->variables.sql_mode & MODE_HIGH_NOT_PRECEDENCE))
+ (lip->m_thd->variables.sql_mode & MODE_HIGH_NOT_PRECEDENCE))
return NOT2_SYM;
if ((symbol->tok == OR_OR_SYM) &&
- !(lex->thd->variables.sql_mode & MODE_PIPES_AS_CONCAT))
+ !(lip->m_thd->variables.sql_mode & MODE_PIPES_AS_CONCAT))
return OR2_SYM;
return symbol->tok;
@@ -245,12 +262,12 @@ bool is_keyword(const char *name, uint len)
/* make a copy of token before ptr and set yytoklen */
-static LEX_STRING get_token(LEX *lex,uint length)
+static LEX_STRING get_token(Lex_input_stream *lip, uint skip, uint length)
{
LEX_STRING tmp;
yyUnget(); // ptr points now after last token char
- tmp.length=lex->yytoklen=length;
- tmp.str=(char*) lex->thd->strmake((char*) lex->tok_start,tmp.length);
+ tmp.length=lip->yytoklen=length;
+ tmp.str= lip->m_thd->strmake(lip->tok_start + skip, tmp.length);
return tmp;
}
@@ -261,16 +278,19 @@ static LEX_STRING get_token(LEX *lex,uint length)
future to operate multichar strings (like ucs2)
*/
-static LEX_STRING get_quoted_token(LEX *lex,uint length, char quote)
+static LEX_STRING get_quoted_token(Lex_input_stream *lip,
+ uint skip,
+ uint length, char quote)
{
LEX_STRING tmp;
byte *from, *to, *end;
yyUnget(); // ptr points now after last token char
- tmp.length=lex->yytoklen=length;
- tmp.str=(char*) lex->thd->alloc(tmp.length+1);
- for (from= (byte*) lex->tok_start, to= (byte*) tmp.str, end= to+length ;
- to != end ;
- )
+ tmp.length=lip->yytoklen=length;
+ tmp.str=(char*) lip->m_thd->alloc(tmp.length+1);
+ from= (byte*) lip->tok_start + skip;
+ to= (byte*) tmp.str;
+ end= to+length;
+ for ( ; to != end; )
{
if ((*to++= *from++) == quote)
from++; // Skip double quotes
@@ -285,15 +305,14 @@ static LEX_STRING get_quoted_token(LEX *lex,uint length, char quote)
Fix sometimes to do only one scan of the string
*/
-static char *get_text(LEX *lex)
+static char *get_text(Lex_input_stream *lip)
{
reg1 uchar c,sep;
uint found_escape=0;
- CHARSET_INFO *cs= lex->thd->charset();
+ CHARSET_INFO *cs= lip->m_thd->charset();
sep= yyGetLast(); // String should end with this
- //lex->tok_start=lex->ptr-1; // Remember '
- while (lex->ptr != lex->end_of_query)
+ while (lip->ptr != lip->end_of_query)
{
c = yyGet();
#ifdef USE_MB
@@ -301,18 +320,18 @@ static char *get_text(LEX *lex)
int l;
if (use_mb(cs) &&
(l = my_ismbchar(cs,
- (const char *)lex->ptr-1,
- (const char *)lex->end_of_query))) {
- lex->ptr += l-1;
+ lip->ptr-1,
+ lip->end_of_query))) {
+ lip->ptr += l-1;
continue;
}
}
#endif
if (c == '\\' &&
- !(lex->thd->variables.sql_mode & MODE_NO_BACKSLASH_ESCAPES))
+ !(lip->m_thd->variables.sql_mode & MODE_NO_BACKSLASH_ESCAPES))
{ // Escaped character
found_escape=1;
- if (lex->ptr == lex->end_of_query)
+ if (lip->ptr == lip->end_of_query)
return 0;
yySkip();
}
@@ -327,21 +346,23 @@ static char *get_text(LEX *lex)
yyUnget();
/* Found end. Unescape and return string */
- uchar *str,*end,*start;
+ const char *str;
+ const char *end;
+ char *start;
- str=lex->tok_start+1;
- end=lex->ptr-1;
- if (!(start=(uchar*) lex->thd->alloc((uint) (end-str)+1)))
+ str=lip->tok_start+1;
+ end=lip->ptr-1;
+ if (!(start=(char*) lip->m_thd->alloc((uint) (end-str)+1)))
return (char*) ""; // Sql_alloc has set error flag
if (!found_escape)
{
- lex->yytoklen=(uint) (end-str);
- memcpy(start,str,lex->yytoklen);
- start[lex->yytoklen]=0;
+ lip->yytoklen=(uint) (end-str);
+ memcpy(start,str,lip->yytoklen);
+ start[lip->yytoklen]=0;
}
else
{
- uchar *to;
+ char *to;
for (to=start ; str != end ; str++)
{
@@ -356,7 +377,7 @@ static char *get_text(LEX *lex)
continue;
}
#endif
- if (!(lex->thd->variables.sql_mode & MODE_NO_BACKSLASH_ESCAPES) &&
+ if (!(lip->m_thd->variables.sql_mode & MODE_NO_BACKSLASH_ESCAPES) &&
*str == '\\' && str+1 != end)
{
switch(*++str) {
@@ -393,7 +414,7 @@ static char *get_text(LEX *lex)
*to++ = *str;
}
*to=0;
- lex->yytoklen=(uint) (to-start);
+ lip->yytoklen=(uint) (to-start);
}
return (char*) start;
}
@@ -506,20 +527,21 @@ int MYSQLlex(void *arg, void *yythd)
int tokval, result_state;
uint length;
enum my_lex_states state;
- LEX *lex= ((THD *)yythd)->lex;
+ THD *thd= (THD *)yythd;
+ Lex_input_stream *lip= thd->m_lip;
+ LEX *lex= thd->lex;
YYSTYPE *yylval=(YYSTYPE*) arg;
- CHARSET_INFO *cs= ((THD *) yythd)->charset();
+ CHARSET_INFO *cs= thd->charset();
uchar *state_map= cs->state_map;
uchar *ident_map= cs->ident_map;
- lex->yylval=yylval; // The global state
+ lip->yylval=yylval; // The global state
- lex->tok_end_prev= lex->tok_end;
- lex->tok_start_prev= lex->tok_start;
+ lip->tok_start_prev= lip->tok_start;
- lex->tok_start=lex->tok_end=lex->ptr;
- state=lex->next_state;
- lex->next_state=MY_LEX_OPERATOR_OR_IDENT;
+ lip->tok_start=lip->tok_end=lip->ptr;
+ state=lip->next_state;
+ lip->next_state=MY_LEX_OPERATOR_OR_IDENT;
LINT_INIT(c);
for (;;)
{
@@ -530,9 +552,9 @@ int MYSQLlex(void *arg, void *yythd)
for (c=yyGet() ; (state_map[c] == MY_LEX_SKIP) ; c= yyGet())
{
if (c == '\n')
- lex->yylineno++;
+ lip->yylineno++;
}
- lex->tok_start=lex->ptr-1; // Start of real token
+ lip->tok_start=lip->ptr-1; // Start of real token
state= (enum my_lex_states) state_map[c];
break;
case MY_LEX_ESCAPE:
@@ -551,20 +573,20 @@ int MYSQLlex(void *arg, void *yythd)
state=MY_LEX_COMMENT;
break;
}
- yylval->lex_str.str=(char*) (lex->ptr=lex->tok_start);// Set to first chr
+ yylval->lex_str.str=(char*) (lip->ptr=lip->tok_start);// Set to first chr
yylval->lex_str.length=1;
c=yyGet();
if (c != ')')
- lex->next_state= MY_LEX_START; // Allow signed numbers
+ lip->next_state= MY_LEX_START; // Allow signed numbers
if (c == ',')
- lex->tok_start=lex->ptr; // Let tok_start point at next item
+ lip->tok_start=lip->ptr; // Let tok_start point at next item
/*
Check for a placeholder: it should not precede a possible identifier
because of binlogging: when a placeholder is replaced with
its value in a query for the binlog, the query must stay
grammatically correct.
