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MDEV-27243: Estimation for filtered rows less precise ... #7

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Added a testcase
This commit is contained in:
Sergei Petrunia 2022-01-08 22:54:23 +03:00 committed by Sergei Petrunia
parent 531dd708ef
commit d3e511d421
2 changed files with 27 additions and 0 deletions
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14
mysql-test/main/statistics_json.result
View file

@ -8241,3 +8241,17 @@ analyze select COUNT(*) FROM t1 WHERE a <='bar';
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 200 200.00 50.00 50.00 Using where
drop table t1;
#
# MDEV-27243: Estimation for filtered rows less precise ... #7
# (Testcase only)
CREATE TABLE t1 (f TIME);
INSERT INTO t1 SELECT IF(seq%2,'00:00:00',SEC_TO_TIME(seq+7200)) FROM seq_1_to_1000;
SET histogram_type= JSON_HB;
ANALYZE TABLE t1 PERSISTENT FOR ALL;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
ANALYZE SELECT * FROM t1 WHERE f > '00:01:00';
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 1000 1000.00 50.00 50.00 Using where
drop table t1;

13
mysql-test/main/statistics_json.test
View file

@ -416,3 +416,16 @@ analyze select COUNT(*) FROM t1 WHERE a >='bar';
analyze select COUNT(*) FROM t1 WHERE a <='bar';
drop table t1;
--echo #
--echo # MDEV-27243: Estimation for filtered rows less precise ... #7
--echo # (Testcase only)
CREATE TABLE t1 (f TIME);
INSERT INTO t1 SELECT IF(seq%2,'00:00:00',SEC_TO_TIME(seq+7200)) FROM seq_1_to_1000;
SET histogram_type= JSON_HB;
ANALYZE TABLE t1 PERSISTENT FOR ALL;
ANALYZE SELECT * FROM t1 WHERE f > '00:01:00';
drop table t1;