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d63631c3fa
- Adding optional qualifiers to data types:
CREATE TABLE t1 (a schema.DATE);
Qualifiers now work only for three pre-defined schemas:
mariadb_schema
oracle_schema
maxdb_schema
These schemas are virtual (hard-coded) for now, but may turn into real
databases on disk in the future.
- mariadb_schema.TYPE now always resolves to a true MariaDB data
type TYPE without sql_mode specific translations.
- oracle_schema.DATE translates to MariaDB DATETIME.
- maxdb_schema.TIMESTAMP translates to MariaDB DATETIME.
- Fixing SHOW CREATE TABLE to use a qualifier for a data type TYPE
if the current sql_mode translates TYPE to something else.
The above changes fix the reported problem, so this script:
SET sql_mode=ORACLE;
CREATE TABLE t2 AS SELECT mariadb_date_column FROM t1;
is now replicated as:
SET sql_mode=ORACLE;
CREATE TABLE t2 (mariadb_date_column mariadb_schema.DATE);
and the slave can unambiguously treat DATE as the true MariaDB DATE
without ORACLE specific translation to DATETIME.
Similar,
SET sql_mode=MAXDB;
CREATE TABLE t2 AS SELECT mariadb_timestamp_column FROM t1;
is now replicated as:
SET sql_mode=MAXDB;
CREATE TABLE t2 (mariadb_timestamp_column mariadb_schema.TIMESTAMP);
so the slave treats TIMESTAMP as the true MariaDB TIMESTAMP
without MAXDB specific translation to DATETIME.
70 lines
2.4 KiB
C++
70 lines
2.4 KiB
C++
#ifndef SQL_SCHEMA_H_INCLUDED
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#define SQL_SCHEMA_H_INCLUDED
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/*
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Copyright (c) 2020, MariaDB Corporation.
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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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#include "mysqld.h"
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#include "lex_string.h"
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class Schema
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{
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LEX_CSTRING m_name;
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public:
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Schema(const LEX_CSTRING &name)
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:m_name(name)
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{ }
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virtual ~Schema() { }
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const LEX_CSTRING &name() const { return m_name; }
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virtual const Type_handler *map_data_type(THD *thd, const Type_handler *src)
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const
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{
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return src;
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}
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/*
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For now we have *hard-coded* compatibility schemas:
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schema_mariadb, schema_oracle, schema_maxdb.
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But eventually we'll turn then into real databases on disk.
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So the code below compares names according to the filesystem
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case sensitivity, like it is done for regular databases.
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Note, this is different to information_schema, whose name
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is always case insensitive. This is intentional!
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The assymetry will be gone when we'll implement SQL standard
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regular and delimited identifiers.
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*/
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bool eq_name(const LEX_CSTRING &name) const
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{
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#if MYSQL_VERSION_ID > 100500
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#error Remove the old code
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return !table_alias_charset->strnncoll(m_name.str, m_name.length,
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name.str, name.length);
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#else
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// Please remove this when merging to 10.5
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return !table_alias_charset->coll->strnncoll(table_alias_charset,
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(const uchar *) m_name.str,
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m_name.length,
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(const uchar *) name.str,
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name.length, FALSE);
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#endif
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}
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static Schema *find_by_name(const LEX_CSTRING &name);
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static Schema *find_implied(THD *thd);
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};
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extern Schema mariadb_schema;
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#endif // SQL_SCHEMA_H_INCLUDED
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