*/
- else if (c == '?' && lex->stmt_prepare_mode && !ident_map[yyPeek()])
+ else if (c == '?' && lip->stmt_prepare_mode && !ident_map[yyPeek()])
return(PARAM_MARKER);
return((int) c);
@@ -575,14 +597,14 @@ int MYSQLlex(void *arg, void *yythd)
break;
}
/* Found N'string' */
- lex->tok_start++; // Skip N
+ lip->tok_start++; // Skip N
yySkip(); // Skip '
- if (!(yylval->lex_str.str = get_text(lex)))
+ if (!(yylval->lex_str.str = get_text(lip)))
{
state= MY_LEX_CHAR; // Read char by char
break;
}
- yylval->lex_str.length= lex->yytoklen;
+ yylval->lex_str.length= lip->yytoklen;
return(NCHAR_STRING);
case MY_LEX_IDENT_OR_HEX:
@@ -598,7 +620,7 @@ int MYSQLlex(void *arg, void *yythd)
break;
}
case MY_LEX_IDENT:
- uchar *start;
+ const char *start;
#if defined(USE_MB) && defined(USE_MB_IDENT)
if (use_mb(cs))
{
@@ -606,13 +628,13 @@ int MYSQLlex(void *arg, void *yythd)
if (my_mbcharlen(cs, yyGetLast()) > 1)
{
int l = my_ismbchar(cs,
- (const char *)lex->ptr-1,
- (const char *)lex->end_of_query);
+ lip->ptr-1,
+ lip->end_of_query);
if (l == 0) {
state = MY_LEX_CHAR;
continue;
}
- lex->ptr += l - 1;
+ lip->ptr += l - 1;
}
while (ident_map[c=yyGet()])
{
@@ -620,10 +642,10 @@ int MYSQLlex(void *arg, void *yythd)
{
int l;
if ((l = my_ismbchar(cs,
- (const char *)lex->ptr-1,
- (const char *)lex->end_of_query)) == 0)
+ lip->ptr-1,
+ lip->end_of_query)) == 0)
break;
- lex->ptr += l-1;
+ lip->ptr += l-1;
}
}
}
@@ -634,9 +656,9 @@ int MYSQLlex(void *arg, void *yythd)
/* If there were non-ASCII characters, mark that we must convert */
result_state= result_state & 0x80 ? IDENT_QUOTED : IDENT;
}
- length= (uint) (lex->ptr - lex->tok_start)-1;
- start= lex->ptr;
- if (lex->ignore_space)
+ length= (uint) (lip->ptr - lip->tok_start)-1;
+ start= lip->ptr;
+ if (lip->ignore_space)
{
/*
If we find a space then this can't be an identifier. We notice this
@@ -644,19 +666,19 @@ int MYSQLlex(void *arg, void *yythd)
*/
for (; state_map[c] == MY_LEX_SKIP ; c= yyGet());
}
- if (start == lex->ptr && c == '.' && ident_map[yyPeek()])
- lex->next_state=MY_LEX_IDENT_SEP;
+ if (start == lip->ptr && c == '.' && ident_map[yyPeek()])
+ lip->next_state=MY_LEX_IDENT_SEP;
else
{ // '(' must follow directly if function
yyUnget();
- if ((tokval = find_keyword(lex,length,c == '(')))
+ if ((tokval = find_keyword(lip, length, c == '(')))
{
- lex->next_state= MY_LEX_START; // Allow signed numbers
+ lip->next_state= MY_LEX_START; // Allow signed numbers
return(tokval); // Was keyword
}
yySkip(); // next state does a unget
}
- yylval->lex_str=get_token(lex,length);
+ yylval->lex_str=get_token(lip, 0, length);
/*
Note: "SELECT _bla AS 'alias'"
@@ -673,12 +695,12 @@ int MYSQLlex(void *arg, void *yythd)
return(result_state); // IDENT or IDENT_QUOTED
case MY_LEX_IDENT_SEP: // Found ident and now '.'
- yylval->lex_str.str=(char*) lex->ptr;
+ yylval->lex_str.str=(char*) lip->ptr;
yylval->lex_str.length=1;
c=yyGet(); // should be '.'
- lex->next_state= MY_LEX_IDENT_START;// Next is an ident (not a keyword)
+ lip->next_state= MY_LEX_IDENT_START;// Next is an ident (not a keyword)
if (!ident_map[yyPeek()]) // Probably ` or "
- lex->next_state= MY_LEX_START;
+ lip->next_state= MY_LEX_START;
return((int) c);
case MY_LEX_NUMBER_IDENT: // number or ident which num-start
@@ -698,36 +720,32 @@ int MYSQLlex(void *arg, void *yythd)
{
yySkip();
while (my_isdigit(cs,yyGet())) ;
- yylval->lex_str=get_token(lex,yyLength());
+ yylval->lex_str=get_token(lip, 0, yyLength());
return(FLOAT_NUM);
}
}
yyUnget(); /* purecov: inspected */
}
- else if (c == 'x' && (lex->ptr - lex->tok_start) == 2 &&
- lex->tok_start[0] == '0' )
+ else if (c == 'x' && (lip->ptr - lip->tok_start) == 2 &&
+ lip->tok_start[0] == '0' )
{ // Varbinary
while (my_isxdigit(cs,(c = yyGet()))) ;
- if ((lex->ptr - lex->tok_start) >= 4 && !ident_map[c])
+ if ((lip->ptr - lip->tok_start) >= 4 && !ident_map[c])
{
- yylval->lex_str=get_token(lex,yyLength());
- yylval->lex_str.str+=2; // Skip 0x
- yylval->lex_str.length-=2;
- lex->yytoklen-=2;
+ /* skip '0x' */
+ yylval->lex_str=get_token(lip, 2, yyLength()-2);
return (HEX_NUM);
}
yyUnget();
}
- else if (c == 'b' && (lex->ptr - lex->tok_start) == 2 &&
- lex->tok_start[0] == '0' )
+ else if (c == 'b' && (lip->ptr - lip->tok_start) == 2 &&
+ lip->tok_start[0] == '0' )
{ // b'bin-number'
while (my_isxdigit(cs,(c = yyGet()))) ;
- if ((lex->ptr - lex->tok_start) >= 4 && !ident_map[c])
+ if ((lip->ptr - lip->tok_start) >= 4 && !ident_map[c])
{
- yylval->lex_str= get_token(lex, yyLength());
- yylval->lex_str.str+= 2; // Skip 0x
- yylval->lex_str.length-= 2;
- lex->yytoklen-= 2;
+ /* Skip '0b' */
+ yylval->lex_str= get_token(lip, 2, yyLength()-2);
return (BIN_NUM);
}
yyUnget();
@@ -745,10 +763,10 @@ int MYSQLlex(void *arg, void *yythd)
{
int l;
if ((l = my_ismbchar(cs,
- (const char *)lex->ptr-1,
- (const char *)lex->end_of_query)) == 0)
+ lip->ptr-1,
+ lip->end_of_query)) == 0)
break;
- lex->ptr += l-1;
+ lip->ptr += l-1;
}
}
}
@@ -760,16 +778,15 @@ int MYSQLlex(void *arg, void *yythd)
result_state= result_state & 0x80 ? IDENT_QUOTED : IDENT;
}
if (c == '.' && ident_map[yyPeek()])
- lex->next_state=MY_LEX_IDENT_SEP;// Next is '.'
+ lip->next_state=MY_LEX_IDENT_SEP;// Next is '.'
- yylval->lex_str= get_token(lex,yyLength());
+ yylval->lex_str= get_token(lip, 0, yyLength());
return(result_state);
case MY_LEX_USER_VARIABLE_DELIMITER: // Found quote char
{
uint double_quotes= 0;
char quote_char= c; // Used char
- lex->tok_start=lex->ptr; // Skip first `
while ((c=yyGet()))
{
int var_length;
@@ -789,23 +806,24 @@ int MYSQLlex(void *arg, void *yythd)
#ifdef USE_MB
else if (var_length < 1)
break; // Error
- lex->ptr+= var_length-1;
+ lip->ptr+= var_length-1;
#endif
}
if (double_quotes)
- yylval->lex_str=get_quoted_token(lex,yyLength() - double_quotes,
+ yylval->lex_str=get_quoted_token(lip, 1,
+ yyLength() - double_quotes -1,
quote_char);
else
- yylval->lex_str=get_token(lex,yyLength());
+ yylval->lex_str=get_token(lip, 1, yyLength() -1);
if (c == quote_char)
yySkip(); // Skip end `
- lex->next_state= MY_LEX_START;
+ lip->next_state= MY_LEX_START;
return(IDENT_QUOTED);
}
- case MY_LEX_INT_OR_REAL: // Compleat int or incompleat real
+ case MY_LEX_INT_OR_REAL: // Complete int or incomplete real
if (c != '.')
{ // Found complete integer number.
