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d390e501eb
Refactor get_datetime_value() not to create Item_cache_temporal(), but do it always in ::fix_fields() or ::fix_length_and_dec(). Creating items at the execution time doesn't work very well with virtual columns and check constraints that are fixed and executed in different THDs.
309 lines
10 KiB
Plaintext
309 lines
10 KiB
Plaintext
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# Testing of CASE
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#
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--disable_warnings
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drop table if exists t1, t2;
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--enable_warnings
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select CASE "b" when "a" then 1 when "b" then 2 END;
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select CASE "c" when "a" then 1 when "b" then 2 END;
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select CASE "c" when "a" then 1 when "b" then 2 ELSE 3 END;
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select CASE BINARY "b" when "a" then 1 when "B" then 2 WHEN "b" then "ok" END;
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select CASE "b" when "a" then 1 when binary "B" then 2 WHEN "b" then "ok" END;
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select CASE concat("a","b") when concat("ab","") then "a" when "b" then "b" end;
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select CASE when 1=0 then "true" else "false" END;
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select CASE 1 when 1 then "one" WHEN 2 then "two" ELSE "more" END;
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explain extended select CASE 1 when 1 then "one" WHEN 2 then "two" ELSE "more" END;
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select CASE 2.0 when 1 then "one" WHEN 2.0 then "two" ELSE "more" END;
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select (CASE "two" when "one" then "1" WHEN "two" then "2" END) | 0;
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select (CASE "two" when "one" then 1.00 WHEN "two" then 2.00 END) +0.0;
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select case 1/0 when "a" then "true" else "false" END;
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select case 1/0 when "a" then "true" END;
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select (case 1/0 when "a" then "true" END) | 0;
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select (case 1/0 when "a" then "true" END) + 0.0;
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select case when 1>0 then "TRUE" else "FALSE" END;
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select case when 1<0 then "TRUE" else "FALSE" END;
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#
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# Test bug when using GROUP BY on CASE
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#
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create table t1 (a int);
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insert into t1 values(1),(2),(3),(4);
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select case a when 1 then 2 when 2 then 3 else 0 end as fcase, count(*) from t1 group by fcase;
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explain extended select case a when 1 then 2 when 2 then 3 else 0 end as fcase, count(*) from t1 group by fcase;
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select case a when 1 then "one" when 2 then "two" else "nothing" end as fcase, count(*) from t1 group by fcase;
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drop table t1;
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#
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# Test MAX(CASE ... ) that can return null
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#
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create table t1 (row int not null, col int not null, val varchar(255) not null);
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insert into t1 values (1,1,'orange'),(1,2,'large'),(2,1,'yellow'),(2,2,'medium'),(3,1,'green'),(3,2,'small');
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select max(case col when 1 then val else null end) as color from t1 group by row;
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drop table t1;
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SET NAMES latin1;
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#
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# CASE and argument types/collations aggregation into result
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#
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CREATE TABLE t1 SELECT
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CASE WHEN 1 THEN _latin1'a' COLLATE latin1_danish_ci ELSE _latin1'a' END AS c1,
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CASE WHEN 1 THEN _latin1'a' ELSE _latin1'a' COLLATE latin1_danish_ci END AS c2,
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CASE WHEN 1 THEN 'a' ELSE 1 END AS c3,
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CASE WHEN 1 THEN 1 ELSE 'a' END AS c4,
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CASE WHEN 1 THEN 'a' ELSE 1.0 END AS c5,
