diff options
Diffstat (limited to 'sql/item.h')
| -rw-r--r-- | sql/item.h | 1667 |
1 files changed, 1150 insertions, 517 deletions
diff --git a/sql/item.h b/sql/item.h index 4261ef64950..ec474b81a08 100644 --- a/sql/item.h +++ b/sql/item.h @@ -100,7 +100,10 @@ class sp_head; class Protocol; struct TABLE_LIST; void item_init(void); /* Init item functions */ +class Item_basic_value; +class Item_result_field; class Item_field; +class Item_ref; class Item_param; class user_var_entry; class JOIN; @@ -108,6 +111,7 @@ struct KEY_FIELD; struct SARGABLE_PARAM; class RANGE_OPT_PARAM; class SEL_TREE; +class With_sum_func_cache; enum precedence { LOWEST_PRECEDENCE, @@ -147,8 +151,9 @@ bool mark_unsupported_function(const char *w1, const char *w2, #define NO_EXTRACTION_FL (1 << 6) #define FULL_EXTRACTION_FL (1 << 7) -#define SUBSTITUTION_FL (1 << 8) -#define EXTRACTION_MASK (NO_EXTRACTION_FL | FULL_EXTRACTION_FL) +#define DELETION_FL (1 << 8) +#define SUBSTITUTION_FL (1 << 9) +#define EXTRACTION_MASK (NO_EXTRACTION_FL | FULL_EXTRACTION_FL | DELETION_FL) extern const char *item_empty_name; @@ -597,6 +602,7 @@ typedef bool (Item::*Item_processor) (void *arg); typedef bool (Item::*Item_analyzer) (uchar **argp); typedef Item* (Item::*Item_transformer) (THD *thd, uchar *arg); typedef void (*Cond_traverser) (const Item *item, void *arg); +typedef bool (Item::*Pushdown_checker) (uchar *arg); struct st_cond_statistic; @@ -629,6 +635,87 @@ public: String_copier_for_item(THD *thd): m_thd(thd) { } }; + +/** + A helper class describing what kind of Item created a temporary field. + - If m_field is set, then the temporary field was created from Field + (e.g. when the Item was Item_field, or Item_ref pointing to Item_field) + - If m_default_field is set, then there is a usable DEFAULT value. + (e.g. when the Item is Item_field) + - If m_item_result_field is set, then the temporary field was created + from certain sub-types of Item_result_field (e.g. Item_func) + See create_tmp_field() in sql_select.cc for details. +*/ + +class Tmp_field_src +{ + Field *m_field; + Field *m_default_field; + Item_result_field *m_item_result_field; +public: + Tmp_field_src() + :m_field(0), + m_default_field(0), + m_item_result_field(0) + { } + Field *field() const { return m_field; } + Field *default_field() const { return m_default_field; } + Item_result_field *item_result_field() const { return m_item_result_field; } + void set_field(Field *field) { m_field= field; } + void set_default_field(Field *field) { m_default_field= field; } + void set_item_result_field(Item_result_field *item) + { m_item_result_field= item; } +}; + + +/** + Parameters for create_tmp_field_ex(). + See create_tmp_field() in sql_select.cc for details. +*/ + +class Tmp_field_param +{ + bool m_group; + bool m_modify_item; + bool m_table_cant_handle_bit_fields; + bool m_make_copy_field; +public: + Tmp_field_param(bool group, + bool modify_item, + bool table_cant_handle_bit_fields, + bool make_copy_field) + :m_group(group), + m_modify_item(modify_item), + m_table_cant_handle_bit_fields(table_cant_handle_bit_fields), + m_make_copy_field(make_copy_field) + { } + bool group() const { return m_group; } + bool modify_item() const { return m_modify_item; } + bool table_cant_handle_bit_fields() const + { return m_table_cant_handle_bit_fields; } + bool make_copy_field() const { return m_make_copy_field; } + void set_modify_item(bool to) { m_modify_item= to; } +}; + + +class Item_const +{ +public: + virtual ~Item_const() {} + virtual const Type_all_attributes *get_type_all_attributes_from_const() const= 0; + virtual bool const_is_null() const { return false; } + virtual const longlong *const_ptr_longlong() const { return NULL; } + virtual const double *const_ptr_double() const { return NULL; } + virtual const my_decimal *const_ptr_my_decimal() const { return NULL; } + virtual const MYSQL_TIME *const_ptr_mysql_time() const { return NULL; } + virtual const String *const_ptr_string() const { return NULL; } +}; + + +/****************************************************************************/ + +#define STOP_PTR ((void *) 1) + class Item: public Value_source, public Type_all_attributes { @@ -653,16 +740,26 @@ public: static void operator delete(void *ptr, MEM_ROOT *mem_root) {} enum Type {FIELD_ITEM= 0, FUNC_ITEM, SUM_FUNC_ITEM, - WINDOW_FUNC_ITEM, STRING_ITEM, - INT_ITEM, REAL_ITEM, NULL_ITEM, VARBIN_ITEM, - COPY_STR_ITEM, FIELD_AVG_ITEM, DEFAULT_VALUE_ITEM, - PROC_ITEM,COND_ITEM, REF_ITEM, FIELD_STD_ITEM, - FIELD_VARIANCE_ITEM, INSERT_VALUE_ITEM, + WINDOW_FUNC_ITEM, + /* + NOT NULL literal-alike constants, which do not change their + value during an SQL statement execution, but can optionally + change their value between statements: + - Item_literal - real NOT NULL constants + - Item_param - can change between statements + - Item_splocal - can change between statements + - Item_user_var_as_out_param - hack + Note, Item_user_var_as_out_param actually abuses the type code. + It should be moved out of the Item tree eventually. + */ + CONST_ITEM, + NULL_ITEM, // Item_null or Item_param bound to NULL + COPY_STR_ITEM, FIELD_AVG_ITEM, DEFAULT_VALUE_ITEM, + PROC_ITEM,COND_ITEM, REF_ITEM, FIELD_STD_ITEM, + FIELD_VARIANCE_ITEM, INSERT_VALUE_ITEM, SUBSELECT_ITEM, ROW_ITEM, CACHE_ITEM, TYPE_HOLDER, - PARAM_ITEM, TRIGGER_FIELD_ITEM, DECIMAL_ITEM, - XPATH_NODESET, XPATH_NODESET_CMP, - VIEW_FIXER_ITEM, EXPR_CACHE_ITEM, - DATE_ITEM}; + PARAM_ITEM, TRIGGER_FIELD_ITEM, + EXPR_CACHE_ITEM}; enum cond_result { COND_UNDEF,COND_OK,COND_TRUE,COND_FALSE }; @@ -704,11 +801,34 @@ protected: */ Field *tmp_table_field_from_field_type(TABLE *table) { + DBUG_ASSERT(is_fixed()); const Type_handler *h= type_handler()->type_handler_for_tmp_table(this); return h->make_and_init_table_field(&name, Record_addr(maybe_null), *this, table); } + /** + Create a temporary field for a simple Item, which does not + need any special action after the field creation: + - is not an Item_field descendant (and not a reference to Item_field) + - is not an Item_result_field descendant + - does not need to copy any DEFAULT value to the result Field + - does not need to set Field::is_created_from_null_item for the result + See create_tmp_field_ex() for details on parameters and return values. + */ + Field *create_tmp_field_ex_simple(TABLE *table, + Tmp_field_src *src, + const Tmp_field_param *param) + { + DBUG_ASSERT(!param->make_copy_field()); + DBUG_ASSERT(!is_result_field()); + DBUG_ASSERT(type() != NULL_ITEM); + return tmp_table_field_from_field_type(table); + } Field *create_tmp_field_int(TABLE *table, uint convert_int_length); + Field *tmp_table_field_from_field_type_maybe_null(TABLE *table, + Tmp_field_src *src, + const Tmp_field_param *param, + bool is_explicit_null); void push_note_converted_to_negative_complement(THD *thd); void push_note_converted_to_positive_complement(THD *thd); @@ -716,21 +836,21 @@ protected: /* Helper methods, to get an Item value from another Item */ double val_real_from_item(Item *item) { - DBUG_ASSERT(fixed == 1); + DBUG_ASSERT(is_fixed()); double value= item->val_real(); null_value= item->null_value; return value; } longlong val_int_from_item(Item *item) { - DBUG_ASSERT(fixed == 1); + DBUG_ASSERT(is_fixed()); longlong value= item->val_int(); null_value= item->null_value; return value; } String *val_str_from_item(Item *item, String *str) { - DBUG_ASSERT(fixed == 1); + DBUG_ASSERT(is_fixed()); String *res= item->val_str(str); if (res) res->set_charset(collation.collation); @@ -738,33 +858,48 @@ protected: res= NULL; return res; } + bool val_native_from_item(THD *thd, Item *item, Native *to) + { + DBUG_ASSERT(is_fixed()); + null_value= item->val_native(thd, to); + DBUG_ASSERT(null_value == item->null_value); + return null_value; + } + bool val_native_from_field(Field *field, Native *to) + { + if ((null_value= field->is_null())) + return true; + return (null_value= field->val_native(to)); + } + bool val_native_with_conversion_from_item(THD *thd, Item *item, Native *to, + const Type_handler *handler) + { + DBUG_ASSERT(is_fixed()); + return null_value= item->val_native_with_conversion(thd, to, handler); + } my_decimal *val_decimal_from_item(Item *item, my_decimal *decimal_value) { - DBUG_ASSERT(fixed == 1); + DBUG_ASSERT(is_fixed()); my_decimal *value= item->val_decimal(decimal_value); if ((null_value= item->null_value)) value= NULL; return value; } - bool get_date_from_item(Item *item, MYSQL_TIME *ltime, ulonglong fuzzydate) + bool get_date_from_item(THD *thd, Item *item, + MYSQL_TIME *ltime, date_mode_t fuzzydate) { - bool rc= item->get_date(ltime, fuzzydate); + bool rc= item->get_date(thd, ltime, fuzzydate); null_value= MY_TEST(rc || item->null_value); return rc; } - /* - This method is used if the item was not null but convertion to - TIME/DATE/DATETIME failed. We return a zero date if allowed, - otherwise - null. - */ - bool make_zero_date(MYSQL_TIME *ltime, ulonglong fuzzydate); - public: + /* Cache val_str() into the own buffer, e.g. to evaluate constant expressions with subqueries in the ORDER/GROUP clauses. */ String *val_str() { return val_str(&str_value); } + virtual Item_func *get_item_func() { return NULL; } const MY_LOCALE *locale_from_val_str(); @@ -784,14 +919,12 @@ public: bool in_rollup; /* If used in GROUP BY list of a query with ROLLUP */ bool null_value; /* if item is null */ - bool with_sum_func; /* True if item contains a sum func */ bool with_param; /* True if contains an SP parameter */ bool with_window_func; /* True if item contains a window func */ /** True if any item except Item_sum contains a field. Set during parsing. */ bool with_field; - bool fixed; /* If item fixed with fix_fields */ bool is_autogenerated_name; /* indicate was name of this Item autogenerated or set by user */ // alloc & destruct is done as start of select on THD::mem_root @@ -815,13 +948,13 @@ public: void set_name(THD *thd, const char *str, size_t length, CHARSET_INFO *cs); void set_name_no_truncate(THD *thd, const char *str, uint length, CHARSET_INFO *cs); - void init_make_send_field(Send_field *tmp_field,enum enum_field_types type); + void init_make_send_field(Send_field *tmp_field, const Type_handler *h); virtual void cleanup(); virtual void make_send_field(THD *thd, Send_field *field); bool fix_fields_if_needed(THD *thd, Item **ref) { - return fixed ? false : fix_fields(thd, ref); + return is_fixed() ? false : fix_fields(thd, ref); } bool fix_fields_if_needed_for_scalar(THD *thd, Item **ref) { @@ -835,7 +968,27 @@ public: { return fix_fields_if_needed_for_scalar(thd, ref); } - virtual bool fix_fields(THD *, Item **); + /* + By default we assume that an Item is fixed by the contstructor. + */ + virtual bool fix_fields(THD *, Item **) + { + /* + This should not normally be called, because usually before + fix_fields() we check is_fixed() to be false. + But historically we allow fix_fields() to be called for Items + who return basic_const_item()==true. + */ + DBUG_ASSERT(is_fixed()); + DBUG_ASSERT(basic_const_item()); + return false; + } + virtual bool is_fixed() const { return true; } + virtual void unfix_fields() + { + DBUG_ASSERT(0); + } + /* Fix after some tables has been pulled out. Basically re-calculate all attributes that are dependent on the tables. @@ -855,11 +1008,14 @@ public: but rather uses intermediate type conversion items. Then the method is supposed to be applied recursively. */ - virtual inline void quick_fix_field() { fixed= 1; } + virtual void quick_fix_field() + { + DBUG_ASSERT(0); + } - bool save_in_value(struct st_value *value) + bool save_in_value(THD *thd, struct st_value *value) { - return type_handler()->Item_save_in_value(this, value); + return type_handler()->Item_save_in_value(thd, this, value); } /* Function returns 1 on overflow and -1 on fatal errors */ @@ -884,6 +1040,21 @@ public: return type_handler()->field_type(); } virtual const Type_handler *type_handler() const= 0; + /** + Detects if an Item has a fixed data type which is known + even before fix_fields(). + Currently it's important only