- yylval->lex_str=get_token(lex,yyLength());
+ yylval->lex_str=get_token(lip, 0, yyLength());
return int_token(yylval->lex_str.str,yylval->lex_str.length);
}
// fall through
@@ -823,47 +841,45 @@ int MYSQLlex(void *arg, void *yythd)
break;
}
while (my_isdigit(cs,yyGet())) ;
- yylval->lex_str=get_token(lex,yyLength());
+ yylval->lex_str=get_token(lip, 0, yyLength());
return(FLOAT_NUM);
}
- yylval->lex_str=get_token(lex,yyLength());
+ yylval->lex_str=get_token(lip, 0, yyLength());
return(DECIMAL_NUM);
case MY_LEX_HEX_NUMBER: // Found x'hexstring'
yyGet(); // Skip '
while (my_isxdigit(cs,(c = yyGet()))) ;
- length=(lex->ptr - lex->tok_start); // Length of hexnum+3
+ length=(lip->ptr - lip->tok_start); // Length of hexnum+3
if (!(length & 1) || c != '\'')
{
return(ABORT_SYM); // Illegal hex constant
}
yyGet(); // get_token makes an unget
- yylval->lex_str=get_token(lex,length);
- yylval->lex_str.str+=2; // Skip x'
- yylval->lex_str.length-=3; // Don't count x' and last '
- lex->yytoklen-=3;
+ yylval->lex_str=get_token(lip,
+ 2, // skip x'
+ length-3); // don't count x' and last '
return (HEX_NUM);
case MY_LEX_BIN_NUMBER: // Found b'bin-string'
yyGet(); // Skip '
while ((c= yyGet()) == '0' || c == '1');
- length= (lex->ptr - lex->tok_start); // Length of bin-num + 3
+ length= (lip->ptr - lip->tok_start); // Length of bin-num + 3
if (c != '\'')
return(ABORT_SYM); // Illegal hex constant
yyGet(); // get_token makes an unget
- yylval->lex_str= get_token(lex, length);
- yylval->lex_str.str+= 2; // Skip b'
- yylval->lex_str.length-= 3; // Don't count b' and last '
- lex->yytoklen-= 3;
- return (BIN_NUM);
+ yylval->lex_str= get_token(lip,
+ 2, // skip b'
+ length-3); // don't count b' and last '
+ return (BIN_NUM);
case MY_LEX_CMP_OP: // Incomplete comparison operator
if (state_map[yyPeek()] == MY_LEX_CMP_OP ||
state_map[yyPeek()] == MY_LEX_LONG_CMP_OP)
yySkip();
- if ((tokval = find_keyword(lex,(uint) (lex->ptr - lex->tok_start),0)))
+ if ((tokval = find_keyword(lip,(uint) (lip->ptr - lip->tok_start),0)))
{
- lex->next_state= MY_LEX_START; // Allow signed numbers
+ lip->next_state= MY_LEX_START; // Allow signed numbers
return(tokval);
}
state = MY_LEX_CHAR; // Something fishy found
@@ -877,9 +893,9 @@ int MYSQLlex(void *arg, void *yythd)
if (state_map[yyPeek()] == MY_LEX_CMP_OP)
yySkip();
}
- if ((tokval = find_keyword(lex,(uint) (lex->ptr - lex->tok_start),0)))
+ if ((tokval = find_keyword(lip,(uint) (lip->ptr - lip->tok_start),0)))
{
- lex->next_state= MY_LEX_START; // Found long op
+ lip->next_state= MY_LEX_START; // Found long op
return(tokval);
}
state = MY_LEX_CHAR; // Something fishy found
@@ -892,24 +908,24 @@ int MYSQLlex(void *arg, void *yythd)
break;
}
yySkip();
- tokval = find_keyword(lex,2,0); // Is a bool operator
- lex->next_state= MY_LEX_START; // Allow signed numbers
+ tokval = find_keyword(lip,2,0); // Is a bool operator
+ lip->next_state= MY_LEX_START; // Allow signed numbers
return(tokval);
case MY_LEX_STRING_OR_DELIMITER:
- if (((THD *) yythd)->variables.sql_mode & MODE_ANSI_QUOTES)
+ if (thd->variables.sql_mode & MODE_ANSI_QUOTES)
{
state= MY_LEX_USER_VARIABLE_DELIMITER;
break;
}
/* " used for strings */
case MY_LEX_STRING: // Incomplete text string
- if (!(yylval->lex_str.str = get_text(lex)))
+ if (!(yylval->lex_str.str = get_text(lip)))
{
state= MY_LEX_CHAR; // Read char by char
break;
}
- yylval->lex_str.length=lex->yytoklen;
+ yylval->lex_str.length=lip->yytoklen;
return(TEXT_STRING);
case MY_LEX_COMMENT: // Comment
@@ -933,7 +949,7 @@ int MYSQLlex(void *arg, void *yythd)
state=MY_LEX_START;
if (my_isdigit(cs,yyPeek()))
{ // Version number
- version=strtol((char*) lex->ptr,(char**) &lex->ptr,10);
+ version=strtol((char*) lip->ptr,(char**) &lip->ptr,10);
}
if (version <= MYSQL_VERSION_ID)
{
@@ -941,13 +957,13 @@ int MYSQLlex(void *arg, void *yythd)
break;
}
}
- while (lex->ptr != lex->end_of_query &&
+ while (lip->ptr != lip->end_of_query &&
((c=yyGet()) != '*' || yyPeek() != '/'))
{
if (c == '\n')
- lex->yylineno++;
+ lip->yylineno++;
}
- if (lex->ptr != lex->end_of_query)
+ if (lip->ptr != lip->end_of_query)
yySkip(); // remove last '/'
state = MY_LEX_START; // Try again
break;
@@ -972,14 +988,13 @@ int MYSQLlex(void *arg, void *yythd)
case MY_LEX_SEMICOLON: // optional line terminator
if (yyPeek())
{
- THD* thd= (THD*)yythd;
if ((thd->client_capabilities & CLIENT_MULTI_STATEMENTS) &&
- !lex->stmt_prepare_mode)
+ !lip->stmt_prepare_mode)
{
lex->safe_to_cache_query= 0;
- lex->found_semicolon=(char*) lex->ptr;
+ lip->found_semicolon= lip->ptr;
thd->server_status|= SERVER_MORE_RESULTS_EXISTS;
- lex->next_state= MY_LEX_END;
+ lip->next_state= MY_LEX_END;
return (END_OF_INPUT);
}
state= MY_LEX_CHAR; // Return ';'
@@ -987,15 +1002,15 @@ int MYSQLlex(void *arg, void *yythd)
}
/* fall true */
case MY_LEX_EOL:
- if (lex->ptr >= lex->end_of_query)
+ if (lip->ptr >= lip->end_of_query)
{
- lex->next_state=MY_LEX_END; // Mark for next loop
+ lip->next_state=MY_LEX_END; // Mark for next loop
return(END_OF_INPUT);
}
state=MY_LEX_CHAR;
break;
case MY_LEX_END:
- lex->next_state=MY_LEX_END;
+ lip->next_state=MY_LEX_END;
return(0); // We found end of input last time
/* Actually real shouldn't start with . but allow them anyhow */
@@ -1015,26 +1030,26 @@ int MYSQLlex(void *arg, void *yythd)
case MY_LEX_STRING_OR_DELIMITER:
break;
case MY_LEX_USER_END:
- lex->next_state=MY_LEX_SYSTEM_VAR;
+ lip->next_state=MY_LEX_SYSTEM_VAR;
break;
default:
- lex->next_state=MY_LEX_HOSTNAME;
+ lip->next_state=MY_LEX_HOSTNAME;
break;
}
- yylval->lex_str.str=(char*) lex->ptr;
+ yylval->lex_str.str=(char*) lip->ptr;
yylval->lex_str.length=1;
return((int) '@');
case MY_LEX_HOSTNAME: // end '@' of user@hostname
for (c=yyGet() ;
my_isalnum(cs,c) || c == '.' || c == '_' || c == '$';
c= yyGet()) ;
- yylval->lex_str=get_token(lex,yyLength());
+ yylval->lex_str=get_token(lip, 0, yyLength());
return(LEX_HOSTNAME);
case MY_LEX_SYSTEM_VAR:
- yylval->lex_str.str=(char*) lex->ptr;
+ yylval->lex_str.str=(char*) lip->ptr;
yylval->lex_str.length=1;
yySkip(); // Skip '@'
- lex->next_state= (state_map[yyPeek()] ==
+ lip->next_state= (state_map[yyPeek()] ==
MY_LEX_USER_VARIABLE_DELIMITER ?
MY_LEX_OPERATOR_OR_IDENT :
MY_LEX_IDENT_OR_KEYWORD);
@@ -1051,16 +1066,16 @@ int MYSQLlex(void *arg, void *yythd)
result_state= result_state & 0x80 ? IDENT_QUOTED : IDENT;
if (c == '.')
- lex->next_state=MY_LEX_IDENT_SEP;
- length= (uint) (lex->ptr - lex->tok_start)-1;
+ lip->next_state=MY_LEX_IDENT_SEP;
+ length= (uint) (lip->ptr - lip->tok_start)-1;
if (length == 0)
return(ABORT_SYM); // Names must be nonempty.
- if ((tokval= find_keyword(lex,length,0)))
+ if ((tokval= find_keyword(lip, length,0)))
{
yyUnget(); // Put back 'c'
return(tokval); // Was keyword
}
- yylval->lex_str=get_token(lex,length);
+ yylval->lex_str=get_token(lip, 0, length);
return(result_state);
}
}
@@ -1093,7 +1108,7 @@ Alter_info::Alter_info(const Alter_info &rhs, MEM_ROOT *mem_root)
Pointer to the last non-comment symbol of the statement.
*/
-uchar *skip_rear_comments(uchar *begin, uchar *end)
+char *skip_rear_comments(char *begin, char *end)
{
while (begin < end && (end[-1] <= ' ' || end[-1] == '*' ||
end[-1] == '/' || end[-1] == ';'))
diff --git a/sql/sql_lex.h b/sql/sql_lex.h
index 2ff29d684d1..6c9283126c4 100644
--- a/sql/sql_lex.h
+++ b/sql/sql_lex.h
@@ -470,7 +470,7 @@ public:
void set_thd(THD *thd_arg) { thd= thd_arg; }
inline bool is_union ();
- friend void lex_start(THD *thd, uchar *buf, uint length);
+ friend void lex_start(THD *thd);
friend int subselect_union_engine::exec();
List<Item> *get_unit_column_types();
@@ -676,7 +676,7 @@ public:
void cut_subtree() { slave= 0; }
bool test_limit();
- friend void lex_start(THD *thd, uchar *buf, uint length);
+ friend void lex_start(THD *thd);
st_select_lex() : n_sum_items(0), n_child_sum_items(0) {}
void make_empty_select()
{
@@ -886,6 +886,12 @@ public:
query_tables_own_last= 0;
}
}
+ /**
+ true if the parsed tree contains references to stored procedures
+ or functions, false otherwise
+ */
+ bool uses_stored_routines() const
+ { return sroutines_list.elements != 0; }
};
@@ -906,30 +912,78 @@ struct st_parsing_options
};
+/**
+ This class represents the character input stream consumed during
+ lexical analysis.
+*/
+class Lex_input_stream
+{
+public:
+ Lex_input_stream(THD *thd, const char* buff, unsigned int length);
+ ~Lex_input_stream();
+
+ /** Current thread. */
+ THD *m_thd;
+
+ /** Current line number. */
+ uint yylineno;
+
+ /** Length of the last token parsed. */
+ uint yytoklen;
+
+ /** Interface with bison, value of the last token parsed. */
+ LEX_YYSTYPE yylval;
+
+ /** Pointer to the current position in the input stream. */
+ const char* ptr;
+
+ /** Starting position of the last token parsed. */
+ const char* tok_start;
+
+ /** Ending position of the last token parsed. */
+ const char* tok_end;
+
+ /** End of the query text in the input stream. */
+ const char* end_of_query;
+
+ /** Starting position of the previous token parsed. */
+ const char* tok_start_prev;
+
+ /** Begining of the query text in the input stream. */
+ const char* buf;
+
+ /** Current state of the lexical analyser. */
+ enum my_lex_states next_state;
+
+ /** Position of ';' in the stream, to delimit multiple queries. */
+ const char* found_semicolon;
+
+ /** SQL_MODE = IGNORE_SPACE. */
+ bool ignore_space;
+ /*
+ TRUE if we're parsing a prepared statement: in this mode
+ we should allow placeholders and disallow multi-statements.
