Commit 46102bc2 authored by unknown's avatar unknown

restore

parent 64989d98
...@@ -1293,6 +1293,22 @@ id tid val ...@@ -1293,6 +1293,22 @@ id tid val
42749 72 VOLN ADSL 42749 72 VOLN ADSL
44205 72 VOLN ADSL 44205 72 VOLN ADSL
DROP TABLE t1; DROP TABLE t1;
create table t1(a char(200) collate utf8_unicode_ci NOT NULL default '')
default charset=utf8 collate=utf8_unicode_ci;
insert into t1 values (unhex('65')), (unhex('C3A9')), (unhex('65'));
explain select distinct a from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using temporary
select distinct a from t1;
a
e
explain select a from t1 group by a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using temporary; Using filesort
select a from t1 group by a;
a
e
drop table t1;
CREATE TABLE t1(id varchar(20) NOT NULL) DEFAULT CHARSET=utf8; CREATE TABLE t1(id varchar(20) NOT NULL) DEFAULT CHARSET=utf8;
INSERT INTO t1 VALUES ('xxx'), ('aa'), ('yyy'), ('aa'); INSERT INTO t1 VALUES ('xxx'), ('aa'), ('yyy'), ('aa');
SELECT id FROM t1; SELECT id FROM t1;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment