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a temporary table has grown out of heap memory reserved for it and the remaining disk space is not big enough to store the table as a MyISAM table. The crash happens because the function create_myisam_from_heap does not handle safely the mem_root structure associated with the converted table in the case when an error has occurred.
29 lines
827 B
Text
29 lines
827 B
Text
-- source include/have_debug.inc
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#
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# Bug #28499: crash for grouping query when tmp_table_size is too small
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#
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DROP TABLE IF EXISTS t1;
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CREATE TABLE t1 (
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a varchar(32) character set utf8 collate utf8_bin NOT NULL,
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b varchar(32) character set utf8 collate utf8_bin NOT NULL )
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ENGINE=MyISAM DEFAULT CHARSET=utf8;
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INSERT INTO t1 VALUES
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('AAAAAAAAAA','AAAAAAAAAA'), ('AAAAAAAAAB','AAAAAAAAAB '),
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('AAAAAAAAAB','AAAAAAAAAB'), ('AAAAAAAAAC','AAAAAAAAAC'),
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('AAAAAAAAAD','AAAAAAAAAD'), ('AAAAAAAAAE','AAAAAAAAAE'),
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('AAAAAAAAAF','AAAAAAAAAF'), ('AAAAAAAAAG','AAAAAAAAAG'),
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('AAAAAAAAAH','AAAAAAAAAH'), ('AAAAAAAAAI','AAAAAAAAAI'),
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('AAAAAAAAAJ','AAAAAAAAAJ'), ('AAAAAAAAAK','AAAAAAAAAK');
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set tmp_table_size=1024;
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--error ER_DUP_KEY
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SELECT MAX(a) FROM t1 GROUP BY a,b;
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set tmp_table_size=default;
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DROP TABLE t1;
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