+ */
+ bool stmt_prepare_mode;
+};
+
+
/* The state of the lex parsing. This is saved in the THD struct */
typedef struct st_lex : public Query_tables_list
{
- uint yylineno,yytoklen; /* Simulate lex */
- LEX_YYSTYPE yylval;
SELECT_LEX_UNIT unit; /* most upper unit */
SELECT_LEX select_lex; /* first SELECT_LEX */
/* current SELECT_LEX in parsing */
SELECT_LEX *current_select;
/* list of all SELECT_LEX */
SELECT_LEX *all_selects_list;
- uchar *buf; /* The beginning of string, used by SPs */
- uchar *ptr,*tok_start,*tok_end,*end_of_query;
-
- /* The values of tok_start/tok_end as they were one call of MYSQLlex before */
- uchar *tok_start_prev, *tok_end_prev;
char *length,*dec,*change,*name;
char *help_arg;
char *backup_dir; /* For RESTORE/BACKUP */
char* to_log; /* For PURGE MASTER LOGS TO */
char* x509_subject,*x509_issuer,*ssl_cipher;
- char* found_semicolon; /* For multi queries - next query */
String *wild;
sql_exchange *exchange;
select_result *result;
@@ -998,7 +1052,6 @@ typedef struct st_lex : public Query_tables_list
enum_sql_command sql_command, orig_sql_command;
thr_lock_type lock_option;
enum SSL_type ssl_type; /* defined in violite.h */
- enum my_lex_states next_state;
enum enum_duplicates duplicates;
enum enum_tx_isolation tx_isolation;
enum enum_ha_read_modes ha_read_mode;
@@ -1030,7 +1083,7 @@ typedef struct st_lex : public Query_tables_list
uint8 create_view_algorithm;
uint8 create_view_check;
bool drop_if_exists, drop_temporary, local_file, one_shot_set;
- bool in_comment, ignore_space, verbose, no_write_to_binlog;
+ bool in_comment, verbose, no_write_to_binlog;
bool tx_chain, tx_release;
/*
Special JOIN::prepare mode: changing of query is prohibited.
@@ -1040,11 +1093,6 @@ typedef struct st_lex : public Query_tables_list
to an .frm file. We need this definition to stay untouched.
*/
bool view_prepare_mode;
- /*
- TRUE if we're parsing a prepared statement: in this mode
- we should allow placeholders and disallow multistatements.
- */
- bool stmt_prepare_mode;
bool safe_to_cache_query;
bool subqueries, ignore;
st_parsing_options parsing_options;
@@ -1109,8 +1157,9 @@ typedef struct st_lex : public Query_tables_list
Pointers to part of LOAD DATA statement that should be rewritten
during replication ("LOCAL 'filename' REPLACE INTO" part).
*/
- uchar *fname_start, *fname_end;
-
+ const char *fname_start;
+ const char *fname_end;
+
bool escape_used;
st_lex();
@@ -1219,7 +1268,7 @@ struct st_lex_local: public st_lex
extern void lex_init(void);
extern void lex_free(void);
-extern void lex_start(THD *thd, uchar *buf,uint length);
+extern void lex_start(THD *thd);
extern void lex_end(LEX *lex);
extern int MYSQLlex(void *arg, void *yythd);
-extern uchar *skip_rear_comments(uchar *begin, uchar *end);
+extern char *skip_rear_comments(char *begin, char *end);
diff --git a/sql/sql_parse.cc b/sql/sql_parse.cc
index 3ca0c78d96a..7e58b36a939 100644
--- a/sql/sql_parse.cc
+++ b/sql/sql_parse.cc
@@ -1238,6 +1238,7 @@ pthread_handler_t handle_bootstrap(void *arg)
THD *thd=(THD*) arg;
FILE *file=bootstrap_file;
char *buff;
+ const char* found_semicolon= NULL;
/* The following must be called before DBUG_ENTER */
thd->thread_stack= (char*) &thd;
@@ -1314,7 +1315,7 @@ pthread_handler_t handle_bootstrap(void *arg)
*/
thd->query_id=next_query_id();
thd->set_time();
- mysql_parse(thd,thd->query,length);
+ mysql_parse(thd, thd->query, length, & found_semicolon);
close_thread_tables(thd); // Free tables
if (thd->is_fatal_error)
@@ -1793,17 +1794,19 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
char *packet_end= thd->query + thd->query_length;
/* 'b' stands for 'buffer' parameter', special for 'my_snprintf' */
const char *format= "%.*b";
+ const char* found_semicolon= NULL;
+
mysql_log.write(thd,command, format, thd->query_length, thd->query);
DBUG_PRINT("query",("%-.4096s",thd->query));
if (!(specialflag & SPECIAL_NO_PRIOR))
my_pthread_setprio(pthread_self(),QUERY_PRIOR);
- mysql_parse(thd,thd->query, thd->query_length);
+ mysql_parse(thd, thd->query, thd->query_length, & found_semicolon);
- while (!thd->killed && thd->lex->found_semicolon && !thd->net.report_error)
+ while (!thd->killed && found_semicolon && !thd->net.report_error)
{
- char *next_packet= thd->lex->found_semicolon;
+ char *next_packet= (char*) found_semicolon;
net->no_send_error= 0;
/*
Multiple queries exits, execute them individually
@@ -1828,7 +1831,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
thd->set_time(); /* Reset the query start time. */
/* TODO: set thd->lex->sql_command to SQLCOM_END here */
VOID(pthread_mutex_unlock(&LOCK_thread_count));
- mysql_parse(thd, next_packet, length);
+ mysql_parse(thd, next_packet, length, & found_semicolon);
}
if (!(specialflag & SPECIAL_NO_PRIOR))
@@ -1849,7 +1852,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
LEX_STRING conv_name;
/* used as fields initializator */
- lex_start(thd, 0, 0);
+ lex_start(thd);
statistic_increment(thd->status_var.com_stat[SQLCOM_SHOW_FIELDS],
&LOCK_status);
@@ -1886,7 +1889,10 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
break;
/* init structures for VIEW processing */
table_list.select_lex= &(thd->lex->select_lex);
- mysql_init_query(thd, (uchar*)"", 0);
+
+ lex_start(thd);
+ mysql_reset_thd_for_next_command(thd);
+
thd->lex->
select_lex.table_list.link_in_list((byte*) &table_list,
(byte**) &table_list.next_local);
@@ -3008,7 +3014,13 @@ mysql_execute_command(THD *thd)
select_lex->options|= SELECT_NO_UNLOCK;
unit->set_limit(select_lex);
- if (!(res= open_and_lock_tables(thd, select_tables)))
+ if (!(lex->create_info.options & HA_LEX_CREATE_TMP_TABLE))
+ {
+ lex->link_first_table_back(create_table, link_to_local);
+ create_table->create= TRUE;
+ }
+
+ if (!(res= open_and_lock_tables(thd, lex->query_tables)))
{
/*
Is table which we are changing used somewhere in other parts
@@ -3017,6 +3029,7 @@ mysql_execute_command(THD *thd)
if (!(create_info.options & HA_LEX_CREATE_TMP_TABLE))
{
TABLE_LIST *duplicate;
+ create_table= lex->unlink_first_table(&link_to_local);
if ((duplicate= unique_table(thd, create_table, select_tables, 0)))
{
update_non_unique_table_error(create_table, "CREATE", duplicate);
@@ -3060,6 +3073,9 @@ mysql_execute_command(THD *thd)
delete sel_result;
}
}
+ else if (!(lex->create_info.options & HA_LEX_CREATE_TMP_TABLE))
+ create_table= lex->unlink_first_table(&link_to_local);
+
}
else
{
@@ -5775,20 +5791,6 @@ bool my_yyoverflow(short **yyss, YYSTYPE **yyvs, ulong *yystacksize)
}
-/****************************************************************************
- Initialize global thd variables needed for query
-****************************************************************************/
-
-void
-mysql_init_query(THD *thd, uchar *buf, uint length)
-{
- DBUG_ENTER("mysql_init_query");
- lex_start(thd, buf, length);
- mysql_reset_thd_for_next_command(thd);
- DBUG_VOID_RETURN;
-}
-
-
/*
Reset THD part responsible for command processing state.
@@ -5975,21 +5977,55 @@ void mysql_init_multi_delete(LEX *lex)
mysql_test_parse_for_slave() in this same file.
*/
-void mysql_parse(THD *thd, char *inBuf, uint length)
+/**
+ Parse a query.
+ @param thd Current thread
+ @param inBuf Begining of the query text
+ @param length Length of the query text
+ @param [out] semicolon For multi queries, position of the character of
+ the next query in the query text.
+*/
+
+void mysql_parse(THD *thd, const char *inBuf, uint length,
+ const char ** found_semicolon)
{
DBUG_ENTER("mysql_parse");
DBUG_EXECUTE_IF("parser_debug", turn_parser_debug_on(););
- mysql_init_query(thd, (uchar*) inBuf, length);
- if (query_cache_send_result_to_client(thd, inBuf, length) <= 0)
+ /*
+ Warning.
+ The purpose of query_cache_send_result_to_client() is to lookup the
+ query in the query cache first, to avoid parsing and executing it.
+ So, the natural implementation would be to:
+ - first, call query_cache_send_result_to_client,
+ - second, if caching failed, initialise the lexical and syntactic parser.
+ The problem is that the query cache depends on a clean initialization
+ of (among others) lex->safe_to_cache_query and thd->server_status,
+ which are reset respectively in
+ - lex_start()
+ - mysql_reset_thd_for_next_command()
+ So, initializing the lexical analyser *before* using the query cache
+ is required for the cache to work properly.
+ FIXME: cleanup the dependencies in the code to simplify this.