to find Items with a fixed boolean + data type. More item types can be marked in the future as having + a fixed data type (e.g. all literals, all fixed type functions, etc). + + @retval NULL if the Item type is not known before fix_fields() + @retval the pointer to the data type handler, if the data type + is known before fix_fields(). + */ + virtual const Type_handler *fixed_type_handler() const + { + return NULL; + } const Type_handler *type_handler_for_comparison() const { return type_handler()->type_handler_for_comparison(); @@ -892,13 +1063,9 @@ public: { return type_handler(); } - virtual const Type_handler *cast_to_int_type_handler() const - { - return type_handler(); - } - virtual const Type_handler *type_handler_for_system_time() const + const Type_handler *cast_to_int_type_handler() const { - return real_type_handler(); + return real_type_handler()->cast_to_int_type_handler(); } /* result_type() of an item specifies how the value should be returned */ Item_result result_type() const @@ -954,6 +1121,10 @@ public: return type_handler()->Item_get_cache(thd, this); } virtual enum Type type() const =0; + bool is_of_type(Type t, Item_result cmp) const + { + return type() == t && cmp_type() == cmp; + } /* real_type() is the type of base item. This is same as type() for most items, except Item_ref() and Item_cache_wrapper() where it @@ -1018,6 +1189,12 @@ public: If value is not null null_value flag will be reset to FALSE. */ virtual double val_real()=0; + Double_null to_double_null() + { + // val_real() must be caleed on a separate line. See to_longlong_null() + double nr= val_real(); + return Double_null(nr, null_value); + } /* Return integer representation of item. @@ -1033,6 +1210,20 @@ public: { return Longlong_hybrid(val_int(), unsigned_flag); } + Longlong_null to_longlong_null() + { + longlong nr= val_int(); + /* + C++ does not guarantee the order of parameter evaluation, + so to make sure "null_value" is passed to the constructor + after the val_int() call, val_int() is caled on a separate line. + */ + return Longlong_null(nr, null_value); + } + Longlong_hybrid_null to_longlong_hybrid_null() + { + return Longlong_hybrid_null(to_longlong_null(), unsigned_flag); + } /** Get a value for CAST(x AS SIGNED). Too large positive unsigned integer values are converted @@ -1054,7 +1245,6 @@ public: { return cast_to_int_type_handler()->Item_val_int_unsigned_typecast(this); } - longlong val_int_unsigned_typecast_from_decimal(); longlong val_int_unsigned_typecast_from_int(); longlong val_int_unsigned_typecast_from_str(); @@ -1101,6 +1291,59 @@ public: */ virtual String *val_str(String *str)=0; + + bool val_native_with_conversion(THD *thd, Native *to, const Type_handler *th) + { + return th->Item_val_native_with_conversion(thd, this, to); + } + bool val_native_with_conversion_result(THD *thd, Native *to, + const Type_handler *th) + { + return th->Item_val_native_with_conversion_result(thd, this, to); + } + + virtual bool val_native(THD *thd, Native *to) + { + /* + The default implementation for the Items that do not need native format: + - Item_basic_value + - Item_copy + - Item_exists_subselect + - Item_sum_field + - Item_sum_or_func (default implementation) + - Item_proc + - Item_type_holder (as val_xxx() are never called for it); + - TODO: Item_name_const will need val_native() in the future, + when we add this syntax: + TIMESTAMP WITH LOCAL TIMEZONE'2001-01-01 00:00:00' + + These hybrid Item types override val_native(): + - Item_field + - Item_param + - Item_sp_variable + - Item_ref + - Item_cache_wrapper + - Item_direct_ref + - Item_direct_view_ref + - Item_ref_null_helper + - Item_sum_or_func + Note, these hybrid type Item_sum_or_func descendants + override the default implementation: + * Item_sum_hybrid + * Item_func_hybrid_field_type + * Item_func_min_max + * Item_func_sp + * Item_func_last_value + * Item_func_rollup_const + */ + DBUG_ASSERT(0); + return null_value= true; + } + virtual bool val_native_result(THD *thd, Native *to) + { + return val_native(thd, to); + } + /* Returns string representation of this item in ASCII format. @@ -1213,7 +1456,7 @@ public: { return type_handler()->Item_val_bool(this); } - virtual String *val_nodeset(String*) { return 0; } + virtual String *val_raw(String*) { return 0; } bool eval_const_cond() { @@ -1235,28 +1478,15 @@ public: /* Helper functions, see item_sum.cc */ String *val_string_from_real(String *str); String *val_string_from_int(String *str); - String *val_string_from_decimal(String *str); - String *val_string_from_date(String *str); my_decimal *val_decimal_from_real(my_decimal *decimal_value); my_decimal *val_decimal_from_int(my_decimal *decimal_value); my_decimal *val_decimal_from_string(my_decimal *decimal_value); - my_decimal *val_decimal_from_date(my_decimal *decimal_value); - my_decimal *val_decimal_from_time(my_decimal *decimal_value); - longlong val_int_from_decimal(); - longlong val_int_from_date(); longlong val_int_from_real() { - DBUG_ASSERT(fixed == 1); + DBUG_ASSERT(is_fixed()); return Converter_double_to_longlong_with_warn(val_real(), false).result(); } longlong val_int_from_str(int *error); - double val_real_from_decimal(); - double val_real_from_date(); - - // Get TIME, DATE or DATETIME using proper sql_mode flags for the field type - bool get_temporal_with_sql_mode(MYSQL_TIME *ltime); - // Check NULL value for a TIME, DATE or DATETIME expression - bool is_null_from_temporal(); int save_time_in_field(Field *field, bool no_conversions); int save_date_in_field(Field *field, bool no_conversions); @@ -1317,6 +1547,14 @@ public: a constant expression. Used in the optimizer to propagate basic constants. */ virtual bool basic_const_item() const { return 0; } + /* + Test if "this" is an ORDER position (rather than an expression). + Notes: + - can be called before fix_fields(). + - local SP variables (even of integer types) are always expressions, not + positions. (And they can't be used before fix_fields is called for them). + */ + virtual bool is_order_clause_position() const { return false; } /* cloning of constant items (0 if it is not const) */ virtual Item *clone_item(THD *thd) { return 0; } virtual Item* build_clone(THD *thd) { return get_copy(thd); } @@ -1364,14 +1602,14 @@ public: /** TIME or DATETIME precision of the item: 0..6 */ - uint time_precision() + uint time_precision(THD *thd) { - return const_item() ? type_handler()->Item_time_precision(this) : + return const_item() ? type_handler()->Item_time_precision(thd, this) : MY_MIN(decimals, TIME_SECOND_PART_DIGITS); } - uint datetime_precision() + uint datetime_precision(THD *thd) { - return const_item() ? type_handler()->Item_datetime_precision(this) : + return const_item() ? type_handler()->Item_datetime_precision(thd, this) : MY_MIN(decimals, TIME_SECOND_PART_DIGITS); } virtual longlong val_int_min() const @@ -1479,78 +1717,28 @@ public: void split_sum_func2(THD *thd, Ref_ptr_array ref_pointer_array, List<Item> &fields, Item **ref, uint flags); - virtual bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate)= 0; - bool get_date_from_int(MYSQL_TIME *ltime, ulonglong fuzzydate); - bool get_date_from_year(MYSQL_TIME *ltime, ulonglong fuzzydate); - bool get_date_from_real(MYSQL_TIME *ltime, ulonglong fuzzydate); - bool get_date_from_decimal(MYSQL_TIME *ltime, ulonglong fuzzydate); - bool get_date_from_string(MYSQL_TIME *ltime, ulonglong fuzzydate); - bool get_time(MYSQL_TIME *ltime) - { return get_date(ltime, Time::flags_for_get_date()); } - /* - Get time with automatic DATE/DATETIME to TIME conversion, - by subtracting CURRENT_DATE. - - Performce a reverse operation to CAST(time AS DATETIME) - Suppose: - - we have a set of items (typically with the native MYSQL_TYPE_TIME type) - whose item->get_date() return TIME1 value, and - - CAST(AS DATETIME) for the same Items return DATETIME1, - after applying time-to-datetime conversion to TIME1. - - then all items (typically of the native MYSQL_TYPE_{DATE|DATETIME} types) - whose get_date() return DATETIME1 must also return TIME1 from - get_time_with_conversion() - - @param thd - the thread, its variables.old_mode is checked - to decide if use simple YYYYMMDD truncation (old mode), - or perform full DATETIME-to-TIME conversion with - CURRENT_DATE subtraction. - @param[out] ltime - store the result here - @param fuzzydate - flags to be used for the get_date() call. - Normally, should include TIME_TIME_ONLY, to let - the called low-level routines, e.g. str_to_date(), - know that we prefer TIME rather that DATE/DATETIME - and do less conversion outside of the low-level - routines. - - @returns true - on error, e.g. get_date() returned NULL value, - or get_date() returned DATETIME/DATE with non-zero - YYYYMMDD part. - @returns false - on success - */ - bool get_time_with_conversion(THD *thd, MYSQL_TIME *ltime, - ulonglong fuzzydate); + virtual bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate)= 0; + bool get_date_from_int(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate); + bool get_date_from_real(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate); + bool get_date_from_string(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate); + bool get_time(THD *thd, MYSQL_TIME *ltime) + { return get_date(thd, ltime, Time::Options(thd)); } // Get a DATE or DATETIME value in numeric packed format for comparison - virtual longlong val_datetime_packed() + virtual longlong val_datetime_packed(THD *thd) { - ulonglong fuzzydate= TIME_FUZZY_DATES | TIME_INVALID_DATES; - Datetime dt(current_thd, this, fuzzydate); - return dt.is_valid_datetime() ? pack_time(dt.get_mysql_time()) : 0; + return Datetime(thd, this, Datetime::Options_cmp(thd)).to_packed(); } // Get a TIME value in numeric packed format for comparison - virtual longlong val_time_packed() - { - Time tm(this, Time::comparison_flags_for_get_date()); - return tm.is_valid_time() ? pack_time(tm.get_mysql_time()) : 0; - } - longlong val_datetime_packed_result(); - longlong val_time_packed_result() + virtual longlong val_time_packed(THD *thd) { - MYSQL_TIME ltime; - ulonglong fuzzydate= Time::comparison_flags_for_get_date(); - return get_date_result(<ime, fuzzydate) ? 0 : pack_time(<ime); + return Time(thd, this, Time::Options_cmp(thd)).to_packed(); } + longlong val_datetime_packed_result(THD *thd); + longlong val_time_packed_result(THD *thd); + + virtual bool get_date_result(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) + { return get_date(thd, ltime,fuzzydate); } - // Get a temporal value in packed DATE/DATETIME or TIME format - longlong val_temporal_packed(enum_field_types f_type) - { - return f_type == MYSQL_TYPE_TIME ? val_time_packed() : - val_datetime_packed(); - } - bool get_seconds(ulonglong *sec, ulong *sec_part); - virtual bool get_date_result(MYSQL_TIME *ltime, ulonglong fuzzydate) - { return get_date(ltime,fuzzydate); } /* The method allows to determine nullness of a complex expression without fully evaluating it, instead of calling val/result*() then @@ -1565,35 +1753,7 @@ public: */ virtual void update_null_value () { - switch (cmp_type()) { - case INT_RESULT: - (void) val_int(); - break; - case REAL_RESULT: - (void) val_real(); - break; - case DECIMAL_RESULT: - { - my_decimal tmp; - (void) val_decimal(&tmp); - } - break; - case TIME_RESULT: - { - MYSQL_TIME ltime; - (void) get_temporal_with_sql_mode(<ime); - } - break; - case STRING_RESULT: - { - StringBuffer<MAX_FIELD_WIDTH> tmp; - (void) val_str(&tmp); - } - break; - case ROW_RESULT: - DBUG_ASSERT(0); - null_value= true; - } + return type_handler()->Item_update_null_value(this); } /* @@ -1611,10 +1771,9 @@ public: set field of temporary table for Item which can be switched on temporary table during query processing (grouping and so on) */ - virtual void set_result_field(Field *field) {} virtual bool is_result_field() { return 0; } - virtual bool is_bool_type() { return false; } virtual bool is_json_type() { return false; } + virtual bool is_bool_literal() const { return false; } /* This is to handle printing of default values */ virtual bool need_parentheses_in_default() { return false; } virtual void save_in_result_field(bool no_conversions) {} @@ -1679,8 +1838,10 @@ public: /*========= Item processors, to be used with Item::walk() ========*/ virtual bool remove_dependence_processor(void *arg) { return 0; } virtual bool cleanup_processor(void *arg); - virtual bool cleanup_excluding_fields_processor(void *arg) { return cleanup_processor(arg); } - virtual bool cleanup_excluding_const_fields_processor(void *arg) { return cleanup_processor(arg); } + virtual bool cleanup_excluding_fields_processor (void *arg) + { return cleanup_processor(arg); } + virtual bool cleanup_excluding_const_fields_processor (void *arg) + { return cleanup_processor(arg); } virtual bool collect_item_field_processor(void *arg) { return 0; } virtual bool collect_outer_ref_processor(void *arg) {return 0; } virtual bool check_inner_refs_processor(void *arg) { return 0; } @@ -1720,12 +1881,22 @@ public: Not to be used for AND/OR formulas. */ virtual bool excl_dep_on_table(table_map tab_map) { return false; } - /* + /* TRUE if the expression depends only on grouping fields of sel - or can be converted to such an exression using equalities. + or can be converted to such an expression using equalities. + It also checks if the expression doesn't contain stored procedures, + subqueries or randomly generated elements. + Not to be used for AND/OR formulas. + */ + virtual bool excl_dep_on_grouping_fields(st_select_lex *sel) + { return false; } + /* + TRUE if the expression depends only on fields from the left part of + IN subquery or can be converted to such an expression using equalities. Not to be used for AND/OR formulas. */ - virtual bool excl_dep_on_grouping_fields(st_select_lex *sel) { return false; } + virtual bool excl_dep_on_in_subq_left_part(Item_in_subselect *subq_pred) + { return false; } virtual bool switch_to_nullable_fields_processor(void *arg) { return 0; } virtual bool find_function_processor (void *arg) { return 0; } @@ -1783,6 +1954,12 @@ public: virtual bool check_partition_func_processor(void *arg) { return 1;} virtual bool post_fix_fields_part_expr_processor(void *arg) { return 0; } virtual bool rename_fields_processor(void *arg) { return 0; } + /* + TRUE if the function is knowingly TRUE or FALSE. + Not to be used for AND/OR formulas. + */ + virtual bool is_simplified_cond_processor(void *arg) { return false; } + /** Processor used to check acceptability of an item in the defining expression for a virtual column @@ -1816,6 +1993,12 @@ public: virtual bool check_valid_arguments_processor(void *arg) { return 0; } virtual bool update_vcol_processor(void *arg) { return 0; } virtual bool set_fields_as_dependent_processor(void *arg) { return 0; } + /* + Find if some of the key parts of table keys (the reference on table is + passed as an argument) participate in the expression. + If there is some, sets a bit for this key in the proper key map. + */ + virtual bool check_index_dependence(void *arg) { return 0; } /*============== End of Item processor list ======================*/ virtual Item *get_copy(THD *thd)=0; @@ -1885,11 +2068,17 @@ public: return Type_handler::type_handler_long_or_longlong(max_char_length()); } - virtual Field *create_tmp_field(bool group, TABLE *table) - { - return tmp_table_field_from_field_type(table); - } - + /** + Create field for temporary table. + @param table Temporary table + @param [OUT] src Who created the fields + @param param Create parameters + @retval NULL (on error) + @retval a pointer to a newly create Field (on success) + */ + virtual Field *create_tmp_field_ex(TABLE *table, + Tmp_field_src *src, + const Tmp_field_param *param)= 0; virtual Item_field *field_for_view_update() { return 0; } virtual Item *neg_transformer(THD *thd) { return NULL; } @@ -1901,11 +2090,19 @@ public: { return this; } virtual Item *derived_field_transformer_for_where(THD *thd, uchar *arg) { return this; } - virtual Item *derived_grouping_field_transformer_for_where(THD *thd, - uchar *arg) + virtual Item *grouping_field_transformer_for_where(THD *thd, uchar *arg) + { return this; } + /* Now is not used. */ + virtual Item *in_subq_field_transformer_for_where(THD *thd, uchar *arg) + { return this; } + virtual Item *in_subq_field_transformer_for_having(THD *thd, uchar *arg) { return this; } virtual Item *in_predicate_to_in_subs_transformer(THD *thd, uchar *arg) { return this; } + virtual Item *field_transformer_for_having_pushdown(THD *thd, uchar *arg) + { return this; } + virtual Item *multiple_equality_transformer(THD *thd, uchar *arg) + { return this; } virtual bool expr_cache_is_needed(THD *) { return FALSE; } virtual Item *safe_charset_converter(THD *thd, CHARSET_INFO *tocs); bool needs_charset_converter(uint32 length, CHARSET_INFO *tocs) const @@ -1956,6 +2153,7 @@ public: delete this; } + virtual const Item_const *get_item_const() const { return NULL; } virtual Item_splocal *get_item_splocal() { return 0; } virtual Rewritable_query_parameter *get_rewritable_query_parameter() { return 0; } @@ -2029,13 +2227,16 @@ public: /* Return TRUE if the item points to a column of an outer-joined table. */ - virtual bool is_outer_field() const { DBUG_ASSERT(fixed); return FALSE; } + virtual bool is_outer_field() const { DBUG_ASSERT(is_fixed()); return FALSE; } /** Checks if this item or any of its decendents contains a subquery. This is a replacement of the former Item::has_subquery() and Item::with_subselect. */ - virtual bool with_subquery() const { DBUG_ASSERT(fixed); return false; } + virtual bool with_subquery() const { DBUG_ASSERT(is_fixed()); return false; } + + virtual bool with_sum_func() const { return false; } + virtual With_sum_func_cache* get_with_sum_func_cache() { return NULL; } Item* set_expr_cache(THD *thd); @@ -2082,6 +2283,11 @@ public: */ virtual void under_not(Item_func_not * upper __attribute__((unused))) {}; + /* + If Item_field is wrapped in Item_direct_wrep remove this Item_direct_ref + wrapper. + */ + virtual Item *remove_item_direct_ref() { return this; } void register_in(THD *thd); @@ -2099,6 +2305,29 @@ public: { marker &= ~EXTRACTION_MASK; } + void check_pushable_cond(Pushdown_checker excl_dep_func, uchar *arg); + bool pushable_cond_checker_for_derived(uchar *arg) + { + return excl_dep_on_table(*((table_map *)arg)); + } + bool pushable_cond_checker_for_subquery(uchar *arg) + { + return excl_dep_on_in_subq_left_part((Item_in_subselect *)arg); + } + Item *build_pushable_cond(THD *thd, + Pushdown_checker checker, + uchar *arg); + /* + Checks if this item depends only on the arg table + */ + bool pushable_equality_checker_for_derived(uchar *arg) + { + return (used_tables() == *((table_map *)arg)); + } + /* + Checks if this item consists in the left part of arg IN subquery predicate + */ + bool pushable_equality_checker_for_subquery(uchar *arg); }; MEM_ROOT *get_thd_memroot(THD *thd); @@ -2113,6 +2342,66 @@ inline Item* get_item_copy (THD *thd, T* item) } +#ifndef DBUG_OFF +/** + A helper class to print the data type and the value for an Item + in debug builds. +*/ +class DbugStringItemTypeValue: public StringBuffer<128> +{ +public: + DbugStringItemTypeValue(THD *thd, const Item *item) + { + append('('); + append(item->type_handler()->name().ptr()); + append(')'); + const_cast<Item*>(item)->print(this, QT_EXPLAIN); + } +}; +#endif + +class With_sum_func_cache +{ +protected: + bool m_with_sum_func; // True if the owner item contains a sum func +public: + With_sum_func_cache() + :m_with_sum_func(false) + { } + With_sum_func_cache(const Item *a) + :m_with_sum_func(a->with_sum_func()) + { } + With_sum_func_cache(const Item *a, const Item *b) + :m_with_sum_func(a->with_sum_func() || b->with_sum_func()) + { } + With_sum_func_cache(const Item *a, const Item *b, const Item *c) + :m_with_sum_func(a->with_sum_func() || b->with_sum_func() || + c->with_sum_func()) + { } + With_sum_func_cache(const Item *a, const Item *b, const Item *c, + const Item *d) + :m_with_sum_func(a->with_sum_func() || b->with_sum_func() || + c->with_sum_func() || d->with_sum_func()) + { } + With_sum_func_cache(const Item *a, const Item *b, const Item *c, + const Item *d, const Item *e) + :m_with_sum_func(a->with_sum_func() || b->with_sum_func() || + c->with_sum_func() || d->with_sum_func() || + e->with_sum_func()) + { } + void set_with_sum_func() { m_with_sum_func= true; } + void reset_with_sum_func() { m_with_sum_func= false; } + void copy_with_sum_func(const Item *item) + { + m_with_sum_func= item->with_sum_func(); + } + void join_with_sum_func(const Item *item) + { + m_with_sum_func|= item->with_sum_func(); + } +}; + + /* This class is a replacement for the former member Item::with_subselect. Determines if the descendant Item is a subselect or some of @@ -2216,22 +2505,23 @@ protected: } return true; } - bool excl_dep_on_grouping_fields(st_select_lex *sel) + bool excl_dep_on_grouping_fields(st_select_lex *sel); + bool eq(const Item_args *other, bool binary_cmp) const { - for (uint i= 0; i < arg_count; i++) + for (uint i= 0; i < arg_count ; i++) { - if (args[i]->const_item()) - continue; - if (!args[i]->excl_dep_on_grouping_fields(sel)) + if (!args[i]->eq(other->args[i], binary_cmp)) return false; } return true; } - bool eq(const Item_args *other, bool binary_cmp) const + bool excl_dep_on_in_subq_left_part(Item_in_subselect *subq_pred) { - for (uint i= 0; i < arg_count ; i++) + for (uint i= 0; i < arg_count; i++) { - if (!args[i]->eq(other->args[i], binary_cmp)) + if (args[i]->const_item()) + continue; + if (!args[i]->excl_dep_on_in_subq_left_part(subq_pred)) return false; } return true; @@ -2287,6 +2577,30 @@ public: { args[arg_count++]= item; } + /** + Extract row elements from the given position. + For example, for this input: (1,2),(3,4),(5,6) + pos=0 will extract (1,3,5) + pos=1 will extract (2,4,6) + @param thd - current thread, to allocate memory on its mem_root + @param rows - an array of compatible ROW-type items + @param pos - the element position to extract + */ + bool alloc_and_extract_row_elements(THD *thd, const Item_args *rows, uint pos) + { + DBUG_ASSERT(rows->argument_count() > 0); + DBUG_ASSERT(rows->arguments()[0]->cols() > pos); + if (alloc_arguments(thd, rows->argument_count())) + return true; + for (uint i= 0; i < rows->argument_count(); i++) + { + DBUG_ASSERT(rows->arguments()[0]->cols() == rows->arguments()[i]->cols()); + Item *arg= rows->arguments()[i]->element_index(pos); + add_argument(arg); + } + DBUG_ASSERT(argument_count() == rows->argument_count()); + return false; + } inline Item **arguments() const { return args; } inline uint argument_count() const { return arg_count; } inline void remove_arguments() { arg_count=0; } @@ -2321,27 +2635,39 @@ public: class Item_string; -/** - A common class for Item_basic_constant and Item_param -*/ -class Item_basic_value :public Item +class Item_fixed_hybrid: public Item { - bool is_basic_value(const Item *item, Type type_arg) const - { - return item->basic_const_item() && item->type() == type_arg; - } - bool is_basic_value(Type type_arg) const +public: + bool fixed; // If item was fixed with fix_fields +public: + Item_fixed_hybrid(THD *thd): Item(thd), fixed(false) + { } + Item_fixed_hybrid(THD *thd, Item_fixed_hybrid *item) + :Item(thd, item), fixed(item->fixed) + { } + bool fix_fields(THD *thd, Item **ref) { - return basic_const_item() && type() == type_arg; + DBUG_ASSERT(!fixed); + fixed= true; + return false; } - bool str_eq(const String *value, - const String *other, CHARSET_INFO *cs, bool binary_cmp) const + void cleanup() { - return binary_cmp ? - value->bin_eq(other) : - collation.collation == cs && value->eq(other, collation.collation); + Item::cleanup(); + fixed= false; } + void quick_fix_field() { fixed= true; } + void unfix_fields() { fixed= false; } + bool is_fixed() const { return fixed; } +}; + +/** + A common class for Item_basic_constant and Item_param +*/ +class Item_basic_value :public Item, + public Item_const +{ protected: // Value metadata, e.g. to make string processing easier