/* Copyright (c) 2002, 2016, Oracle and/or its affiliates. Copyright (c) 2009, 2017, MariaDB This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include "sql_priv.h" #include "unireg.h" #include "sp.h" #include "sql_base.h" // close_thread_tables #include "sql_parse.h" // parse_sql #include "key.h" // key_copy #include "sql_show.h" // append_definer, append_identifier #include "sql_db.h" // get_default_db_collation, mysql_opt_change_db, // mysql_change_db, check_db_dir_existence, // load_db_opt_by_name #include "sql_table.h" // write_bin_log #include "sql_acl.h" // SUPER_ACL #include "sp_head.h" #include "sp_cache.h" #include "lock.h" // lock_object_name #include static bool create_string(THD *thd, String *buf, stored_procedure_type sp_type, const char *db, ulong dblen, const char *name, ulong namelen, const char *params, ulong paramslen, const char *returns, ulong returnslen, const char *body, ulong bodylen, st_sp_chistics *chistics, const LEX_STRING *definer_user, const LEX_STRING *definer_host, ulonglong sql_mode); static int db_load_routine(THD *thd, stored_procedure_type type, sp_name *name, sp_head **sphp, ulonglong sql_mode, const char *params, const char *returns, const char *body, st_sp_chistics &chistics, LEX_STRING *definer_user_name, LEX_STRING *definer_host_name, longlong created, longlong modified, Stored_program_creation_ctx *creation_ctx); static const TABLE_FIELD_TYPE proc_table_fields[MYSQL_PROC_FIELD_COUNT] = { { { C_STRING_WITH_LEN("db") }, { C_STRING_WITH_LEN("char(64)") }, { C_STRING_WITH_LEN("utf8") } }, { { C_STRING_WITH_LEN("name") }, { C_STRING_WITH_LEN("char(64)") }, { C_STRING_WITH_LEN("utf8") } }, { { C_STRING_WITH_LEN("type") }, { C_STRING_WITH_LEN("enum('FUNCTION','PROCEDURE')") }, { NULL, 0 } }, { { C_STRING_WITH_LEN("specific_name") }, { C_STRING_WITH_LEN("char(64)") }, { C_STRING_WITH_LEN("utf8") } }, { { C_STRING_WITH_LEN("language") }, { C_STRING_WITH_LEN("enum('SQL')") }, { NULL, 0 } }, { { C_STRING_WITH_LEN("sql_data_access") }, { C_STRING_WITH_LEN("enum('CONTAINS_SQL','NO_SQL','READS_SQL_DATA','MODIFIES_SQL_DATA')") }, { NULL, 0 } }, { { C_STRING_WITH_LEN("is_deterministic") }, { C_STRING_WITH_LEN("enum('YES','NO')") }, { NULL, 0 } }, { { C_STRING_WITH_LEN("security_type") }, { C_STRING_WITH_LEN("enum('INVOKER','DEFINER')") }, { NULL, 0 } }, { { C_STRING_WITH_LEN("param_list") }, { C_STRING_WITH_LEN("blob") }, { NULL, 0 } }, { { C_STRING_WITH_LEN("returns") }, { C_STRING_WITH_LEN("longblob") }, { NULL, 0 } }, { { C_STRING_WITH_LEN("body") }, { C_STRING_WITH_LEN("longblob") }, { NULL, 0 } }, { { C_STRING_WITH_LEN("definer") }, { C_STRING_WITH_LEN("char(") }, { C_STRING_WITH_LEN("utf8") } }, { { C_STRING_WITH_LEN("created") }, { C_STRING_WITH_LEN("timestamp") }, { NULL, 0 } }, { { C_STRING_WITH_LEN("modified") }, { C_STRING_WITH_LEN("timestamp") }, { NULL, 0 } }, { { C_STRING_WITH_LEN("sql_mode") }, { C_STRING_WITH_LEN("set('REAL_AS_FLOAT','PIPES_AS_CONCAT','ANSI_QUOTES'," "'IGNORE_SPACE','IGNORE_BAD_TABLE_OPTIONS','ONLY_FULL_GROUP_BY'," "'NO_UNSIGNED_SUBTRACTION'," "'NO_DIR_IN_CREATE','POSTGRESQL','ORACLE','MSSQL','DB2','MAXDB'," "'NO_KEY_OPTIONS','NO_TABLE_OPTIONS','NO_FIELD_OPTIONS','MYSQL323','MYSQL40'," "'ANSI','NO_AUTO_VALUE_ON_ZERO','NO_BACKSLASH_ESCAPES','STRICT_TRANS_TABLES'," "'STRICT_ALL_TABLES','NO_ZERO_IN_DATE','NO_ZERO_DATE','INVALID_DATES'," "'ERROR_FOR_DIVISION_BY_ZERO','TRADITIONAL','NO_AUTO_CREATE_USER'," "'HIGH_NOT_PRECEDENCE','NO_ENGINE_SUBSTITUTION','PAD_CHAR_TO_FULL_LENGTH')") }, { NULL, 0 } }, { { C_STRING_WITH_LEN("comment") }, { C_STRING_WITH_LEN("text") }, { C_STRING_WITH_LEN("utf8") } }, { { C_STRING_WITH_LEN("character_set_client") }, { C_STRING_WITH_LEN("char(32)") }, { C_STRING_WITH_LEN("utf8") } }, { { C_STRING_WITH_LEN("collation_connection") }, { C_STRING_WITH_LEN("char(32)") }, { C_STRING_WITH_LEN("utf8") } }, { { C_STRING_WITH_LEN("db_collation") }, { C_STRING_WITH_LEN("char(32)") }, { C_STRING_WITH_LEN("utf8") } }, { { C_STRING_WITH_LEN("body_utf8") }, { C_STRING_WITH_LEN("longblob") }, { NULL, 0 } } }; static const TABLE_FIELD_DEF proc_table_def= {MYSQL_PROC_FIELD_COUNT, proc_table_fields, 0, (uint*) 0 }; /*************************************************************************/ /** Stored_routine_creation_ctx -- creation context of stored routines (stored procedures and functions). */ class Stored_routine_creation_ctx : public Stored_program_creation_ctx, public Sql_alloc { public: static Stored_routine_creation_ctx * load_from_db(THD *thd, const sp_name *name, TABLE *proc_tbl); public: virtual Stored_program_creation_ctx *clone(MEM_ROOT *mem_root) { return new (mem_root) Stored_routine_creation_ctx(m_client_cs, m_connection_cl, m_db_cl); } protected: virtual Object_creation_ctx *create_backup_ctx(THD *thd) const { DBUG_ENTER("Stored_routine_creation_ctx::create_backup_ctx"); DBUG_RETURN(new Stored_routine_creation_ctx(thd)); } private: Stored_routine_creation_ctx(THD *thd) : Stored_program_creation_ctx(thd) { } Stored_routine_creation_ctx(CHARSET_INFO *client_cs, CHARSET_INFO *connection_cl, CHARSET_INFO *db_cl) : Stored_program_creation_ctx(client_cs, connection_cl, db_cl) { } }; /************************************************************************** Stored_routine_creation_ctx implementation. **************************************************************************/ bool load_charset(MEM_ROOT *mem_root, Field *field, CHARSET_INFO *dflt_cs, CHARSET_INFO **cs) { String cs_name; if (get_field(mem_root, field, &cs_name)) { *cs= dflt_cs; return TRUE; } *cs= get_charset_by_csname(cs_name.c_ptr(), MY_CS_PRIMARY, MYF(0)); if (*cs == NULL) { *cs= dflt_cs; return TRUE; } return FALSE; } /*************************************************************************/ bool load_collation(MEM_ROOT *mem_root, Field *field, CHARSET_INFO *dflt_cl, CHARSET_INFO **cl) { String cl_name; if (get_field(mem_root, field, &cl_name)) { *cl= dflt_cl; return TRUE; } *cl= get_charset_by_name(cl_name.c_ptr(), MYF(0)); if (*cl == NULL) { *cl= dflt_cl; return TRUE; } return FALSE; } /*************************************************************************/ Stored_routine_creation_ctx * Stored_routine_creation_ctx::load_from_db(THD *thd, const sp_name *name, TABLE *proc_tbl) { /* Load character set/collation attributes. */ CHARSET_INFO *client_cs; CHARSET_INFO *connection_cl; CHARSET_INFO *db_cl; const char *db_name= thd->strmake(name->m_db.str, name->m_db.length); const char *sr_name= thd->strmake(name->m_name.str, name->m_name.length); bool invalid_creation_ctx= FALSE; if (load_charset(thd->mem_root, proc_tbl->field[MYSQL_PROC_FIELD_CHARACTER_SET_CLIENT], thd->variables.character_set_client, &client_cs)) { sql_print_warning("Stored routine '%s'.'%s': invalid value " "in column mysql.proc.character_set_client.", (const char *) db_name, (const char *) sr_name); invalid_creation_ctx= TRUE; } if (load_collation(thd->mem_root, proc_tbl->field[MYSQL_PROC_FIELD_COLLATION_CONNECTION], thd->variables.collation_connection, &connection_cl)) { sql_print_warning("Stored routine '%s'.'%s': invalid value " "in column mysql.proc.collation_connection.", (const char *) db_name, (const char *) sr_name); invalid_creation_ctx= TRUE; } if (load_collation(thd->mem_root, proc_tbl->field[MYSQL_PROC_FIELD_DB_COLLATION], NULL, &db_cl)) { sql_print_warning("Stored routine '%s'.'