+ */
+ lex_start(thd);
+ mysql_reset_thd_for_next_command(thd);
+
+ if (query_cache_send_result_to_client(thd, (char*) inBuf, length) <= 0)
{
LEX *lex= thd->lex;
-
+
sp_cache_flush_obsolete(&thd->sp_proc_cache);
sp_cache_flush_obsolete(&thd->sp_func_cache);
-
- if (!MYSQLparse((void *)thd) && ! thd->is_fatal_error)
+
+ Lex_input_stream lip(thd, inBuf, length);
+ thd->m_lip= &lip;
+
+ int err= MYSQLparse(thd);
+ *found_semicolon= lip.found_semicolon;
+
+ if (!err && ! thd->is_fatal_error)
{
#ifndef NO_EMBEDDED_ACCESS_CHECKS
if (mqh_used && thd->user_connect &&
@@ -6012,8 +6048,8 @@ void mysql_parse(THD *thd, char *inBuf, uint length)
PROCESSLIST.
Note that we don't need LOCK_thread_count to modify query_length.
*/
- if (lex->found_semicolon &&
- (thd->query_length= (ulong)(lex->found_semicolon - thd->query)))
+ if (lip.found_semicolon &&
+ (thd->query_length= (ulong)(lip.found_semicolon - thd->query)))
thd->query_length--;
/* Actually execute the query */
mysql_execute_command(thd);
@@ -6040,6 +6076,12 @@ void mysql_parse(THD *thd, char *inBuf, uint length)
thd->cleanup_after_query();
DBUG_ASSERT(thd->change_list.is_empty());
}
+ else
+ {
+ /* There are no multi queries in the cache. */
+ *found_semicolon= NULL;
+ }
+
DBUG_VOID_RETURN;
}
@@ -6060,8 +6102,13 @@ bool mysql_test_parse_for_slave(THD *thd, char *inBuf, uint length)
bool error= 0;
DBUG_ENTER("mysql_test_parse_for_slave");
- mysql_init_query(thd, (uchar*) inBuf, length);
- if (!MYSQLparse((void*) thd) && ! thd->is_fatal_error &&
+ Lex_input_stream lip(thd, inBuf, length);
+ thd->m_lip= &lip;
+ lex_start(thd);
+ mysql_reset_thd_for_next_command(thd);
+ int err= MYSQLparse((void*) thd);
+
+ if (!err && ! thd->is_fatal_error &&
all_tables_not_ok(thd,(TABLE_LIST*) lex->select_lex.table_list.first))
error= 1; /* Ignore question */
thd->end_statement();
@@ -7120,8 +7167,9 @@ bool check_simple_select()
if (lex->current_select != &lex->select_lex)
{
char command[80];
- strmake(command, lex->yylval->symbol.str,
- min(lex->yylval->symbol.length, sizeof(command)-1));
+ Lex_input_stream *lip= thd->m_lip;
+ strmake(command, lip->yylval->symbol.str,
+ min(lip->yylval->symbol.length, sizeof(command)-1));
my_error(ER_CANT_USE_OPTION_HERE, MYF(0), command);
return 1;
}
diff --git a/sql/sql_prepare.cc b/sql/sql_prepare.cc
index 90361f8ff0d..42655608196 100644
--- a/sql/sql_prepare.cc
+++ b/sql/sql_prepare.cc
@@ -1492,8 +1492,21 @@ static bool mysql_test_create_table(Prepared_statement *stmt)
if (select_lex->item_list.elements)
{
+ if (!(lex->create_info.options & HA_LEX_CREATE_TMP_TABLE))
+ {
+ lex->link_first_table_back(create_table, link_to_local);
+ create_table->create= TRUE;
+ }
+
+ if (open_and_lock_tables(stmt->thd, lex->query_tables))
+ DBUG_RETURN(TRUE);
+
+ if (!(lex->create_info.options & HA_LEX_CREATE_TMP_TABLE))
+ create_table= lex->unlink_first_table(&link_to_local);
+
select_lex->context.resolve_in_select_list= TRUE;
- res= select_like_stmt_test_with_open_n_lock(stmt, tables, 0, 0);
+
+ res= select_like_stmt_test(stmt, 0, 0);
}
/* put tables back for PS rexecuting */
@@ -1763,6 +1776,9 @@ static bool check_prepared_statement(Prepared_statement *stmt,
case SQLCOM_OPTIMIZE:
break;
+ case SQLCOM_PREPARE:
+ case SQLCOM_EXECUTE:
+ case SQLCOM_DEALLOCATE_PREPARE:
default:
/* All other statements are not supported yet. */
my_message(ER_UNSUPPORTED_PS, ER(ER_UNSUPPORTED_PS), MYF(0));
@@ -2800,11 +2816,15 @@ bool Prepared_statement::prepare(const char *packet, uint packet_len)
old_stmt_arena= thd->stmt_arena;
thd->stmt_arena= this;
- lex_start(thd, (uchar*) thd->query, thd->query_length);
+
+ Lex_input_stream lip(thd, thd->query, thd->query_length);
+ lip.stmt_prepare_mode= TRUE;
+ thd->m_lip= &lip;
+ lex_start(thd);
lex->safe_to_cache_query= FALSE;
- lex->stmt_prepare_mode= TRUE;
+ int err= MYSQLparse((void *)thd);
- error= MYSQLparse((void *)thd) || thd->is_fatal_error ||
+ error= err || thd->is_fatal_error ||
thd->net.report_error || init_param_array(this);
/*
diff --git a/sql/sql_table.cc b/sql/sql_table.cc
index 42d59a10712..a8ed2a53601 100644
--- a/sql/sql_table.cc
+++ b/sql/sql_table.cc
@@ -37,7 +37,8 @@ static int copy_data_between_tables(TABLE *from,TABLE *to,
List<create_field> &create, bool ignore,
uint order_num, ORDER *order,
ha_rows *copied,ha_rows *deleted,
- enum enum_enable_or_disable keys_onoff);
+ enum enum_enable_or_disable keys_onoff,
+ bool error_if_not_empty);
static bool prepare_blob_field(THD *thd, create_field *sql_field);
static bool check_engine(THD *thd, const char *table_name,
@@ -62,8 +63,8 @@ static void set_tmp_file_path(char *buf, size_t bufsize, THD *thd);
# Size of path
*/
-static uint build_table_path(char *buff, size_t bufflen, const char *db,
- const char *table, const char *ext)
+uint build_table_path(char *buff, size_t bufflen, const char *db,
+ const char *table, const char *ext)
{
strxnmov(buff, bufflen-1, mysql_data_home, "/", db, "/", table, ext,
NullS);
@@ -1722,7 +1723,14 @@ bool mysql_create_table(THD *thd,const char *db, const char *table_name,
VOID(pthread_mutex_lock(&LOCK_open));
if (!internal_tmp_table && !(create_info->options & HA_LEX_CREATE_TMP_TABLE))
{
- if (!access(path,F_OK))
+ /*
+ Inspecting table cache for placeholders created by concurrent
+ CREATE TABLE ... SELECT statements to avoid interfering with them
+ is 5.0-only solution. Starting from 5.1 we solve this problem by
+ obtaining name-lock on the table to be created first.
+ */
+ if (table_cache_has_open_placeholder(thd, db, table_name) ||
+ !access(path, F_OK))
{
if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS)
goto warn;
@@ -2051,7 +2059,7 @@ static int prepare_for_restore(THD* thd, TABLE_LIST* table,
to finish the restore in the handler later on
*/
pthread_mutex_lock(&LOCK_open);
- if (reopen_name_locked_table(thd, table))
+ if (reopen_name_locked_table(thd, table, TRUE))
{
unlock_table_name(thd, table);
pthread_mutex_unlock(&LOCK_open);
@@ -2158,7 +2166,7 @@ static int prepare_for_repair(THD* thd, TABLE_LIST *table_list,
to finish the repair in the handler later on.
*/
pthread_mutex_lock(&LOCK_open);
- if (reopen_name_locked_table(thd, table_list))
+ if (reopen_name_locked_table(thd, table_list, TRUE))
{
unlock_table_name(thd, table_list);
pthread_mutex_unlock(&LOCK_open);
@@ -2803,10 +2811,24 @@ bool mysql_create_like_table(THD* thd, TABLE_LIST* table,
}
else
{
+ bool exists;
strxmov(dst_path, mysql_data_home, "/", db, "/", table_name,
reg_ext, NullS);
fn_format(dst_path, dst_path, "", "", MYF(MY_UNPACK_FILENAME));
- if (!access(dst_path, F_OK))
+
+ /*
+ Note that this critical section should actually cover most
+ of mysql_create_like_table() function. See bugs #18950 and
+ #23667 for more information.
+ Also note that starting from 5.1 we obtain name-lock on
+ target table instead of inspecting table cache for presence
+ of open placeholders (see comment in mysql_create_table()).
+ */
+ pthread_mutex_lock(&LOCK_open);
+ exists= (table_cache_has_open_placeholder(thd, db, table_name) ||
+ !access(dst_path, F_OK));
+ pthread_mutex_unlock(&LOCK_open);
+ if (exists)
goto table_exists;
}
@@ -3056,6 +3078,16 @@ bool mysql_alter_table(THD *thd,char *new_db, char *new_name,
bool need_copy_table;
bool no_table_reopen= FALSE, varchar= FALSE;
frm_type_enum frm_type;
+ /*
+ Throw an error if the table to be altered isn't empty.
+ Used in DATE/DATETIME fields default value checking.
+ */
+ bool error_if_not_empty= FALSE;
+ /*
+ A field used for error reporting in DATE/DATETIME fields default
+ value checking.
