merged

INSERT INTO t1 VALUES ('trans1'), ('trans2');

CREATE TABLE t2 (id varchar(20) NOT NULL, err_comment blob NOT NULL);

INSERT INTO t2 VALUES ('trans1', 'a problem');

SELECT COUNT(DISTINCT(t1.id)), LEFT(err_comment, 256) AS comment

  FROM t1 LEFT JOIN t2 ON t1.id=t2.id GROUP BY comment;

DROP TABLE t1, t2;

#

# BUG#12695: Item_func_isnull::update_used_tables

# did not update const_item_cache

#

create table t1(f1 varchar(5) key);

insert into t1 values (1),(2);

select sql_buffer_result max(f1) is null from t1;

select sql_buffer_result max(f1)+1 from t1;

drop table t1;

#

# Bug #12266 GROUP BY expression on DATE column produces result with

#            reduced length