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902b13fa57
In order to fix this bug we need to distinguish whether ha_innobase::info() has been called from ::analyze() or not. Rename ::info() to ::info_low() and add a boolean parameter that tells whether the call is from ::analyze() or not. Create a new simple ::info() that just calls ::info_low(false => not called from analyze). From ::analyze() instead of ::info() call ::info_low(true => called from analyze). Approved by: Jimmy (rb://487)
46 lines
1.2 KiB
Text
46 lines
1.2 KiB
Text
#
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# Bug#57252 disabling innobase_stats_on_metadata disables ANALYZE
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# http://bugs.mysql.com/57252
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#
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-- source include/have_innodb.inc
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-- disable_query_log
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-- disable_result_log
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SET @innodb_stats_on_metadata_orig = @@innodb_stats_on_metadata;
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CREATE TABLE bug57252 (a INT, KEY akey (a)) ENGINE=INNODB;
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BEGIN;
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let $i = 10;
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while ($i) {
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eval INSERT INTO bug57252 VALUES ($i);
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dec $i;
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}
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COMMIT;
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-- enable_result_log
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SET GLOBAL innodb_stats_on_metadata=0;
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# this calls ::info() without HA_STATUS_CONST and so
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# index->stat_n_diff_key_vals[] is not copied to the mysql-visible
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# rec_per_key
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SELECT cardinality FROM information_schema.statistics
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WHERE table_name='bug57252' AND index_name='akey';
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# this calls ::info() with HA_STATUS_CONST and so
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# index->stat_n_diff_key_vals[] is copied to the mysql-visible
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# rec_per_key at the end; when the bug is present dict_update_statistics()
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# is not called beforehand and so index->stat_n_diff_key_vals[] contains
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# an outdated data and thus we get an outdated data in the result when the
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# bug is present
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ANALYZE TABLE bug57252;
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SELECT cardinality FROM information_schema.statistics
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WHERE table_name='bug57252' AND index_name='akey';
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DROP TABLE bug57252;
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SET GLOBAL innodb_stats_on_metadata = @innodb_stats_on_metadata_orig;
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