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Diffstat (limited to 'mysql-test/r/partition_range.result')
| -rw-r--r-- | mysql-test/r/partition_range.result | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/mysql-test/r/partition_range.result b/mysql-test/r/partition_range.result index 0bd7605a5c8..a080f7ff9f7 100644 --- a/mysql-test/r/partition_range.result +++ b/mysql-test/r/partition_range.result @@ -1,4 +1,18 @@ drop table if exists t1, t2; +# +# Bug#48229: group by performance issue of partitioned table +# +CREATE TABLE t1 ( +a INT, +b INT, +KEY a (a,b) +) +PARTITION BY HASH (a) PARTITIONS 1; +INSERT INTO t1 VALUES (0, 580092), (3, 894076), (4, 805483), (4, 913540), (6, 611137), (8, 171602), (9, 599495), (9, 746305), (10, 272829), (10, 847519), (12, 258869), (12, 929028), (13, 288970), (15, 20971), (15, 105839), (16, 788272), (17, 76914), (18, 827274), (19, 802258), (20, 123677), (20, 587729), (22, 701449), (25, 31565), (25, 230782), (25, 442887), (25, 733139), (25, 851020); +EXPLAIN SELECT a, MAX(b) FROM t1 WHERE a IN (10, 100, 3) GROUP BY a; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 range a a 5 NULL 4 Using where; Using index +DROP TABLE t1; create table t1 (a int) partition by range (a) subpartition by hash(to_seconds(a)) |