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Diffstat (limited to 'mysql-test/main/selectivity.test')
| -rw-r--r-- | mysql-test/main/selectivity.test | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/mysql-test/main/selectivity.test b/mysql-test/main/selectivity.test index 2a0cc823eb4..1d96dc0bf80 100644 --- a/mysql-test/main/selectivity.test +++ b/mysql-test/main/selectivity.test @@ -1281,6 +1281,51 @@ drop table t1; --echo # End of 10.1 tests +--echo # +--echo # MDEV-22583: Selectivity for BIT columns in filtered column for EXPLAIN is incorrect +--echo # + +SET optimizer_use_condition_selectivity=4; +SET histogram_size=255; +CREATE TABLE t1 (a BIT(32), b INT); +INSERT INTO t1 VALUES (80, 80), (81, 81), (82, 82); +ANALYZE TABLE t1 PERSISTENT FOR ALL; +EXPLAIN EXTENDED SELECT * from t1 where t1.a >= 81; +SELECT HEX(a), b from t1 where t1.a >= 81; + +set optimizer_use_condition_selectivity= @save_optimizer_use_condition_selectivity; +set histogram_size=@save_histogram_size; +DROP TABLE t1; + +--echo # +--echo # MDEV-19474: Histogram statistics are used even with optimizer_use_condition_selectivity=3 +--echo # + +CREATE TABLE t1(a int); +INSERT INTO t1 values (1),(2),(2),(3),(4); +SET optimizer_use_condition_selectivity=4; +SET histogram_size= 255; + +set use_stat_tables='preferably'; + +ANALYZE TABLE t1 PERSISTENT FOR ALL; + +EXPLAIN EXTENDED SELECT * FROM t1 WHERE a=2; +SET optimizer_use_condition_selectivity=3; + +--echo # filtered should show 25 % +EXPLAIN EXTENDED SELECT * FROM t1 WHERE a=2; +FLUSH TABLES; + +EXPLAIN EXTENDED SELECT * FROM t1 WHERE a=2; +set optimizer_use_condition_selectivity= @save_optimizer_use_condition_selectivity; +set histogram_size=@save_histogram_size; +set use_stat_tables= @save_use_stat_tables; + +DROP TABLE t1; + +--echo # End of 10.2 tests + # # Clean up # |