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MDEV-4848 Wrong metadata or column type for LEAST(1.0,'10')

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MDEV-8873 Wrong field type or metadata for LEAST(int_column,string_column)
This commit is contained in:
Alexander Barkov 2015-10-01 14:07:42 +04:00
parent 3266216f2c
commit b50c607056
4 changed files with 1046 additions and 35 deletions
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923
mysql-test/r/func_hybrid_type.result
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@ -1122,10 +1122,10 @@ def if_______a_b 8 10 2 Y 32928 0 63
def if_______b_a 8 10 10 Y 32928 0 63
def ifnull___a_b 8 10 10 Y 32928 0 63
def ifnull___b_a 8 10 2 Y 32928 0 63
def least____a_b 253 10 2 Y 32 0 8
def least____b_a 253 10 2 Y 32 0 8
def greatest_a_b 253 10 10 Y 32 0 8
def greatest_b_a 253 10 10 Y 32 0 8
def least____a_b 8 10 2 Y 32928 0 63
def least____b_a 8 10 2 Y 32928 0 63
def greatest_a_b 8 10 10 Y 32928 0 63
def greatest_b_a 8 10 10 Y 32928 0 63
case_____a_b 4294967295
case_____b_a 50
coalesce_a_b 4294967295
@ -1392,5 +1392,920 @@ t2 CREATE TABLE `t2` (
DROP TABLE t2;
DROP TABLE t1;
#
CREATE TABLE t1 (a FLOAT, b SMALLINT);
INSERT INTO t1 VALUES (1,-32678);
SELECT
a AS ___________a,
CASE WHEN a IS NOT NULL THEN a END AS case_______a,
CASE WHEN a IS NOT NULL THEN a ELSE a END AS case_____a_a,
COALESCE(a) AS coalesce___a,
COALESCE(a, a) AS coalesce_a_a,
IF(a IS NULL, a, a) AS if_______a_a,
IFNULL(a, a) AS ifnull___a_a,
LEAST(a, a) AS least____a_a,
GREATEST(a, a) AS greatest_a_a,
b AS ___________b,
CASE WHEN a IS NOT NULL THEN b END AS case_______b,
CASE WHEN a IS NOT NULL THEN b ELSE b END AS case_____b_b,
COALESCE(b) AS coalesce___b,
COALESCE(b, b) AS coalesce_b_b,
IF(a IS NULL, b, b) AS if_______b_b,
IFNULL(b, b) AS ifnull___b_b,
LEAST(b, b) AS least____b_b,
GREATEST(b, b) AS greatest_b_b
FROM t1;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def test t1 t1 a ___________a 4 12 1 Y 32768 31 63
def case_______a 4 12 1 Y 32896 31 63
def case_____a_a 4 12 1 Y 32896 31 63
def coalesce___a 4 12 1 Y 32896 31 63
def coalesce_a_a 4 12 1 Y 32896 31 63
def if_______a_a 4 12 1 Y 32896 31 63
def ifnull___a_a 4 12 1 Y 32896 31 63
def least____a_a 5 23 1 Y 32896 31 63
def greatest_a_a 5 23 1 Y 32896 31 63
def test t1 t1 b ___________b 2 6 6 Y 32768 0 63
def case_______b 2 6 6 Y 32896 0 63
def case_____b_b 2 6 6 Y 32896 0 63
def coalesce___b 2 6 6 Y 32896 0 63
def coalesce_b_b 2 6 6 Y 32896 0 63
def if_______b_b 2 6 6 Y 32896 0 63
def ifnull___b_b 2 6 6 Y 32896 0 63
def least____b_b 2 6 6 Y 32896 0 63
def greatest_b_b 2 6 6 Y 32896 0 63
___________a 1
case_______a 1
case_____a_a 1
coalesce___a 1
coalesce_a_a 1
if_______a_a 1
ifnull___a_a 1
least____a_a 1
greatest_a_a 1
___________b -32678
case_______b -32678
case_____b_b -32678
coalesce___b -32678
coalesce_b_b -32678
if_______b_b -32678
ifnull___b_b -32678
least____b_b -32678
greatest_b_b -32678
SELECT
CASE WHEN a IS NOT NULL THEN a ELSE b END AS case_____a_b,
CASE WHEN a IS NOT NULL THEN b ELSE a END AS case_____b_a,
COALESCE(a, b) AS coalesce_a_b,
COALESCE(b, a) AS coalesce_b_a,
IF(a IS NULL, a, b) AS if_______a_b,
IF(a IS NULL, b, a) AS if_______b_a,
IFNULL(a, b) AS ifnull___a_b,
IFNULL(b, a) AS ifnull___b_a,
LEAST(a, b) AS least____a_b,
LEAST(b, a) AS least____b_a,
GREATEST(a, b) AS greatest_a_b,
GREATEST(b, a) AS greatest_b_a
FROM t1;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def case_____a_b 4 12 1 Y 32896 31 63
def case_____b_a 4 12 6 Y 32896 31 63
def coalesce_a_b 4 12 1 Y 32896 31 63
def coalesce_b_a 4 12 6 Y 32896 31 63
def if_______a_b 4 12 6 Y 32896 31 63
def if_______b_a 4 12 1 Y 32896 31 63
def ifnull___a_b 4 12 1 Y 32896 31 63
def ifnull___b_a 4 12 6 Y 32896 31 63
def least____a_b 5 23 6 Y 32896 31 63
def least____b_a 5 23 6 Y 32896 31 63
def greatest_a_b 5 23 1 Y 32896 31 63