%s': invalid value " "in column mysql.proc.db_collation.", (const char *) db_name, (const char *) sr_name); invalid_creation_ctx= TRUE; } if (invalid_creation_ctx) { push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN, ER_SR_INVALID_CREATION_CTX, ER(ER_SR_INVALID_CREATION_CTX), (const char *) db_name, (const char *) sr_name); } /* If we failed to retrieve the database collation, load the default one from the disk. */ if (!db_cl) db_cl= get_default_db_collation(thd, name->m_db.str); /* Create the context. */ return new Stored_routine_creation_ctx(client_cs, connection_cl, db_cl); } /*************************************************************************/ class Proc_table_intact : public Table_check_intact { private: bool m_print_once; public: Proc_table_intact() : m_print_once(TRUE) {} protected: void report_error(uint code, const char *fmt, ...); }; /** Report failure to validate the mysql.proc table definition. Print a message to the error log only once. */ void Proc_table_intact::report_error(uint code, const char *fmt, ...) { va_list args; char buf[512]; va_start(args, fmt); my_vsnprintf(buf, sizeof(buf), fmt, args); va_end(args); if (code) my_message(code, buf, MYF(0)); else my_error(ER_CANNOT_LOAD_FROM_TABLE_V2, MYF(0), "mysql", "proc"); if (m_print_once) { m_print_once= FALSE; sql_print_error("%s", buf); } }; /** Single instance used to control printing to the error log. */ static Proc_table_intact proc_table_intact; /** Open the mysql.proc table for read. @param thd Thread context @param backup Pointer to Open_tables_state instance where information about currently open tables will be saved, and from which will be restored when we will end work with mysql.proc. @retval 0 Error @retval \# Pointer to TABLE object of mysql.proc */ TABLE *open_proc_table_for_read(THD *thd, Open_tables_backup *backup) { TABLE_LIST table; DBUG_ENTER("open_proc_table_for_read"); table.init_one_table("mysql", 5, "proc", 4, "proc", TL_READ); if (open_system_tables_for_read(thd, &table, backup)) DBUG_RETURN(NULL); if (!proc_table_intact.check(table.table, &proc_table_def)) DBUG_RETURN(table.table); close_system_tables(thd, backup); DBUG_RETURN(NULL); } /** Open the mysql.proc table for update. @param thd Thread context @note Table opened with this call should closed using close_thread_tables(). @retval 0 Error @retval \# Pointer to TABLE object of mysql.proc */ static TABLE *open_proc_table_for_update(THD *thd) { TABLE_LIST table_list; TABLE *table; MDL_savepoint mdl_savepoint= thd->mdl_context.mdl_savepoint(); DBUG_ENTER("open_proc_table_for_update"); table_list.init_one_table("mysql", 5, "proc", 4, "proc", TL_WRITE); if (!(table= open_system_table_for_update(thd, &table_list))) DBUG_RETURN(NULL); if (!proc_table_intact.check(table, &proc_table_def)) DBUG_RETURN(table); close_thread_tables(thd); thd->mdl_context.rollback_to_savepoint(mdl_savepoint); DBUG_RETURN(NULL); } /** Find row in open mysql.proc table representing stored routine. @param thd Thread context @param type Type of routine to find (function or procedure) @param name Name of routine @param table TABLE object for open mysql.proc table. @retval SP_OK Routine found @retval SP_KEY_NOT_FOUND No routine with given name */ static int db_find_routine_aux(THD *thd, stored_procedure_type type, sp_name *name, TABLE *table) { uchar key[MAX_KEY_LENGTH]; // db, name, optional key length type DBUG_ENTER("db_find_routine_aux"); DBUG_PRINT("enter", ("type: %d name: %.*s", type, (int) name->m_name.length, name->m_name.str)); /* Create key to find row. We have to use field->store() to be able to handle VARCHAR and CHAR fields. Assumption here is that the three first fields in the table are 'db', 'name' and 'type' and the first key is the primary key over the same fields. */ if (name->m_name.length > table->field[1]->field_length) DBUG_RETURN(SP_KEY_NOT_FOUND); table->field[0]->store(name->m_db.str, name->m_db.length, &my_charset_bin); table->field[1]->store(name->m_name.str, name->m_name.length, &my_charset_bin); table->field[2]->store((longlong) type, TRUE); key_copy(key, table->record[0], table->key_info, table->key_info->key_length); if (table->file->ha_index_read_idx_map(table->record[0], 0, key, HA_WHOLE_KEY, HA_READ_KEY_EXACT)) DBUG_RETURN(SP_KEY_NOT_FOUND); DBUG_RETURN(SP_OK); } /** Find routine definition in mysql.proc table and create corresponding sp_head object for it. @param thd Thread context @param type Type of routine (TYPE_ENUM_PROCEDURE/...) @param name Name of routine @param sphp Out parameter in which pointer to created sp_head object is returned (0 in case of error). @note This function may damage current LEX during execution, so it is good idea to create temporary LEX and make it active before calling it. @retval 0 Success @retval non-0 Error (may be one of special codes like SP_KEY_NOT_FOUND) */ static int db_find_routine(THD *thd, stored_procedure_type type, sp_name *name, sp_head **sphp) { TABLE *table; const char *params, *returns, *body; int ret; const char *definer; longlong created; longlong modified; st_sp_chistics chistics; char *ptr; uint length; char buff[65]; String str(buff, sizeof(buff), &my_charset_bin); bool saved_time_zone_used= thd->time_zone_used; ulonglong sql_mode, saved_mode= thd->variables.sql_mode; Open_tables_backup open_tables_state_backup; Stored_program_creation_ctx *creation_ctx; char definer_user_name_holder[USERNAME_LENGTH + 1]; LEX_STRING definer_user_name= { definer_user_name_holder, USERNAME_LENGTH }; char definer_host_name_holder[HOSTNAME_LENGTH + 1]; LEX_STRING definer_host_name= { definer_host_name_holder, HOSTNAME_LENGTH }; DBUG_ENTER("db_find_routine"); DBUG_PRINT("enter", ("type: %d name: %.*s", type, (int) name->m_name.length, name->m_name.str)); *sphp= 0; // In case of errors if (!(table= open_proc_table_for_read(thd, &open_tables_state_backup))) DBUG_RETURN(SP_OPEN_TABLE_FAILED); /* Reset sql_mode during data dictionary operations. */ thd->variables.sql_mode= 0; if ((ret= db_find_routine_aux(thd, type, name, table)) != SP_OK) goto done; if (table->s->fields < MYSQL_PROC_FIELD_COUNT) { ret= SP_GET_FIELD_FAILED; goto done; } bzero((char *)&chistics, sizeof(chistics)); if ((ptr= get_field(thd->mem_root, table->field[MYSQL_PROC_FIELD_ACCESS])) == NULL) { ret= SP_GET_FIELD_FAILED; goto done; } switch (ptr[0]) { case 'N': chistics.daccess= SP_NO_SQL; break; case 'C': chistics.daccess= SP_CONTAINS_SQL; break; case 'R': chistics.daccess= SP_READS_SQL_DATA; break; case 'M': chistics.daccess= SP_MODIFIES_SQL_DATA; break; default: chistics.daccess= SP_DEFAULT_ACCESS_MAPPING; } if ((ptr= get_field(thd->mem_root, table->field[MYSQL_PROC_FIELD_DETERMINISTIC])) == NULL) { ret= SP_GET_FIELD_FAILED; goto done; } chistics.detistic= (ptr[0] == 'N' ? FALSE : TRUE); if ((ptr= get_field(thd->mem_root, table->field[MYSQL_PROC_FIELD_SECURITY_TYPE])) == NULL) { ret= SP_GET_FIELD_FAILED; goto done; } chistics.suid= (ptr[0] == 'I' ? SP_IS_NOT_SUID : SP_IS_SUID); if ((params= get_field(thd->mem_root, table->field[MYSQL_PROC_FIELD_PARAM_LIST])) == NULL) { params= ""; } if (type == TYPE_ENUM_PROCEDURE) returns= ""; else if ((returns= get_field(thd->mem_root, table->field[MYSQL_PROC_FIELD_RETURNS])) == NULL) { ret= SP_GET_FIELD_FAILED; goto