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e5c4c0842d
opt_calc_index_goodness(): Correct an inaccurate condition. We can very well use a clustered index of a table that is subject to online rebuild. But we must not choose an index that has not been committed (it is a secondary index that was not fully created) or that is corrupted or not a normal B-tree index. opt_search_plan_for_table(): Remove some redundant code, now that opt_calc_index_goodness() checks against corrupted indexes. The test case allows this code to be exercised. The main observation in the following: ./mtr --rr innodb.stats_persistent rr replay var/log/mysqld.1.rr/latest-trace should be that when opt_search_plan_for_table() is being invoked by dict_stats_update_persistent() on the being-altered statistics table in the 2nd call after ha_innobase::inplace_alter_table(), and the fix in opt_calc_index_goodness() is absent, it would choose the code path if (n_fields == 0), that is, a full table scan, instead of searching for the record. The GDB commands to execute in "rr replay" would be as follows: break ha_innobase::inplace_alter_table continue break opt_search_plan_for_table continue continue next next … Reviewed by: Vladislav Lesin |
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