+ */
+ create_field *new_datetime_field= 0;
DBUG_ENTER("mysql_alter_table");
thd->proc_info="init";
@@ -3160,9 +3192,14 @@ view_err:
else
{
char dir_buff[FN_REFLEN];
+ bool exists;
strxnmov(dir_buff, FN_REFLEN, mysql_real_data_home, new_db, NullS);
- if (!access(fn_format(new_name_buff,new_name_buff,dir_buff,reg_ext,0),
- F_OK))
+ VOID(pthread_mutex_lock(&LOCK_open));
+ exists= (table_cache_has_open_placeholder(thd, new_db, new_name) ||
+ !access(fn_format(new_name_buff, new_name_buff, dir_buff,
+ reg_ext, 0), F_OK));
+ VOID(pthread_mutex_unlock(&LOCK_open));
+ if (exists)
{
/* Table will be closed in do_command() */
my_error(ER_TABLE_EXISTS_ERROR, MYF(0), new_alias);
@@ -3247,8 +3284,22 @@ view_err:
if (!error && (new_name != table_name || new_db != db))
{
thd->proc_info="rename";
- /* Then do a 'simple' rename of the table */
- if (!access(new_name_buff,F_OK))
+ /*
+ Then do a 'simple' rename of the table. First we need to close all
+ instances of 'source' table.
+ */
+ close_cached_table(thd, table);
+ /*
+ Then, we want check once again that target table does not exist.
+ Note that we can't fully rely on results of previous check since
+ no lock was taken on target table during it. We also can't do this
+ before calling close_cached_table() as the latter temporarily
+ releases LOCK_open mutex.
+ Also note that starting from 5.1 we use approach with obtaining
+ of name-lock on target table.
+ */
+ if (table_cache_has_open_placeholder(thd, new_db, new_name) ||
+ !access(new_name_buff,F_OK))
{
my_error(ER_TABLE_EXISTS_ERROR, MYF(0), new_name);
error= -1;
@@ -3256,7 +3307,6 @@ view_err:
else
{
*fn_ext(new_name)=0;
- close_cached_table(thd, table);
if (mysql_rename_table(old_db_type,db,table_name,new_db,new_alias))
error= -1;
else if (Table_triggers_list::change_table_name(thd, db, table_name,
@@ -3406,6 +3456,22 @@ view_err:
my_error(ER_BAD_FIELD_ERROR, MYF(0), def->change, table_name);
DBUG_RETURN(TRUE);
}
+ /*
+ Check that the DATE/DATETIME not null field we are going to add is
+ either has a default value or the '0000-00-00' is allowed by the
+ set sql mode.
+ If the '0000-00-00' value isn't allowed then raise the error_if_not_empty
+ flag to allow ALTER TABLE only if the table to be altered is empty.
+ */
+ if ((def->sql_type == MYSQL_TYPE_DATE ||
+ def->sql_type == MYSQL_TYPE_NEWDATE ||
+ def->sql_type == MYSQL_TYPE_DATETIME) && !new_datetime_field &&
+ !(~def->flags & (NO_DEFAULT_VALUE_FLAG | NOT_NULL_FLAG)) &&
+ thd->variables.sql_mode & MODE_NO_ZERO_DATE)
+ {
+ new_datetime_field= def;
+ error_if_not_empty= TRUE;
+ }
if (!def->after)
new_info.create_list.push_back(def);
else if (def->after == first_keyword)
@@ -3726,7 +3792,8 @@ view_err:
new_table->next_number_field=new_table->found_next_number_field;
error= copy_data_between_tables(table, new_table, new_info.create_list,
ignore, order_num, order,
- &copied, &deleted, alter_info->keys_onoff);
+ &copied, &deleted, alter_info->keys_onoff,
+ error_if_not_empty);
}
else if (!new_table)
{
@@ -3806,17 +3873,6 @@ view_err:
current_pid, thd->thread_id);
if (lower_case_table_names)
my_casedn_str(files_charset_info, old_name);
- if (new_name != table_name || new_db != db)
- {
- if (!access(new_name_buff,F_OK))
- {
- error=1;
- my_error(ER_TABLE_EXISTS_ERROR, MYF(0), new_name_buff);
- VOID(quick_rm_table(new_db_type,new_db,tmp_name));
- VOID(pthread_mutex_unlock(&LOCK_open));
- goto err;
- }
- }
#if (!defined( __WIN__) && !defined( __EMX__) && !defined( OS2))
if (table->file->has_transactions())
@@ -3835,6 +3891,22 @@ view_err:
table->file->extra(HA_EXTRA_FORCE_REOPEN); // Don't use this file anymore
#endif
+ if (new_name != table_name || new_db != db)
+ {
+ /*
+ Check that there is no table with target name. See the
+ comment describing code for 'simple' ALTER TABLE ... RENAME.
+ */
+ if (table_cache_has_open_placeholder(thd, new_db, new_name) ||
+ !access(new_name_buff,F_OK))
+ {
+ error=1;
+ my_error(ER_TABLE_EXISTS_ERROR, MYF(0), new_name_buff);
+ VOID(quick_rm_table(new_db_type,new_db,tmp_name));
+ VOID(pthread_mutex_unlock(&LOCK_open));
+ goto err;
+ }
+ }
error=0;
if (!need_copy_table)
@@ -3955,6 +4027,37 @@ end_temporary:
DBUG_RETURN(FALSE);
err:
+ /*
+ No default value was provided for a DATE/DATETIME field, the
+ current sql_mode doesn't allow the '0000-00-00' value and
+ the table to be altered isn't empty.
+ Report error here.
+ */
+ if (error_if_not_empty && thd->row_count)
+ {
+ const char *f_val= 0;
+ enum enum_mysql_timestamp_type t_type= MYSQL_TIMESTAMP_DATE;
+ switch (new_datetime_field->sql_type)
+ {
+ case MYSQL_TYPE_DATE:
+ case MYSQL_TYPE_NEWDATE:
+ f_val= "0000-00-00";
+ t_type= MYSQL_TIMESTAMP_DATE;
+ break;
+ case MYSQL_TYPE_DATETIME:
+ f_val= "0000-00-00 00:00:00";
+ t_type= MYSQL_TIMESTAMP_DATETIME;
+ break;
+ default:
+ /* Shouldn't get here. */
+ DBUG_ASSERT(0);
+ }
+ bool save_abort_on_warning= thd->abort_on_warning;
+ thd->abort_on_warning= TRUE;
+ make_truncated_value_warning(thd, f_val, strlength(f_val), t_type,
+ new_datetime_field->field_name);
+ thd->abort_on_warning= save_abort_on_warning;
+ }
DBUG_RETURN(TRUE);
}
@@ -3966,7 +4069,8 @@ copy_data_between_tables(TABLE *from,TABLE *to,
uint order_num, ORDER *order,
ha_rows *copied,
ha_rows *deleted,
- enum enum_enable_or_disable keys_onoff)
+ enum enum_enable_or_disable keys_onoff,
+ bool error_if_not_empty)
{
int error;
Copy_field *copy,*copy_end;
@@ -4081,6 +4185,12 @@ copy_data_between_tables(TABLE *from,TABLE *to,
break;
}
thd->row_count++;
+ /* Return error if source table isn't empty. */
+ if (error_if_not_empty)
+ {
+ error= 1;
+ break;
+ }
if (to->next_number_field)
{
if (auto_increment_field_copied)
diff --git a/sql/sql_trigger.cc b/sql/sql_trigger.cc
index 55d51ad07b7..cf6db22fbcb 100644
--- a/sql/sql_trigger.cc
+++ b/sql/sql_trigger.cc
@@ -271,7 +271,7 @@ bool mysql_create_or_drop_trigger(THD *thd, TABLE_LIST *tables, bool create)
/* We also don't allow creation of triggers on views. */
tables->required_type= FRMTYPE_TABLE;
- if (reopen_name_locked_table(thd, tables))
+ if (reopen_name_locked_table(thd, tables, TRUE))
{
unlock_table_name(thd, tables);
goto end;
@@ -978,10 +978,14 @@ bool Table_triggers_list::check_n_load(THD *thd, const char *db,
LEX_STRING *trg_definer= it_definer++;
thd->variables.sql_mode= (ulong)*trg_sql_mode;
- lex_start(thd, (uchar*)trg_create_str->str, trg_create_str->length);
+ Lex_input_stream lip(thd, trg_create_str->str, trg_create_str->length);
+ thd->m_lip= &lip;
+ lex_start(thd);
thd->spcont= 0;
- if (MYSQLparse((void *)thd) || thd->is_fatal_error)
+ int err= MYSQLparse((void *)thd);
+
+ if (err || thd->is_fatal_error)
{
/* Currently sphead is always deleted in case of a parse error */
DBUG_ASSERT(lex.sphead == 0);
diff --git a/sql/sql_view.cc b/sql/sql_view.cc
index d717aea9a3e..ba367040b36 100644
--- a/sql/sql_view.cc
+++ b/sql/sql_view.cc
@@ -772,8 +772,8 @@ static int mysql_register_view(THD *thd, TABLE_LIST *view,
view->query.str= (char*)str.ptr();
view->query.length= str.length()-1; // we do not need last \0
view->source.str= thd->query + thd->lex->create_view_select_start;
- view->source.length= (char *)skip_rear_comments((uchar *)view->source.str,
- (uchar *)thd->query +
+ view->source.length= (char *)skip_rear_comments((char *)view->source.str,
+ (char *)thd->query +
thd->query_length) -
view->source.str;
view->file_version= 1;
@@ -984,10 +984,14 @@ bool mysql_make_view(THD *thd, File_parser *parser, TABLE_LIST *table,
now Lex placed in statement memory
*/
table->view= lex= thd->lex= (LEX*) new(thd->mem_root) st_lex_local;
- lex_start(thd, (uchar*)table->query.str, table->query.length);
- view_select= &lex->select_lex;
- view_select->select_number= ++thd->select_number;
+
{
+ Lex_input_stream lip(thd, table->query.str, table->query.length);
+ thd->m_lip= &lip;
+ lex_start(thd);
+ view_select= &lex->select_lex;
+ view_select->select_number= ++thd->select_number;
+
ulong save_mode= thd->variables.sql_mode;
/* switch off modes which can prevent normal parsing of VIEW
- MODE_REAL_AS_FLOAT affect only CREATE TABLE parsing
diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy
index 0bb5f6a5e25..c1da870960b 100644
--- a/sql/sql_yacc.yy
+++ b/sql/sql_yacc.yy
@@ -86,12 +86,13 @@ const LEX_STRING null_lex_str={0,0};
void my_parse_error(const char *s)
{
THD *thd= current_thd;
+ Lex_input_stream *lip= thd->m_lip;
- char *yytext= (char*) thd->lex->tok_start;
+ const char *yytext= lip->tok_start;
/* Push an error into the error stack */
my_printf_error(ER_PARSE_ERROR, ER(ER_PARSE_ERROR), MYF(0), s,
- (yytext ? (char*) yytext : ""),
- thd->lex->yylineno);
+ (yytext ? yytext : ""),
+ lip->yylineno);
}
/**
@@ -1275,11 +1276,6 @@ deallocate:
{
THD *thd=YYTHD;
LEX *lex= thd->lex;
- if (lex->stmt_prepare_mode)
- {
- my_parse_error(ER(ER_SYNTAX_ERROR));
- MYSQL_YYABORT;
- }
lex->sql_command= SQLCOM_DEALLOCATE_PREPARE;
lex->prepared_stmt_name= $3;
};
@@ -1295,11 +1291,6 @@ prepare:
{
THD *thd=YYTHD;
LEX *lex= thd->lex;
- if (lex->stmt_prepare_mode)
- {
- my_parse_error(ER(ER_SYNTAX_ERROR));
- MYSQL_YYABORT;
- }
lex->sql_command= SQLCOM_PREPARE;
lex->prepared_stmt_name= $2;
};
@@ -1325,11 +1316,6 @@ execute:
{
THD *thd=YYTHD;
LEX *lex= thd->lex;
- if (lex->stmt_prepare_mode)
- {
- my_parse_error(ER(ER_SYNTAX_ERROR));
- MYSQL_YYABORT;
- }
lex->sql_command= SQLCOM_EXECUTE;
lex->prepared_stmt_name= $2;
}
@@ -1488,9 +1474,7 @@ create:
lex->sql_command= SQLCOM_CREATE_TABLE;
if (!lex->select_lex.add_table_to_list(thd, $5, NULL,
TL_OPTION_UPDATING,
- (using_update_log ?