done; } if ((body= get_field(thd->mem_root, table->field[MYSQL_PROC_FIELD_BODY])) == NULL) { ret= SP_GET_FIELD_FAILED; goto done; } // Get additional information if ((definer= get_field(thd->mem_root, table->field[MYSQL_PROC_FIELD_DEFINER])) == NULL) { ret= SP_GET_FIELD_FAILED; goto done; } modified= table->field[MYSQL_PROC_FIELD_MODIFIED]->val_int(); created= table->field[MYSQL_PROC_FIELD_CREATED]->val_int(); sql_mode= (ulong) table->field[MYSQL_PROC_FIELD_SQL_MODE]->val_int(); table->field[MYSQL_PROC_FIELD_COMMENT]->val_str(&str, &str); ptr= 0; if ((length= str.length())) ptr= thd->strmake(str.ptr(), length); chistics.comment.str= ptr; chistics.comment.length= length; creation_ctx= Stored_routine_creation_ctx::load_from_db(thd, name, table); close_system_tables(thd, &open_tables_state_backup); table= 0; if (parse_user(definer, strlen(definer), definer_user_name.str, &definer_user_name.length, definer_host_name.str, &definer_host_name.length) && definer_user_name.length && !definer_host_name.length) { // 'user@' -> 'user@%' definer_host_name= host_not_specified; } ret= db_load_routine(thd, type, name, sphp, sql_mode, params, returns, body, chistics, &definer_user_name, &definer_host_name, created, modified, creation_ctx); done: /* Restore the time zone flag as the timezone usage in proc table does not affect replication. */ thd->time_zone_used= saved_time_zone_used; if (table) close_system_tables(thd, &open_tables_state_backup); thd->variables.sql_mode= saved_mode; DBUG_RETURN(ret); } /** Silence DEPRECATED SYNTAX warnings when loading a stored procedure into the cache. */ struct Silence_deprecated_warning : public Internal_error_handler { public: virtual bool handle_condition(THD *thd, uint sql_errno, const char* sqlstate, Sql_condition::enum_warning_level level, const char* msg, Sql_condition ** cond_hdl); }; bool Silence_deprecated_warning::handle_condition( THD *, uint sql_errno, const char*, Sql_condition::enum_warning_level level, const char*, Sql_condition ** cond_hdl) { *cond_hdl= NULL; if (sql_errno == ER_WARN_DEPRECATED_SYNTAX && level == Sql_condition::WARN_LEVEL_WARN) return TRUE; return FALSE; } /** @brief The function parses input strings and returns SP stucture. @param[in] thd Thread handler @param[in] defstr CREATE... string @param[in] sql_mode SQL mode @param[in] creation_ctx Creation context of stored routines @return Pointer on sp_head struct @retval # Pointer on sp_head struct @retval 0 error */ static sp_head *sp_compile(THD *thd, String *defstr, ulonglong sql_mode, Stored_program_creation_ctx *creation_ctx) { sp_head *sp; ulonglong old_sql_mode= thd->variables.sql_mode; ha_rows old_select_limit= thd->variables.select_limit; sp_rcontext *old_spcont= thd->spcont; Silence_deprecated_warning warning_handler; Parser_state parser_state; thd->variables.sql_mode= sql_mode; thd->variables.select_limit= HA_POS_ERROR; if (parser_state.init(thd, defstr->c_ptr_safe(), defstr->length())) { thd->variables.sql_mode= old_sql_mode; thd->variables.select_limit= old_select_limit; return NULL; } lex_start(thd); thd->push_internal_handler(&warning_handler); thd->spcont= 0; if (parse_sql(thd, & parser_state, creation_ctx) || thd->lex == NULL) { sp= thd->lex->sphead; delete sp; sp= 0; } else { sp= thd->lex->sphead; } thd->pop_internal_handler(); thd->spcont= old_spcont; thd->variables.sql_mode= old_sql_mode; thd->variables.select_limit= old_select_limit; return sp; } class Bad_db_error_handler : public Internal_error_handler { public: Bad_db_error_handler() :m_error_caught(false) {} virtual bool handle_condition(THD *thd, uint sql_errno, const char* sqlstate, Sql_condition::enum_warning_level level, const char* message, Sql_condition ** cond_hdl); bool error_caught() const { return m_error_caught; } private: bool m_error_caught; }; bool Bad_db_error_handler::handle_condition(THD *thd, uint sql_errno, const char* sqlstate, Sql_condition::enum_warning_level level, const char* message, Sql_condition ** cond_hdl) { if (sql_errno == ER_BAD_DB_ERROR) { m_error_caught= true; return true; } return false; } static int db_load_routine(THD *thd, stored_procedure_type type, sp_name *name, sp_head **sphp, ulonglong sql_mode, const char *params, const char *returns, const char *body, st_sp_chistics &chistics, LEX_STRING *definer_user_name, LEX_STRING *definer_host_name, longlong created, longlong modified, Stored_program_creation_ctx *creation_ctx) { LEX *old_lex= thd->lex, newlex; String defstr; char saved_cur_db_name_buf[SAFE_NAME_LEN+1]; LEX_STRING saved_cur_db_name= { saved_cur_db_name_buf, sizeof(saved_cur_db_name_buf) }; bool cur_db_changed; Bad_db_error_handler db_not_exists_handler; int ret= 0; thd->lex= &newlex; newlex.current_select= NULL; defstr.set_charset(creation_ctx->get_client_cs()); /* We have to add DEFINER clause and provide proper routine characterstics in routine definition statement that we build here to be able to use this definition for SHOW CREATE PROCEDURE later. */ if (!create_string(thd, &defstr, type, NULL, 0, name->m_name.str, name->m_name.length, params, strlen(params), returns, strlen(returns), body, strlen(body), &chistics, definer_user_name, definer_host_name, sql_mode)) { ret= SP_INTERNAL_ERROR; goto end; } thd->push_internal_handler(&db_not_exists_handler); /* Change the current database (if needed). TODO: why do we force switch here? */ if (mysql_opt_change_db(thd, &name->m_db, &saved_cur_db_name, TRUE, &cur_db_changed)) { ret= SP_INTERNAL_ERROR; thd->pop_internal_handler(); goto end; } thd->pop_internal_handler(); if (db_not_exists_handler.error_caught()) { ret= SP_INTERNAL_ERROR; my_error(ER_BAD_DB_ERROR, MYF(0), name->m_db.str); goto end; } { *sphp= sp_compile(thd, &defstr, sql_mode, creation_ctx); /* Force switching back to the saved current database (if changed), because it may be NULL. In this case, mysql_change_db() would generate an error. */ if (cur_db_changed && mysql_change_db(thd, &saved_cur_db_name, TRUE)) { ret= SP_INTERNAL_ERROR; goto end; } if (!*sphp) { ret= SP_PARSE_ERROR; goto end; } (*sphp)->set_definer(definer_user_name, definer_host_name); (*sphp)->set_info(created, modified, &chistics, sql_mode); (*sphp)->set_creation_ctx(creation_ctx); (*sphp)->optimize(); /* Not strictly necessary to invoke this method here, since we know that we've parsed CREATE PROCEDURE/FUNCTION and not an UPDATE/DELETE/INSERT/REPLACE/LOAD/CREATE TABLE, but we try to maintain the invariant that this method is called for each distinct statement, in case its logic is extended with other types of analyses in future. */ newlex.set_trg_event_type_for_tables(); } end: thd->lex->sphead= NULL; lex_end(thd->lex); thd->lex= old_lex; return ret; } static void sp_returns_type(THD *thd, String &result, sp_head *sp) { TABLE table; TABLE_SHARE share; Field *field; bzero((char*) &table, sizeof(table)); bzero((char*) &share, sizeof(share)); table.in_use= thd; table.s = &share; field= sp->create_result_field(0, 0, &table); field->sql_type(result); if (field->has_charset()) { result.append(STRING_WITH_LEN(" CHARSET ")); result.append(field->charset()->csname); if (!