def greatest_b_a 5 23 1 Y 32896 31 63
case_____a_b 1
case_____b_a -32678
coalesce_a_b 1
coalesce_b_a -32678
if_______a_b -32678
if_______b_a 1
ifnull___a_b 1
ifnull___b_a -32678
least____a_b -32678
least____b_a -32678
greatest_a_b 1
greatest_b_a 1
CREATE TABLE t2 AS
SELECT
a AS ___________a,
CASE WHEN a IS NOT NULL THEN a END AS case_______a,
CASE WHEN a IS NOT NULL THEN a ELSE a END AS case_____a_a,
COALESCE(a) AS coalesce___a,
COALESCE(a, a) AS coalesce_a_a,
IF(a IS NULL, a, a) AS if_______a_a,
IFNULL(a, a) AS ifnull___a_a,
LEAST(a, a) AS least____a_a,
GREATEST(a, a) AS greatest_a_a,
b AS ___________b,
CASE WHEN a IS NOT NULL THEN b END AS case_______b,
CASE WHEN a IS NOT NULL THEN b ELSE b END AS case_____b_b,
COALESCE(b) AS coalesce___b,
COALESCE(b, b) AS coalesce_b_b,
IF(a IS NULL, b, b) AS if_______b_b,
IFNULL(b, b) AS ifnull___b_b,
LEAST(b, b) AS least____b_b,
GREATEST(b, b) AS greatest_b_b
FROM t1;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`___________a` float DEFAULT NULL,
`case_______a` double DEFAULT NULL,
`case_____a_a` double DEFAULT NULL,
`coalesce___a` double DEFAULT NULL,
`coalesce_a_a` double DEFAULT NULL,
`if_______a_a` double DEFAULT NULL,
`ifnull___a_a` float DEFAULT NULL,
`least____a_a` double DEFAULT NULL,
`greatest_a_a` double DEFAULT NULL,
`___________b` smallint(6) DEFAULT NULL,
`case_______b` int(6) DEFAULT NULL,
`case_____b_b` int(6) DEFAULT NULL,
`coalesce___b` int(6) DEFAULT NULL,
`coalesce_b_b` int(6) DEFAULT NULL,
`if_______b_b` int(6) DEFAULT NULL,
`ifnull___b_b` smallint(6) DEFAULT NULL,
`least____b_b` int(6) DEFAULT NULL,
`greatest_b_b` int(6) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t2;
CREATE TABLE t2 AS
SELECT
CASE WHEN a IS NOT NULL THEN a ELSE b END AS case_____a_b,
CASE WHEN a IS NOT NULL THEN b ELSE a END AS case_____b_a,
COALESCE(a, b) AS coalesce_a_b,
COALESCE(b, a) AS coalesce_b_a,
IF(a IS NULL, a, b) AS if_______a_b,
IF(a IS NULL, b, a) AS if_______b_a,
IFNULL(a, b) AS ifnull___a_b,
IFNULL(b, a) AS ifnull___b_a,
LEAST(a, b) AS least____a_b,
LEAST(b, a) AS least____b_a,
GREATEST(a, b) AS greatest_a_b,
GREATEST(b, a) AS greatest_b_a
FROM t1;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`case_____a_b` double DEFAULT NULL,
`case_____b_a` double DEFAULT NULL,
`coalesce_a_b` double DEFAULT NULL,
`coalesce_b_a` double DEFAULT NULL,
`if_______a_b` double DEFAULT NULL,
`if_______b_a` double DEFAULT NULL,
`ifnull___a_b` float DEFAULT NULL,
`ifnull___b_a` float DEFAULT NULL,
`least____a_b` double DEFAULT NULL,
`least____b_a` double DEFAULT NULL,
`greatest_a_b` double DEFAULT NULL,
`greatest_b_a` double DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t2;
DROP TABLE t1;
#
CREATE TABLE t1 (a VARCHAR(10), b ENUM('b'));
INSERT INTO t1 VALUES ('a','b');
SELECT
a AS ___________a,
CASE WHEN a IS NOT NULL THEN a END AS case_______a,
CASE WHEN a IS NOT NULL THEN a ELSE a END AS case_____a_a,
COALESCE(a) AS coalesce___a,
COALESCE(a, a) AS coalesce_a_a,
IF(a IS NULL, a, a) AS if_______a_a,
IFNULL(a, a) AS ifnull___a_a,
LEAST(a, a) AS least____a_a,
GREATEST(a, a) AS greatest_a_a,
b AS ___________b,
CASE WHEN a IS NOT NULL THEN b END AS case_______b,
CASE WHEN a IS NOT NULL THEN b ELSE b END AS case_____b_b,
COALESCE(b) AS coalesce___b,
COALESCE(b, b) AS coalesce_b_b,
IF(a IS NULL, b, b) AS if_______b_b,
IFNULL(b, b) AS ifnull___b_b,
LEAST(b, b) AS least____b_b,
GREATEST(b, b) AS greatest_b_b
FROM t1;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def test t1 t1 a ___________a 253 10 1 Y 0 0 8
def case_______a 253 10 1 Y 0 31 8
def case_____a_a 253 10 1 Y 0 31 8
def coalesce___a 253 10 1 Y 0 31 8
def coalesce_a_a 253 10 1 Y 0 31 8
def if_______a_a 253 10 1 Y 0 31 8
def ifnull___a_a 253 10 1 Y 0 31 8
def least____a_a 253 10 1 Y 0 31 8
def greatest_a_a 253 10 1 Y 0 31 8
def test t1 t1 b ___________b 254 1 1 Y 256 0 8