- TL_READ_NO_INSERT:
- TL_READ)))
+ TL_WRITE))
MYSQL_YYABORT;
lex->alter_info.reset();
lex->col_list.empty();
@@ -1619,7 +1603,9 @@ create_function_tail:
}
| '('
{
- LEX *lex= Lex;
+ THD *thd= YYTHD;
+ LEX *lex= thd->lex;
+ Lex_input_stream *lip= thd->m_lip;
sp_head *sp;
/*
@@ -1639,9 +1625,9 @@ create_function_tail:
}
/* Order is important here: new - reset - init */
sp= new sp_head();
- sp->reset_thd_mem_root(YYTHD);
+ sp->reset_thd_mem_root(thd);
sp->init(lex);
- sp->init_sp_name(YYTHD, lex->spname);
+ sp->init_sp_name(thd, lex->spname);
sp->m_type= TYPE_ENUM_FUNCTION;
lex->sphead= sp;
@@ -1650,15 +1636,17 @@ create_function_tail:
* stored procedure, otherwise yylex will chop it into pieces
* at each ';'.
*/
- sp->m_old_cmq= YYTHD->client_capabilities & CLIENT_MULTI_QUERIES;
- YYTHD->client_capabilities &= ~CLIENT_MULTI_QUERIES;
- lex->sphead->m_param_begin= lex->tok_start+1;
+ sp->m_old_cmq= thd->client_capabilities & CLIENT_MULTI_QUERIES;
+ thd->client_capabilities &= ~CLIENT_MULTI_QUERIES;
+ lex->sphead->m_param_begin= lip->tok_start+1;
}
sp_fdparam_list ')'
{
- LEX *lex= Lex;
+ THD *thd= YYTHD;
+ LEX *lex= thd->lex;
+ Lex_input_stream *lip= thd->m_lip;
- lex->sphead->m_param_end= lex->tok_start;
+ lex->sphead->m_param_end= lip->tok_start;
}
RETURNS_SYM
{
@@ -1682,10 +1670,12 @@ create_function_tail:
}
sp_c_chistics
{
- LEX *lex= Lex;
+ THD *thd= YYTHD;
+ LEX *lex= thd->lex;
+ Lex_input_stream *lip= thd->m_lip;
lex->sphead->m_chistics= &lex->sp_chistics;
- lex->sphead->m_body_begin= lex->tok_start;
+ lex->sphead->m_body_begin= lip->tok_start;
}
sp_proc_stmt
{
@@ -2233,14 +2223,18 @@ sp_opt_default:
sp_proc_stmt:
{
- LEX *lex= Lex;
+ THD *thd= YYTHD;
+ LEX *lex= thd->lex;
+ Lex_input_stream *lip= thd->m_lip;
- lex->sphead->reset_lex(YYTHD);
- lex->sphead->m_tmp_query= lex->tok_start;
+ lex->sphead->reset_lex(thd);
+ lex->sphead->m_tmp_query= lip->tok_start;
}
statement
{
- LEX *lex= Lex;
+ THD *thd= YYTHD;
+ LEX *lex= thd->lex;
+ Lex_input_stream *lip= thd->m_lip;
sp_head *sp= lex->sphead;
sp->m_flags|= sp_get_flags_for_command(lex);
@@ -2267,15 +2261,15 @@ sp_proc_stmt:
lex->tok_end otherwise.
*/
if (yychar == YYEMPTY)
- i->m_query.length= lex->ptr - sp->m_tmp_query;
+ i->m_query.length= lip->ptr - sp->m_tmp_query;
else
- i->m_query.length= lex->tok_end - sp->m_tmp_query;
- i->m_query.str= strmake_root(YYTHD->mem_root,
- (char *)sp->m_tmp_query,
+ i->m_query.length= lip->tok_end - sp->m_tmp_query;
+ i->m_query.str= strmake_root(thd->mem_root,
+ sp->m_tmp_query,
i->m_query.length);
sp->add_instr(i);
}
- sp->restore_lex(YYTHD);
+ sp->restore_lex(thd);
}
| RETURN_SYM
{ Lex->sphead->reset_lex(YYTHD); }
@@ -4428,26 +4422,36 @@ select_item_list:
select_item:
remember_name select_item2 remember_end select_alias
{
- if (add_item_to_list(YYTHD, $2))
+ THD *thd= YYTHD;
+ DBUG_ASSERT($1 < $3);
+
+ if (add_item_to_list(thd, $2))
MYSQL_YYABORT;
if ($4.str)
{
$2->is_autogenerated_name= FALSE;
$2->set_name($4.str, $4.length, system_charset_info);
}
- else if (!$2->name) {
- char *str = $1;
- if (str[-1] == '`')
- str--;
- $2->set_name(str,(uint) ($3 - str), YYTHD->charset());
+ else if (!$2->name)
+ {
+ $2->set_name($1, (uint) ($3 - $1), thd->charset());
}
};
+
remember_name:
- { $$=(char*) Lex->tok_start; };
+ {
+ THD *thd= YYTHD;
+ Lex_input_stream *lip= thd->m_lip;
+ $$= (char*) lip->tok_start;
+ };
remember_end:
- { $$=(char*) Lex->tok_end; };
+ {
+ THD *thd= YYTHD;
+ Lex_input_stream *lip= thd->m_lip;
+ $$=(char*) lip->tok_end;
+ };
select_item2:
table_wild { $$=$1; } /* table.* */
@@ -6286,12 +6290,14 @@ procedure_list2:
procedure_item:
remember_name expr
{
- LEX *lex= Lex;
- if (add_proc_to_list(lex->thd, $2))
+ THD *thd= YYTHD;
+ Lex_input_stream *lip= thd->m_lip;
+
+ if (add_proc_to_list(thd, $2))
MYSQL_YYABORT;
if (!$2->name)
- $2->set_name($1,(uint) ((char*) lex->tok_end - $1),
- YYTHD->charset());
+ $2->set_name($1,(uint) ((char*) lip->tok_end - $1),
+ thd->charset());
}
;
@@ -7331,13 +7337,16 @@ use: USE_SYM ident
load: LOAD DATA_SYM
{
- LEX *lex=Lex;
+ THD *thd= YYTHD;
+ LEX *lex= thd->lex;
+ Lex_input_stream *lip= thd->m_lip;
+
if (lex->sphead)
{
my_error(ER_SP_BADSTATEMENT, MYF(0), "LOAD DATA");
MYSQL_YYABORT;
}
- lex->fname_start= lex->ptr;
+ lex->fname_start= lip->ptr;
}
load_data
{}
@@ -7372,8 +7381,10 @@ load_data:
}
opt_duplicate INTO
{
- LEX *lex=Lex;
- lex->fname_end= lex->ptr;
+ THD *thd= YYTHD;
+ LEX *lex= thd->lex;
+ Lex_input_stream *lip= thd->m_lip;
+ lex->fname_end= lip->ptr;
}
TABLE_SYM table_ident
{
@@ -7553,15 +7564,16 @@ text_string:
param_marker:
PARAM_MARKER
{
- THD *thd=YYTHD;
+ THD *thd= YYTHD;
LEX *lex= thd->lex;
+ Lex_input_stream *lip= thd->m_lip;
Item_param *item;
if (! lex->parsing_options.allows_variable)
{
my_error(ER_VIEW_SELECT_VARIABLE, MYF(0));
MYSQL_YYABORT;
}
- item= new Item_param((uint) (lex->tok_start - (uchar *) thd->query));
+ item= new Item_param((uint) (lip->tok_start - thd->query));
if (!($$= item) || lex->param_list.push_back(item))
{
my_message(ER_OUT_OF_RESOURCES, ER(ER_OUT_OF_RESOURCES), MYF(0));
@@ -7584,8 +7596,11 @@ signed_literal:
literal:
text_literal { $$ = $1; }
| NUM_literal { $$ = $1; }
- | NULL_SYM { $$ = new Item_null();
- Lex->next_state=MY_LEX_OPERATOR_OR_IDENT;}
+ | NULL_SYM
+ {
+ $$ = new Item_null();
+ YYTHD->m_lip->next_state=MY_LEX_OPERATOR_OR_IDENT;
+ }
| FALSE_SYM { $$= new Item_int((char*) "FALSE",0,1); }
| TRUE_SYM { $$= new Item_int((char*) "TRUE",1,1); }
| HEX_NUM { $$ = new Item_hex_string($1.str, $1.length);}
@@ -7675,8 +7690,10 @@ order_ident:
simple_ident:
ident
{
+ THD *thd= YYTHD;
+ LEX *lex= thd->lex;
+ Lex_input_stream *lip= thd->m_lip;
sp_variable_t *spv;
- LEX *lex = Lex;
sp_pcontext *spc = lex->spcont;
if (spc && (spv = spc->find_variable(&$1)))
{
@@ -7689,7 +7706,7 @@ simple_ident:
Item_splocal *splocal;
splocal= new Item_splocal($1, spv->offset, spv->type,
- lex->tok_start_prev -
+ lip->tok_start_prev -
lex->sphead->m_tmp_query);
#ifndef DBUG_OFF
if (splocal)
@@ -8285,7 +8302,11 @@ option_value_list:
option_type_value:
{
- if (Lex->sphead)
+ THD *thd= YYTHD;
+ LEX *lex= thd->lex;
+ Lex_input_stream *lip= thd->m_lip;
+
+ if (lex->sphead)
{
/*
If we are in SP we want have own LEX for each assignment.
