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MDEV-22165 CONVERT TABLE: move in partition from existing table

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Syntax for CONVERT TABLE

ALTER TABLE tbl_name CONVERT TABLE tbl_name TO PARTITION partition_name partition_spec

Examples:

    ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 VALUES LESS THAN MAX_VALUE();

New ALTER_PARTITION_CONVERT_IN command for
fast_alter_partition_table() is done in alter_partition_convert_in()
function which basically does ha_rename_table().

Table structure and data check is basically the same as in EXCHANGE
PARTITION command. And these are done by
compare_table_with_partition() and check_table_data().

Atomic DDL is done by the scheme from MDEV-22166 (see the
corresponding commit message). The only differnce is that it also has
to drop source table frm and that is done by WFRM_DROP_CONVERTED_FROM.

Initial patch was done by Dmitry Shulga <dmitry.shulga@mariadb.com>
This commit is contained in:
Aleksey Midenkov
2021-09-28 12:40:06 +03:00
committed by Sergei Golubchik
parent 7da721be31
commit 69724805bc
17 changed files with 2410 additions and 325 deletions
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4
sql/sql_table.cc
View File

@ -875,7 +875,6 @@ bool mysql_write_frm(ALTER_PARTITION_PARAM_TYPE *lpt, uint flags)
#else /* !WITH_PARTITION_STORAGE_ENGINE */
DBUG_ASSERT(!(flags & WFRM_WRITE_EXTRACTED));
DBUG_ASSERT(!(flags & WFRM_BACKUP_ORIGINAL));
DBUG_ASSERT(!(flags & WFRM_DROP_BACKUP));
#endif /* !WITH_PARTITION_STORAGE_ENGINE */
if (flags & WFRM_INSTALL_SHADOW)
{
@ -9688,7 +9687,8 @@ bool mysql_alter_table(THD *thd, const LEX_CSTRING *new_db,
Table maybe does not exist, but we got an exclusive lock
on the name, now we can safely try to find out for sure.
*/
if (ha_table_exists(thd, &alter_ctx.new_db, &alter_ctx.new_name))
if (!(alter_info->partition_flags & ALTER_PARTITION_CONVERT_IN) &&
ha_table_exists(thd, &alter_ctx.new_db, &alter_ctx.new_name))
{
/* Table will be closed in do_command() */
my_error(ER_TABLE_EXISTS_ERROR, MYF(0), alter_ctx.new_alias.str);