def case_______b 254 1 1 Y 0 31 8
def case_____b_b 254 1 1 Y 0 31 8
def coalesce___b 254 1 1 Y 0 31 8
def coalesce_b_b 254 1 1 Y 0 31 8
def if_______b_b 254 1 1 Y 0 31 8
def ifnull___b_b 254 1 1 Y 0 31 8
def least____b_b 254 1 1 Y 0 0 8
def greatest_b_b 254 1 1 Y 0 0 8
___________a a
case_______a a
case_____a_a a
coalesce___a a
coalesce_a_a a
if_______a_a a
ifnull___a_a a
least____a_a a
greatest_a_a a
___________b b
case_______b b
case_____b_b b
coalesce___b b
coalesce_b_b b
if_______b_b b
ifnull___b_b b
least____b_b b
greatest_b_b b
SELECT
CASE WHEN a IS NOT NULL THEN a ELSE b END AS case_____a_b,
CASE WHEN a IS NOT NULL THEN b ELSE a END AS case_____b_a,
COALESCE(a, b) AS coalesce_a_b,
COALESCE(b, a) AS coalesce_b_a,
IF(a IS NULL, a, b) AS if_______a_b,
IF(a IS NULL, b, a) AS if_______b_a,
IFNULL(a, b) AS ifnull___a_b,
IFNULL(b, a) AS ifnull___b_a,
LEAST(a, b) AS least____a_b,
LEAST(b, a) AS least____b_a,
GREATEST(a, b) AS greatest_a_b,
GREATEST(b, a) AS greatest_b_a
FROM t1;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def case_____a_b 253 10 1 Y 0 31 8
def case_____b_a 253 10 1 Y 0 31 8
def coalesce_a_b 253 10 1 Y 0 31 8
def coalesce_b_a 253 10 1 Y 0 31 8
def if_______a_b 253 10 1 Y 0 31 8
def if_______b_a 253 10 1 Y 0 31 8
def ifnull___a_b 253 10 1 Y 0 31 8
def ifnull___b_a 253 10 1 Y 0 31 8
def least____a_b 253 10 1 Y 0 31 8
def least____b_a 253 10 1 Y 0 31 8
def greatest_a_b 253 10 1 Y 0 31 8
def greatest_b_a 253 10 1 Y 0 31 8
case_____a_b a
case_____b_a b
coalesce_a_b a
coalesce_b_a b
if_______a_b b
if_______b_a a
ifnull___a_b a
ifnull___b_a b
least____a_b a
least____b_a a
greatest_a_b b
greatest_b_a b
CREATE TABLE t2 AS
SELECT
a AS ___________a,
CASE WHEN a IS NOT NULL THEN a END AS case_______a,
CASE WHEN a IS NOT NULL THEN a ELSE a END AS case_____a_a,
COALESCE(a) AS coalesce___a,
COALESCE(a, a) AS coalesce_a_a,
IF(a IS NULL, a, a) AS if_______a_a,
IFNULL(a, a) AS ifnull___a_a,
LEAST(a, a) AS least____a_a,
GREATEST(a, a) AS greatest_a_a,
b AS ___________b,
CASE WHEN a IS NOT NULL THEN b END AS case_______b,
CASE WHEN a IS NOT NULL THEN b ELSE b END AS case_____b_b,
COALESCE(b) AS coalesce___b,
COALESCE(b, b) AS coalesce_b_b,
IF(a IS NULL, b, b) AS if_______b_b,
IFNULL(b, b) AS ifnull___b_b,
LEAST(b, b) AS least____b_b,
GREATEST(b, b) AS greatest_b_b
FROM t1;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`___________a` varchar(10) DEFAULT NULL,
`case_______a` varchar(10) DEFAULT NULL,
`case_____a_a` varchar(10) DEFAULT NULL,
`coalesce___a` varchar(10) DEFAULT NULL,
`coalesce_a_a` varchar(10) DEFAULT NULL,
`if_______a_a` varchar(10) DEFAULT NULL,
`ifnull___a_a` varchar(10) DEFAULT NULL,
`least____a_a` varchar(10) DEFAULT NULL,
`greatest_a_a` varchar(10) DEFAULT NULL,
`___________b` enum('b') DEFAULT NULL,
`case_______b` varchar(1) DEFAULT NULL,
`case_____b_b` varchar(1) DEFAULT NULL,
`coalesce___b` varchar(1) DEFAULT NULL,
`coalesce_b_b` varchar(1) DEFAULT NULL,
`if_______b_b` varchar(1) DEFAULT NULL,
`ifnull___b_b` varchar(1) DEFAULT NULL,
`least____b_b` varchar(1) DEFAULT NULL,
`greatest_b_b` varchar(1) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t2;
CREATE TABLE t2 AS
SELECT
CASE WHEN a IS NOT NULL THEN a ELSE b END AS case_____a_b,
CASE WHEN a IS NOT NULL THEN b ELSE a END AS case_____b_a,
COALESCE(a, b) AS coalesce_a_b,
COALESCE(b, a) AS coalesce_b_a,
IF(a IS NULL, a, b) AS if_______a_b,
IF(a IS NULL, b, a) AS if_______b_a,
IFNULL(a, b) AS ifnull___a_b,
IFNULL(b, a) AS ifnull___b_a,
LEAST(a, b) AS least____a_b,
LEAST(b, a) AS least____b_a,
GREATEST(a, b) AS greatest_a_b,
GREATEST(b, a) AS greatest_b_a
FROM t1;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`case_____a_b` varchar(10) DEFAULT NULL,
`case_____b_a` varchar(10) DEFAULT NULL,
`coalesce_a_b` varchar(10) DEFAULT NULL,
`coalesce_b_a` varchar(10) DEFAULT NULL,
`if_______a_b` varchar(10) DEFAULT NULL,
