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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.
80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
/*
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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 "mariadb.h"
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#include "sql_type.h"
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#include "sql_schema.h"
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#include "sql_class.h"
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class Schema_oracle: public Schema
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{
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public:
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Schema_oracle(const LEX_CSTRING &name)
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:Schema(name)
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{ }
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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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if (src == &type_handler_newdate)
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return thd->type_handler_for_datetime();
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return src;
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}
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};
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class Schema_maxdb: public Schema
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{
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public:
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Schema_maxdb(const LEX_CSTRING &name)
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:Schema(name)
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{ }
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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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if (src == &type_handler_timestamp ||
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src == &type_handler_timestamp2)
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return thd->type_handler_for_datetime();
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return src;
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}
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};
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Schema mariadb_schema(Lex_cstring(STRING_WITH_LEN("mariadb_schema")));
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Schema_oracle oracle_schema(Lex_cstring(STRING_WITH_LEN("oracle_schema")));
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Schema_maxdb maxdb_schema(Lex_cstring(STRING_WITH_LEN("maxdb_schema")));
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Schema *Schema::find_by_name(const LEX_CSTRING &name)
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{
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DBUG_ASSERT(name.str);
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if (mariadb_schema.eq_name(name))
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return &mariadb_schema;
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if (oracle_schema.eq_name(name))
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return &oracle_schema;
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if (maxdb_schema.eq_name(name))
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return &maxdb_schema;
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return NULL;
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}
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Schema *Schema::find_implied(THD *thd)
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{
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if (thd->variables.sql_mode & MODE_ORACLE)
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return &oracle_schema;
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if (thd->variables.sql_mode & MODE_MAXDB)
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return &maxdb_schema;
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return &mariadb_schema;
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}
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