class Metadata: private MY_STRING_METADATA @@ -2378,66 +2704,40 @@ protected: fix_charset_and_length(str.charset(), dv, Metadata(&str)); } Item_basic_value(THD *thd): Item(thd) {} - /* - In the xxx_eq() methods below we need to cast off "const" to - call val_xxx(). This is OK for Item_basic_constant and Item_param. - */ - bool null_eq(const Item *item) const - { - DBUG_ASSERT(is_basic_value(NULL_ITEM)); - return item->type() == NULL_ITEM; - } - bool str_eq(const String *value, const Item *item, bool binary_cmp) const - { - DBUG_ASSERT(is_basic_value(STRING_ITEM)); - return is_basic_value(item, STRING_ITEM) && - str_eq(value, ((Item_basic_value*)item)->val_str(NULL), - item->collation.collation, binary_cmp); - } - bool real_eq(double value, const Item *item) const - { - DBUG_ASSERT(is_basic_value(REAL_ITEM)); - return is_basic_value(item, REAL_ITEM) && - value == ((Item_basic_value*)item)->val_real(); - } - bool int_eq(longlong value, const Item *item) const +public: + Field *create_tmp_field_ex(TABLE *table, Tmp_field_src *src, + const Tmp_field_param *param) { - DBUG_ASSERT(is_basic_value(INT_ITEM)); - return is_basic_value(item, INT_ITEM) && - value == ((Item_basic_value*)item)->val_int() && - (value >= 0 || item->unsigned_flag == unsigned_flag); + + /* + create_tmp_field_ex() for this type of Items is called for: + - CREATE TABLE ... SELECT + - In ORDER BY: SELECT max(a) FROM t1 GROUP BY a ORDER BY 'const'; + - In CURSORS: + DECLARE c CURSOR FOR SELECT 'test'; + OPEN c; + */ + return tmp_table_field_from_field_type_maybe_null(table, src, param, + type() == Item::NULL_ITEM); } + bool eq(const Item *item, bool binary_cmp) const; + const Type_all_attributes *get_type_all_attributes_from_const() const + { return this; } }; class Item_basic_constant :public Item_basic_value { - table_map used_table_map; public: - Item_basic_constant(THD *thd): Item_basic_value(thd), used_table_map(0) {}; - void set_used_tables(table_map map) { used_table_map= map; } - table_map used_tables() const { return used_table_map; } - bool check_vcol_func_processor(void *arg) { return FALSE;} + Item_basic_constant(THD *thd): Item_basic_value(thd) {}; + bool check_vcol_func_processor(void *arg) { return false; } + const Item_const *get_item_const() const { return this; } virtual Item_basic_constant *make_string_literal_concat(THD *thd, const LEX_CSTRING *) { DBUG_ASSERT(0); return this; } - /* to prevent drop fixed flag (no need parent cleanup call) */ - void cleanup() - { - /* - Restore the original field name as it might not have been allocated - in the statement memory. If the name is auto generated, it must be - done again between subsequent executions of a prepared statement. - */ - if (orig_name) - { - name.str= orig_name; - name.length= strlen(orig_name); - } - } }; @@ -2448,7 +2748,7 @@ public: - CASE expression (Item_case_expr); *****************************************************************************/ -class Item_sp_variable :public Item +class Item_sp_variable :public Item_fixed_hybrid { protected: /* @@ -2480,7 +2780,8 @@ public: longlong val_int(); String *val_str(String *sp); my_decimal *val_decimal(my_decimal *decimal_value); - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate); + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate); + bool val_native(THD *thd, Native *to); bool is_null(); public: @@ -2488,6 +2789,11 @@ public: inline bool const_item() const; + Field *create_tmp_field_ex(TABLE *table, Tmp_field_src *src, + const Tmp_field_param *param) + { + return create_tmp_field_ex_simple(table, src, param); + } inline int save_in_field(Field *field, bool no_conversions); inline bool send(Protocol *protocol, st_value *buffer); bool check_vcol_func_processor(void *arg) @@ -2591,6 +2897,20 @@ public: */ Field *create_field_for_create_select(TABLE *table) { return create_table_field_from_handler(table); } + + bool is_valid_limit_clause_variable_with_error() const + { + /* + In case if the variable has an anchored data type, e.g.: + DECLARE a TYPE OF t1.a; + type_handler() is set to &type_handler_null and this + function detects such variable as not valid in LIMIT. + */ + if (type_handler()->is_limit_clause_valid_type()) + return true; + my_error(ER_WRONG_SPVAR_TYPE_IN_LIMIT, MYF(0)); + return false; + } }; @@ -2737,11 +3057,10 @@ inline enum Item::Type Item_case_expr::type() const extract a common base with class Item_ref, too. */ -class Item_name_const : public Item +class Item_name_const : public Item_fixed_hybrid { Item *value_item; Item *name_item; - bool valid_args; public: Item_name_const(THD *thd, Item *name_arg, Item *val); @@ -2752,7 +3071,7 @@ public: longlong val_int(); String *val_str(String *sp); my_decimal *val_decimal(my_decimal *); - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate); + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate); bool is_null(); virtual void print(String *str, enum_query_type query_type); @@ -2766,6 +3085,17 @@ public: return TRUE; } + Field *create_tmp_field_ex(TABLE *table, Tmp_field_src *src, + const Tmp_field_param *param) + { + /* + We can get to here when using a CURSOR for a query with NAME_CONST(): + DECLARE c CURSOR FOR SELECT NAME_CONST('x','y') FROM t1; + OPEN c; + */ + return tmp_table_field_from_field_type_maybe_null(table, src, param, + type() == Item::NULL_ITEM); + } int save_in_field(Field *field, bool no_conversions) { return value_item->save_in_field(field, no_conversions); @@ -2783,15 +3113,27 @@ public: { return get_item_copy<Item_name_const>(thd, this); } }; -class Item_num: public Item_basic_constant + +class Item_literal: public Item_basic_constant +{ +public: + Item_literal(THD *thd): Item_basic_constant(thd) + { } + enum Type type() const { return CONST_ITEM; } + bool check_partition_func_processor(void *int_arg) { return false;} + bool const_item() const { return true; } + bool basic_const_item() const { return true; } +}; + + +class Item_num: public Item_literal { public: - Item_num(THD *thd): Item_basic_constant(thd) { collation.set_numeric(); } + Item_num(THD *thd): Item_literal(thd) { collation.set_numeric(); } Item *safe_charset_converter(THD *thd, CHARSET_INFO *tocs); - bool check_partition_func_processor(void *int_arg) { return FALSE;} - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate) + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) { - return type_handler()->Item_get_date(this, ltime, fuzzydate); + return type_handler()->Item_get_date_with_warn(thd, this, ltime, fuzzydate); } }; @@ -2800,24 +3142,26 @@ public: class st_select_lex; -class Item_result_field :public Item /* Item with result field */ +class Item_result_field :public Item_fixed_hybrid /* Item with result field */ { public: Field *result_field; /* Save result here */ - Item_result_field(THD *thd): Item(thd), result_field(0) {} + Item_result_field(THD *thd): Item_fixed_hybrid(thd), result_field(0) {} // Constructor used for Item_sum/Item_cond_and/or (see Item comment) Item_result_field(THD *thd, Item_result_field *item): - Item(thd, item), result_field(item->result_field) + Item_fixed_hybrid(thd, item), result_field(item->result_field) {} ~Item_result_field() {} /* Required with gcc 2.95 */ Field *get_tmp_table_field() { return result_field; } + Field *create_tmp_field_ex(TABLE *table, Tmp_field_src *src, + const Tmp_field_param *param); + void get_tmp_field_src(Tmp_field_src *src, const Tmp_field_param *param); /* This implementation of used_tables() used by Item_avg_field and Item_variance_field which work when only temporary table left, so theu return table map of the temporary table. */ table_map used_tables() const { return 1; } - void set_result_field(Field *field) { result_field= field; } bool is_result_field() { return true; } void save_in_result_field(bool no_conversions) { @@ -2896,39 +3240,6 @@ public: }; -class Item_ident_for_show :public Item -{ -public: - Field *field; - const char *db_name; - const char *table_name; - - Item_ident_for_show(THD *thd, Field *par_field, const char *db_arg, - const char *table_name_arg): - Item(thd), field(par_field), db_name(db_arg), table_name(table_name_arg) - { - Type_std_attributes::set(par_field->type_std_attributes()); - } - enum Type type() const { return FIELD_ITEM; } - double val_real() { return field->val_real(); } - longlong val_int() { return field->val_int(); } - String *val_str(String *str) { return field->val_str(str); } - my_decimal *val_decimal(my_decimal *dec) { return field->val_decimal(dec); } - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate) - { - return field->get_date(ltime, fuzzydate); - } - void make_send_field(THD *thd, Send_field *tmp_field); - const Type_handler *type_handler() const - { - const Type_handler *handler= field->type_handler(); - return handler->type_handler_for_item_field(); - } - Item* get_copy(THD *thd) - { return get_item_copy<Item_ident_for_show>(thd, this); } -}; - - class Item_field :public Item_ident, public Load_data_outvar { @@ -2972,6 +3283,8 @@ public: void save_result(Field *to); double val_result(); longlong val_int_result(); + bool val_native(THD *thd, Native *to); + bool val_native_result(THD *thd, Native *to); String *str_result(String* tmp); my_decimal *val_decimal_result(my_decimal *); bool val_bool_result(); @@ -3015,24 +3328,25 @@ public: const Type_handler *handler= field->type_handler(); return handler->type_handler_for_item_field(); } - const Type_handler *cast_to_int_type_handler() const - { - return field->type_handler()->cast_to_int_type_handler(); - } const Type_handler *real_type_handler() const { if (field->is_created_from_null_item) return &type_handler_null; return field->type_handler(); } + Field *create_tmp_field_from_item_field(TABLE *new_table, + Item_ref *orig_item, + const Tmp_field_param *param); + Field *create_tmp_field_ex(TABLE *table, Tmp_field_src *src, + const Tmp_field_param *param); TYPELIB *get_typelib() const { return field->get_typelib(); } enum_monotonicity_info get_monotonicity_info() const { return MONOTONIC_STRICT_INCREASING; } longlong val_int_endpoint(bool left_endp, bool *incl_endp); - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate); - bool get_date_result(MYSQL_TIME *ltime,ulonglong fuzzydate); + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate); + bool get_date_result(THD *thd, MYSQL_TIME *ltime,date_mode_t fuzzydate); bool is_null() { return field->is_null(); } void update_null_value(); void update_table_bitmaps() @@ -3042,13 +3356,7 @@ public: TABLE *tab= field->table; tab->covering_keys.intersect(field->part_of_key); if (tab->read_set) - bitmap_fast_test_and_set(tab->read_set, field->field_index); - /* - Do not mark a self-referecing virtual column. - Such virtual columns are reported as invalid. - */ - if (field->vcol_info && tab->vcol_set) - tab->mark_virtual_col(field); + tab->mark_column_with_deps(field); } } void update_used_tables() @@ -3125,10 +3433,13 @@ public: virtual Item *update_value_transformer(THD *thd, uchar *select_arg); Item *derived_field_transformer_for_having(THD *thd, uchar *arg); Item *derived_field_transformer_for_where(THD *thd, uchar *arg); - Item *derived_grouping_field_transformer_for_where(THD *thd, uchar *arg); + Item *grouping_field_transformer_for_where(THD *thd, uchar *arg); + Item *in_subq_field_transformer_for_where(THD *thd, uchar *arg); + Item *in_subq_field_transformer_for_having(THD *thd, uchar *arg); virtual void print(String *str, enum_query_type query_type); bool excl_dep_on_table(table_map tab_map); bool excl_dep_on_grouping_fields(st_select_lex *sel); + bool excl_dep_on_in_subq_left_part(Item_in_subselect *subq_pred); bool cleanup_excluding_fields_processor(void *arg) { return field ? 