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2a57396e59
This is a new version of the patch instead of the reverted: MDEV-28727 ALTER TABLE ALGORITHM=NOCOPY does not work after upgrade Ignore the difference in key packing flags HA_BINARY_PACK_KEY and HA_PACK_KEY during ALTER to allow ALGORITHM=INSTANT and ALGORITHM=NOCOPY in more cases. If for some reasons (e.g. due to a bug fix such as MDEV-20704) these cumulative (over all segments) flags in KEY::flags are different for the old and new table inside compare_keys_but_name(), the difference in HA_BINARY_PACK_KEY and HA_PACK_KEY in KEY::flags is not really important: MyISAM and Aria can handle such cases well: per-segment flags are stored in MYI and MAI files anyway and they are read during ha_myisam::open() ha_maria::open() time. So indexes get opened with correct per-segment flags that were calculated during the table CREATE time, no matter what the old (CREATE time) and new (ALTER TIME) per-index compression flags are, and no matter if they are equal or not. All other engine ignore key compression flags, so this change is safe for other engines as well.
53 lines
1.3 KiB
Text
53 lines
1.3 KiB
Text
#
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# Start of 10.4 tests
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#
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#
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# MDEV-29481 mariadb-upgrade prints confusing statement
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#
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SET @debug_key_flags=NULL;
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SET default_storage_engine=ARIA;
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CREATE PROCEDURE debug_show_key_flags()
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BEGIN
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IF @debug_key_flags IS TRUE
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THEN
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FLUSH TABLES;
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-- Wrap SET into EXECUTE IMMEDIATE to avoid
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-- parse time "Unknown system variable" errors in release builds.
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EXECUTE IMMEDIATE "SET debug_dbug='+d,key'";
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SELECT * FROM t1 LIMIT 0;
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EXECUTE IMMEDIATE "SET debug_dbug=''";
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END IF;
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END;
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$$
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SHOW CREATE TABLE t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`d` double(18,7) DEFAULT NULL,
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KEY `d` (`d`)
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) ENGINE=Aria DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci PAGE_CHECKSUM=1
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CHECK TABLE t1 FOR UPGRADE;
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Table Op Msg_type Msg_text
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test.t1 check status OK
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DROP TABLE t1;
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CALL debug_show_key_flags();
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ALTER TABLE t1 MODIFY d DOUBLE DEFAULT 10, ALGORITHM=INSTANT;
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CALL debug_show_key_flags();
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DROP TABLE t1;
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CALL debug_show_key_flags();
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ALTER TABLE t1 MODIFY d DOUBLE DEFAULT 10, ALGORITHM=NOCOPY;
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CALL debug_show_key_flags();
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DROP TABLE t1;
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CALL debug_show_key_flags();
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REPAIR TABLE t1;
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Table Op Msg_type Msg_text
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test.t1 repair status OK
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CALL debug_show_key_flags();
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DROP TABLE t1;
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CALL debug_show_key_flags();
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ALTER TABLE t1 FORCE;
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CALL debug_show_key_flags();
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DROP TABLE t1;
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DROP PROCEDURE debug_show_key_flags;
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#
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# End of 10.4 tests
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#
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