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fixed problem with distinct select with grouping and subqueries (BUG#7946)

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bell@sanja.is.com.ua
2005-01-20 13:56:22 +02:00
parent e05b028c80
commit 3bd203d3f6
3 changed files with 20 additions and 1 deletions
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9
mysql-test/r/derived.result
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@@ -330,3 +330,12 @@ SELECT MIN(price) min, MAX(price) max, AVG(price) avg FROM (SELECT SUBSTRING( MA
min max avg min max avg
10.00 10.00 10 10.00 10.00 10
DROP TABLE t1; DROP TABLE t1;
create table t1 (a integer, b integer);
insert into t1 values (1,4), (2,2),(2,2), (4,1),(4,1),(4,1),(4,1);
select distinct sum(b) from t1 group by a;
sum(b)
4
select distinct sum(b) from (select a,b from t1) y group by a;
sum(b)
4
drop table t1;

10
mysql-test/t/derived.test
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@@ -214,3 +214,13 @@ CREATE TABLE `t1` ( `itemid` int(11) NOT NULL default '0', `grpid` varchar(15) N
insert into t1 values (128, 'rozn', 2, now(), 10),(128, 'rozn', 1, now(), 10); insert into t1 values (128, 'rozn', 2, now(), 10),(128, 'rozn', 1, now(), 10);
SELECT MIN(price) min, MAX(price) max, AVG(price) avg FROM (SELECT SUBSTRING( MAX(concat(date_,";",price)), 12) price FROM t1 WHERE itemid=128 AND grpid='rozn' GROUP BY itemid, grpid, vendor) lastprices; SELECT MIN(price) min, MAX(price) max, AVG(price) avg FROM (SELECT SUBSTRING( MAX(concat(date_,";",price)), 12) price FROM t1 WHERE itemid=128 AND grpid='rozn' GROUP BY itemid, grpid, vendor) lastprices;
DROP TABLE t1; DROP TABLE t1;
#
# DISTINCT over grouped select on subquery in the FROM clause
#
create table t1 (a integer, b integer);
insert into t1 values (1,4), (2,2),(2,2), (4,1),(4,1),(4,1),(4,1);
select distinct sum(b) from t1 group by a;
select distinct sum(b) from (select a,b from t1) y group by a;
drop table t1;

2
sql/sql_select.cc
View File

@@ -1304,7 +1304,7 @@ JOIN::exec()
curr_join->select_distinct=0; /* Each row is unique */ curr_join->select_distinct=0; /* Each row is unique */
curr_join->join_free(0); /* Free quick selects */ curr_join->join_free(0); /* Free quick selects */
if (select_distinct && ! group_list) if (curr_join->select_distinct && ! curr_join->group_list)
{ {
thd->proc_info="Removing duplicates"; thd->proc_info="Removing duplicates";
if (curr_join->tmp_having) if (curr_join->tmp_having)