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Diffstat (limited to 'mysql-test/suite/innodb/t/count_distinct.test')
-rw-r--r-- | mysql-test/suite/innodb/t/count_distinct.test | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/mysql-test/suite/innodb/t/count_distinct.test b/mysql-test/suite/innodb/t/count_distinct.test new file mode 100644 index 00000000000..94a70260e23 --- /dev/null +++ b/mysql-test/suite/innodb/t/count_distinct.test @@ -0,0 +1,15 @@ +--source include/have_innodb.inc + +# +# MDEV-4925 Wrong result - count(distinct), Using index for group-by (scanning) +# +CREATE TABLE t1 ( + id int NOT NULL AUTO_INCREMENT, + a int NOT NULL, + b int NOT NULL, + PRIMARY KEY (id), + UNIQUE KEY ba (b, a) +) ENGINE=InnoDB; +INSERT INTO t1 (a, b) VALUES(1,101),(1,102),(1,103),(1,104),(1,105),(1,106),(1,107),(1,108),(1,109),(1,110); +SELECT COUNT(DISTINCT b) FROM t1 WHERE a = 1; +DROP TABLE t1; |