(field->charset()->state & MY_CS_PRIMARY)) { result.append(STRING_WITH_LEN(" COLLATE ")); result.append(field->charset()->name); } } delete field; } /** Write stored-routine object into mysql.proc. This operation stores attributes of the stored procedure/function into the mysql.proc. @param thd Thread context. @param type Stored routine type (TYPE_ENUM_PROCEDURE or TYPE_ENUM_FUNCTION). @param sp Stored routine object to store. @note Opens and closes the thread tables. Therefore assumes that there are no locked tables in this thread at the time of invocation. Unlike some other DDL statements, *does* close the tables in the end, since the call to this function is normally followed by an implicit grant (sp_grant_privileges()) and this subsequent call opens and closes mysql.procs_priv. @return Error code. SP_OK is returned on success. Other SP_ constants are used to indicate about errors. */ int sp_create_routine(THD *thd, stored_procedure_type type, sp_head *sp) { int ret; TABLE *table; char definer_buf[USER_HOST_BUFF_SIZE]; LEX_STRING definer; ulonglong saved_mode= thd->variables.sql_mode; MDL_key::enum_mdl_namespace mdl_type= type == TYPE_ENUM_FUNCTION ? MDL_key::FUNCTION : MDL_key::PROCEDURE; CHARSET_INFO *db_cs= get_default_db_collation(thd, sp->m_db.str); enum_check_fields saved_count_cuted_fields; bool store_failed= FALSE; DBUG_ENTER("sp_create_routine"); DBUG_PRINT("enter", ("type: %d name: %.*s", (int) type, (int) sp->m_name.length, sp->m_name.str)); String retstr(64); retstr.set_charset(system_charset_info); DBUG_ASSERT(type == TYPE_ENUM_PROCEDURE || type == TYPE_ENUM_FUNCTION); /* Grab an exclusive MDL lock. */ if (lock_object_name(thd, mdl_type, sp->m_db.str, sp->m_name.str)) DBUG_RETURN(SP_OPEN_TABLE_FAILED); /* Reset sql_mode during data dictionary operations. */ thd->variables.sql_mode= 0; saved_count_cuted_fields= thd->count_cuted_fields; thd->count_cuted_fields= CHECK_FIELD_WARN; if (!(table= open_proc_table_for_update(thd))) ret= SP_OPEN_TABLE_FAILED; else { restore_record(table, s->default_values); // Get default values for fields /* NOTE: all needed privilege checks have been already done. */ thd->lex->definer->set_lex_string(&definer, definer_buf); if (table->s->fields < MYSQL_PROC_FIELD_COUNT) { ret= SP_GET_FIELD_FAILED; goto done; } if (system_charset_info->cset->numchars(system_charset_info, sp->m_name.str, sp->m_name.str+sp->m_name.length) > table->field[MYSQL_PROC_FIELD_NAME]->char_length()) { ret= SP_BAD_IDENTIFIER; goto done; } if (sp->m_body.length > table->field[MYSQL_PROC_FIELD_BODY]->field_length) { ret= SP_BODY_TOO_LONG; goto done; } store_failed= table->field[MYSQL_PROC_FIELD_DB]-> store(sp->m_db.str, sp->m_db.length, system_charset_info); store_failed= store_failed || table->field[MYSQL_PROC_FIELD_NAME]-> store(sp->m_name.str, sp->m_name.length, system_charset_info); store_failed= store_failed || table->field[MYSQL_PROC_MYSQL_TYPE]-> store((longlong)type, TRUE); store_failed= store_failed || table->field[MYSQL_PROC_FIELD_SPECIFIC_NAME]-> store(sp->m_name.str, sp->m_name.length, system_charset_info); if (sp->m_chistics->daccess != SP_DEFAULT_ACCESS) { store_failed= store_failed || table->field[MYSQL_PROC_FIELD_ACCESS]-> store((longlong)sp->m_chistics->daccess, TRUE); } store_failed= store_failed || table->field[MYSQL_PROC_FIELD_DETERMINISTIC]-> store((longlong)(sp->m_chistics->detistic ? 1 : 2), TRUE); if (sp->m_chistics->suid != SP_IS_DEFAULT_SUID) { store_failed= store_failed || table->field[MYSQL_PROC_FIELD_SECURITY_TYPE]-> store((longlong)sp->m_chistics->suid, TRUE); } store_failed= store_failed || table->field[MYSQL_PROC_FIELD_PARAM_LIST]-> store(sp->m_params.str, sp->m_params.length, system_charset_info); if (sp->m_type == TYPE_ENUM_FUNCTION) { sp_returns_type(thd, retstr, sp); store_failed= store_failed || table->field[MYSQL_PROC_FIELD_RETURNS]-> store(retstr.ptr(), retstr.length(), system_charset_info); } store_failed= store_failed || table->field[MYSQL_PROC_FIELD_BODY]-> store(sp->m_body.str, sp->m_body.length, system_charset_info); store_failed= store_failed || table->field[MYSQL_PROC_FIELD_DEFINER]-> store(definer.str, definer.length, system_charset_info); ((Field_timestamp *)table->field[MYSQL_PROC_FIELD_CREATED])->set_time(); ((Field_timestamp *)table->field[MYSQL_PROC_FIELD_MODIFIED])->set_time(); store_failed= store_failed || table->field[MYSQL_PROC_FIELD_SQL_MODE]-> store((longlong)saved_mode, TRUE); if (sp->m_chistics->comment.str) { store_failed= store_failed || table->field[MYSQL_PROC_FIELD_COMMENT]-> store(sp->m_chistics->comment.str, sp->m_chistics->comment.length, system_charset_info); } if ((sp->m_type == TYPE_ENUM_FUNCTION) && !trust_function_creators && mysql_bin_log.is_open()) { if (!sp->m_chistics->detistic) { /* Note that this test is not perfect; one could use a non-deterministic read-only function in an update statement. */ enum enum_sp_data_access access= (sp->m_chistics->daccess == SP_DEFAULT_ACCESS) ? SP_DEFAULT_ACCESS_MAPPING : sp->m_chistics->daccess; if (access == SP_CONTAINS_SQL || access == SP_MODIFIES_SQL_DATA) { my_message(ER_BINLOG_UNSAFE_ROUTINE, ER(ER_BINLOG_UNSAFE_ROUTINE), MYF(0)); ret= SP_INTERNAL_ERROR; goto done; } } if (!(thd->security_ctx->master_access & SUPER_ACL)) { my_message(ER_BINLOG_CREATE_ROUTINE_NEED_SUPER, ER(ER_BINLOG_CREATE_ROUTINE_NEED_SUPER), MYF(0)); ret= SP_INTERNAL_ERROR; goto done; } } table->field[MYSQL_PROC_FIELD_CHARACTER_SET_CLIENT]->set_notnull(); store_failed= store_failed || table->field[MYSQL_PROC_FIELD_CHARACTER_SET_CLIENT]->store( thd->charset()->csname, strlen(thd->charset()->csname), system_charset_info); table->field[MYSQL_PROC_FIELD_COLLATION_CONNECTION]->set_notnull(); store_failed= store_failed || table->field[MYSQL_PROC_FIELD_COLLATION_CONNECTION]->store( thd->variables.collation_connection->name, strlen(thd->variables.collation_connection->name), system_charset_info); table->field[MYSQL_PROC_FIELD_DB_COLLATION]->set_notnull(); store_failed= store_failed || table->field[MYSQL_PROC_FIELD_DB_COLLATION]->store( db_cs->name, strlen(db_cs->name), system_charset_info); table->field[MYSQL_PROC_FIELD_BODY_UTF8]->set_notnull(); store_failed= store_failed || table->field[MYSQL_PROC_FIELD_BODY_UTF8]->store( sp->m_body_utf8.str, sp->m_body_utf8.length, system_charset_info); if (store_failed) { ret= SP_FLD_STORE_FAILED; goto done; } ret= SP_OK; if (table->file->ha_write_row(table->record[0])) ret= SP_WRITE_ROW_FAILED; /* Make change permanent and avoid 'table is marked as crashed' errors */ table->file->extra(HA_EXTRA_FLUSH); if (ret == SP_OK) sp_cache_invalidate(); if (ret == SP_OK && mysql_bin_log.is_open()) { thd->clear_error(); String log_query; log_query.set_charset(system_charset_info); if (!create_string(thd, &log_query, sp->m_type, (sp->m_explicit_name ? sp->m_db.str : NULL), (sp->m_explicit_name ? sp->m_db.length : 0), sp->m_name.str, sp->m_name.length, sp->m_params.str, sp->m_params.length, retstr.ptr(), retstr.length(), sp->m_body.str, sp->m_body.length, sp->m_chistics, &(thd->lex->definer->user), &(thd->lex->definer->host), saved_mode)) { ret= SP_INTERNAL_ERROR; goto done; } /* restore sql_mode when binloging */ thd->variables.sql_mode= saved_mode; /* Such a statement can always go directly to binlog, no trans cache */ if (thd->binlog_query(THD::STMT_QUERY_TYPE, log_query.ptr(), log_query.length(), FALSE, FALSE, FALSE, 0)) ret= SP_INTERNAL_ERROR; thd->variables.sql_mode= 0; } } done: thd->count_cuted_fields= saved_count_cuted_fields; thd->variables.sql_mode= saved_mode; DBUG_ASSERT(!thd->is_current_stmt_binlog_format_row()); DBUG_RETURN(ret); } /** Delete the record for the stored routine object from mysql.proc. The operation deletes the record for the stored routine specified by name from the mysql.proc table and invalidates the stored-routine cache. @param thd Thread context. @param type Stored routine type (TYPE_ENUM_PROCEDURE or TYPE_ENUM_FUNCTION) @param name Stored routine name. @return Error code. SP_OK is returned on success. Other SP_ constants are used to indicate about errors. */ int sp_drop_routine(THD *thd, stored_procedure_type type, sp_name *name) { TABLE *table; int ret; MDL_key::enum_mdl_namespace mdl_type= type == TYPE_ENUM_FUNCTION ? MDL_key::FUNCTION : MDL_key::PROCEDURE; DBUG_ENTER("sp_drop_routine"); DBUG_PRINT("enter", ("type: %d name: %.