0 : cleanup_processor(arg); } bool cleanup_excluding_const_fields_processor(void *arg) @@ -3146,6 +3457,7 @@ public: DBUG_ASSERT(field_type() == MYSQL_TYPE_GEOMETRY); return field->get_geometry_type(); } + bool check_index_dependence(void *arg); friend class Item_default_value; friend class Item_insert_value; friend class st_select_lex_unit; @@ -3233,22 +3545,21 @@ public: max_length= 0; name.str= name_par ? name_par : "NULL"; name.length= strlen(name.str); - fixed= 1; collation.set(cs, DERIVATION_IGNORABLE, MY_REPERTOIRE_ASCII); } enum Type type() const { return NULL_ITEM; } - bool eq(const Item *item, bool binary_cmp) const { return null_eq(item); } double val_real(); longlong val_int(); String *val_str(String *str); my_decimal *val_decimal(my_decimal *); - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate); + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate); int save_in_field(Field *field, bool no_conversions); int save_safe_in_field(Field *field); bool send(Protocol *protocol, st_value *buffer); const Type_handler *type_handler() const { return &type_handler_null; } bool basic_const_item() const { return 1; } Item *clone_item(THD *thd); + bool const_is_null() const { return true; } bool is_null() { return 1; } virtual inline void print(String *str, enum_query_type query_type) @@ -3274,6 +3585,12 @@ public: { return result_field->type(); } + Field *create_tmp_field_ex(TABLE *table, Tmp_field_src *src, + const Tmp_field_param *param) + { + DBUG_ASSERT(0); + return NULL; + } void save_in_result_field(bool no_conversions) { save_in_field(result_field, no_conversions); @@ -3341,8 +3658,8 @@ class Item_param :public Item_basic_value, All Item_param::set_xxx() make sure to do so. In the state with an assigned value: - Item_param::basic_const_item() returns true - - Item::type() returns NULL_ITEM, INT_ITEM, REAL_ITEM, DECIMAL_ITEM, - DATE_ITEM, STRING_ITEM, depending on the value assigned. + - Item::type() returns NULL_ITEM or CONST_ITEM, + depending on the value assigned. So in this state Item_param behaves in many cases like a literal. When Item_param::cleanup() is called: @@ -3365,14 +3682,6 @@ class Item_param :public Item_basic_value, DEFAULT_VALUE, IGNORE_VALUE } state; - enum Type item_type; - - void fix_type(Type type) - { - item_type= type; - fixed= true; - } - void fix_temporal(uint32 max_length_arg, uint decimals_arg); struct CONVERSION_INFO @@ -3471,7 +3780,6 @@ class Item_param :public Item_basic_value, PValue value; const String *value_query_val_str(THD *thd, String* str) const; - bool value_eq(const Item *item, bool binary_cmp) const; Item *value_clone_item(THD *thd); bool can_return_value() const; @@ -3495,10 +3803,58 @@ public: enum Type type() const { - DBUG_ASSERT(fixed || state == NO_VALUE); - return item_type; + // Don't pretend to be a constant unless value for this item is set. + switch (state) { + case NO_VALUE: return PARAM_ITEM; + case NULL_VALUE: return NULL_ITEM; + case SHORT_DATA_VALUE: return CONST_ITEM; + case LONG_DATA_VALUE: return CONST_ITEM; + case DEFAULT_VALUE: return PARAM_ITEM; + case IGNORE_VALUE: return PARAM_ITEM; + } + DBUG_ASSERT(0); + return PARAM_ITEM; } + bool is_order_clause_position() const + { + return state == SHORT_DATA_VALUE && + type_handler()->is_order_clause_position_type(); + } + + const Item_const *get_item_const() const + { + switch (state) { + case SHORT_DATA_VALUE: + case LONG_DATA_VALUE: + case NULL_VALUE: + return this; + case IGNORE_VALUE: + case DEFAULT_VALUE: + case NO_VALUE: + break; + } + return NULL; + } + + bool const_is_null() const { return state == NULL_VALUE; } + bool can_return_const_value(Item_result type) const + { + return can_return_value() && + value.type_handler()->cmp_type() == type && + type_handler()->cmp_type() == type; + } + const longlong *const_ptr_longlong() const + { return can_return_const_value(INT_RESULT) ? &value.integer : NULL; } + const double *const_ptr_double() const + { return can_return_const_value(REAL_RESULT) ? &value.real : NULL; } + const my_decimal *const_ptr_my_decimal() const + { return can_return_const_value(DECIMAL_RESULT) ? &value.m_decimal : NULL; } + const MYSQL_TIME *const_ptr_mysql_time() const + { return can_return_const_value(TIME_RESULT) ? &value.time : NULL; } + const String *const_ptr_string() const + { return can_return_const_value(STRING_RESULT) ? &value.m_string : NULL; } + double val_real() { return can_return_value() ? value.val_real() : 0e0; @@ -3515,7 +3871,12 @@ public: { return can_return_value() ? value.val_str(str, this) : NULL; } - bool get_date(MYSQL_TIME *tm, ulonglong fuzzydate); + bool get_date(THD *thd, MYSQL_TIME *tm, date_mode_t fuzzydate); + bool val_native(THD *thd, Native *to) + { + return Item_param::type_handler()->Item_param_val_native(thd, this, to); + } + int save_in_field(Field *field, bool no_conversions); void set_default(); @@ -3592,8 +3953,14 @@ public: so no one will use parameters value in fix_fields still parameter is constant during execution. */ + bool const_item() const + { + return state != NO_VALUE; + } virtual table_map used_tables() const - { return state != NO_VALUE ? (table_map)0 : PARAM_TABLE_BIT; } + { + return state != NO_VALUE ? (table_map)0 : PARAM_TABLE_BIT; + } virtual void print(String *str, enum_query_type query_type); bool is_null() { DBUG_ASSERT(state != NO_VALUE); return state == NULL_VALUE; } @@ -3623,12 +3990,6 @@ public: */ Item *safe_charset_converter(THD *thd, CHARSET_INFO *tocs); Item *clone_item(THD *thd); - /* - Implement by-value equality evaluation if parameter value - is set and is a basic constant (integer, real or string). - Otherwise return FALSE. - */ - bool eq(const Item *item, bool binary_cmp) const; void set_param_type_and_swap_value(Item_param *from); Rewritable_query_parameter *get_rewritable_query_parameter() @@ -3676,50 +4037,44 @@ public: longlong value; Item_int(THD *thd, int32 i,size_t length= MY_INT32_NUM_DECIMAL_DIGITS): Item_num(thd), value((longlong) i) - { max_length=(uint32)length; fixed= 1; } + { max_length=(uint32)length; } Item_int(THD *thd, longlong i,size_t length= MY_INT64_NUM_DECIMAL_DIGITS): Item_num(thd), value(i) - { max_length=(uint32)length; fixed= 1; } + { max_length=(uint32)length; } Item_int(THD *thd, ulonglong i, size_t length= MY_INT64_NUM_DECIMAL_DIGITS): Item_num(thd), value((longlong)i) - { max_length=(uint32)length; fixed= 1; unsigned_flag= 1; } + { max_length=(uint32)length; unsigned_flag= 1; } Item_int(THD *thd, const char *str_arg,longlong i,size_t length): Item_num(thd), value(i) { max_length=(uint32)length; name.str= str_arg; name.length= safe_strlen(name.str); - fixed= 1; } Item_int(THD *thd, const char *str_arg,longlong i,size_t length, bool flag): Item_num(thd), value(i) { max_length=(uint32)length; name.str= str_arg; name.length= safe_strlen(name.str); - fixed= 1; unsigned_flag= flag; } Item_int(THD *thd, const char *str_arg, size_t length=64); - enum Type type() const { return INT_ITEM; } const Type_handler *type_handler() const { return type_handler_long_or_longlong(); } - Field *create_tmp_field(bool group, TABLE *table) - { return tmp_table_field_from_field_type(table); } Field *create_field_for_create_select(TABLE *table) { return tmp_table_field_from_field_type(table); } - longlong val_int() { DBUG_ASSERT(fixed == 1); return value; } - longlong val_int_min() const { DBUG_ASSERT(fixed == 1); return value; } - double val_real() { DBUG_ASSERT(fixed == 1); return (double) value; } + const longlong *const_ptr_longlong() const { return &value; } + longlong val_int() { return value; } + longlong val_int_min() const { return value; } + double val_real() { return (double) value; } my_decimal *val_decimal(my_decimal *); String *val_str(String*); int save_in_field(Field *field, bool no_conversions); - bool basic_const_item() const { return 1; } + bool is_order_clause_position() const { return true; } Item *clone_item(THD *thd); virtual void print(String *str, enum_query_type query_type); Item *neg(THD *thd); uint decimal_precision() const { return (uint) (max_length - MY_TEST(value < 0)); } - bool eq(const Item *item, bool binary_cmp) const - { return int_eq(value, item); } Item *get_copy(THD *thd) { return get_item_copy<Item_int>(thd, this); } }; @@ -3735,8 +4090,20 @@ class Item_bool :public Item_int public: Item_bool(THD *thd, const char *str_arg, longlong i): Item_int(thd, str_arg, i, 1) {} - bool is_bool_type() { return true; } + Item_bool(THD *thd, bool i) :Item_int(thd, (longlong) i, 1) { } + bool is_bool_literal() const { return true; } Item *neg_transformer(THD *thd); + const Type_handler *type_handler() const + { return &type_handler_bool; } + const Type_handler *fixed_type_handler() const + { return &type_handler_bool; } + void quick_fix_field() + { + /* + We can get here when Item_bool is created instead of a constant + predicate at various condition optimization stages in sql_select. + */ + } }; @@ -3746,8 +4113,7 @@ public: Item_uint(THD *thd, const char *str_arg, size_t length); Item_uint(THD *thd, ulonglong i): Item_int(thd, i, 10) {} Item_uint(THD *thd, const char *str_arg, longlong i, uint length); - double val_real() - { DBUG_ASSERT(fixed == 1); return ulonglong2double((ulonglong)value); } + double val_real() { return ulonglong2double((ulonglong)value); } String *val_str(String*); Item *clone_item(THD *thd); virtual void print(String *str, enum_query_type query_type); @@ -3768,7 +4134,7 @@ public: longlong val_int(); double val_real() { return (double)val_int(); } void set(longlong packed, enum_mysql_timestamp_type ts_type); - bool get_date(MYSQL_TIME *to, ulonglong fuzzydate) + bool get_date(THD *thd, MYSQL_TIME *to, date_mode_t fuzzydate) { *to= ltime; return false; @@ -3786,24 +4152,26 @@ public: CHARSET_INFO *charset); Item_decimal(THD *thd, const char *str, const my_decimal *val_arg, uint decimal_par, uint length); - Item_decimal(THD *thd, my_decimal *value_par); + Item_decimal(THD *thd, const my_decimal *value_par); Item_decimal(THD *thd, longlong val, bool unsig); Item_decimal(THD *thd, double val, int precision, int scale); Item_decimal(THD *thd, const uchar *bin, int precision, int scale); - enum Type type() const { return DECIMAL_ITEM; } const Type_handler *type_handler() const { return &type_handler_newdecimal; } - longlong val_int(); - double val_real(); - String *val_str(String*); + longlong val_int() { return decimal_value.to_longlong(unsigned_flag); } + double val_real() { return decimal_value.to_double(); } + String *val_str(String *to) { return decimal_value.to_string(to); } my_decimal *val_decimal(my_decimal *val) { return &decimal_value; } + const my_decimal *const_ptr_my_decimal() const { return &decimal_value; } int save_in_field(Field *field, bool no_conversions); - bool basic_const_item() const { return 1; } Item *clone_item(THD *thd); - virtual void print(String *str, enum_query_type query_type); + virtual void print(String *str, enum_query_type query_type) + { + decimal_value.to_string(&str_value); + str->append(str_value); + } Item *neg(THD *thd); uint decimal_precision() const { return decimal_value.precision(); } - bool eq(const Item *, bool binary_cmp) const; void set_decimal_value(my_decimal *value_par); Item *get_copy(THD *thd) { return get_item_copy<Item_decimal>(thd, this); } @@ -3823,21 +4191,18 @@ public: name.length= safe_strlen(str); decimals=(uint8) decimal_par; max_length= length; - fixed= 1; } Item_float(THD *thd, double value_par, uint decimal_par): Item_num(thd), presentation(0), value(value_par) { decimals= (uint8) decimal_par; - fixed= 1; } int save_in_field(Field *field, bool no_conversions); - enum Type type() const { return REAL_ITEM; } const Type_handler *type_handler() const { return &type_handler_double; } - double val_real() { DBUG_ASSERT(fixed == 1); return value; } + const double *const_ptr_double() const { return &value; } + double val_real() { return value; } longlong val_int() { - DBUG_ASSERT(fixed == 1); if (value <= (double) LONGLONG_MIN) { return LONGLONG_MIN; @@ -3850,12 +4215,9 @@ public: } String *val_str(String*); my_decimal *val_decimal(my_decimal *); - bool basic_const_item() const { return 1; } Item *clone_item(THD *thd); Item *neg(THD *thd); virtual void print(String *str, enum_query_type query_type); - bool eq(const Item *item, bool binary_cmp) const - { return real_eq(value, item); } Item *get_copy(THD *thd) { return get_item_copy<Item_float>(thd, this); } }; @@ -3882,14 +4244,12 @@ public: }; -class Item_string :public Item_basic_constant +class Item_string :public Item_literal { protected: void fix_from_value(Derivation dv, const Metadata metadata) { fix_charset_and_length(str_value.charset(), dv, metadata); - // it is constant => can be used without fix_fields (and frequently used) - fixed= 1; } void fix_and_set_name_from_value(THD *thd, Derivation dv, const Metadata metadata) @@ -3900,41 +4260,41 @@ protected: protected: /* Just create an item and do not fill string representation */ Item_string(THD *thd, CHARSET_INFO *cs, Derivation dv= DERIVATION_COERCIBLE): - Item_basic_constant(thd) + Item_literal(thd) { collation.set(cs, dv); max_length= 0; set_name(thd, NULL, 0, system_charset_info); decimals= NOT_FIXED_DEC; - fixed= 1; } public: - Item_string(THD *thd, CHARSET_INFO *csi, const char *str_arg, uint length_arg): - Item_basic_constant(thd) + Item_string(THD *thd, CHARSET_INFO *csi, const char *str_arg, uint length_arg) + :Item_literal(thd) { collation.set(csi, DERIVATION_COERCIBLE); set_name(thd, NULL, 0, system_charset_info); decimals= NOT_FIXED_DEC; - fixed= 1; str_value.copy(str_arg, length_arg, csi); max_length= str_value.numchars() * csi->mbmaxlen; } // Constructors with the item name set from its value Item_string(THD *thd, const char *str, uint length, CHARSET_INFO *cs, - Derivation dv, uint repertoire): Item_basic_constant(thd) + Derivation dv, uint repertoire) + :Item_literal(thd) { str_value.set_or_copy_aligned(str, length, cs); fix_and_set_name_from_value(thd, dv, Metadata(&str_value, repertoire)); } Item_string(THD *thd, const char *str, size_t length, - CHARSET_INFO *cs, Derivation dv= DERIVATION_COERCIBLE): - Item_basic_constant(thd) + CHARSET_INFO *cs, Derivation dv= DERIVATION_COERCIBLE) + :Item_literal(thd) { str_value.set_or_copy_aligned(str, length, cs); fix_and_set_name_from_value(thd, dv, Metadata(&str_value)); } Item_string(THD *thd, const String *str, CHARSET_INFO *tocs, uint *conv_errors, - Derivation dv, uint repertoire): Item_basic_constant(thd) + Derivation dv, uint repertoire) + :Item_literal(thd) { if (str_value.copy(str, tocs, conv_errors)) str_value.set("", 0, tocs); // EOM ? @@ -3943,16 +4303,16 @@ public: } // Constructors with an externally provided item name Item_string(THD *thd, const char *name_par, const char *str, size_t length, - CHARSET_INFO *cs, Derivation dv= DERIVATION_COERCIBLE): - Item_basic_constant(thd) + CHARSET_INFO *cs, Derivation dv= DERIVATION_COERCIBLE) + :Item_literal(thd) { str_value.set_or_copy_aligned(str, length, cs); fix_from_value(dv, Metadata(&str_value)); set_name(thd, name_par,safe_strlen(name_par), system_charset_info); } Item_string(THD *thd, const char *name_par, const char *str, size_t length, - CHARSET_INFO *cs, Derivation dv, uint repertoire): - Item_basic_constant(thd) + CHARSET_INFO *cs, Derivation dv, uint repertoire) + :Item_literal(thd) { str_value.set_or_copy_aligned(str, length, cs); fix_from_value(dv, Metadata(&str_value, repertoire)); @@ -3962,26 +4322,23 @@ public: { str_value.print(to); } - enum Type type() const { return STRING_ITEM; } double val_real(); longlong val_int(); + const String *const_ptr_string() const + { + return &str_value; + } String *val_str(String*) { - DBUG_ASSERT(fixed == 1); return (String*) &str_value; } my_decimal *val_decimal(my_decimal *); - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate) + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) { - return get_date_from_string(ltime, fuzzydate); + return get_date_from_string(thd, ltime, fuzzydate); } int save_in_field(Field *field, bool no_conversions); const Type_handler *type_handler() const { return &type_handler_varchar; } - bool basic_const_item() const { return 1; } - bool eq(const Item *item, bool binary_cmp) const - { - return str_eq(&str_value, item, binary_cmp); - } Item *clone_item(THD *thd); Item *safe_charset_converter(THD *thd, CHARSET_INFO *tocs) { @@ -3993,7 +4350,6 @@ public: max_length= str_value.numchars() * collation.collation->mbmaxlen; } virtual void print(String *str, enum_query_type query_type); - bool check_partition_func_processor(void *int_arg) {return FALSE;} /** Return TRUE if character-set-introducer was explicitly specified in the @@ -4022,34 +4378,6 @@ public: String *check_well_formed_result(bool send_error) { return Item::check_well_formed_result(&str_value, send_error); } - enum_field_types odbc_temporal_literal_type(const LEX_CSTRING *type_str) const - { - /* - If string is a reasonably short pure ASCII string literal, - try to parse known ODBC style date, time or timestamp literals, - e.g: - SELECT {d'2001-01-01'}; - SELECT {t'10:20:30'}; - SELECT {ts'2001-01-01 10:20:30'}; - */ - if (collation.repertoire == MY_REPERTOIRE_ASCII && - str_value.length() < MAX_DATE_STRING_REP_LENGTH * 4) - { - if (type_str->length == 1) - { - if (type_str->str[0] == 'd') /* {d'2001-01-01'} */ - return MYSQL_TYPE_DATE; - else if (type_str->str[0] == 't') /* {t'10:20:30'} */ - return MYSQL_TYPE_TIME; - } - else if (type_str->length == 2) /* {ts'2001-01-01 10:20:30'} */ - { - if (type_str->str[0] == 't' && type_str->str[1] == 's') - return MYSQL_TYPE_DATETIME; - } - } - return MYSQL_TYPE_STRING; // Not a temporal literal - } Item_basic_constant *make_string_literal_concat(THD *thd, const LEX_CSTRING *); Item *make_odbc_literal(THD *thd, const LEX_CSTRING *typestr); @@ -4236,38 +4564,30 @@ public: /** Item_hex_constant -- a common class for hex literals: X'HHHH' and 0xHHHH */ -class Item_hex_constant: public Item_basic_constant +class Item_hex_constant: public Item_literal { private: void hex_string_init(THD *thd, const char *str, size_t str_length); public: - Item_hex_constant(THD *thd): Item_basic_constant(thd) + Item_hex_constant(THD *thd): Item_literal(thd) { hex_string_init(thd, "", 0); } Item_hex_constant(THD *thd, const char *str, size_t str_length): - Item_basic_constant(thd) + Item_literal(thd) { hex_string_init(thd, str, str_length); } - enum Type type() const { return VARBIN_ITEM; } const Type_handler *type_handler() const { return &type_handler_varchar; } virtual Item *safe_charset_converter(THD *thd, CHARSET_INFO *tocs) { return const_charset_converter(thd, tocs, true); } - bool check_partition_func_processor(void *int_arg) {return FALSE;} - bool basic_const_item() const { return 1; } - bool eq(const Item *item, bool binary_cmp) const - { - return item->basic_const_item() && item->type() == type() && - item->cast_to_int_type_handler() == cast_to_int_type_handler() && - str_value.bin_eq(&((Item_hex_constant*)item)->str_value); - } - String *val_str(String*) { DBUG_ASSERT(fixed == 1); return &str_value; } - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate) + const String *const_ptr_string() const { return &str_value; } + String *val_str(String*) { return &str_value; } + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) { - return type_handler()->Item_get_date(this, ltime, fuzzydate); + return type_handler()->Item_get_date_with_warn(thd, this, ltime, fuzzydate); } }; @@ -4283,22 +4603,18 @@ public: Item_hex_hybrid(THD *thd): Item_hex_constant(thd) {} Item_hex_hybrid(THD *thd, const char *str, size_t str_length): Item_hex_constant(thd, str, str_length) {} + const Type_handler *type_handler() const { return &type_handler_hex_hybrid; } uint decimal_precision() const; double val_real() { - DBUG_ASSERT(fixed == 1); return (double) (ulonglong) Item_hex_hybrid::val_int(); } longlong val_int() { - // following assert is redundant, because fixed=1 assigned in constructor - DBUG_ASSERT(fixed == 1); return longlong_from_hex_hybrid(str_value.ptr(), str_value.length()); } my_decimal *val_decimal(my_decimal *decimal_value) { - // following assert is redundant, because fixed=1 assigned in constructor - DBUG_ASSERT(fixed == 1); longlong value= Item_hex_hybrid::val_int(); int2my_decimal(E_DEC_FATAL_ERROR, value, TRUE, decimal_value); return decimal_value; @@ -4308,14 +4624,6 @@ public: field->set_notnull(); return field->store_hex_hybrid(str_value.ptr(), str_value.length()); } - const Type_handler *cast_to_int_type_handler() const - { - return &type_handler_longlong; - } - const Type_handler *type_handler_for_system_time() const - { - return &type_handler_longlong; - } void print(String *str, enum_query_type query_type); Item *get_copy(THD *thd) { return get_item_copy<Item_hex_hybrid>(thd, this); } @@ -4339,12 +4647,10 @@ public: Item_hex_constant(thd, str, str_length) {} longlong val_int() { - DBUG_ASSERT(fixed == 1); return longlong_from_string_with_check(&str_value); } double val_real() { - DBUG_ASSERT(fixed == 1); return double_from_string_with_check(&str_value); } my_decimal *val_decimal(my_decimal *decimal_value) @@ -4370,7 +4676,55 @@ public: }; -class Item_temporal_literal :public Item_basic_constant +class Item_timestamp_literal: public Item_literal +{ + Timestamp_or_zero_datetime m_value; +public: + Item_timestamp_literal(THD *thd) + :Item_literal(thd) + { } + const Type_handler *type_handler() const { return &type_handler_timestamp2; } + int save_in_field(Field *field, bool no_conversions) + { + Timestamp_or_zero_datetime_native native(m_value, decimals); + return native.save_in_field(field, decimals); + } + longlong val_int() + { + return m_value.to_datetime(current_thd).to_longlong(); + } + double val_real() + { + return m_value.to_datetime(current_thd).to_double(); + } + String *val_str(String *to) + { + return m_value.to_datetime(current_thd).to_string(to, decimals); + } + my_decimal *val_decimal(my_decimal *to) + { + return m_value.to_datetime(current_thd).to_decimal(to); + } + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) + { + bool res= m_value.to_TIME(thd, ltime, fuzzydate); + DBUG_ASSERT(!res); + return res; + } + bool val_native(THD *thd, Native *to) + { + return m_value.to_native(to, decimals); + } + void set_value(const Timestamp_or_zero_datetime &value) + { + m_value= value; + } + Item *get_copy(THD *thd) + { return get_item_copy<Item_timestamp_literal>(thd, this); } +}; + + +class Item_temporal_literal :public Item_literal { protected: MYSQL_TIME cached_time; @@ -4380,37 +4734,21 @@ public: @param ltime DATE value. */ Item_temporal_literal(THD *thd, const MYSQL_TIME *ltime) - :Item_basic_constant(thd) + :Item_literal(thd) { collation.set(&my_charset_numeric, DERIVATION_NUMERIC, MY_REPERTOIRE_ASCII); decimals= 0; cached_time= *ltime; } Item_temporal_literal(THD *thd, const MYSQL_TIME *ltime, uint dec_arg): - Item_basic_constant(thd) + Item_literal(thd) { collation.set(&my_charset_numeric, DERIVATION_NUMERIC, MY_REPERTOIRE_ASCII); decimals= dec_arg; cached_time= *ltime; } - bool basic_const_item() const { return true; } - bool const_item() const { return true; } - enum Type type() const { return DATE_ITEM; } - bool eq(const Item *item, bool binary_cmp) const; - bool check_partition_func_processor(void *int_arg) {return FALSE;} - - bool is_null() - { return is_null_from_temporal(); } - bool get_date_with_sql_mode(MYSQL_TIME *to); - String *val_str(String *str) - { return val_string_from_date(str); } - longlong val_int() - { return val_int_from_date(); } - double val_real() - { return val_real_from_date(); } - my_decimal *val_decimal(my_decimal *decimal_value) - { return val_decimal_from_date(decimal_value); } + const MYSQL_TIME *const_ptr_mysql_time() const { return &cached_time; } int save_in_field(Field *field, bool no_conversions) { return save_date_in_field(field, no_conversions); } }; @@ -4426,7 +4764,6 @@ public: :Item_temporal_literal(thd, ltime) { max_length= MAX_DATE_WIDTH; - fixed= 1; /* If date has zero month or day, it can return NULL in case of NO_ZERO_DATE or NO_ZERO_IN_DATE. @@ -4439,7 +4776,11 @@ public: const Type_handler *type_handler() const { return &type_handler_newdate; } void print(String *str, enum_query_type query_type); Item *clone_item(THD *thd); - bool get_date(MYSQL_TIME *res, ulonglong fuzzy_date); + longlong val_int() { return Date(this).to_longlong(); } + double val_real() { return Date(this).to_double(); } + String *val_str(String *to) { return Date(this).to_string(to); } + my_decimal *val_decimal(my_decimal *to) { return Date(this).to_decimal(to); } + bool get_date(THD *thd, MYSQL_TIME *res, date_mode_t fuzzydate); Item *get_copy(THD *thd) { return get_item_copy<Item_date_literal>(thd, this); } }; @@ -4455,12 +4796,15 @@ public: Item_temporal_literal(thd, ltime, dec_arg) { max_length= MIN_TIME_WIDTH + (decimals ? decimals + 1 : 0); - fixed= 1; } const Type_handler *type_handler() const { return &type_handler_time2; } void print(String *str, enum_query_type query_type); Item *clone_item(THD *thd); - bool get_date(MYSQL_TIME *res, ulonglong fuzzy_date); + longlong val_int() { return Time(this).to_longlong(); } + double val_real() { return Time(this).to_double(); } + String *val_str(String *to) { return Time(this).to_string(to, decimals); } + my_decimal *val_decimal(my_decimal *to) { return Time(this).to_decimal(to); } + bool get_date(THD *thd, MYSQL_TIME *res, date_mode_t fuzzydate); Item *get_copy(THD *thd) { return get_item_copy<Item_time_literal>(thd, this); } }; @@ -4476,14 +4820,23 @@ public: Item_temporal_literal(thd, ltime, dec_arg) { max_length= MAX_DATETIME_WIDTH + (decimals ? decimals + 1 : 0); - fixed= 1; // See the comment on maybe_null in Item_date_literal maybe_null= !ltime->month || !ltime->day; } const Type_handler *type_handler() const { return &type_handler_datetime2; } void print(String *str, enum_query_type query_type); Item *clone_item(THD *thd); - bool get_date(MYSQL_TIME *res, ulonglong fuzzy_date); + longlong val_int() { return Datetime(this).to_longlong(); } + double val_real() { return Datetime(this).to_double(); } + String *val_str(String *to) + { + return Datetime(this).to_string(to, decimals); + } + my_decimal *val_decimal(my_decimal *to) + { + return Datetime(this).to_decimal(to); + } + bool get_date(THD *thd, MYSQL_TIME *res, date_mode_t fuzzydate); Item *get_copy(THD *thd) { return get_item_copy<Item_datetime_literal>(thd, this); } }; @@ -4520,7 +4873,7 @@ class Item_date_literal_for_invalid_dates: public Item_date_literal public: Item_date_literal_for_invalid_dates(THD *thd, const MYSQL_TIME *ltime) :Item_date_literal(thd, ltime) { } - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzy_date) + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) { *ltime= cached_time; return (null_value= false); @@ -4538,7 +4891,7 @@ public: Item_datetime_literal_for_invalid_dates(THD *thd, const MYSQL_TIME *ltime, uint dec_arg) :Item_datetime_literal(thd, ltime, dec_arg) { } - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzy_date) + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) { *ltime= cached_time; return (null_value= false); @@ -4733,8 +5086,10 @@ struct st_sp_security_context; class Item_sp { -public: +protected: + // Can be NULL in some non-SELECT queries Name_resolution_context *context; +public: sp_name *m_name; sp_head *m_sp; TABLE *dummy_table; @@ -4756,9 +5111,15 @@ public: bool execute_impl(THD *thd, Item **args, uint arg_count); bool init_result_field(THD *thd, uint max_length, uint maybe_null, bool *null_value, LEX_CSTRING *name); + void process_error(THD *thd) + { + if (context) + context->process_error(thd); + } }; -class Item_ref :public Item_ident +class Item_ref :public Item_ident, + protected With_sum_func_cache { protected: void set_properties(); @@ -4794,7 +5155,8 @@ public: /* Constructor need to process subselect with temporary tables (see Item) */ Item_ref(THD *thd, Item_ref *item) - :Item_ident(thd, item), set_properties_only(0), ref(item->ref) {} + :Item_ident(thd, item), With_sum_func_cache(*item), + set_properties_only(0), ref(item->ref) {} enum Type type() const { return REF_ITEM; } enum Type real_type() const { return ref ? (*ref)->type() : REF_ITEM; } @@ -4810,11 +5172,13 @@ public: my_decimal *val_decimal(my_decimal *); bool val_bool(); String *val_str(String* tmp); + bool val_native(THD *thd, Native *to); bool is_null(); - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate); + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate); double val_result(); longlong val_int_result(); String *str_result(String* tmp); + bool val_native_result(THD *thd, Native *to); my_decimal *val_decimal_result(my_decimal *); bool val_bool_result(); bool is_null_result(); @@ -4832,6 +5196,9 @@ public: Field *get_tmp_table_field() { return result_field ? result_field : (*ref)->get_tmp_table_field(); } Item *get_tmp_table_item(THD *thd); + Field *create_tmp_field_ex(TABLE *table, Tmp_field_src *src, + const Tmp_field_param *param); + Item* propagate_equal_fields(THD *, const Context &, COND_EQUAL *); table_map used_tables() const; void update_used_tables(); COND *build_equal_items(THD *thd, COND_EQUAL *inherited, @@ -4961,6 +5328,8 @@ public: } bool excl_dep_on_grouping_fields(st_select_lex *sel) { return (*ref)->excl_dep_on_grouping_fields(sel); } + bool excl_dep_on_in_subq_left_part(Item_in_subselect *subq_pred) + { return (*ref)->excl_dep_on_in_subq_left_part(subq_pred); } bool cleanup_excluding_fields_processor(void *arg) { Item *item= real_item(); @@ -4977,6 +5346,15 @@ public: return 0; return cleanup_processor(arg); } + bool with_sum_func() const { return m_with_sum_func; } + With_sum_func_cache* get_with_sum_func_cache() { return this; } + Item *field_transformer_for_having_pushdown(THD *thd, uchar *arg) + { return (*ref)->field_transformer_for_having_pushdown(thd, arg); } + Item *remove_item_direct_ref() + { + *ref= (*ref)->remove_item_direct_ref(); + return this; + } }; @@ -5013,13 +5391,16 @@ public: double val_real(); longlong val_int(); String *val_str(String* tmp); + bool val_native(THD *thd, Native *to); my_decimal *val_decimal(my_decimal *); bool val_bool(); bool is_null(); - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate); + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate); virtual Ref_Type ref_type() { return DIRECT_REF; } Item *get_copy(THD *thd) { return get_item_copy<Item_direct_ref>(thd, this); } + Item *remove_item_direct_ref() + { return (*ref)->remove_item_direct_ref(); } }; @@ -5064,7 +5445,8 @@ class Expression_cache_tracker; */ class Item_cache_wrapper :public Item_result_field, - public With_subquery_cache + public With_subquery_cache, + protected With_sum_func_cache { private: /* Pointer on the cached expression */ @@ -5092,6 +5474,8 @@ public: enum Type type() const { return EXPR_CACHE_ITEM; } enum Type real_type() const { return orig_item->type(); } bool with_subquery() const { DBUG_ASSERT(fixed); return m_with_subquery; } + bool with_sum_func() const { return m_with_sum_func; } + With_sum_func_cache* get_with_sum_func_cache() { return this; } bool set_cache(THD *thd); Expression_cache_tracker* init_tracker(MEM_ROOT *mem_root); @@ -5106,10 +5490,11 @@ public: double val_real(); longlong val_int(); String *val_str(String* tmp); + bool val_native(THD *thd, Native *to); my_decimal *val_decimal(my_decimal *); bool val_bool(); bool is_null(); - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate); + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate); bool send(Protocol *protocol, st_value *buffer); void save_org_in_field(Field *field, fast_field_copier data __attribute__ ((__unused__))) @@ -5267,10 +5652,12 @@ public: } bool excl_dep_on_table(table_map tab_map); bool excl_dep_on_grouping_fields(st_select_lex *sel); + bool excl_dep_on_in_subq_left_part(Item_in_subselect *subq_pred); Item *derived_field_transformer_for_having(THD *thd, uchar *arg); Item *derived_field_transformer_for_where(THD *thd, uchar *arg); - Item *derived_grouping_field_transformer_for_where(THD *thd, - uchar *arg); + Item *grouping_field_transformer_for_where(THD *thd, uchar *arg); + Item *in_subq_field_transformer_for_where(THD *thd, uchar *arg); + Item *in_subq_field_transformer_for_having(THD *thd, uchar *arg); void save_val(Field *to) { @@ -5300,6 +5687,12 @@ public: else return Item_direct_ref::val_str(tmp); } + bool val_native(THD *thd, Native *to) + { + if (check_null_ref()) + return true; + return Item_direct_ref::val_native(thd, to); + } my_decimal *val_decimal(my_decimal *tmp) { if (check_null_ref()) @@ -5321,14 +5714,14 @@ public: else return Item_direct_ref::is_null(); } - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate) + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) { if (check_null_ref()) { bzero((char*) ltime,sizeof(*ltime)); return 1; } - return Item_direct_ref::get_date(ltime, fuzzydate); + return Item_direct_ref::get_date(thd, ltime, fuzzydate); } bool send(Protocol *protocol, st_value *buffer); void save_org_in_field(Field *field, @@ -5355,6 +5748,9 @@ public: } Item *get_copy(THD *thd) { return get_item_copy<Item_direct_view_ref>(thd, this); } + Item *field_transformer_for_having_pushdown(THD *thd, uchar *arg) + { return this; } + Item *remove_item_direct_ref() { return this; } }; @@ -5444,7 +5840,8 @@ public: String* val_str(String* s); my_decimal *val_decimal(my_decimal *); bool val_bool(); - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate); + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate); + bool val_native(THD *thd, Native *to); virtual void print(String *str, enum_query_type query_type); table_map used_tables() const; Item *get_copy(THD *thd) @@ -5536,12 +5933,12 @@ protected: */ Item_copy(THD *thd, Item *i): Item(thd) { + DBUG_ASSERT(i->is_fixed()); item= i; null_value=maybe_null=item->maybe_null; Type_std_attributes::set(item); name= item->name; set_handler(item->type_handler()); - fixed= item->fixed; } public: @@ -5562,6 +5959,12 @@ public: const Type_handler *type_handler() const { return Type_handler_hybrid_field_type::type_handler(); } + Field *create_tmp_field_ex(TABLE *table, Tmp_field_src *src, + const Tmp_field_param *param) + { + DBUG_ASSERT(0); + return NULL; + } void make_send_field(THD *thd, Send_field *field) { item->make_send_field(thd, field); } table_map used_tables() const { return (table_map) 1L; } @@ -5603,8 +6006,8 @@ public: my_decimal *val_decimal(my_decimal *); double val_real(); longlong val_int(); - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate) - { return get_date_from_string(ltime, fuzzydate); } + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) + { return get_date_from_string(thd, ltime, fuzzydate); } void copy(); int save_in_field(Field *field, bool no_conversions); Item *get_copy(THD *thd) @@ -5612,6 +6015,76 @@ public: }; +/** + We need a separate class Item_copy_timestamp because + TIMESTAMP->string->TIMESTAMP conversion is not round trip safe + near the DST change, e.g. '2010-10-31 02:25:26' can mean: + - my_time_t(1288477526) - summer time in Moscow + - my_time_t(1288481126) - winter time in Moscow, one hour later +*/ +class Item_copy_timestamp: public Item_copy +{ + Timestamp_or_zero_datetime m_value; + bool sane() const { return !null_value || m_value.is_zero_datetime(); } +public: + Item_copy_timestamp(THD *thd, Item *arg): Item_copy(thd, arg) { } + const Type_handler *type_handler() const { return &type_handler_timestamp2; } + void copy() + { + Timestamp_or_zero_datetime_native_null tmp(current_thd, item, false); + null_value= tmp.is_null(); + m_value= tmp.is_null() ? Timestamp_or_zero_datetime() : + Timestamp_or_zero_datetime(tmp); + } + int save_in_field(Field *field, bool no_conversions) + { + DBUG_ASSERT(sane()); + if (null_value) + return set_field_to_null(field); + Timestamp_or_zero_datetime_native native(m_value, decimals); + return native.save_in_field(field, decimals); + } + longlong val_int() + { + DBUG_ASSERT(sane()); + return null_value ? 0 : + m_value.to_datetime(current_thd).to_longlong(); + } + double val_real() + { + DBUG_ASSERT(sane()); + return null_value ? 