diff options
Diffstat (limited to 'mysql-test/main/selectivity.test')
| -rw-r--r-- | mysql-test/main/selectivity.test | 85 |
1 files changed, 82 insertions, 3 deletions
diff --git a/mysql-test/main/selectivity.test b/mysql-test/main/selectivity.test index 9c82a8d37a7..06a3e32da95 100644 --- a/mysql-test/main/selectivity.test +++ b/mysql-test/main/selectivity.test @@ -1319,14 +1319,93 @@ 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 +--echo # +--echo # MDEV-31067: selectivity_from_histogram >1.0 for a DOUBLE_PREC_HB histogram +--echo # +create table t0(a int); # This holds how many rows we hold in a bucket. +insert into t0 select 1 from seq_1_to_78; + +create table t1(a int); # one-third of a bucket +insert into t1 select 1 from seq_1_to_26; + +create table t10 (a int); +insert into t10 select 0 from t0, seq_1_to_4; + +insert into t10 select 8693 from t1; +insert into t10 select 8694 from t1; +insert into t10 select 8695 from t1; + + +insert into t10 select 34783 from t1; +insert into t10 select 34784 from t1; +insert into t10 select 34785 from t1; + + +insert into t10 select 34785 from t0, seq_1_to_8; + +insert into t10 select 65214 from t1; +insert into t10 select 65215 from t1; +insert into t10 select 65216 from t1; + +insert into t10 select 65216 from t0, seq_1_to_52; + +insert into t10 select 65217 from t1; +insert into t10 select 65218 from t1; +insert into t10 select 65219 from t1; + +insert into t10 select 65219 from t0; + + +insert into t10 select 73913 from t1; +insert into t10 select 73914 from t1; +insert into t10 select 73915 from t1; + +insert into t10 select 73915 from t0, seq_1_to_40; + + +insert into t10 select 78257 from t1; +insert into t10 select 78258 from t1; +insert into t10 select 78259 from t1; + +insert into t10 select 91300 from t1; +insert into t10 select 91301 from t1; +insert into t10 select 91302 from t1; + +insert into t10 select 91302 from t0, seq_1_to_6; + +insert into t10 select 91303 from t1; # Only 1/3rd of bucket matches the search tuple +insert into t10 select 91304 from t1; +insert into t10 select 91305 from t1; + +insert into t10 select 91305 from t0, seq_1_to_8; + +insert into t10 select 99998 from t1; +insert into t10 select 99999 from t1; +insert into t10 select 100000 from t1; + +set use_stat_tables=preferably; +analyze table t10 persistent for all; +flush tables; + +set @tmp=@@optimizer_trace; +set optimizer_trace=1; +explain select * from t10 where a in (91303); + +--echo # Must have selectivity_from_histogram <= 1.0: +select json_detailed(json_extract(trace, '$**.selectivity_for_columns')) +from information_schema.optimizer_trace; + +set optimizer_trace=@tmp; +drop table t0,t1,t10; + +set optimizer_use_condition_selectivity= @save_optimizer_use_condition_selectivity; +set histogram_size=@save_histogram_size; +set use_stat_tables= @save_use_stat_tables; # # Clean up # |