`if_______b_a` varchar(10) DEFAULT NULL,
`ifnull___a_b` varchar(10) DEFAULT NULL,
`ifnull___b_a` varchar(10) DEFAULT NULL,
`least____a_b` varchar(10) DEFAULT NULL,
`least____b_a` varchar(10) DEFAULT NULL,
`greatest_a_b` varchar(10) DEFAULT NULL,
`greatest_b_a` varchar(10) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t2;
DROP TABLE t1;
#
CREATE TABLE t1 (a INT, b YEAR);
INSERT INTO t1 VALUES (-2147483648,2015);
SELECT
a AS ___________a,
CASE WHEN a IS NOT NULL THEN a END AS case_______a,
CASE WHEN a IS NOT NULL THEN a ELSE a END AS case_____a_a,
COALESCE(a) AS coalesce___a,
COALESCE(a, a) AS coalesce_a_a,
IF(a IS NULL, a, a) AS if_______a_a,
IFNULL(a, a) AS ifnull___a_a,
LEAST(a, a) AS least____a_a,
GREATEST(a, a) AS greatest_a_a,
b AS ___________b,
CASE WHEN a IS NOT NULL THEN b END AS case_______b,
CASE WHEN a IS NOT NULL THEN b ELSE b END AS case_____b_b,
COALESCE(b) AS coalesce___b,
COALESCE(b, b) AS coalesce_b_b,
IF(a IS NULL, b, b) AS if_______b_b,
IFNULL(b, b) AS ifnull___b_b,
LEAST(b, b) AS least____b_b,
GREATEST(b, b) AS greatest_b_b
FROM t1;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def test t1 t1 a ___________a 3 11 11 Y 32768 0 63
def case_______a 3 11 11 Y 32896 0 63
def case_____a_a 3 11 11 Y 32896 0 63
def coalesce___a 3 11 11 Y 32896 0 63
def coalesce_a_a 3 11 11 Y 32896 0 63
def if_______a_a 3 11 11 Y 32896 0 63
def ifnull___a_a 3 11 11 Y 32896 0 63
def least____a_a 3 11 11 Y 32896 0 63
def greatest_a_a 3 11 11 Y 32896 0 63
def test t1 t1 b ___________b 13 4 4 Y 32864 0 63
def case_______b 13 4 4 Y 32928 0 63
def case_____b_b 13 4 4 Y 32928 0 63
def coalesce___b 13 4 4 Y 32928 0 63
def coalesce_b_b 13 4 4 Y 32928 0 63
def if_______b_b 13 4 4 Y 32928 0 63
def ifnull___b_b 13 4 4 Y 32928 0 63
def least____b_b 13 4 4 Y 32928 0 63
def greatest_b_b 13 4 4 Y 32928 0 63
___________a -2147483648
case_______a -2147483648
case_____a_a -2147483648
coalesce___a -2147483648
coalesce_a_a -2147483648
if_______a_a -2147483648
ifnull___a_a -2147483648
least____a_a -2147483648
greatest_a_a -2147483648
___________b 2015
case_______b 2015
case_____b_b 2015
coalesce___b 2015
coalesce_b_b 2015
if_______b_b 2015
ifnull___b_b 2015
least____b_b 2015
greatest_b_b 2015
SELECT
CASE WHEN a IS NOT NULL THEN a ELSE b END AS case_____a_b,
CASE WHEN a IS NOT NULL THEN b ELSE a END AS case_____b_a,
COALESCE(a, b) AS coalesce_a_b,
COALESCE(b, a) AS coalesce_b_a,
IF(a IS NULL, a, b) AS if_______a_b,
IF(a IS NULL, b, a) AS if_______b_a,
IFNULL(a, b) AS ifnull___a_b,
IFNULL(b, a) AS ifnull___b_a,
LEAST(a, b) AS least____a_b,
LEAST(b, a) AS least____b_a,
GREATEST(a, b) AS greatest_a_b,
GREATEST(b, a) AS greatest_b_a
FROM t1;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def case_____a_b 246 11 11 Y 32896 0 63
def case_____b_a 246 11 4 Y 32896 0 63
def coalesce_a_b 246 11 11 Y 32896 0 63
def coalesce_b_a 246 11 4 Y 32896 0 63
def if_______a_b 246 11 4 Y 32896 0 63
def if_______b_a 246 11 11 Y 32896 0 63
def ifnull___a_b 246 11 11 Y 32896 0 63
def ifnull___b_a 246 11 4 Y 32896 0 63
def least____a_b 246 11 11 Y 32896 0 63
def least____b_a 246 11 11 Y 32896 0 63
def greatest_a_b 246 11 4 Y 32896 0 63
def greatest_b_a 246 11 4 Y 32896 0 63
case_____a_b -2147483648
case_____b_a 2015
coalesce_a_b -2147483648
coalesce_b_a 2015
if_______a_b 2015
if_______b_a -2147483648
ifnull___a_b -2147483648
ifnull___b_a 2015
least____a_b -2147483648
least____b_a -2147483648
greatest_a_b 2015
greatest_b_a 2015
CREATE TABLE t2 AS
SELECT
a AS ___________a,
CASE WHEN a IS NOT NULL THEN a END AS case_______a,
CASE WHEN a IS NOT NULL THEN a ELSE a END AS case_____a_a,
COALESCE(a) AS coalesce___a,
COALESCE(a, a) AS coalesce_a_a,
IF(a IS NULL, a, a) AS if_______a_a,
IFNULL(a, a) AS ifnull___a_a,
LEAST(a, a) AS least____a_a,
GREATEST(a, a) AS greatest_a_a,
b AS ___________b,
