mirror of
https://github.com/MariaDB/server.git
synced 2025-10-31 15:50:51 +03:00
418ae41b48
Cset exclude: kaa@polly.local|ChangeSet|20060908100829|09983 sql/item_cmpfunc.cc: Exclude sql/item_cmpfunc.h: Exclude sql/item_func.cc: Exclude sql/item_func.h: Exclude sql/log_event.cc: Exclude sql/sql_class.h: Exclude mysql-test/r/case.result: Exclude mysql-test/r/func_if.result: Exclude mysql-test/r/func_test.result: Exclude mysql-test/r/user_var.result: Exclude mysql-test/t/case.test: Exclude mysql-test/t/func_if.test: Exclude mysql-test/t/func_test.test: Exclude mysql-test/t/user_var.test: Exclude
134 lines
4.5 KiB
Plaintext
134 lines
4.5 KiB
Plaintext
#
|
|
# Testing of CASE
|
|
#
|
|
|
|
--disable_warnings
|
|
drop table if exists t1;
|
|
--enable_warnings
|
|
|
|
select CASE "b" when "a" then 1 when "b" then 2 END;
|
|
select CASE "c" when "a" then 1 when "b" then 2 END;
|
|
select CASE "c" when "a" then 1 when "b" then 2 ELSE 3 END;
|
|
select CASE BINARY "b" when "a" then 1 when "B" then 2 WHEN "b" then "ok" END;
|
|
select CASE "b" when "a" then 1 when binary "B" then 2 WHEN "b" then "ok" END;
|
|
select CASE concat("a","b") when concat("ab","") then "a" when "b" then "b" end;
|
|
select CASE when 1=0 then "true" else "false" END;
|
|
select CASE 1 when 1 then "one" WHEN 2 then "two" ELSE "more" END;
|
|
explain extended select CASE 1 when 1 then "one" WHEN 2 then "two" ELSE "more" END;
|
|
select CASE 2.0 when 1 then "one" WHEN 2.0 then "two" ELSE "more" END;
|
|
select (CASE "two" when "one" then "1" WHEN "two" then "2" END) | 0;
|
|
select (CASE "two" when "one" then 1.00 WHEN "two" then 2.00 END) +0.0;
|
|
select case 1/0 when "a" then "true" else "false" END;
|
|
select case 1/0 when "a" then "true" END;
|
|
select (case 1/0 when "a" then "true" END) | 0;
|
|
select (case 1/0 when "a" then "true" END) + 0.0;
|
|
select case when 1>0 then "TRUE" else "FALSE" END;
|
|
select case when 1<0 then "TRUE" else "FALSE" END;
|
|
|
|
#
|
|
# Test bug when using GROUP BY on CASE
|
|
#
|
|
create table t1 (a int);
|
|
insert into t1 values(1),(2),(3),(4);
|
|
select case a when 1 then 2 when 2 then 3 else 0 end as fcase, count(*) from t1 group by fcase;
|
|
explain extended select case a when 1 then 2 when 2 then 3 else 0 end as fcase, count(*) from t1 group by fcase;
|
|
select case a when 1 then "one" when 2 then "two" else "nothing" end as fcase, count(*) from t1 group by fcase;
|
|
drop table t1;
|
|
|
|
#
|
|
# Test MAX(CASE ... ) that can return null
|
|
#
|
|
|
|
create table t1 (row int not null, col int not null, val varchar(255) not null);
|
|
insert into t1 values (1,1,'orange'),(1,2,'large'),(2,1,'yellow'),(2,2,'medium'),(3,1,'green'),(3,2,'small');
|
|
select max(case col when 1 then val else null end) as color from t1 group by row;
|
|
drop table t1;
|
|
|
|
SET NAMES latin1;
