170 lines
7.0 KiB
C++
170 lines
7.0 KiB
C++
/* Copyright (c) 2014, 2019, 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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#include "sql/dd/impl/tables/foreign_keys.h"
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#include <new>
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#include <string>
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#include "sql/dd/impl/raw/object_keys.h" // Parent_id_range_key
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#include "sql/dd/impl/raw/raw_record.h" // dd::Raw_record
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#include "sql/dd/impl/raw/raw_table.h" // dd::Raw_table
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#include "sql/dd/impl/transaction_impl.h" // Transaction_ro
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#include "sql/dd/impl/types/object_table_definition_impl.h"
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#include "sql/mysqld.h"
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#include "sql/stateless_allocator.h"
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namespace dd {
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namespace tables {
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const Foreign_keys &Foreign_keys::instance() {
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static Foreign_keys *s_instance = new Foreign_keys();
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return *s_instance;
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}
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///////////////////////////////////////////////////////////////////////////
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const CHARSET_INFO *Foreign_keys::name_collation() {
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return &my_charset_utf8_general_ci;
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}
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///////////////////////////////////////////////////////////////////////////
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Foreign_keys::Foreign_keys() {
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m_target_def.set_table_name("foreign_keys");
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m_target_def.add_field(FIELD_ID, "FIELD_ID",
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"id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT");
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m_target_def.add_field(FIELD_SCHEMA_ID, "FIELD_SCHEMA_ID",
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"schema_id BIGINT UNSIGNED NOT NULL");
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m_target_def.add_field(FIELD_TABLE_ID, "FIELD_TABLE_ID",
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"table_id BIGINT UNSIGNED NOT NULL");
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m_target_def.add_field(FIELD_NAME, "FIELD_NAME",
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"name VARCHAR(64) NOT NULL COLLATE " +
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String_type(name_collation()->name));
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m_target_def.add_field(
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FIELD_UNIQUE_CONSTRAINT_NAME, "FIELD_UNIQUE_CONSTRAINT_NAME",
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"unique_constraint_name VARCHAR(64) COLLATE utf8_tolower_ci");
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m_target_def.add_field(FIELD_MATCH_OPTION, "FIELD_MATCH_OPTION",
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"match_option ENUM('NONE', 'PARTIAL', 'FULL') "
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"NOT NULL");
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m_target_def.add_field(FIELD_UPDATE_RULE, "FIELD_UPDATE_RULE",
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"update_rule ENUM(\n"
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" 'NO ACTION', 'RESTRICT',\n"
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" 'CASCADE', 'SET NULL',\n"
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" 'SET DEFAULT'\n"
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") NOT NULL");
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m_target_def.add_field(FIELD_DELETE_RULE, "FIELD_DELETE_RULE",
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"delete_rule ENUM(\n"
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" 'NO ACTION', 'RESTRICT',\n"
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" 'CASCADE', 'SET NULL',\n"
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" 'SET DEFAULT'\n"
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") NOT NULL");
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m_target_def.add_field(
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FIELD_REFERENCED_TABLE_CATALOG, "FIELD_REFERENCED_TABLE_CATALOG",
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"referenced_table_catalog "
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"VARCHAR(64) NOT NULL COLLATE " +
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String_type(Object_table_definition_impl::fs_name_collation()->name));
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m_target_def.add_field(
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FIELD_REFERENCED_TABLE_SCHEMA, "FIELD_REFERENCED_TABLE_SCHEMA",
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"referenced_table_schema "
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"VARCHAR(64) NOT NULL COLLATE " +
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String_type(Object_table_definition_impl::fs_name_collation()->name));
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m_target_def.add_field(
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FIELD_REFERENCED_TABLE, "FIELD_REFERENCED_TABLE",
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"referenced_table_name "
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"VARCHAR(64) NOT NULL COLLATE " +
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String_type(Object_table_definition_impl::fs_name_collation()->name));
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m_target_def.add_field(FIELD_OPTIONS, "FIELD_OPTIONS", "options MEDIUMTEXT");
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m_target_def.add_index(INDEX_PK_ID, "INDEX_PK_ID", "PRIMARY KEY (id)");
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m_target_def.add_index(INDEX_UK_SCHEMA_ID_NAME, "INDEX_UK_SCHEMA_ID_NAME",
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"UNIQUE KEY (schema_id, name)");
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m_target_def.add_index(INDEX_UK_TABLE_ID_NAME, "INDEX_UK_TABLE_ID_NAME",
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"UNIQUE KEY (table_id, name)");
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m_target_def.add_index(INDEX_K_REF_CATALOG_REF_SCHEMA_REF_TABLE,
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"INDEX_K_REF_CATALOG_REF_SCHEMA_REF_TABLE",
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"KEY (referenced_table_catalog, "
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"referenced_table_schema, referenced_table_name)");
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m_target_def.add_foreign_key(FK_SCHEMA_ID, "FK_SCHEMA_ID",
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"FOREIGN KEY (schema_id) REFERENCES "
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"schemata(id)");
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}
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///////////////////////////////////////////////////////////////////////////
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Object_key *Foreign_keys::create_key_by_foreign_key_name(
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Object_id schema_id, const String_type &foreign_key_name) {
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return new (std::nothrow)
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Item_name_key(FIELD_SCHEMA_ID, schema_id, FIELD_NAME, foreign_key_name,
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name_collation());
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}
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Object_key *Foreign_keys::create_key_by_table_id(Object_id table_id) {
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return new (std::nothrow)
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Parent_id_range_key(INDEX_UK_TABLE_ID_NAME, FIELD_TABLE_ID, table_id);
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}
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Object_key *Foreign_keys::create_key_by_referenced_name(
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const String_type &referenced_catalog, const String_type &referenced_schema,
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const String_type &referenced_table) {
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return new (std::nothrow) Table_reference_range_key(
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INDEX_K_REF_CATALOG_REF_SCHEMA_REF_TABLE, FIELD_REFERENCED_TABLE_CATALOG,
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referenced_catalog, FIELD_REFERENCED_TABLE_SCHEMA, referenced_schema,
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FIELD_REFERENCED_TABLE, referenced_table);
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}
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///////////////////////////////////////////////////////////////////////////
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bool Foreign_keys::check_foreign_key_exists(THD *thd, Object_id schema_id,
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const String_type &foreign_key_name,
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bool *exists) {
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DBUG_TRACE;
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Transaction_ro trx(thd, ISO_READ_COMMITTED);
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trx.otx.register_tables<dd::Foreign_key>();
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if (trx.otx.open_tables()) return true;
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const std::unique_ptr<Object_key> key(
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create_key_by_foreign_key_name(schema_id, foreign_key_name.c_str()));
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Raw_table *table = trx.otx.get_table(instance().name());
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DBUG_ASSERT(table != nullptr);
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// Find record by the object-key.
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std::unique_ptr<Raw_record> record;
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if (table->find_record(*key, record)) return true;
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if (record.get())
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*exists = true;
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else
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*exists = false;
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return false;
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}
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///////////////////////////////////////////////////////////////////////////
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} // namespace tables
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} // namespace dd
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