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Implementation of WL#1972 "Evaluate HAVING before SELECT select-list"
mysql-test/r/having.result: Added test of WL#1972 mysql-test/t/having.test: Added test of WL#1972 sql/item.cc: Name resolution for the HAVING clause searches non-aggregated GROUP BY columns.
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@ -128,3 +128,119 @@ id description c
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1 test 0
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2 test2 0
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drop table t1,t2,t3;
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drop table if exists wl1972;
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create table wl1972 (
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col1 int,
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col2 varchar(5) character set latin1 collate latin1_bin)
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engine=innodb;
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insert into wl1972 values(10,'hello');
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insert into wl1972 values(20,'hello');
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insert into wl1972 values(30,'hello');
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insert into wl1972 values(10,'bye');
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insert into wl1972 values(10,'sam');
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insert into wl1972 values(10,'bob');
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select count(*) from wl1972 group by col1 having col1 = 10;
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count(*)
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4
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select count(*) as count_col1 from wl1972 group by col1 having col1 = 10;
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count_col1
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4
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select count(*) as count_col1 from wl1972 as t1 group by col1 having col1 = 10;
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count_col1
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4
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select count(*) from wl1972 group by col2 having col2 = 'hello';
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count(*)
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3
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select count(*) from wl1972 group by col2 having col1 = 10;
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ERROR 42S22: Unknown column 'col1' in 'having clause'
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select col1 as count_col1 from wl1972 as t1 group by col1 having col1 = 10;
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count_col1
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10
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select col1 as count_col1 from wl1972 as t1 group by col1 having count_col1 = 10;
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count_col1
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10
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select col1 as count_col1 from wl1972 as t1 group by count_col1 having col1 = 10;
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count_col1
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10
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select col1 as count_col1 from wl1972 as t1 group by count_col1 having count_col1 = 10;
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count_col1
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10
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select col1 as count_col1,col2 from wl1972 as t1 group by col1,col2 having col1 = 10;
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count_col1 col2
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10 bob
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10 bye
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10 hello
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10 sam
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select col1 as count_col1,col2 from wl1972 as t1 group by col1,col2 having count_col1 = 10;
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count_col1 col2
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10 bob
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10 bye
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10 hello
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10 sam
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select col1 as count_col1,col2 from wl1972 as t1 group by col1,col2 having col2 = 'hello';
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count_col1 col2
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10 hello
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20 hello
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30 hello
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select col1 as count_col1,col2 as group_col2 from wl1972 as t1
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group by col1,col2 having group_col2 = 'hello';
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count_col1 group_col2
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10 hello
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20 hello
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30 hello
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select sum(col1) as co12 from wl1972 group by col2 having col2 10;
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '10' at line 1
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select sum(col1) as co2, count(col2) as cc from wl1972 group by col1 having col1 =10;
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co2 cc
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40 4
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select t1.col1 from wl1972 as t1 where t1.col2 in
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(select t2.col2 from wl1972 as t2
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group by t2.col1,t2.col2 having t2.col1<=10);
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col1
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10
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20
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30
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10
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10
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10
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select t1.col1 from wl1972 as t1 where t1.col2 in
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(select t2.col2 from wl1972 as t2
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group by t2.col1,t2.col2 having t2.col1<=
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(select min(t3.col1) from wl1972 as t3));
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col1
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10
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20
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30
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10
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10
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10
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drop table wl1972;
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create table wl1972 (s1 int);
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insert into wl1972 values (1),(2),(3);
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select count(*) from wl1972 group by s1 having s1 is null;
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count(*)
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select s1*0 as s1 from wl1972 group by s1 having s1 <> 0;
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s1
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select s1*0 from wl1972 group by s1 having s1 = 0;
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s1*0
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select s1 from wl1972 group by 1 having 1 = 0;
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s1
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select count(s1) from wl1972 group by s1 having count(1+1)=2;
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count(s1)
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select count(s1) from wl1972 group by s1 having s1*0=0;
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count(s1)
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1
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1
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1
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select * from wl1972 a, wl1972 b group by a.s1 having s1 is null;
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ERROR 23000: Column 's1' in having clause is ambiguous
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drop table wl1972;
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create table wl1972 (s1 char character set latin1 collate latin1_german1_ci);
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insert into wl1972 values ('ü'),('y');
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Warnings:
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Warning 1265 Data truncated for column 's1' at row 1
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select s1,count(s1) from wl1972
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group by s1 collate latin1_swedish_ci having s1 = 'y';
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s1 count(s1)
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y 1
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drop table wl1972;
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