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316 lines
11 KiB
316 lines
11 KiB
5 months ago
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/* Copyright (c) 2006, 2018, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef SQL_INSERT_INCLUDED
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#define SQL_INSERT_INCLUDED
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#include <stddef.h>
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#include <sys/types.h>
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#include "my_dbug.h"
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#include "my_inttypes.h"
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#include "my_sqlcommand.h"
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#include "sql/query_result.h" // Query_result_interceptor
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#include "sql/sql_cmd_dml.h" // Sql_cmd_dml
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#include "sql/sql_data_change.h" // enum_duplicates
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#include "sql/sql_list.h"
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#include "sql/table.h"
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class Alter_info;
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class Field;
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class Item;
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class SELECT_LEX_UNIT;
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class THD;
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struct HA_CREATE_INFO;
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struct handlerton;
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typedef List<Item> List_item;
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struct MYSQL_LOCK;
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bool check_that_all_fields_are_given_values(THD *thd, TABLE *entry,
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TABLE_LIST *table_list);
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void prepare_triggers_for_insert_stmt(THD *thd, TABLE *table);
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bool write_record(THD *thd, TABLE *table, COPY_INFO *info, COPY_INFO *update);
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bool validate_default_values_of_unset_fields(THD *thd, TABLE *table);
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class Query_result_insert : public Query_result_interceptor {
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public:
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/// The table used for insertion of rows
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TABLE_LIST *table_list;
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TABLE *table;
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private:
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/**
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The columns of the table to be inserted into, *or* the columns of the
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table from which values are selected. For legacy reasons both are
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allowed.
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*/
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List<Item> *fields;
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protected:
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/// ha_start_bulk_insert has been called. Never cleared.
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bool bulk_insert_started;
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public:
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ulonglong autoinc_value_of_last_inserted_row; // autogenerated or not
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COPY_INFO info;
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COPY_INFO update; ///< the UPDATE part of "info"
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bool insert_into_view;
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/**
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Creates a Query_result_insert for routing a result set to an existing
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table.
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@param table_list_par The table reference for the destination table.
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@param table_par The destination table. May be NULL.
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@param target_columns See details.
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@param target_or_source_columns See details.
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@param update_fields The columns to be updated in case of duplicate
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keys. May be NULL.
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@param update_values The values to be assigned in case of duplicate
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keys. May be NULL.
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@param duplic The policy for handling duplicates.
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@todo This constructor takes 8 arguments, 6 of which are used to
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immediately construct a COPY_INFO object. Obviously the constructor
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should take the COPY_INFO object as argument instead. Also, some
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Query_result_insert members initialized here are totally redundant, as they
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are found inside the COPY_INFO.
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The target_columns and target_or_source_columns arguments are set by
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callers as follows:
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@li if CREATE SELECT:
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- target_columns == NULL,
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- target_or_source_columns == expressions listed after SELECT, as in
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CREATE ... SELECT expressions
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@li if INSERT SELECT:
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target_columns
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== target_or_source_columns
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== columns listed between INSERT and SELECT, as in
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INSERT INTO t (columns) SELECT ...
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We set the manage_defaults argument of info's constructor as follows
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([...] denotes something optional):
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@li If target_columns==NULL, the statement is
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@verbatim
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CREATE TABLE a_table [(columns1)] SELECT expressions2
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@endverbatim
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so 'info' must manage defaults of columns1.
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@li Otherwise it is:
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@verbatim
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INSERT INTO a_table [(columns1)] SELECT ...
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@endverbatim
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target_columns is columns1, if not empty then 'info' must manage defaults
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of other columns than columns1.
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*/
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Query_result_insert(TABLE_LIST *table_list_par, TABLE *table_par,
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List<Item> *target_columns,
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List<Item> *target_or_source_columns,
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List<Item> *update_fields, List<Item> *update_values,
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enum_duplicates duplic)
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: Query_result_interceptor(),
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table_list(table_list_par),
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table(table_par),
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fields(target_or_source_columns),
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bulk_insert_started(false),
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autoinc_value_of_last_inserted_row(0),
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info(COPY_INFO::INSERT_OPERATION, target_columns,
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// manage_defaults
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(target_columns == NULL || target_columns->elements != 0), duplic),
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update(COPY_INFO::UPDATE_OPERATION, update_fields, update_values),
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insert_into_view(table_list_par && table_list_par->is_view()) {
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DBUG_ASSERT(target_or_source_columns != NULL);
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DBUG_ASSERT(target_columns == target_or_source_columns ||
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target_columns == NULL);
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}
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public:
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bool need_explain_interceptor() const override { return true; }
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bool prepare(THD *thd, List<Item> &list, SELECT_LEX_UNIT *u) override;
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bool start_execution(THD *thd) override;
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bool send_data(THD *thd, List<Item> &items) override;
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virtual void store_values(THD *thd, List<Item> &values);
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void send_error(THD *thd, uint errcode, const char *err) override;
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bool send_eof(THD *thd) override;
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void abort_result_set(THD *thd) override;
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void cleanup(THD *thd) override;
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private:
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/**
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Indicates whether this statement should be written to binary log's
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transactional cache in statement mode.
