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9b431d714f
Allow ALTER TABLE ... IMPORT TABLESPACE without creating the table followed by discarding the tablespace. That is, assuming we want to import table t1 to t2, instead of CREATE TABLE t2 LIKE t1; ALTER TABLE t2 DISCARD TABLESPACE; FLUSH TABLES t1 FOR EXPORT; --copy_file $MYSQLD_DATADIR/test/t1.cfg $MYSQLD_DATADIR/test/t2.cfg --copy_file $MYSQLD_DATADIR/test/t1.ibd $MYSQLD_DATADIR/test/t2.ibd UNLOCK TABLES; ALTER TABLE t2 IMPORT TABLESPACE; We can simply do FLUSH TABLES t1 FOR EXPORT; --copy_file $MYSQLD_DATADIR/test/t1.cfg $MYSQLD_DATADIR/test/t2.cfg --copy_file $MYSQLD_DATADIR/test/t1.frm $MYSQLD_DATADIR/test/t2.frm --copy_file $MYSQLD_DATADIR/test/t1.ibd $MYSQLD_DATADIR/test/t2.ibd UNLOCK TABLES; ALTER TABLE t2 IMPORT TABLESPACE; We achieve this by creating a "stub" table in the second scenario while opening the table, where t2 does not exist but needs to import from t1. The "stub" table is similar to a table that is created but then instructed to discard its tablespace. We include tests with various row formats, encryption, with indexes and auto-increment.
21 lines
684 B
Text
21 lines
684 B
Text
#
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# MDEV-26137 ALTER TABLE IMPORT enhancement
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#
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CREATE TABLE t1(a INT PRIMARY KEY DEFAULT 42) CREATE_OPTIONS;
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INSERT INTO t1() VALUES();
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FLUSH TABLES t1 FOR EXPORT;
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UNLOCK TABLES;
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ALTER TABLE t2 IMPORT TABLESPACE;
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Warnings:
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Warning 1810 IO Read error: (2, No such file or directory) Error opening './test/t2.cfg', will attempt to import without schema verification
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Warning 1810 IO Read error: (2, No such file or directory) Error opening './test/t2.cfg', will attempt to import without schema verification
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SHOW CREATE TABLE t2;
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Table Create Table
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t2 CREATE TABLE `t2` (
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`a` int(11) NOT NULL DEFAULT 42,
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PRIMARY KEY (`a`)
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) CREATE_OPTIONS
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SELECT * FROM t2;
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a
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42
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DROP TABLE t1, t2;
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