mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 20:12:31 +01:00
d426504b9e
Problem: Before the ALTER TABLE statement, the array dict_index_t::stat_n_diff_key_vals had proper values calculated and updated. But after the ALTER TABLE statement, all the values of this array is 0. Because of this statistics returned by innodb_rec_per_key() is different before and after the ALTER TABLE statement. Running the ANALYZE TABLE command populates the statistics correctly. Solution: After ALTER TABLE statement, set the flag dict_table_t::stat_initialized correctly so that the table statistics will be recalculated properly when the table is next loaded. But note that we still don't choose the loose index scans. This fix only ensures that an ALTER TABLE does not change the optimizer plan. rb://1639 approved by Marko and Jimmy. |
||
|---|---|---|
| .. | ||
| binlog | ||
| engines | ||
| federated | ||
| funcs_1 | ||
| funcs_2 | ||
| im | ||
| innodb | ||
| innodb_plugin | ||
| jp | ||
| large_tests | ||
| manual | ||
| ndb | ||
| ndb_team | ||
| parts | ||
| rpl | ||
| rpl_ndb | ||
| stress | ||
| sys_vars | ||