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*/
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virtual bool stmt_binlog_is_trans() const;
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};
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/**
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@todo This class inherits a class which is non-abstract. This is not in
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line with good programming practices and the inheritance should be broken
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up.
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*/
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class Query_result_create final : public Query_result_insert {
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TABLE_LIST *create_table;
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HA_CREATE_INFO *create_info;
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TABLE_LIST *select_tables;
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Alter_info *alter_info;
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Field **field;
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/* lock data for tmp table */
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MYSQL_LOCK *m_lock;
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/* m_lock or thd->extra_lock */
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MYSQL_LOCK **m_plock;
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/**
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If table being created has SE supporting atomic DDL, pointer to SE's
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handlerton object to be used for calling SE post-DDL hook, nullptr -
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otherwise.
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*/
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handlerton *m_post_ddl_ht;
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public:
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Query_result_create(TABLE_LIST *table_arg, HA_CREATE_INFO *create_info_par,
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Alter_info *alter_info_arg, List<Item> &select_fields,
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enum_duplicates duplic, TABLE_LIST *select_tables_arg);
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bool prepare(THD *thd, List<Item> &list, SELECT_LEX_UNIT *u) override;
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void store_values(THD *thd, List<Item> &values) override;
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void send_error(THD *thd, uint errcode, const char *err) override;
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bool send_eof(THD *thd) override;
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void abort_result_set(THD *thd) override;
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bool start_execution(THD *thd) override;
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private:
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bool stmt_binlog_is_trans() const override;
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int binlog_show_create_table(THD *thd);
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void drop_open_table(THD *thd);
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};
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/**
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Base class for all INSERT and REPLACE statements. Abstract class that
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is inherited by Sql_cmd_insert_values and Sql_cmd_insert_select.
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*/
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class Sql_cmd_insert_base : public Sql_cmd_dml {
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protected:
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virtual bool precheck(THD *thd) override;
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virtual bool prepare_inner(THD *thd) override;
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private:
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bool resolve_update_expressions(THD *thd);
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public:
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/*
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field_list was created for view and should be removed before PS/SP
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rexecuton
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*/
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bool empty_field_list_on_rset;
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protected:
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const bool is_replace;
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public:
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/**
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Field list to insert/replace
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One of two things:
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1. For the INSERT/REPLACE ... (col1, ... colN) VALUES ... syntax
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this is a list of col1, ..., colN fields.
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2. For the INSERT/REPLACE ... SET col1=x1, ... colM=xM syntax extension
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this is a list of col1, ... colM fields as well.
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*/
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List<Item> insert_field_list;
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/**
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Row data to insert/replace
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One of two things:
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1. For the INSERT/REPLACE ... VALUES (row1), (row2), ... (rowN) syntax
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the list contains N List_item lists: one List_item per row.
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2. For the INSERT/REPLACE ... SET col1=x1, ... colM=xM syntax extension
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this list contains only 1 List_item of M data values: this way we
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emulate this syntax:
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INSERT/REPLACE ... (col1, ... colM) VALUE (x1, ..., xM);
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*/
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List<List_item> insert_many_values;
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/// Number of values per row in insert_many_values, available after resolving
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uint value_count;
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/// ON DUPLICATE KEY UPDATE field list
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List<Item> update_field_list;
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/// ON DUPLICATE KEY UPDATE data value list
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List<Item> update_value_list;
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const enum_duplicates duplicates;
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explicit Sql_cmd_insert_base(bool is_replace_arg,
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enum_duplicates duplicates_arg)
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: empty_field_list_on_rset(false),
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is_replace(is_replace_arg),
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value_count(0),
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duplicates(duplicates_arg) {}
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virtual void cleanup(THD *) override {
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if (empty_field_list_on_rset) {
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empty_field_list_on_rset = false;
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insert_field_list.empty();
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}
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}
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virtual bool accept(THD *thd, Select_lex_visitor *visitor) override;
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};
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/**
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Class that implements INSERT ... VALUES and REPLACE ... VALUES statements.
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*/
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class Sql_cmd_insert_values : public Sql_cmd_insert_base {
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public:
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explicit Sql_cmd_insert_values(bool is_replace_arg,
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enum_duplicates duplicates_arg)
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: Sql_cmd_insert_base(is_replace_arg, duplicates_arg) {}
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virtual enum_sql_command sql_command_code() const {
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return is_replace ? SQLCOM_REPLACE : SQLCOM_INSERT;
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}
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virtual bool is_single_table_plan() const { return true; }
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protected:
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virtual bool execute_inner(THD *thd);
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};
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/**
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Class that implements INSERT ... SELECT and REPLACE ... SELECT statements.
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*/
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class Sql_cmd_insert_select : public Sql_cmd_insert_base {
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public:
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explicit Sql_cmd_insert_select(bool is_replace_arg,
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enum_duplicates duplicates_arg)
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: Sql_cmd_insert_base(is_replace_arg, duplicates_arg) {}
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virtual enum_sql_command sql_command_code() const {
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return is_replace ? SQLCOM_REPLACE_SELECT : SQLCOM_INSERT_SELECT;
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}
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};
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#endif /* SQL_INSERT_INCLUDED */
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