*s", type, (int) name->m_name.length, name->m_name.str)); DBUG_ASSERT(type == TYPE_ENUM_PROCEDURE || type == TYPE_ENUM_FUNCTION); /* Grab an exclusive MDL lock. */ if (lock_object_name(thd, mdl_type, name->m_db.str, name->m_name.str)) DBUG_RETURN(SP_DELETE_ROW_FAILED); if (!(table= open_proc_table_for_update(thd))) DBUG_RETURN(SP_OPEN_TABLE_FAILED); /* This statement will be replicated as a statement, even when using row-based replication. The flag will be reset at the end of the statement. */ if ((ret= db_find_routine_aux(thd, type, name, table)) == SP_OK) { if (table->file->ha_delete_row(table->record[0])) ret= SP_DELETE_ROW_FAILED; /* Make change permanent and avoid 'table is marked as crashed' errors */ table->file->extra(HA_EXTRA_FLUSH); } if (ret == SP_OK) { if (write_bin_log(thd, TRUE, thd->query(), thd->query_length())) ret= SP_INTERNAL_ERROR; sp_cache_invalidate(); /* A lame workaround for lack of cache flush: make sure the routine is at least gone from the local cache. */ { sp_head *sp; sp_cache **spc= (type == TYPE_ENUM_FUNCTION ? &thd->sp_func_cache : &thd->sp_proc_cache); sp= sp_cache_lookup(spc, name); if (sp) sp_cache_flush_obsolete(spc, &sp); } } DBUG_ASSERT(!thd->is_current_stmt_binlog_format_row()); DBUG_RETURN(ret); } /** Find and updated the record for the stored routine object in mysql.proc. The operation finds the record for the stored routine specified by name in the mysql.proc table and updates it with new attributes. After successful update, the cache is invalidated. @param thd Thread context. @param type Stored routine type (TYPE_ENUM_PROCEDURE or TYPE_ENUM_FUNCTION) @param name Stored routine name. @param chistics New values of stored routine attributes to write. @return Error code. SP_OK is returned on success. Other SP_ constants are used to indicate about errors. */ int sp_update_routine(THD *thd, stored_procedure_type type, sp_name *name, st_sp_chistics *chistics) { TABLE *table; int ret; MDL_key::enum_mdl_namespace mdl_type= type == TYPE_ENUM_FUNCTION ? MDL_key::FUNCTION : MDL_key::PROCEDURE; DBUG_ENTER("sp_update_routine"); DBUG_PRINT("enter", ("type: %d name: %.*s", (int) type, (int) name->m_name.length, name->m_name.str)); DBUG_ASSERT(type == TYPE_ENUM_PROCEDURE || type == TYPE_ENUM_FUNCTION); /* Grab an exclusive MDL lock. */ if (lock_object_name(thd, mdl_type, name->m_db.str, name->m_name.str)) DBUG_RETURN(SP_OPEN_TABLE_FAILED); if (!(table= open_proc_table_for_update(thd))) DBUG_RETURN(SP_OPEN_TABLE_FAILED); if ((ret= db_find_routine_aux(thd, type, name, table)) == SP_OK) { if (type == TYPE_ENUM_FUNCTION && ! trust_function_creators && mysql_bin_log.is_open() && (chistics->daccess == SP_CONTAINS_SQL || chistics->daccess == SP_MODIFIES_SQL_DATA)) { char *ptr; bool is_deterministic; ptr= get_field(thd->mem_root, table->field[MYSQL_PROC_FIELD_DETERMINISTIC]); if (ptr == NULL) { ret= SP_INTERNAL_ERROR; goto err; } is_deterministic= ptr[0] == 'N' ? FALSE : TRUE; if (!is_deterministic) { my_message(ER_BINLOG_UNSAFE_ROUTINE, ER(ER_BINLOG_UNSAFE_ROUTINE), MYF(0)); ret= SP_INTERNAL_ERROR; goto err; } } store_record(table,record[1]); ((Field_timestamp *)table->field[MYSQL_PROC_FIELD_MODIFIED])->set_time(); if (chistics->suid != SP_IS_DEFAULT_SUID) table->field[MYSQL_PROC_FIELD_SECURITY_TYPE]-> store((longlong)chistics->suid, TRUE); if (chistics->daccess != SP_DEFAULT_ACCESS) table->field[MYSQL_PROC_FIELD_ACCESS]-> store((longlong)chistics->daccess, TRUE); if (chistics->comment.str) table->field[MYSQL_PROC_FIELD_COMMENT]->store(chistics->comment.str, chistics->comment.length, system_charset_info); if ((ret= table->file->ha_update_row(table->record[1],table->record[0])) && ret != HA_ERR_RECORD_IS_THE_SAME) ret= SP_WRITE_ROW_FAILED; else ret= 0; /* Make change permanent and avoid 'table is marked as crashed' errors */ table->file->extra(HA_EXTRA_FLUSH); } if (ret == SP_OK) { if (write_bin_log(thd, TRUE, thd->query(), thd->query_length())) ret= SP_INTERNAL_ERROR; sp_cache_invalidate(); } err: DBUG_ASSERT(!thd->is_current_stmt_binlog_format_row()); DBUG_RETURN(ret); } /** This internal handler is used to trap errors from opening mysql.proc. */ class Lock_db_routines_error_handler : public Internal_error_handler { public: bool handle_condition(THD *thd, uint sql_errno, const char* sqlstate, Sql_condition::enum_warning_level level, const char* msg, Sql_condition ** cond_hdl) { if (sql_errno == ER_NO_SUCH_TABLE || sql_errno == ER_NO_SUCH_TABLE_IN_ENGINE || sql_errno == ER_CANNOT_LOAD_FROM_TABLE_V2 || sql_errno == ER_COL_COUNT_DOESNT_MATCH_PLEASE_UPDATE || sql_errno == ER_COL_COUNT_DOESNT_MATCH_CORRUPTED_V2) return true; return false; } }; /** Acquires exclusive metadata lock on all stored routines in the given database. @note Will also return false (=success) if mysql.proc can't be opened or is outdated. This allows DROP DATABASE to continue in these cases. */ bool lock_db_routines(THD *thd, char *db) { TABLE *table; uint key_len; Open_tables_backup open_tables_state_backup; MDL_request_list mdl_requests; Lock_db_routines_error_handler err_handler; uchar keybuf[MAX_KEY_LENGTH]; DBUG_ENTER("lock_db_routines"); DBUG_ASSERT(ok_for_lower_case_names(db)); /* mysql.proc will be re-opened during deletion, so we can ignore errors when opening the table here. The error handler is used to avoid getting the same warning twice. */ thd->push_internal_handler(&err_handler); table= open_proc_table_for_read(thd, &open_tables_state_backup); thd->pop_internal_handler(); if (!table) { /* DROP DATABASE should not fail even if mysql.proc does not exist or is outdated. We therefore only abort mysql_rm_db() if we have errors not handled by the error handler. */ DBUG_RETURN(thd->is_error() || thd->killed); } table->field[MYSQL_PROC_FIELD_DB]->store(db, strlen(db), system_charset_info); key_len= table->key_info->key_part[0].store_length; table->field[MYSQL_PROC_FIELD_DB]->get_key_image(keybuf, key_len, Field::itRAW); int nxtres= table->file->ha_index_init(0, 1); if (nxtres) { table->file->print_error(nxtres, MYF(0)); close_system_tables(thd, &open_tables_state_backup); DBUG_RETURN(true); } if (! table->file->ha_index_read_map(table->record[0], keybuf, (key_part_map)1, HA_READ_KEY_EXACT)) { do { char *sp_name= get_field(thd->mem_root, table->field[MYSQL_PROC_FIELD_NAME]); if (sp_name == NULL) // skip invalid sp names (hand-edited mysql.proc?) continue; longlong sp_type= table->field[MYSQL_PROC_MYSQL_TYPE]->val_int(); MDL_request *mdl_request= new (thd->mem_root) MDL_request; mdl_request->init(sp_type == TYPE_ENUM_FUNCTION ? MDL_key::FUNCTION : MDL_key::PROCEDURE, db, sp_name, MDL_EXCLUSIVE, MDL_TRANSACTION); mdl_requests.push_front(mdl_request); } while (! (nxtres= table->file->ha_index_next_same(table->record[0], keybuf, key_len))); } table->file->ha_index_end(); if (nxtres != 0 && nxtres != HA_ERR_END_OF_FILE) { table->file->print_error(nxtres, MYF(0)); close_system_tables(thd, &open_tables_state_backup); DBUG_RETURN(true); } close_system_tables(thd, &open_tables_state_backup); /* We should already hold a global IX lock and a schema X lock. */ DBUG_ASSERT(thd->mdl_context.is_lock_owner(MDL_key::GLOBAL, "", "", MDL_INTENTION_EXCLUSIVE) && thd->mdl_context.is_lock_owner(MDL_key::SCHEMA, db, "", MDL_EXCLUSIVE)); DBUG_RETURN(thd->mdl_context.acquire_locks(&mdl_requests, thd->variables.lock_wait_timeout)); } /** Drop all routines in database 'db' @note Close the thread tables, the calling code might want to delete from other system tables afterwards. */ int sp_drop_db_routines(THD *thd, char *db) { TABLE *table; int ret; uint key_len; MDL_savepoint mdl_savepoint= thd->mdl_context.mdl_savepoint(); uchar keybuf[MAX_KEY_LENGTH]; DBUG_ENTER("sp_drop_db_routines"); DBUG_PRINT("enter", ("db: %s", db)); ret= SP_OPEN_TABLE_FAILED; if (!(table= open_proc_table_for_update(thd))) goto err; table->field[MYSQL_PROC_FIELD_DB]->store(db, strlen(db), system_charset_info); key_len= table->key_info->key_part[0].store_length; table->field[MYSQL_PROC_FIELD_DB]->get_key_image(keybuf, key_len, Field::itRAW); ret= SP_OK; if (table->file->ha_index_init(0, 1)) { ret= SP_KEY_NOT_FOUND; goto err_idx_init; } if (!table->file->ha_index_read_map(table->record[0], keybuf, (key_part_map)1, HA_READ_KEY_EXACT)) { int nxtres; bool deleted= FALSE; do { if (! table->file->ha_delete_row(table->record[0])) deleted= TRUE; /* We deleted something */ else { ret= SP_DELETE_ROW_FAILED; nxtres= 0; break; } } while (!(nxtres= table->file->ha_index_next_same(table->record[0], keybuf, key_len))); if (nxtres != HA_ERR_END_OF_FILE) ret= SP_KEY_NOT_FOUND; if (deleted) { sp_cache_invalidate(); /* Make change permanent and avoid 'table is marked as crashed' errors */ table->file->extra(HA_EXTRA_FLUSH); } } table->file->ha_index_end(); err_idx_init: close_thread_tables(thd); /* Make sure to only release the MDL lock on mysql.proc, not other metadata locks DROP DATABASE might have acquired. */ thd->mdl_context.rollback_to_savepoint(mdl_savepoint); err: DBUG_RETURN(ret); } /** Implement SHOW CREATE statement for stored routines. The operation finds the stored routine object specified by name and then calls sp_head::show_create_routine() for the object. @param thd Thread context. @param type Stored routine type (TYPE_ENUM_PROCEDURE or TYPE_ENUM_FUNCTION) @param name Stored routine name. @return Error status. @retval FALSE on success @retval TRUE on error */ bool sp_show_create_routine(THD *thd, stored_procedure_type type, sp_name *name) { sp_head *sp; DBUG_ENTER("sp_show_create_routine"); DBUG_PRINT("enter", ("name: %.*s", (int) name->m_name.length, name->m_name.str)); DBUG_ASSERT(type == TYPE_ENUM_PROCEDURE || type == TYPE_ENUM_FUNCTION); /* @todo: Consider using prelocking for this code as well. Currently SHOW CREATE PROCEDURE/FUNCTION is a dirty read of the data dictionary, i.e. takes no metadata locks. It is "safe" to do as long as it doesn't affect the results of the binary log or the query cache, which currently it does not. */ if (sp_cache_routine(thd, type, name, FALSE, &sp)) DBUG_RETURN(TRUE); if (sp == NULL || sp->show_create_routine(thd, type)) { /* If we have insufficient privileges, pretend the routine does not exist. */ my_error(ER_SP_DOES_NOT_EXIST, MYF(0), type == TYPE_ENUM_FUNCTION ? "FUNCTION" : "PROCEDURE", name->m_name.str); DBUG_RETURN(TRUE); } DBUG_RETURN(FALSE); } /** Obtain object representing stored procedure/function by its name from stored procedures cache and looking into mysql.proc if needed. @param thd thread context @param type type of object (TYPE_ENUM_FUNCTION or TYPE_ENUM_PROCEDURE) @param name name of procedure @param cp hash to look routine in @param cache_only if true perform cache-only lookup (Don't look in mysql.proc). @retval NonNULL pointer to sp_head object for the procedure @retval NULL in case of error. */ sp_head * sp_find_routine(THD *thd, stored_procedure_type type, sp_name *name, sp_cache **cp, bool cache_only) { sp_head *sp; ulong depth= (type == TYPE_ENUM_PROCEDURE ? thd->variables.max_sp_recursion_depth : 0); DBUG_ENTER("sp_find_routine"); DBUG_PRINT("enter", ("name: %.*s.%.*s type: %d cache only %d", (int) name->m_db.length, name->m_db.str, (int) name->m_name.length, name->m_name.str, type, cache_only)); if ((sp= sp_cache_lookup(cp, name))) { ulong level; sp_head *new_sp; const char *returns= ""; /* String buffer for RETURNS data type must have system charset; 64 -- size of "returns" column of mysql.proc. */ String retstr(64); retstr.set_charset(sp->get_creation_ctx()->get_client_cs()); DBUG_PRINT("info", ("found: 0x%lx", (ulong)sp)); if (sp->m_first_free_instance) { DBUG_PRINT("info", ("first free: 0x%lx level: %lu flags %x", (ulong)sp->m_first_free_instance, sp->m_first_free_instance->m_recursion_level, sp->m_first_free_instance->m_flags)); DBUG_ASSERT(!(sp->m_first_free_instance->m_flags & sp_head::IS_INVOKED)); if (sp->m_first_free_instance->m_recursion_level > depth) { sp->recursion_level_error(thd); DBUG_RETURN(0); } DBUG_RETURN(sp->m_first_free_instance); } /* Actually depth could be +1 than the actual value in case a SP calls SHOW CREATE PROCEDURE. Hence, the linked list could hold up to one more instance. */ level= sp->m_last_cached_sp->m_recursion_level + 1; if (level > depth) { sp->recursion_level_error(thd); DBUG_RETURN(0); } if (type == TYPE_ENUM_FUNCTION) { sp_returns_type(thd, retstr, sp); returns= retstr.ptr(); } if (db_load_routine(thd, type, name, &new_sp, sp->m_sql_mode, sp->m_params.str, returns, sp->m_body.str, *sp->m_chistics, &sp->m_definer_user, &sp->m_definer_host, sp->m_created, sp->m_modified, sp->get_creation_ctx()) == SP_OK) { sp->m_last_cached_sp->m_next_cached_sp= new_sp; new_sp->m_recursion_level= level; new_sp->m_first_instance= sp; sp->m_last_cached_sp= sp->m_first_free_instance= new_sp; DBUG_PRINT("info", ("added level: 0x%lx, level: %lu, flags %x", (ulong)new_sp, new_sp->m_recursion_level, new_sp->m_flags)); DBUG_RETURN(new_sp); } DBUG_RETURN(0); } if (!cache_only) { if (db_find_routine(thd, type, name, &sp) == SP_OK) { sp_cache_insert(cp, sp); DBUG_PRINT("info", ("added new: 0x%lx, level: %lu, flags %x", (ulong)sp, sp->m_recursion_level, sp->m_flags)); } } DBUG_RETURN(sp); } /** This is used by sql_acl.cc:mysql_routine_grant() and is used to find the routines in 'routines'. @param thd Thread handler @param routines List of needles in the hay stack @param is_proc Indicates whether routines in the list are procedures or functions. @return @retval FALSE Found. @retval TRUE Not found */ bool sp_exist_routines(THD *thd, TABLE_LIST *routines, bool is_proc) { TABLE_LIST *routine; bool sp_object_found; DBUG_ENTER("sp_exists_routine"); for (routine= routines; routine; routine= routine->next_global) { sp_name *name; LEX_STRING lex_db; LEX_STRING