0e0 : + m_value.to_datetime(current_thd).to_double(); + } + String *val_str(String *to) + { + DBUG_ASSERT(sane()); + return null_value ? NULL : + m_value.to_datetime(current_thd).to_string(to, decimals); + } + my_decimal *val_decimal(my_decimal *to) + { + DBUG_ASSERT(sane()); + return null_value ? NULL : + m_value.to_datetime(current_thd).to_decimal(to); + } + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) + { + DBUG_ASSERT(sane()); + bool res= m_value.to_TIME(thd, ltime, fuzzydate); + DBUG_ASSERT(!res); + return null_value || res; + } + bool val_native(THD *thd, Native *to) + { + DBUG_ASSERT(sane()); + return null_value || m_value.to_native(to, decimals); + } + Item *get_copy(THD *thd) + { return get_item_copy<Item_copy_timestamp>(thd, this); } +}; + + /* Cached_item_XXX objects are not exactly caches. They do the following: @@ -5745,7 +6218,7 @@ public: double val_real(); longlong val_int(); my_decimal *val_decimal(my_decimal *decimal_value); - bool get_date(MYSQL_TIME *ltime,ulonglong fuzzydate); + bool get_date(THD *thd, MYSQL_TIME *ltime,date_mode_t fuzzydate); bool send(Protocol *protocol, st_value *buffer); int save_in_field(Field *field_arg, bool no_conversions); bool save_in_param(THD *thd, Item_param *param) @@ -5802,7 +6275,7 @@ public: double val_real(); longlong val_int(); my_decimal *val_decimal(my_decimal *decimal_value); - bool get_date(MYSQL_TIME *ltime,ulonglong fuzzydate); + bool get_date(THD *thd, MYSQL_TIME *ltime,date_mode_t fuzzydate); bool send(Protocol *protocol, st_value *buffer); }; @@ -5948,7 +6421,7 @@ public: for any value. */ -class Item_cache: public Item_basic_constant, +class Item_cache: public Item, public Type_handler_hybrid_field_type { protected: @@ -5967,25 +6440,27 @@ protected: cache_value() will set this flag to TRUE. */ bool value_cached; + + table_map used_table_map; public: Item_cache(THD *thd): - Item_basic_constant(thd), + Item(thd), Type_handler_hybrid_field_type(&type_handler_string), example(0), cached_field(0), - value_cached(0) + value_cached(0), + used_table_map(0) { - fixed= 1; maybe_null= 1; null_value= 1; } protected: Item_cache(THD *thd, const Type_handler *handler): - Item_basic_constant(thd), + Item(thd), Type_handler_hybrid_field_type(handler), example(0), cached_field(0), - value_cached(0) + value_cached(0), + used_table_map(0) { - fixed= 1; maybe_null= 1; null_value= 1; } @@ -6000,10 +6475,18 @@ public: cached_field= ((Item_field *)item)->field; return 0; }; + + void set_used_tables(table_map map) { used_table_map= map; } + table_map used_tables() const { return used_table_map; } enum Type type() const { return CACHE_ITEM; } const Type_handler *type_handler() const { return Type_handler_hybrid_field_type::type_handler(); } + Field *create_tmp_field_ex(TABLE *table, Tmp_field_src *src, + const Tmp_field_param *param) + { + return create_tmp_field_ex_simple(table, src, param); + } virtual void keep_array() {} virtual void print(String *str, enum_query_type query_type); @@ -6034,7 +6517,7 @@ public: void cleanup() { clear(); - Item_basic_constant::cleanup(); + Item::cleanup(); } /** Check if saved item has a non-NULL value. @@ -6069,6 +6552,8 @@ public: virtual void set_null(); bool walk(Item_processor processor, bool walk_subquery, void *arg) { + if (arg == STOP_PTR) + return FALSE; if (example && example->walk(processor, walk_subquery, arg)) return TRUE; return (this->*processor)(arg); @@ -6086,7 +6571,11 @@ public: { return convert_to_basic_const_item(thd); } Item *derived_field_transformer_for_where(THD *thd, uchar *arg) { return convert_to_basic_const_item(thd); } - Item *derived_grouping_field_transformer_for_where(THD *thd, uchar *arg) + Item *grouping_field_transformer_for_where(THD *thd, uchar *arg) + { return convert_to_basic_const_item(thd); } + Item *in_subq_field_transformer_for_where(THD *thd, uchar *arg) + { return convert_to_basic_const_item(thd); } + Item *in_subq_field_transformer_for_having(THD *thd, uchar *arg) { return convert_to_basic_const_item(thd); } }; @@ -6105,8 +6594,8 @@ public: longlong val_int(); String* val_str(String *str); my_decimal *val_decimal(my_decimal *); - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate) - { return get_date_from_int(ltime, fuzzydate); } + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) + { return get_date_from_int(thd, ltime, fuzzydate); } bool cache_value(); int save_in_field(Field *field, bool no_conversions); Item *convert_to_basic_const_item(THD *thd); @@ -6118,9 +6607,12 @@ public: class Item_cache_year: public Item_cache_int { public: - Item_cache_year(THD *thd): Item_cache_int(thd, &type_handler_year) { } - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate) - { return get_date_from_year(ltime, fuzzydate); } + Item_cache_year(THD *thd, const Type_handler *handler) + :Item_cache_int(thd, handler) { } + bool get_date(THD *thd, MYSQL_TIME *to, date_mode_t mode) + { + return type_handler_year.Item_get_date_with_warn(thd, this, to, mode); + } }; @@ -6129,14 +6621,8 @@ class Item_cache_temporal: public Item_cache_int protected: Item_cache_temporal(THD *thd, const Type_handler *handler); public: - String* val_str(String *str); - my_decimal *val_decimal(my_decimal *); - longlong val_int(); - longlong val_datetime_packed(); - longlong val_time_packed(); - double val_real(); bool cache_value(); - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate); + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate); int save_in_field(Field *field, bool no_conversions); void store_packed(longlong val_arg, Item *example); /* @@ -6159,6 +6645,31 @@ public: Item *get_copy(THD *thd) { return get_item_copy<Item_cache_time>(thd, this); } Item *make_literal(THD *); + longlong val_datetime_packed(THD *thd) + { + Datetime::Options_cmp opt(thd); + return has_value() ? Datetime(thd, this, opt).to_packed() : 0; + } + longlong val_time_packed(THD *thd) + { + return has_value() ? value : 0; + } + longlong val_int() + { + return has_value() ? Time(this).to_longlong() : 0; + } + double val_real() + { + return has_value() ? Time(this).to_double() : 0; + } + String *val_str(String *to) + { + return has_value() ? Time(this).to_string(to, decimals) : NULL; + } + my_decimal *val_decimal(my_decimal *to) + { + return has_value() ? Time(this).to_decimal(to) : NULL; + } }; @@ -6170,6 +6681,30 @@ public: Item *get_copy(THD *thd) { return get_item_copy<Item_cache_datetime>(thd, this); } Item *make_literal(THD *); + longlong val_datetime_packed(THD *thd) + { + return has_value() ? value : 0; + } + longlong val_time_packed(THD *thd) + { + return Time(thd, this, Time::Options_cmp(thd)).to_packed(); + } + longlong val_int() + { + return has_value() ? Datetime(this).to_longlong() : 0; + } + double val_real() + { + return has_value() ? Datetime(this).to_double() : 0; + } + String *val_str(String *to) + { + return has_value() ? Datetime(this).to_string(to, decimals) : NULL; + } + my_decimal *val_decimal(my_decimal *to) + { + return has_value() ? Datetime(this).to_decimal(to) : NULL; + } }; @@ -6181,6 +6716,65 @@ public: Item *get_copy(THD *thd) { return get_item_copy<Item_cache_date>(thd, this); } Item *make_literal(THD *); + longlong val_datetime_packed(THD *thd) + { + return has_value() ? value : 0; + } + longlong val_time_packed(THD *thd) + { + return Time(thd, this, Time::Options_cmp(thd)).to_packed(); + } + longlong val_int() { return has_value() ? Date(this).to_longlong() : 0; } + double val_real() { return has_value() ? Date(this).to_double() : 0; } + String *val_str(String *to) + { + return has_value() ? Date(this).to_string(to) : NULL; + } + my_decimal *val_decimal(my_decimal *to) + { + return has_value() ? Date(this).to_decimal(to) : NULL; + } +}; + + +class Item_cache_timestamp: public Item_cache +{ + Timestamp_or_zero_datetime_native m_native; + Datetime to_datetime(THD *thd); +public: + Item_cache_timestamp(THD *thd) + :Item_cache(thd, &type_handler_timestamp2) { } + Item *get_copy(THD *thd) + { return get_item_copy<Item_cache_timestamp>(thd, this); } + bool cache_value(); + String* val_str(String *to) + { + return to_datetime(current_thd).to_string(to, decimals); + } + my_decimal *val_decimal(my_decimal *to) + { + return to_datetime(current_thd).to_decimal(to); + } + longlong val_int() + { + return to_datetime(current_thd).to_longlong(); + } + double val_real() + { + return to_datetime(current_thd).to_double(); + } + longlong val_datetime_packed(THD *thd) + { + return to_datetime(current_thd).to_packed(); + } + longlong val_time_packed(THD *thd) + { + DBUG_ASSERT(0); + return 0; + } + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate); + int save_in_field(Field *field, bool no_conversions); + bool val_native(THD *thd, Native *to); }; @@ -6195,8 +6789,8 @@ public: longlong val_int(); String* val_str(String *str); my_decimal *val_decimal(my_decimal *); - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate) - { return get_date_from_real(ltime, fuzzydate); } + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) + { return get_date_from_real(thd, ltime, fuzzydate); } bool cache_value(); Item *convert_to_basic_const_item(THD *thd); Item *get_copy(THD *thd) @@ -6215,8 +6809,11 @@ public: longlong val_int(); String* val_str(String *str); my_decimal *val_decimal(my_decimal *); - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate) - { return get_date_from_decimal(ltime, fuzzydate); } + bool get_date(THD *thd, MYSQL_TIME *to, date_mode_t mode) + { + return decimal_to_datetime_with_warn(thd, VDec(this).ptr(), to, mode, + NULL, NULL); + } bool cache_value(); Item *convert_to_basic_const_item(THD *thd); Item *get_copy(THD *thd) @@ -6243,8 +6840,8 @@ public: longlong val_int(); String* val_str(String *); my_decimal *val_decimal(my_decimal *); - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate) - { return get_date_from_string(ltime, fuzzydate); } + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) + { return get_date_from_string(thd, ltime, fuzzydate); } CHARSET_INFO *charset() const { return value->charset(); }; int save_in_field(Field *field, bool no_conversions); bool cache_value(); @@ -6325,7 +6922,7 @@ public: illegal_method_call((const char*)"val_decimal"); return 0; }; - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate) + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) { illegal_method_call((const char*)"val_decimal"); return true; @@ -6374,7 +6971,7 @@ public: Type_handler_hybrid_field_type(item->real_type_handler()), enum_set_typelib(0) { - DBUG_ASSERT(item->fixed); + DBUG_ASSERT(item->is_fixed()); maybe_null= item->maybe_null; } Item_type_holder(THD *thd, @@ -6408,8 +7005,9 @@ public: longlong val_int(); my_decimal *val_decimal(my_decimal *); String *val_str(String*); - bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate); - Field *create_tmp_field(bool group, TABLE *table) + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate); + Field *create_tmp_field_ex(TABLE *table, Tmp_field_src *src, + const Tmp_field_param *param) { return Item_type_holder::real_type_handler()-> make_and_init_table_field(&name, Record_addr(maybe_null), @@ -6539,7 +7137,7 @@ bool fix_escape_item(THD *thd, Item *escape_item, String *tmp_str, inline bool Virtual_column_info::is_equal(const Virtual_column_info* vcol) const { - return field_type == vcol->get_real_type() + return type_handler() == vcol->type_handler() && stored_in_db == vcol->is_stored() && expr->eq(vcol->expr, true); } @@ -6549,4 +7147,39 @@ inline void Virtual_column_info::print(String* str) expr->print_for_table_def(str); } +inline bool TABLE::mark_column_with_deps(Field *field) +{ + bool res; + if (!(res= bitmap_fast_test_and_set(read_set, field->field_index))) + { + if (field->vcol_info) + mark_virtual_column_deps(field); + } + return res; +} + +inline bool TABLE::mark_virtual_column_with_deps(Field *field) +{ + bool res; + DBUG_ASSERT(field->vcol_info); + if (!(res= bitmap_fast_test_and_set(read_set, field->field_index))) + mark_virtual_column_deps(field); + return res; +} + +inline void TABLE::mark_virtual_column_deps(Field *field) +{ + DBUG_ASSERT(field->vcol_info); + DBUG_ASSERT(field->vcol_info->expr); + field->vcol_info->expr->walk(&Item::register_field_in_read_map, 1, 0); +} + +inline void TABLE::use_all_stored_columns() +{ + bitmap_set_all(read_set); + if (Field **vf= vfield) + for (; *vf; vf++) + bitmap_clear_bit(read_set, (*vf)->field_index); +} + #endif /* SQL_ITEM_INCLUDED */ |