CASE WHEN a IS NOT NULL THEN b END AS case_______b,
CASE WHEN a IS NOT NULL THEN b ELSE b END AS case_____b_b,
COALESCE(b) AS coalesce___b,
COALESCE(b, b) AS coalesce_b_b,
IF(a IS NULL, b, b) AS if_______b_b,
IFNULL(b, b) AS ifnull___b_b,
LEAST(b, b) AS least____b_b,
GREATEST(b, b) AS greatest_b_b
FROM t1;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`___________a` int(11) DEFAULT NULL,
`case_______a` int(11) DEFAULT NULL,
`case_____a_a` int(11) DEFAULT NULL,
`coalesce___a` int(11) DEFAULT NULL,
`coalesce_a_a` int(11) DEFAULT NULL,
`if_______a_a` int(11) DEFAULT NULL,
`ifnull___a_a` int(11) DEFAULT NULL,
`least____a_a` int(11) DEFAULT NULL,
`greatest_a_a` int(11) DEFAULT NULL,
`___________b` year(4) DEFAULT NULL,
`case_______b` int(4) unsigned DEFAULT NULL,
`case_____b_b` int(4) unsigned DEFAULT NULL,
`coalesce___b` int(4) unsigned DEFAULT NULL,
`coalesce_b_b` int(4) unsigned DEFAULT NULL,
`if_______b_b` int(4) unsigned DEFAULT NULL,
`ifnull___b_b` year(4) DEFAULT NULL,
`least____b_b` int(4) unsigned DEFAULT NULL,
`greatest_b_b` int(4) unsigned DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t2;
CREATE TABLE t2 AS
SELECT
CASE WHEN a IS NOT NULL THEN a ELSE b END AS case_____a_b,
CASE WHEN a IS NOT NULL THEN b ELSE a END AS case_____b_a,
COALESCE(a, b) AS coalesce_a_b,
COALESCE(b, a) AS coalesce_b_a,
IF(a IS NULL, a, b) AS if_______a_b,
IF(a IS NULL, b, a) AS if_______b_a,
IFNULL(a, b) AS ifnull___a_b,
IFNULL(b, a) AS ifnull___b_a,
LEAST(a, b) AS least____a_b,
LEAST(b, a) AS least____b_a,
GREATEST(a, b) AS greatest_a_b,
GREATEST(b, a) AS greatest_b_a
FROM t1;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`case_____a_b` decimal(10,0) DEFAULT NULL,
`case_____b_a` decimal(10,0) DEFAULT NULL,
`coalesce_a_b` decimal(10,0) DEFAULT NULL,
`coalesce_b_a` decimal(10,0) DEFAULT NULL,
`if_______a_b` decimal(10,0) DEFAULT NULL,
`if_______b_a` decimal(10,0) DEFAULT NULL,
`ifnull___a_b` decimal(10,0) DEFAULT NULL,
`ifnull___b_a` decimal(10,0) DEFAULT NULL,
`least____a_b` decimal(10,0) DEFAULT NULL,
`least____b_a` decimal(10,0) DEFAULT NULL,
`greatest_a_b` decimal(10,0) DEFAULT NULL,
`greatest_b_a` decimal(10,0) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t2;
DROP TABLE t1;
#
CREATE TABLE t1 (a INT UNSIGNED, b YEAR);
INSERT INTO t1 VALUES (4294967295,2015);
SELECT
a AS ___________a,
CASE WHEN a IS NOT NULL THEN a END AS case_______a,
CASE WHEN a IS NOT NULL THEN a ELSE a END AS case_____a_a,
COALESCE(a) AS coalesce___a,
COALESCE(a, a) AS coalesce_a_a,
IF(a IS NULL, a, a) AS if_______a_a,
IFNULL(a, a) AS ifnull___a_a,
LEAST(a, a) AS least____a_a,
GREATEST(a, a) AS greatest_a_a,
b AS ___________b,
CASE WHEN a IS NOT NULL THEN b END AS case_______b,
CASE WHEN a IS NOT NULL THEN b ELSE b END AS case_____b_b,
COALESCE(b) AS coalesce___b,
COALESCE(b, b) AS coalesce_b_b,
IF(a IS NULL, b, b) AS if_______b_b,
IFNULL(b, b) AS ifnull___b_b,
LEAST(b, b) AS least____b_b,
GREATEST(b, b) AS greatest_b_b
FROM t1;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def test t1 t1 a ___________a 3 10 10 Y 32800 0 63
def case_______a 3 10 10 Y 32928 0 63
def case_____a_a 3 10 10 Y 32928 0 63
def coalesce___a 3 10 10 Y 32928 0 63
def coalesce_a_a 3 10 10 Y 32928 0 63
def if_______a_a 3 10 10 Y 32928 0 63
def ifnull___a_a 3 10 10 Y 32928 0 63
def least____a_a 3 10 10 Y 32928 0 63
def greatest_a_a 3 10 10 Y 32928 0 63
def test t1 t1 b ___________b 13 4 4 Y 32864 0 63
def case_______b 13 4 4 Y 32928 0 63
def case_____b_b 13 4 4 Y 32928 0 63
def coalesce___b 13 4 4 Y 32928 0 63
def coalesce_b_b 13 4 4 Y 32928 0 63
def if_______b_b 13 4 4 Y 32928 0 63
def ifnull___b_b 13 4 4 Y 32928 0 63
def least____b_b 13 4 4 Y 32928 0 63
def greatest_b_b 13 4 4 Y 32928 0 63
___________a 4294967295
case_______a 4294967295
case_____a_a 4294967295
coalesce___a 4294967295
coalesce_a_a 4294967295
if_______a_a 4294967295
ifnull___a_a 4294967295
