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3bd23b76c5
For InnoDB tables, parse the CREATE TABLE statement to defer index and constraint creation until after data loading. For other storage engines, the DISABLE/ENABLE KEYS commands achieve similar optimization. This behavior is controlled by a new option, innodb-optimize-keys (default: ON), compatible with mydumper. Additionally, this commit separates the table creation phase from data loading. Running DDL statements (such as DROP IF EXISTS) in a single thread avoids the "table not locked" issue from MDEV-34741. As a bonus, view creation no longer requires a separate step.
89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
/*
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Copyright (c) 2024, MariaDB
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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 as published by
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the Free Software Foundation; version 2 of the License.
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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 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 02110-1335 USA
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*/
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#pragma once
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#include <string>
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#include <vector>
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/* TABLE DDL INFO - representation of parsed CREATE TABLE Statement */
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enum class KeyOrConstraintType
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{
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CONSTRAINT,
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INDEX,
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UNKNOWN
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};
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/**
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* Struct representing a table keyor constraint definition
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*/
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struct KeyDefinition
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{
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/** Full key or constraint definition string,
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e.g UNIQUE KEY `uniq_idx` (`col`) */
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std::string definition;
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/** The name of key or constraint, including escape chars */
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std::string name;
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};
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/**
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Information about keys and constraints, extracted from
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CREATE TABLE statement
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*/
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struct TableDDLInfo
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{
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TableDDLInfo(const std::string &create_table_stmt);
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KeyDefinition primary_key;
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std::vector<KeyDefinition> constraints;
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std::vector<KeyDefinition> secondary_indexes;
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std::string storage_engine;
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std::string table_name;
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/* Innodb is using first UNIQUE key for clustering, if no PK is set*/
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std::string non_pk_clustering_key_name;
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/**
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Generate ALTER TABLE ADD/DROP statements for keys or constraints.
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The goal is to remove indexes/constraints before the data is imported
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and recreate them after import.
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PRIMARY key is not affected by these operations
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*/
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std::string generate_alter_add(const std::vector<KeyDefinition> &defs,
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KeyOrConstraintType type) const;
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std::string generate_alter_drop(const std::vector<KeyDefinition> &defs,
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KeyOrConstraintType type) const;
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std::string drop_constraints_sql() const
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{
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return generate_alter_drop(constraints, KeyOrConstraintType::CONSTRAINT);
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}
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std::string add_constraints_sql() const
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{
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return generate_alter_add(constraints, KeyOrConstraintType::CONSTRAINT);
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}
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std::string drop_secondary_indexes_sql() const
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{
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return generate_alter_drop(secondary_indexes,
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KeyOrConstraintType::INDEX);
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}
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std::string add_secondary_indexes_sql() const
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{
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return generate_alter_add(secondary_indexes,
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KeyOrConstraintType::INDEX);
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}
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};
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std::string extract_first_create_table(const std::string &script);
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