|
|
|
|
#
|
|
# CASE and argument types/collations aggregation into result
|
|
#
|
|
CREATE TABLE t1 SELECT
|
|
CASE WHEN 1 THEN _latin1'a' COLLATE latin1_danish_ci ELSE _latin1'a' END AS c1,
|
|
CASE WHEN 1 THEN _latin1'a' ELSE _latin1'a' COLLATE latin1_danish_ci END AS c2,
|
|
CASE WHEN 1 THEN 'a' ELSE 1 END AS c3,
|
|
CASE WHEN 1 THEN 1 ELSE 'a' END AS c4,
|
|
CASE WHEN 1 THEN 'a' ELSE 1.0 END AS c5,
|
|
CASE WHEN 1 THEN 1.0 ELSE 'a' END AS c6,
|
|
CASE WHEN 1 THEN 1 ELSE 1.0 END AS c7,
|
|
CASE WHEN 1 THEN 1.0 ELSE 1 END AS c8,
|
|
CASE WHEN 1 THEN 1.0 END AS c9
|
|
;
|
|
SHOW CREATE TABLE t1;
|
|
DROP TABLE t1;
|
|
|
|
--error 1267
|
|
SELECT CASE
|
|
WHEN 1
|
|
THEN _latin1'a' COLLATE latin1_danish_ci
|
|
ELSE _latin1'a' COLLATE latin1_swedish_ci
|
|
END;
|
|
|
|
--error 1270
|
|
SELECT CASE _latin1'a' COLLATE latin1_general_ci
|
|
WHEN _latin1'a' COLLATE latin1_danish_ci THEN 1
|
|
WHEN _latin1'a' COLLATE latin1_swedish_ci THEN 2
|
|
END;
|
|
|
|
SELECT
|
|
CASE _latin1'a' COLLATE latin1_general_ci WHEN _latin1'A' THEN '1' ELSE 2 END,
|
|
CASE _latin1'a' COLLATE latin1_bin WHEN _latin1'A' THEN '1' ELSE 2 END,
|
|
CASE _latin1'a' WHEN _latin1'A' COLLATE latin1_swedish_ci THEN '1' ELSE 2 END,
|
|
CASE _latin1'a' WHEN _latin1'A' COLLATE latin1_bin THEN '1' ELSE 2 END
|
|
;
|
|
|
|
#
|
|
# COALESCE is a CASE abbrevation:
|
|
#
|
|
# COALESCE(v1,v2) == CASE WHEN v1 IS NOT NULL THEN v1 ELSE v2 END
|
|
#
|
|
# COALESCE(V1, V2, . . . ,Vn ) =
|
|
# CASE WHEN V1 IS NOT NULL THEN V1 ELSE COALESCE (V2, . . . ,Vn) END
|
|
#
|
|
# Check COALESCE argument types aggregation
|
|
|
|
--error 1267
|
|
CREATE TABLE t1 SELECT COALESCE(_latin1'a',_latin2'a');
|
|
--error 1267
|
|
CREATE TABLE t1 SELECT COALESCE('a' COLLATE latin1_swedish_ci,'b' COLLATE latin1_bin);
|
|
CREATE TABLE t1 SELECT
|
|
COALESCE(1), COALESCE(1.0),COALESCE('a'),
|
|
COALESCE(1,1.0), COALESCE(1,'1'),COALESCE(1.1,'1'),
|
|
COALESCE('a' COLLATE latin1_bin,'b');
|
|
explain extended SELECT
|
|
COALESCE(1), COALESCE(1.0),COALESCE('a'),
|
|
COALESCE(1,1.0), COALESCE(1,'1'),COALESCE(1.1,'1'),
|
|
COALESCE('a' COLLATE latin1_bin,'b');
|
|
SHOW CREATE TABLE t1;
|
|
DROP TABLE t1;
|
|
|
|
# Test for BUG#10151
|
|
SELECT 'case+union+test'
|
|
UNION
|
|
SELECT CASE LOWER('1') WHEN LOWER('2') THEN 'BUG' ELSE 'nobug' END;
|
|
|
|
SELECT CASE LOWER('1') WHEN LOWER('2') THEN 'BUG' ELSE 'nobug' END;
|
|
|
|
SELECT 'case+union+test'
|
|
UNION
|
|
SELECT CASE '1' WHEN '2' THEN 'BUG' ELSE 'nobug' END;
|
|
|
|
#
|
|
# Bug #17896: problem with MIN(CASE...)
|
|
#
|
|
|
|
create table t1(a float, b int default 3);
|
|
insert into t1 (a) values (2), (11), (8);
|
|
select min(a), min(case when 1=1 then a else NULL end),
|
|
min(case when 1!=1 then NULL else a end)
|
|
from t1 where b=3 group by b;
|
|
drop table t1;
|
|
|
|
# End of 4.1 tests
|