lex_name; lex_db.length= strlen(routine->db); lex_name.length= strlen(routine->table_name); lex_db.str= thd->strmake(routine->db, lex_db.length); lex_name.str= thd->strmake(routine->table_name, lex_name.length); name= new sp_name(lex_db, lex_name, true); name->init_qname(thd); sp_object_found= is_proc ? sp_find_routine(thd, TYPE_ENUM_PROCEDURE, name, &thd->sp_proc_cache, FALSE) != NULL : sp_find_routine(thd, TYPE_ENUM_FUNCTION, name, &thd->sp_func_cache, FALSE) != NULL; thd->get_stmt_da()->clear_warning_info(thd->query_id); if (! sp_object_found) { my_error(ER_SP_DOES_NOT_EXIST, MYF(0), "FUNCTION or PROCEDURE", routine->table_name); DBUG_RETURN(TRUE); } } DBUG_RETURN(FALSE); } extern "C" uchar* sp_sroutine_key(const uchar *ptr, size_t *plen, my_bool first) { Sroutine_hash_entry *rn= (Sroutine_hash_entry *)ptr; *plen= rn->mdl_request.key.length(); return (uchar *)rn->mdl_request.key.ptr(); } /** Auxilary function that adds new element to the set of stored routines used by statement. In case when statement uses stored routines but does not need prelocking (i.e. it does not use any tables) we will access the elements of Query_tables_list::sroutines set on prepared statement re-execution. Because of this we have to allocate memory for both hash element and copy of its key in persistent arena. @param prelocking_ctx Prelocking context of the statement @param arena Arena in which memory for new element will be allocated @param key Key for the hash representing set @param belong_to_view Uppermost view which uses this routine (0 if routine is not used by view) @note Will also add element to end of 'Query_tables_list::sroutines_list' list. @todo When we will got rid of these accesses on re-executions we will be able to allocate memory for hash elements in non-persitent arena and directly use key values from sp_head::m_sroutines sets instead of making their copies. @retval TRUE new element was added. @retval FALSE element was not added (because it is already present in the set). */ bool sp_add_used_routine(Query_tables_list *prelocking_ctx, Query_arena *arena, const MDL_key *key, TABLE_LIST *belong_to_view) { my_hash_init_opt(&prelocking_ctx->sroutines, system_charset_info, Query_tables_list::START_SROUTINES_HASH_SIZE, 0, 0, sp_sroutine_key, 0, 0); if (!my_hash_search(&prelocking_ctx->sroutines, key->ptr(), key->length())) { Sroutine_hash_entry *rn= (Sroutine_hash_entry *)arena->alloc(sizeof(Sroutine_hash_entry)); if (!rn) // OOM. Error will be reported using fatal_error(). return FALSE; rn->mdl_request.init(key, MDL_SHARED, MDL_TRANSACTION); if (my_hash_insert(&prelocking_ctx->sroutines, (uchar *)rn)) return FALSE; prelocking_ctx->sroutines_list.link_in_list(rn, &rn->next); rn->belong_to_view= belong_to_view; rn->m_sp_cache_version= 0; return TRUE; } return FALSE; } /** Add routine which is explicitly used by statement to the set of stored routines used by this statement. To be friendly towards prepared statements one should pass persistent arena as second argument. @param prelocking_ctx Prelocking context of the statement @param arena Arena in which memory for new element of the set will be allocated @param rt Routine name @param rt_type Routine type (one of TYPE_ENUM_PROCEDURE/...) @note Will also add element to end of 'Query_tables_list::sroutines_list' list (and will take into account that this is an explicitly used routine). */ void sp_add_used_routine(Query_tables_list *prelocking_ctx, Query_arena *arena, sp_name *rt, enum stored_procedure_type rt_type) { MDL_key key((rt_type == TYPE_ENUM_FUNCTION) ? MDL_key::FUNCTION : MDL_key::PROCEDURE, rt->m_db.str, rt->m_name.str); (void)sp_add_used_routine(prelocking_ctx, arena, &key, 0); prelocking_ctx->sroutines_list_own_last= prelocking_ctx->sroutines_list.next; prelocking_ctx->sroutines_list_own_elements= prelocking_ctx->sroutines_list.elements; } /** Remove routines which are only indirectly used by statement from the set of routines used by this statement. @param prelocking_ctx Prelocking context of the statement */ void sp_remove_not_own_routines(Query_tables_list *prelocking_ctx) { Sroutine_hash_entry *not_own_rt, *next_rt; for (not_own_rt= *prelocking_ctx->sroutines_list_own_last; not_own_rt; not_own_rt= next_rt) { /* It is safe to obtain not_own_rt->next after calling hash_delete() now but we want to be more future-proof. */ next_rt= not_own_rt->next; my_hash_delete(&prelocking_ctx->sroutines, (uchar *)not_own_rt); } *prelocking_ctx->sroutines_list_own_last= NULL; prelocking_ctx->sroutines_list.next= prelocking_ctx->sroutines_list_own_last; prelocking_ctx->sroutines_list.elements= prelocking_ctx->sroutines_list_own_elements; } /** Merge contents of two hashes representing sets of routines used by statements or by other routines. @param dst hash to which elements should be added @param src hash from which elements merged @note This procedure won't create new Sroutine_hash_entry objects, instead it will simply add elements from source to destination hash. Thus time of life of elements in destination hash becomes dependant on time of life of elements from source hash. It also won't touch lists linking elements in source and destination hashes. @returns @return TRUE Failure @return FALSE Success */ bool sp_update_sp_used_routines(HASH *dst, HASH *src) { for (uint i=0 ; i < src->records ; i++) { Sroutine_hash_entry *rt= (Sroutine_hash_entry *)my_hash_element(src, i); if (!my_hash_search(dst, (uchar *)rt->mdl_request.key.ptr(), rt->mdl_request.key.length())) { if (my_hash_insert(dst, (uchar *)rt)) return TRUE; } } return FALSE; } /** Add contents of hash representing set of routines to the set of routines used by statement. @param thd Thread context @param prelocking_ctx Prelocking context of the statement @param src Hash representing set from which routines will be added @param belong_to_view Uppermost view which uses these routines, 0 if none @note It will also add elements to end of 'Query_tables_list::sroutines_list' list. */ void sp_update_stmt_used_routines(THD *thd, Query_tables_list *prelocking_ctx, HASH *src, TABLE_LIST *belong_to_view) { for (uint i=0 ; i < src->records ; i++) { Sroutine_hash_entry *rt= (Sroutine_hash_entry *)my_hash_element(src, i); (void)sp_add_used_routine(prelocking_ctx, thd->stmt_arena, &rt->mdl_request.key, belong_to_view); } } /** Add contents of list representing set of routines to the set of routines used by statement. @param thd Thread context @param prelocking_ctx Prelocking context of the statement @param src List representing set from which routines will be added @param belong_to_view Uppermost view which uses these routines, 0 if none @note It will also add elements to end of 'Query_tables_list::sroutines_list' list. */ void sp_update_stmt_used_routines(THD *thd, Query_tables_list *prelocking_ctx, SQL_I_List *src, TABLE_LIST *belong_to_view) { for (Sroutine_hash_entry *rt= src->first; rt; rt= rt->next) (void)sp_add_used_routine(prelocking_ctx, thd->stmt_arena, &rt->mdl_request.key, belong_to_view); } /** A helper wrapper around sp_cache_routine() to use from prelocking until 'sp_name' is eradicated as a class. */ int sp_cache_routine(THD *thd, Sroutine_hash_entry *rt, bool lookup_only, sp_head **sp) { char qname_buff[NAME_LEN*2+1+1]; sp_name name(&rt->mdl_request.key, qname_buff); MDL_key::enum_mdl_namespace