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WL#926 "AVG(DISTINCT) and other distincts", part 2 (out of 3): clean up

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Item_sum_count_distinct, and
deploy Unique for use with COUNT(DISTINCT) if there is no blob
column in the list of DISTINCT arguments.
This commit is contained in:
konstantin@mysql.com
2005-03-15 03:46:19 +03:00
parent 98e83555a5
commit 6a2ef5577c
8 changed files with 231 additions and 314 deletions
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98
mysql-test/r/sum_distinct.result
View File

@ -98,60 +98,60 @@ DROP TABLE t1;
CREATE TABLE t1 (id INTEGER);
CREATE TABLE t2 (id INTEGER);
INSERT INTO t1 (id) VALUES (1), (1), (1),(1);
INSERT INTO t2 (id) SELECT id FROM t1;
INSERT INTO t1 (id) SELECT id FROM t2;
INSERT INTO t1 (id) SELECT id FROM t1;
/* 8 */
INSERT INTO t1 (id) SELECT id FROM t2;
INSERT INTO t1 (id) SELECT id FROM t1;
/* 12 */
INSERT INTO t1 (id) SELECT id FROM t2;
INSERT INTO t1 (id) SELECT id FROM t1;
/* 16 */
INSERT INTO t1 (id) SELECT id FROM t2;
INSERT INTO t1 (id) SELECT id FROM t1;
/* 20 */
INSERT INTO t1 (id) SELECT id FROM t2;
INSERT INTO t1 (id) SELECT id FROM t1;
/* 24 */
DELETE FROM t2;
INSERT INTO t2 (id) SELECT id+1 FROM t1;
INSERT INTO t1 SELECT id FROM t2;
DELETE FROM t2;
INSERT INTO t2 (id) SELECT id+2 FROM t1;
INSERT INTO t1 SELECT id FROM t2;
DELETE FROM t2;
INSERT INTO t2 (id) SELECT id+4 FROM t1;
INSERT INTO t1 SELECT id FROM t2;
DELETE FROM t2;
INSERT INTO t2 (id) SELECT id+8 FROM t1;
INSERT INTO t1 SELECT id FROM t2;
DELETE FROM t2;
INSERT INTO t2 (id) SELECT id+16 FROM t1;
INSERT INTO t1 SELECT id FROM t2;
DELETE FROM t2;
INSERT INTO t2 (id) SELECT id+32 FROM t1;
INSERT INTO t1 SELECT id FROM t2;
DELETE FROM t2;
INSERT INTO t2 (id) SELECT id+64 FROM t1;
INSERT INTO t1 SELECT id FROM t2;
DELETE FROM t2;
INSERT INTO t2 (id) SELECT id+128 FROM t1;
INSERT INTO t1 SELECT id FROM t2;
DELETE FROM t2;
INSERT INTO t2 (id) SELECT id+256 FROM t1;
INSERT INTO t1 SELECT id FROM t2;
DELETE FROM t2;
INSERT INTO t2 (id) SELECT id+512 FROM t1;
INSERT INTO t1 SELECT id FROM t2;
DELETE FROM t2;
INSERT INTO t2 (id) SELECT id+1024 FROM t1;
INSERT INTO t1 SELECT id FROM t2;
DELETE FROM t2;
INSERT INTO t2 (id) SELECT id+2048 FROM t1;
INSERT INTO t1 SELECT id FROM t2;
DELETE FROM t2;
INSERT INTO t2 (id) SELECT id+4096 FROM t1;
INSERT INTO t1 SELECT id FROM t2;
DELETE FROM t2;
INSERT INTO t2 (id) SELECT id+8192 FROM t1;
INSERT INTO t1 SELECT id FROM t2;
DELETE FROM t2;
INSERT INTO t1 SELECT id+1 FROM t1;
INSERT INTO t1 SELECT id+2 FROM t1;
INSERT INTO t1 SELECT id+4 FROM t1;
INSERT INTO t1 SELECT id+8 FROM t1;
INSERT INTO t1 SELECT id+16 FROM t1;
INSERT INTO t1 SELECT id+32 FROM t1;
INSERT INTO t1 SELECT id+64 FROM t1;
INSERT INTO t1 SELECT id+128 FROM t1;
INSERT INTO t1 SELECT id+256 FROM t1;
INSERT INTO t1 SELECT id+512 FROM t1;
SELECT AVG(DISTINCT id) FROM t1 GROUP BY id % 13;
AVG(DISTINCT id)
513.5000
508.0000
509.0000
510.0000
511.0000
512.0000
513.0000
514.0000
515.0000
516.0000
517.0000
511.5000
512.5000
SELECT SUM(DISTINCT id)/COUNT(DISTINCT id) FROM t1 GROUP BY id % 13;
SUM(DISTINCT id)/COUNT(DISTINCT id)
513.50000
508.00000
509.00000
510.00000
511.00000
512.00000
513.00000
514.00000
515.00000
516.00000
517.00000
511.50000
512.50000
INSERT INTO t1 SELECT id+1024 FROM t1;
INSERT INTO t1 SELECT id+2048 FROM t1;
INSERT INTO t1 SELECT id+4096 FROM t1;
INSERT INTO t1 SELECT id+8192 FROM t1;
INSERT INTO t2 SELECT id FROM t1 ORDER BY id*rand();
SELECT SUM(DISTINCT id) sm FROM t1;
sm