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CASE WHEN 1 THEN 1.0 ELSE 'a' END AS c6,
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CASE WHEN 1 THEN 1 ELSE 1.0 END AS c7,
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CASE WHEN 1 THEN 1.0 ELSE 1 END AS c8,
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CASE WHEN 1 THEN 1.0 END AS c9,
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CASE WHEN 1 THEN 0.1e1 else 0.1 END AS c10,
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CASE WHEN 1 THEN 0.1e1 else 1 END AS c11,
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CASE WHEN 1 THEN 0.1e1 else '1' END AS c12
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;
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SHOW CREATE TABLE t1;
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DROP TABLE t1;
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--error 1267
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SELECT CASE
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WHEN 1
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THEN _latin1'a' COLLATE latin1_danish_ci
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ELSE _latin1'a' COLLATE latin1_swedish_ci
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END;
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--error 1270
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SELECT CASE _latin1'a' COLLATE latin1_general_ci
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WHEN _latin1'a' COLLATE latin1_danish_ci THEN 1
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WHEN _latin1'a' COLLATE latin1_swedish_ci THEN 2
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END;
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SELECT
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CASE _latin1'a' COLLATE latin1_general_ci WHEN _latin1'A' THEN '1' ELSE 2 END,
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CASE _latin1'a' COLLATE latin1_bin WHEN _latin1'A' THEN '1' ELSE 2 END,
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CASE _latin1'a' WHEN _latin1'A' COLLATE latin1_swedish_ci THEN '1' ELSE 2 END,
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CASE _latin1'a' WHEN _latin1'A' COLLATE latin1_bin THEN '1' ELSE 2 END
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;
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#
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# COALESCE is a CASE abbrevation:
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#
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# COALESCE(v1,v2) == CASE WHEN v1 IS NOT NULL THEN v1 ELSE v2 END
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#
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# COALESCE(V1, V2, . . . ,Vn ) =
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# CASE WHEN V1 IS NOT NULL THEN V1 ELSE COALESCE (V2, . . . ,Vn) END
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#
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# Check COALESCE argument types aggregation
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--error 1267
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CREATE TABLE t1 SELECT COALESCE(_latin1'a',_latin2'a');
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--error 1267
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CREATE TABLE t1 SELECT COALESCE('a' COLLATE latin1_swedish_ci,'b' COLLATE latin1_bin);
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CREATE TABLE t1 SELECT
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COALESCE(1), COALESCE(1.0),COALESCE('a'),
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COALESCE(1,1.0), COALESCE(1,'1'),COALESCE(1.1,'1'),
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COALESCE('a' COLLATE latin1_bin,'b');
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explain extended SELECT
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COALESCE(1), COALESCE(1.0),COALESCE('a'),
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COALESCE(1,1.0), COALESCE(1,'1'),COALESCE(1.1,'1'),
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COALESCE('a' COLLATE latin1_bin,'b');
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SHOW CREATE TABLE t1;
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DROP TABLE t1;
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--error 1267
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CREATE TABLE t1 SELECT IFNULL('a' COLLATE latin1_swedish_ci, 'b' COLLATE latin1_bin);
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# Test for BUG#10151
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SELECT 'case+union+test'
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UNION
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SELECT CASE LOWER('1') WHEN LOWER('2') THEN 'BUG' ELSE 'nobug' END;
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SELECT CASE LOWER('1') WHEN LOWER('2') THEN 'BUG' ELSE 'nobug' END;
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SELECT 'case+union+test'
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UNION
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SELECT CASE '1' WHEN '2' THEN 'BUG' ELSE 'nobug' END;
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#
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# Bug #17896: problem with MIN(CASE...)