least____a_a 4294967295
greatest_a_a 4294967295
___________b 2015
case_______b 2015
case_____b_b 2015
coalesce___b 2015
coalesce_b_b 2015
if_______b_b 2015
ifnull___b_b 2015
least____b_b 2015
greatest_b_b 2015
SELECT
CASE WHEN a IS NOT NULL THEN a ELSE b END AS case_____a_b,
CASE WHEN a IS NOT NULL THEN b ELSE a END AS case_____b_a,
COALESCE(a, b) AS coalesce_a_b,
COALESCE(b, a) AS coalesce_b_a,
IF(a IS NULL, a, b) AS if_______a_b,
IF(a IS NULL, b, a) AS if_______b_a,
IFNULL(a, b) AS ifnull___a_b,
IFNULL(b, a) AS ifnull___b_a,
LEAST(a, b) AS least____a_b,
LEAST(b, a) AS least____b_a,
GREATEST(a, b) AS greatest_a_b,
GREATEST(b, a) AS greatest_b_a
FROM t1;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def case_____a_b 3 10 10 Y 32928 0 63
def case_____b_a 3 10 4 Y 32928 0 63
def coalesce_a_b 3 10 10 Y 32928 0 63
def coalesce_b_a 3 10 4 Y 32928 0 63
def if_______a_b 3 10 4 Y 32928 0 63
def if_______b_a 3 10 10 Y 32928 0 63
def ifnull___a_b 3 10 10 Y 32928 0 63
def ifnull___b_a 3 10 4 Y 32928 0 63
def least____a_b 3 10 4 Y 32928 0 63
def least____b_a 3 10 4 Y 32928 0 63
def greatest_a_b 3 10 10 Y 32928 0 63
def greatest_b_a 3 10 10 Y 32928 0 63
case_____a_b 4294967295
case_____b_a 2015
coalesce_a_b 4294967295
coalesce_b_a 2015
if_______a_b 2015
if_______b_a 4294967295
ifnull___a_b 4294967295
ifnull___b_a 2015
least____a_b 2015
least____b_a 2015
greatest_a_b 4294967295
greatest_b_a 4294967295
CREATE TABLE t2 AS
SELECT
a AS ___________a,
CASE WHEN a IS NOT NULL THEN a END AS case_______a,
CASE WHEN a IS NOT NULL THEN a ELSE a END AS case_____a_a,
COALESCE(a) AS coalesce___a,
COALESCE(a, a) AS coalesce_a_a,
IF(a IS NULL, a, a) AS if_______a_a,
IFNULL(a, a) AS ifnull___a_a,
LEAST(a, a) AS least____a_a,
GREATEST(a, a) AS greatest_a_a,
b AS ___________b,
CASE WHEN a IS NOT NULL THEN b END AS case_______b,
CASE WHEN a IS NOT NULL THEN b ELSE b END AS case_____b_b,
COALESCE(b) AS coalesce___b,
COALESCE(b, b) AS coalesce_b_b,
IF(a IS NULL, b, b) AS if_______b_b,
IFNULL(b, b) AS ifnull___b_b,
LEAST(b, b) AS least____b_b,
GREATEST(b, b) AS greatest_b_b
FROM t1;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`___________a` int(10) unsigned DEFAULT NULL,
`case_______a` int(10) unsigned DEFAULT NULL,
`case_____a_a` int(10) unsigned DEFAULT NULL,
`coalesce___a` int(10) unsigned DEFAULT NULL,
`coalesce_a_a` int(10) unsigned DEFAULT NULL,
`if_______a_a` int(10) unsigned DEFAULT NULL,
`ifnull___a_a` int(10) unsigned DEFAULT NULL,
`least____a_a` int(10) unsigned DEFAULT NULL,
`greatest_a_a` int(10) unsigned DEFAULT NULL,
`___________b` year(4) DEFAULT NULL,
`case_______b` int(4) unsigned DEFAULT NULL,
`case_____b_b` int(4) unsigned DEFAULT NULL,
`coalesce___b` int(4) unsigned DEFAULT NULL,
`coalesce_b_b` int(4) unsigned DEFAULT NULL,
`if_______b_b` int(4) unsigned DEFAULT NULL,
`ifnull___b_b` year(4) DEFAULT NULL,
`least____b_b` int(4) unsigned DEFAULT NULL,
`greatest_b_b` int(4) unsigned DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t2;
CREATE TABLE t2 AS
SELECT
CASE WHEN a IS NOT NULL THEN a ELSE b END AS case_____a_b,
CASE WHEN a IS NOT NULL THEN b ELSE a END AS case_____b_a,
COALESCE(a, b) AS coalesce_a_b,
COALESCE(b, a) AS coalesce_b_a,
IF(a IS NULL, a, b) AS if_______a_b,
IF(a IS NULL, b, a) AS if_______b_a,
IFNULL(a, b) AS ifnull___a_b,
IFNULL(b, a) AS ifnull___b_a,
LEAST(a, b) AS least____a_b,
LEAST(b, a) AS least____b_a,
GREATEST(a, b) AS greatest_a_b,
GREATEST(b, a) AS greatest_b_a
FROM t1;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`case_____a_b` int(10) unsigned DEFAULT NULL,
`case_____b_a` int(10) unsigned DEFAULT NULL,
`coalesce_a_b` int(10) unsigned DEFAULT NULL,
`coalesce_b_a` int(10) unsigned DEFAULT NULL,
`if_______a_b` int(10) unsigned DEFAULT NULL,
`if_______b_a` int(10) unsigned DEFAULT NULL,
`ifnull___a_b` int(10) unsigned DEFAULT NULL,