@@ -8297,9 +8318,8 @@ option_type_value:
QQ: May be we should simply prohibit group assignments in SP?
*/
- LEX *lex;
- Lex->sphead->reset_lex(YYTHD);
- lex= Lex;
+ Lex->sphead->reset_lex(thd);
+ lex= thd->lex;
/* Set new LEX as if we at start of set rule. */
lex->sql_command= SQLCOM_SET_OPTION;
@@ -8307,12 +8327,14 @@ option_type_value:
lex->option_type=OPT_SESSION;
lex->var_list.empty();
lex->one_shot_set= 0;
- lex->sphead->m_tmp_query= lex->tok_start;
+ lex->sphead->m_tmp_query= lip->tok_start;
}
}
ext_option_value
{
- LEX *lex= Lex;
+ THD *thd= YYTHD;
+ LEX *lex= thd->lex;
+ Lex_input_stream *lip= thd->m_lip;
if (lex->sphead)
{
@@ -8334,24 +8356,24 @@ option_type_value:
/*
Extract the query statement from the tokenizer. The
- end is either lex->ptr, if there was no lookahead,
- lex->tok_end otherwise.
+ end is either lip->ptr, if there was no lookahead,
+ lip->tok_end otherwise.
*/
if (yychar == YYEMPTY)
- qbuff.length= lex->ptr - sp->m_tmp_query;
+ qbuff.length= lip->ptr - sp->m_tmp_query;
else
- qbuff.length= lex->tok_end - sp->m_tmp_query;
+ qbuff.length= lip->tok_end - sp->m_tmp_query;
- if (!(qbuff.str= alloc_root(YYTHD->mem_root, qbuff.length + 5)))
+ if (!(qbuff.str= alloc_root(thd->mem_root, qbuff.length + 5)))
MYSQL_YYABORT;
- strmake(strmake(qbuff.str, "SET ", 4), (char *)sp->m_tmp_query,
+ strmake(strmake(qbuff.str, "SET ", 4), sp->m_tmp_query,
qbuff.length);
qbuff.length+= 4;
i->m_query= qbuff;
sp->add_instr(i);
}
- lex->sphead->restore_lex(YYTHD);
+ lex->sphead->restore_lex(thd);
}
};
@@ -9609,7 +9631,9 @@ trigger_tail:
TRIGGER_SYM remember_name sp_name trg_action_time trg_event
ON remember_name table_ident FOR_SYM remember_name EACH_SYM ROW_SYM
{
- LEX *lex= Lex;
+ THD *thd= YYTHD;
+ LEX *lex= thd->lex;
+ Lex_input_stream *lip= thd->m_lip;
sp_head *sp;
if (lex->sphead)
@@ -9620,9 +9644,9 @@ trigger_tail:
if (!(sp= new sp_head()))
MYSQL_YYABORT;
- sp->reset_thd_mem_root(YYTHD);
+ sp->reset_thd_mem_root(thd);
sp->init(lex);
- sp->init_sp_name(YYTHD, $3);
+ sp->init_sp_name(thd, $3);
lex->stmt_definition_begin= $2;
lex->ident.str= $7;
@@ -9636,12 +9660,12 @@ trigger_tail:
stored procedure, otherwise yylex will chop it into pieces
at each ';'.
*/
- sp->m_old_cmq= YYTHD->client_capabilities & CLIENT_MULTI_QUERIES;
- YYTHD->client_capabilities &= ~CLIENT_MULTI_QUERIES;
+ sp->m_old_cmq= thd->client_capabilities & CLIENT_MULTI_QUERIES;
+ thd->client_capabilities &= ~CLIENT_MULTI_QUERIES;
bzero((char *)&lex->sp_chistics, sizeof(st_sp_chistics));
lex->sphead->m_chistics= &lex->sp_chistics;
- lex->sphead->m_body_begin= lex->ptr;
+ lex->sphead->m_body_begin= lip->ptr;
while (my_isspace(system_charset_info, lex->sphead->m_body_begin[0]))
++lex->sphead->m_body_begin;
}
@@ -9720,24 +9744,30 @@ sp_tail:
}
'('
{
- LEX *lex= Lex;
+ THD *thd= YYTHD;
+ LEX *lex= thd->lex;
+ Lex_input_stream *lip= thd->m_lip;
- lex->sphead->m_param_begin= lex->tok_start+1;
+ lex->sphead->m_param_begin= lip->tok_start+1;
}
sp_pdparam_list
')'
{
- LEX *lex= Lex;
+ THD *thd= YYTHD;
+ LEX *lex= thd->lex;
+ Lex_input_stream *lip= thd->m_lip;
- lex->sphead->m_param_end= lex->tok_start;
+ lex->sphead->m_param_end= lip->tok_start;
bzero((char *)&lex->sp_chistics, sizeof(st_sp_chistics));
}
sp_c_chistics
{
- LEX *lex= Lex;
+ THD *thd= YYTHD;
+ LEX *lex= thd->lex;
+ Lex_input_stream *lip= thd->m_lip;
lex->sphead->m_chistics= &lex->sp_chistics;
- lex->sphead->m_body_begin= lex->tok_start;
+ lex->sphead->m_body_begin= lip->tok_start;
}
sp_proc_stmt
{
diff --git a/sql/table.h b/sql/table.h
index ebcafbd4dc7..952b575c00e 100644
--- a/sql/table.h
+++ b/sql/table.h
@@ -193,6 +193,8 @@ typedef struct st_table_share
} TABLE_SHARE;
+extern ulong refresh_version;
+
/* Information for one open table */
struct st_table {
@@ -287,7 +289,24 @@ struct st_table {
my_bool force_index;
my_bool distinct,const_table,no_rows;
my_bool key_read, no_keyread;
- my_bool locked_by_flush;
+ /*
+ Placeholder for an open table which prevents other connections
+ from taking name-locks on this table. Typically used with
+ TABLE_SHARE::version member to take an exclusive name-lock on
+ this table name -- a name lock that not only prevents other
+ threads from opening the table, but also blocks other name
+ locks. This is achieved by:
+ - setting open_placeholder to 1 - this will block other name
+ locks, as wait_for_locked_table_name will be forced to wait,
+ see table_is_used for details.
+ - setting version to 0 - this will force other threads to close
+ the instance of this table and wait (this is the same approach
+ as used for usual name locks).
+ An exclusively name-locked table currently can have no handler
+ object associated with it (db_stat is always 0), but please do
+ not rely on that.
+ */
+ my_bool open_placeholder;
my_bool locked_by_name;
my_bool fulltext_searched;
my_bool no_cache;
@@ -310,6 +329,13 @@ struct st_table {
bool fill_item_list(List<Item> *item_list) const;
void reset_item_list(List<Item> *item_list) const;
+ /* Is table open or should be treated as such by name-locking? */
+ inline bool is_name_opened() { return db_stat || open_placeholder; }
+ /*
+ Is this instance of the table should be reopen or represents a name-lock?
+ */
+ inline bool needs_reopen_or_name_lock()
+ { return s->version != refresh_version; }
};
enum enum_schema_table_state
@@ -667,6 +693,12 @@ typedef struct st_table_list
used for implicit LOCK TABLES only and won't be used in real statement.
*/
bool prelocking_placeholder;
+ /*
+ This TABLE_LIST object corresponds to the table to be created
+ so it is possible that it does not exist (used in CREATE TABLE
+ ... SELECT implementation).
+ */
+ bool create;
enum enum_schema_table_state schema_table_state;
void calc_md5(char *buffer);
@@ -674,7 +706,11 @@ typedef struct st_table_list
int view_check_option(THD *thd, bool ignore_failure);
bool setup_underlying(THD *thd);
void cleanup_items();
- bool placeholder() {return derived || view || schema_table || !table; }
+ bool placeholder()
+ {
+ return derived || view || schema_table || create && !table->db_stat ||
+ !table;
+ }
void print(THD *thd, String *str);
bool check_single_table(st_table_list **table, table_map map,
st_table_list *view);
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