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#
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create table t1(a float, b int default 3);
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insert into t1 (a) values (2), (11), (8);
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select min(a), min(case when 1=1 then a else NULL end),
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min(case when 1!=1 then NULL else a end)
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from t1 where b=3 group by b;
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drop table t1;
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#
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# Tests for bug #9939: conversion of the arguments for COALESCE and IFNULL
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#
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CREATE TABLE t1 (EMPNUM INT);
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INSERT INTO t1 VALUES (0), (2);
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CREATE TABLE t2 (EMPNUM DECIMAL (4, 2));
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INSERT INTO t2 VALUES (0.0), (9.0);
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SELECT COALESCE(t2.EMPNUM,t1.EMPNUM) AS CEMPNUM,
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t1.EMPNUM AS EMPMUM1, t2.EMPNUM AS EMPNUM2
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FROM t1 LEFT JOIN t2 ON t1.EMPNUM=t2.EMPNUM;
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SELECT IFNULL(t2.EMPNUM,t1.EMPNUM) AS CEMPNUM,
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t1.EMPNUM AS EMPMUM1, t2.EMPNUM AS EMPNUM2
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FROM t1 LEFT JOIN t2 ON t1.EMPNUM=t2.EMPNUM;
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DROP TABLE t1,t2;
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--echo End of 4.1 tests
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#
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# #30782: Truncated UNSIGNED BIGINT columns
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#
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create table t1 (a int, b bigint unsigned);
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create table t2 (c int);
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insert into t1 (a, b) values (1,4572794622775114594), (2,18196094287899841997),
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(3,11120436154190595086);
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insert into t2 (c) values (1), (2), (3);
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select t1.a, (case t1.a when 0 then 0 else t1.b end) d from t1
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join t2 on t1.a=t2.c order by d;
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select t1.a, (case t1.a when 0 then 0 else t1.b end) d from t1
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join t2 on t1.a=t2.c where b=11120436154190595086 order by d;
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drop table t1, t2;
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--echo End of 5.0 tests
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--echo #
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--echo # Bug#19875294 ASSERTION `SRC' FAILED IN MY_STRNXFRM_UNICODE
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--echo # (SIG 6 -STRINGS/CTYPE-UTF8.C:5151)
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--echo #
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set @@sql_mode='';
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CREATE TABLE t1(c1 SET('','')CHARACTER SET ucs2);
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INSERT INTO t1 VALUES(990101.102);
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SELECT COALESCE(c1)FROM t1 ORDER BY 1;
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DROP TABLE t1;
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set @@sql_mode=default;
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#
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# lp:1001510
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# Bug #11764313 57135: CRASH IN ITEM_FUNC_CASE::FIND_ITEM WITH CASE WHEN
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# ELSE CLAUSE
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#
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CREATE TABLE t1(a YEAR);
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SELECT 1 FROM t1 WHERE a=1 AND CASE 1 WHEN a THEN 1 ELSE 1 END;
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DROP TABLE t1;
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#
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# lp:839387 Assertion `(Item_result)i != TIME_RESULT' failed with CASE + datetime
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#
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create table t1 (f1 time);
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insert t1 values ('00:00:00'),('00:01:00');
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select case t1.f1 when '00:00:00' then 1 end from t1;
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drop table t1;
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--echo #
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--echo # MDEV-9745 Crash with CASE WHEN TRUE THEN COALESCE(CAST(NULL AS UNSIGNED)) ELSE 4 END
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--echo #
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CREATE TABLE t1 SELECT CASE WHEN TRUE THEN COALESCE(CAST(NULL AS UNSIGNED)) ELSE 4 END AS a;
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DESCRIBE t1;
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DROP TABLE t1;
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CREATE TABLE t1 SELECT CASE WHEN TRUE THEN COALESCE(CAST(NULL AS UNSIGNED)) ELSE 40 END AS a;
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DESCRIBE t1;
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DROP TABLE t1;
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--echo #
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--echo # Start of 10.1 test
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--echo #
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--echo #
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--echo # MDEV-8752 Wrong result for SELECT..WHERE CASE enum_field WHEN 1 THEN 1 ELSE 0 END AND a='5'
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--echo #
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CREATE TABLE t1 (a ENUM('5','6') CHARACTER SET BINARY);
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INSERT INTO t1 VALUES ('5'),('6');
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SELECT * FROM t1 WHERE a='5';
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SELECT * FROM t1 WHERE a=1;
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SELECT * FROM t1 WHERE CASE a WHEN 1 THEN 1 ELSE 0 END;
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SELECT * FROM t1 WHERE CASE a WHEN 1 THEN 1 ELSE 0 END AND a='5';
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--echo # Multiple comparison types in CASE, not Ok to propagate
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EXPLAIN EXTENDED
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SELECT * FROM t1 WHERE CASE a WHEN 1 THEN 1 ELSE 0 END AND a='5';
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DROP TABLE t1;
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CREATE TABLE t1 (a ENUM('a','b','100'));
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INSERT INTO t1 VALUES ('a'),('b'),('100');
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SELECT * FROM t1 WHERE a='a';
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SELECT * FROM t1 WHERE CASE a WHEN 'a' THEN 1 ELSE 0 END;
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SELECT * FROM t1 WHERE CASE a WHEN 'a' THEN 1 ELSE 0 END AND a='a';
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--echo # String comparison in CASE and in the equality, ok to propagate
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EXPLAIN EXTENDED
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SELECT * FROM t1 WHERE CASE a WHEN 'a' THEN 1 ELSE 0 END AND a='a';
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SELECT * FROM t1 WHERE a=3;
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SELECT * FROM t1 WHERE CASE a WHEN 3 THEN 1 ELSE 0 END;
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SELECT * FROM t1 WHERE CASE a WHEN 3 THEN 1 ELSE 0 END AND a=3;
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--echo # Integer comparison in CASE and in the equality, not ok to propagate
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--echo # ENUM does not support this type of propagation yet.