`ifnull___b_a` int(10) unsigned DEFAULT NULL,
`least____a_b` int(10) unsigned DEFAULT NULL,
`least____b_a` int(10) unsigned DEFAULT NULL,
`greatest_a_b` int(10) unsigned DEFAULT NULL,
`greatest_b_a` int(10) unsigned DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t2;
DROP TABLE t1;
#
# MDEV-8873 Wrong field type or metadata for LEAST(int_column,string_column)
#
CREATE TABLE t1 (a INT, b VARCHAR(10));
INSERT INTO t1 VALUES (-2147483648,'100x');
SELECT
a AS ___________a,
CASE WHEN a IS NOT NULL THEN a END AS case_______a,
CASE WHEN a IS NOT NULL THEN a ELSE a END AS case_____a_a,
COALESCE(a) AS coalesce___a,
COALESCE(a, a) AS coalesce_a_a,
IF(a IS NULL, a, a) AS if_______a_a,
IFNULL(a, a) AS ifnull___a_a,
LEAST(a, a) AS least____a_a,
GREATEST(a, a) AS greatest_a_a,
b AS ___________b,
CASE WHEN a IS NOT NULL THEN b END AS case_______b,
CASE WHEN a IS NOT NULL THEN b ELSE b END AS case_____b_b,
COALESCE(b) AS coalesce___b,
COALESCE(b, b) AS coalesce_b_b,
IF(a IS NULL, b, b) AS if_______b_b,
IFNULL(b, b) AS ifnull___b_b,
LEAST(b, b) AS least____b_b,
GREATEST(b, b) AS greatest_b_b
FROM t1;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def test t1 t1 a ___________a 3 11 11 Y 32768 0 63
def case_______a 3 11 11 Y 32896 0 63
def case_____a_a 3 11 11 Y 32896 0 63
def coalesce___a 3 11 11 Y 32896 0 63
def coalesce_a_a 3 11 11 Y 32896 0 63
def if_______a_a 3 11 11 Y 32896 0 63
def ifnull___a_a 3 11 11 Y 32896 0 63
def least____a_a 3 11 11 Y 32896 0 63
def greatest_a_a 3 11 11 Y 32896 0 63
def test t1 t1 b ___________b 253 10 4 Y 0 0 8
def case_______b 253 10 4 Y 0 31 8
def case_____b_b 253 10 4 Y 0 31 8
def coalesce___b 253 10 4 Y 0 31 8
def coalesce_b_b 253 10 4 Y 0 31 8
def if_______b_b 253 10 4 Y 0 31 8
def ifnull___b_b 253 10 4 Y 0 31 8
def least____b_b 253 10 4 Y 0 31 8
def greatest_b_b 253 10 4 Y 0 31 8
___________a -2147483648
case_______a -2147483648
case_____a_a -2147483648
coalesce___a -2147483648
coalesce_a_a -2147483648
if_______a_a -2147483648
ifnull___a_a -2147483648
least____a_a -2147483648
greatest_a_a -2147483648
___________b 100x
case_______b 100x
case_____b_b 100x
coalesce___b 100x
coalesce_b_b 100x
if_______b_b 100x
ifnull___b_b 100x
least____b_b 100x
greatest_b_b 100x
SELECT
CASE WHEN a IS NOT NULL THEN a ELSE b END AS case_____a_b,
CASE WHEN a IS NOT NULL THEN b ELSE a END AS case_____b_a,
COALESCE(a, b) AS coalesce_a_b,
COALESCE(b, a) AS coalesce_b_a,
IF(a IS NULL, a, b) AS if_______a_b,
IF(a IS NULL, b, a) AS if_______b_a,
IFNULL(a, b) AS ifnull___a_b,
IFNULL(b, a) AS ifnull___b_a,
LEAST(a, b) AS least____a_b,
LEAST(b, a) AS least____b_a,
GREATEST(a, b) AS greatest_a_b,
GREATEST(b, a) AS greatest_b_a
FROM t1;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def case_____a_b 253 11 11 Y 0 31 8
def case_____b_a 253 11 4 Y 0 31 8
def coalesce_a_b 253 11 11 Y 0 31 8
def coalesce_b_a 253 11 4 Y 0 31 8
def if_______a_b 253 11 4 Y 0 31 8
def if_______b_a 253 11 11 Y 0 31 8
def ifnull___a_b 253 11 11 Y 0 31 8
def ifnull___b_a 253 11 4 Y 0 31 8
def least____a_b 5 23 11 Y 32896 31 63
def least____b_a 5 23 11 Y 32896 31 63
def greatest_a_b 5 23 3 Y 32896 31 63
def greatest_b_a 5 23 3 Y 32896 31 63
case_____a_b -2147483648
case_____b_a 100x
coalesce_a_b -2147483648
coalesce_b_a 100x
if_______a_b 100x
if_______b_a -2147483648
ifnull___a_b -2147483648
ifnull___b_a 100x
least____a_b -2147483648
least____b_a -2147483648
greatest_a_b 100
greatest_b_a 100
Warnings:
Level Warning
Code 1292
Message Truncated incorrect DOUBLE value: '100x'
Level Warning
Code 1292
Message Truncated incorrect DOUBLE value: '100x'
Level Warning
Code 1292
Message Truncated incorrect DOUBLE value: '100x'
Level Warning
Code 1292
Message Truncated incorrect DOUBLE value: '100x'
CREATE TABLE t2 AS
SELECT
a AS ___________a,
CASE WHEN a IS NOT NULL THEN a END AS case_______a,
CASE WHEN a IS NOT NULL THEN a ELSE a END AS case_____a_a,