mdl_type= rt->mdl_request.key.mdl_namespace(); stored_procedure_type type= ((mdl_type == MDL_key::FUNCTION) ? TYPE_ENUM_FUNCTION : TYPE_ENUM_PROCEDURE); /* Check that we have an MDL lock on this routine, unless it's a top-level CALL. The assert below should be unambiguous: the first element in sroutines_list has an MDL lock unless it's a top-level call, or a trigger, but triggers can't occur here (see the preceding assert). */ DBUG_ASSERT(rt->mdl_request.ticket || rt == thd->lex->sroutines_list.first); return sp_cache_routine(thd, type, &name, lookup_only, sp); } /** Ensure that routine is present in cache by loading it from the mysql.proc table if needed. If the routine is present but old, reload it. Emit an appropriate error if there was a problem during loading. @param[in] thd Thread context. @param[in] type Type of object (TYPE_ENUM_FUNCTION or TYPE_ENUM_PROCEDURE). @param[in] name Name of routine. @param[in] lookup_only Only check that the routine is in the cache. If it's not, don't try to load. If it is present, but old, don't try to reload. @param[out] sp Pointer to sp_head object for routine, NULL if routine was not found. @retval 0 Either routine is found and was succesfully loaded into cache or it does not exist. @retval non-0 Error while loading routine from mysql,proc table. */ int sp_cache_routine(THD *thd, enum stored_procedure_type type, sp_name *name, bool lookup_only, sp_head **sp) { int ret= 0; sp_cache **spc= (type == TYPE_ENUM_FUNCTION ? &thd->sp_func_cache : &thd->sp_proc_cache); DBUG_ENTER("sp_cache_routine"); DBUG_ASSERT(type == TYPE_ENUM_FUNCTION || type == TYPE_ENUM_PROCEDURE); *sp= sp_cache_lookup(spc, name); if (lookup_only) DBUG_RETURN(SP_OK); if (*sp) { sp_cache_flush_obsolete(spc, sp); if (*sp) DBUG_RETURN(SP_OK); } switch ((ret= db_find_routine(thd, type, name, sp))) { case SP_OK: sp_cache_insert(spc, *sp); break; case SP_KEY_NOT_FOUND: ret= SP_OK; break; default: /* Query might have been killed, don't set error. */ if (thd->killed) break; /* Any error when loading an existing routine is either some problem with the mysql.proc table, or a parse error because the contents has been tampered with (in which case we clear that error). */ if (ret == SP_PARSE_ERROR) thd->clear_error(); /* If we cleared the parse error, or when db_find_routine() flagged an error with it's return value without calling my_error(), we set the generic "mysql.proc table corrupt" error here. */ if (! thd->is_error()) { /* SP allows full NAME_LEN chars thus he have to allocate enough size in bytes. Otherwise there is stack overrun could happen if multibyte sequence is `name`. `db` is still safe because the rest of the server checks agains NAME_LEN bytes and not chars. Hence, the overrun happens only if the name is in length > 32 and uses multibyte (cyrillic, greek, etc.) */ char n[NAME_LEN*2+2]; /* m_qname.str is not always \0 terminated */ memcpy(n, name->m_qname.str, name->m_qname.length); n[name->m_qname.length]= '\0'; my_error(ER_SP_PROC_TABLE_CORRUPT, MYF(0), n, ret); } break; } DBUG_RETURN(ret); } /** Generates the CREATE... string from the table information. @return Returns TRUE on success, FALSE on (alloc) failure. */ static bool create_string(THD *thd, String *buf, stored_procedure_type type, const char *db, ulong dblen, const char *name, ulong namelen, const char *params, ulong paramslen, const char *returns, ulong returnslen, const char *body, ulong bodylen, st_sp_chistics *chistics, const LEX_STRING *definer_user, const LEX_STRING *definer_host, ulonglong sql_mode) { ulonglong old_sql_mode= thd->variables.sql_mode; /* Make some room to begin with */ if (buf->alloc(100 + dblen + 1 + namelen + paramslen + returnslen + bodylen + chistics->comment.length + 10 /* length of " DEFINER= "*/ + USER_HOST_BUFF_SIZE)) return FALSE; thd->variables.sql_mode= sql_mode; buf->append(STRING_WITH_LEN("CREATE ")); append_definer(thd, buf, definer_user, definer_host); if (type == TYPE_ENUM_FUNCTION) buf->append(STRING_WITH_LEN("FUNCTION ")); else buf->append(STRING_WITH_LEN("PROCEDURE ")); if (dblen > 0) { append_identifier(thd, buf, db, dblen); buf->append('.'); } append_identifier(thd, buf, name, namelen); buf->append('('); buf->append(params, paramslen); buf->append(')'); if (type == TYPE_ENUM_FUNCTION) { buf->append(STRING_WITH_LEN(" RETURNS ")); buf->append(returns, returnslen); } buf->append('\n'); switch (chistics->daccess) { case SP_NO_SQL: buf->append(STRING_WITH_LEN(" NO SQL\n")); break; case SP_READS_SQL_DATA: buf->append(STRING_WITH_LEN(" READS SQL DATA\n")); break; case SP_MODIFIES_SQL_DATA: buf->append(STRING_WITH_LEN(" MODIFIES SQL DATA\n")); break; case SP_DEFAULT_ACCESS: case SP_CONTAINS_SQL: /* Do nothing */ break; } if (chistics->detistic) buf->append(STRING_WITH_LEN(" DETERMINISTIC\n")); if (chistics->suid == SP_IS_NOT_SUID) buf->append(STRING_WITH_LEN(" SQL SECURITY INVOKER\n")); if (chistics->comment.length) { buf->append(STRING_WITH_LEN(" COMMENT ")); append_unescaped(buf, chistics->comment.str, chistics->comment.length); buf->append('\n'); } buf->append(body, bodylen); thd->variables.sql_mode= old_sql_mode; return TRUE; } /** @brief The function loads sp_head struct for information schema purposes (used for I_S ROUTINES & PARAMETERS tables). @param[in] thd thread handler @param[in] proc_table mysql.proc table structurte @param[in] db database name @param[in] name sp name @param[in] sql_mode SQL mode @param[in] type Routine type @param[in] returns 'returns' string @param[in] params parameters definition string @param[out] free_sp_head returns 1 if we need to free sp_head struct otherwise returns 0 @return Pointer on sp_head struct @retval # Pointer on sp_head struct @retval 0 error */ sp_head * sp_load_for_information_schema(THD *thd, TABLE *proc_table, String *db, String *name, ulong sql_mode, stored_procedure_type type, const char *returns, const char *params, bool *free_sp_head) { const char *sp_body; String defstr; struct st_sp_chistics sp_chistics; const LEX_STRING definer_user= {(char*)STRING_WITH_LEN("")}; const LEX_STRING definer_host= {(char*)STRING_WITH_LEN("")}; LEX_STRING sp_db_str; LEX_STRING sp_name_str; sp_head *sp; sp_cache **spc= ((type == TYPE_ENUM_PROCEDURE) ? &thd->sp_proc_cache : &thd->sp_func_cache); sp_db_str.str= db->c_ptr(); sp_db_str.length= db->length(); sp_name_str.str= name->c_ptr(); sp_name_str.length= name->length(); sp_name sp_name_obj(sp_db_str, sp_name_str, true); sp_name_obj.init_qname(thd); *free_sp_head= 0; if ((sp= sp_cache_lookup(spc, &sp_name_obj))) { return sp; } LEX *old_lex= thd->lex, newlex; Stored_program_creation_ctx *creation_ctx= Stored_routine_creation_ctx::load_from_db(thd, &sp_name_obj, proc_table); sp_body= (type == TYPE_ENUM_FUNCTION ? "RETURN NULL" : "BEGIN END"); bzero((char*) &sp_chistics, sizeof(sp_chistics)); defstr.set_charset(creation_ctx->get_client_cs()); if (!create_string(thd, &defstr, type, sp_db_str.str, sp_db_str.length, sp_name_obj.m_name.str, sp_name_obj.m_name.length, params, strlen(params), returns, strlen(returns), sp_body, strlen(sp_body), &sp_chistics, &definer_user, &definer_host, sql_mode)) return 0; thd->lex= &newlex; newlex.current_select= NULL; sp= sp_compile(thd, &defstr, sql_mode, creation_ctx); *free_sp_head= 1; thd->lex->sphead= NULL; lex_end(thd->lex); thd->lex= old_lex; return sp; }