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d3b2625ba0
btr_free_externally_stored_field(): Pass w=mtr_t::OPT to
note that the BTR_EXTERN_LEN is not necessarily changing
when a multi-page ROW_FORMAT=COMPRESSED off-page column
is being freed, and to allow redundant writes to the redo
log to be optimized away.
Ever since commit 56f6dab1d0
the refactored function mtr_t::write() asserts by default
that the page contents is being changed.
21 lines
855 B
Text
21 lines
855 B
Text
#
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# MDEV-21259 Assertion 'w != NORMAL || mach_read_from_4(ptr) != val'
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# failed in mtr_t::write(), btr_free_externally_stored_field()
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#
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SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
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SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
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CREATE TABLE t1 (c TEXT, f2 INT PRIMARY KEY, f3 INT UNIQUE)
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ENGINE=InnoDB ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=4;
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SET @level= @@GLOBAL.innodb_compression_level;
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SET GLOBAL innodb_compression_level=0;
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connect prevent_purge,localhost,root;
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START TRANSACTION WITH CONSISTENT SNAPSHOT;
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connection default;
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INSERT INTO t1 VALUES('a',1,0);
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UPDATE t1 SET c= REPEAT('a b ',4096);
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REPLACE INTO t1 SELECT * FROM t1;
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disconnect prevent_purge;
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InnoDB 0 transactions not purged
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DROP TABLE t1;
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SET GLOBAL innodb_compression_level = @level;
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SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;
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