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--echo # This can change in the future. See MDEV-8748.
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EXPLAIN EXTENDED
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SELECT * FROM t1 WHERE CASE a WHEN 3 THEN 1 ELSE 0 END AND a=3;
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SELECT * FROM t1 WHERE a=3;
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SELECT * FROM t1 WHERE CASE a WHEN '100' THEN 1 ELSE 0 END;
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SELECT * FROM t1 WHERE CASE a WHEN '100' THEN 1 ELSE 0 END AND a=3;
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--echo # String comparison in CASE, integer comparison in the equality, not Ok to propagate
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EXPLAIN EXTENDED
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SELECT * FROM t1 WHERE CASE a WHEN '100' THEN 1 ELSE 0 END AND a=3;
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SELECT * FROM t1 WHERE a='100';
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SELECT * FROM t1 WHERE CASE a WHEN 3 THEN 1 ELSE 0 END;
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SELECT * FROM t1 WHERE CASE a WHEN 3 THEN 1 ELSE 0 END AND a='100';
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--echo # Integer comparison in CASE, string comparison in the equality, not Ok to propagate
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EXPLAIN EXTENDED
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SELECT * FROM t1 WHERE CASE a WHEN 3 THEN 1 ELSE 0 END AND a='100';
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SELECT * FROM t1 WHERE a='100';
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SELECT * FROM t1 WHERE CASE a WHEN 3 THEN 1 WHEN '100' THEN 1 ELSE 0 END;
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SELECT * FROM t1 WHERE CASE a WHEN 3 THEN 1 WHEN '100' THEN 1 ELSE 0 END AND a='100';
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--echo # Multiple type comparison in CASE, string comparison in the equality, not Ok to propagate
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EXPLAIN EXTENDED
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SELECT * FROM t1 WHERE CASE a WHEN 3 THEN 1 WHEN '100' THEN 1 ELSE 0 END AND a='100';
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SELECT * FROM t1 WHERE a=3;
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SELECT * FROM t1 WHERE CASE a WHEN 3 THEN 1 WHEN '100' THEN 1 ELSE 0 END;
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SELECT * FROM t1 WHERE CASE a WHEN 3 THEN 1 WHEN '100' THEN 1 ELSE 0 END AND a=3;
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--echo # Multiple type comparison in CASE, integer comparison in the equality, not Ok to propagate
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EXPLAIN EXTENDED
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SELECT * FROM t1 WHERE CASE a WHEN 3 THEN 1 WHEN '100' THEN 1 ELSE 0 END AND a=3;
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DROP TABLE t1;
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--echo #
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--echo # End of MDEV-8752
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--echo #
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--echo #
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--echo # End of 10.1 test
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--echo #
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#
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# caching of first argument in CASE/IN for temporal types
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#
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#
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# should not convert all values to time
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select case 'foo' when time'10:00:00' then 'never' when '0' then 'bug' else 'ok' end;
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select 'foo' in (time'10:00:00','0');
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create table t1 (a time);
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insert t1 values (100000), (102030), (203040);
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# only one warning, TIME('foo') should be cached
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select case 'foo' when a then 'never' when '0' then 'bug' else 'ok' end from t1;
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select 'foo' in (a,'0') from t1;
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drop table t1;
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# first comparison should be as date, second as time
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select case '20:10:05' when date'2020-10-10' then 'never' when time'20:10:5' then 'ok' else 'bug' end;
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