COALESCE(a) AS coalesce___a,
COALESCE(a, a) AS coalesce_a_a,
IF(a IS NULL, a, a) AS if_______a_a,
IFNULL(a, a) AS ifnull___a_a,
LEAST(a, a) AS least____a_a,
GREATEST(a, a) AS greatest_a_a,
b AS ___________b,
CASE WHEN a IS NOT NULL THEN b END AS case_______b,
CASE WHEN a IS NOT NULL THEN b ELSE b END AS case_____b_b,
COALESCE(b) AS coalesce___b,
COALESCE(b, b) AS coalesce_b_b,
IF(a IS NULL, b, b) AS if_______b_b,
IFNULL(b, b) AS ifnull___b_b,
LEAST(b, b) AS least____b_b,
GREATEST(b, b) AS greatest_b_b
FROM t1;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`___________a` int(11) DEFAULT NULL,
`case_______a` int(11) DEFAULT NULL,
`case_____a_a` int(11) DEFAULT NULL,
`coalesce___a` int(11) DEFAULT NULL,
`coalesce_a_a` int(11) DEFAULT NULL,
`if_______a_a` int(11) DEFAULT NULL,
`ifnull___a_a` int(11) DEFAULT NULL,
`least____a_a` int(11) DEFAULT NULL,
`greatest_a_a` int(11) DEFAULT NULL,
`___________b` varchar(10) DEFAULT NULL,
`case_______b` varchar(10) DEFAULT NULL,
`case_____b_b` varchar(10) DEFAULT NULL,
`coalesce___b` varchar(10) DEFAULT NULL,
`coalesce_b_b` varchar(10) DEFAULT NULL,
`if_______b_b` varchar(10) DEFAULT NULL,
`ifnull___b_b` varchar(10) DEFAULT NULL,
`least____b_b` varchar(10) DEFAULT NULL,
`greatest_b_b` varchar(10) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t2;
CREATE TABLE t2 AS
SELECT
CASE WHEN a IS NOT NULL THEN a ELSE b END AS case_____a_b,
CASE WHEN a IS NOT NULL THEN b ELSE a END AS case_____b_a,
COALESCE(a, b) AS coalesce_a_b,
COALESCE(b, a) AS coalesce_b_a,
IF(a IS NULL, a, b) AS if_______a_b,
IF(a IS NULL, b, a) AS if_______b_a,
IFNULL(a, b) AS ifnull___a_b,
IFNULL(b, a) AS ifnull___b_a,
LEAST(a, b) AS least____a_b,
LEAST(b, a) AS least____b_a,
GREATEST(a, b) AS greatest_a_b,
GREATEST(b, a) AS greatest_b_a
FROM t1;
Warnings:
Warning 1292 Truncated incorrect DOUBLE value: '100x'
Warning 1292 Truncated incorrect DOUBLE value: '100x'
Warning 1292 Truncated incorrect DOUBLE value: '100x'
Warning 1292 Truncated incorrect DOUBLE value: '100x'
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`case_____a_b` varchar(11) DEFAULT NULL,
`case_____b_a` varchar(11) DEFAULT NULL,
`coalesce_a_b` varchar(11) DEFAULT NULL,
`coalesce_b_a` varchar(11) DEFAULT NULL,
`if_______a_b` varchar(11) DEFAULT NULL,
`if_______b_a` varchar(11) DEFAULT NULL,
`ifnull___a_b` varchar(11) DEFAULT NULL,
`ifnull___b_a` varchar(11) DEFAULT NULL,
`least____a_b` double DEFAULT NULL,
`least____b_a` double DEFAULT NULL,
`greatest_a_b` double DEFAULT NULL,
`greatest_b_a` double DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t2;
DROP TABLE t1;
#
# MDEV-4848 Wrong metadata or column type for LEAST(1.0,'10')
#
SELECT LEAST(1.0,'10');
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def LEAST(1.0,'10') 5 23 1 N 32897 31 63
LEAST(1.0,'10')
1
CREATE TABLE t1 AS SELECT LEAST(1.0,'10');
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`LEAST(1.0,'10')` double NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1;
#
# End of 10.1 tests
#

44
mysql-test/t/func_hybrid_type.test
View File

@ -57,6 +57,50 @@ INSERT INTO t1 VALUES (0x32,0x32);
--source include/func_hybrid_type.inc
DROP TABLE t1;
--echo #
CREATE TABLE t1 (a FLOAT, b SMALLINT);
INSERT INTO t1 VALUES (1,-32678);
--source include/func_hybrid_type.inc
DROP TABLE t1;
--echo #
CREATE TABLE t1 (a VARCHAR(10), b ENUM('b'));
INSERT INTO t1 VALUES ('a','b');
--source include/func_hybrid_type.inc
DROP TABLE t1;
--echo #
CREATE TABLE t1 (a INT, b YEAR);
INSERT INTO t1 VALUES (-2147483648,2015);
--source include/func_hybrid_type.inc
DROP TABLE t1;
--echo #
CREATE TABLE t1 (a INT UNSIGNED, b YEAR);
INSERT INTO t1 VALUES (4294967295,2015);
--source include/func_hybrid_type.inc
DROP TABLE t1;
--echo #
--echo # MDEV-8873 Wrong field type or metadata for LEAST(int_column,string_column)
--echo #
CREATE TABLE t1 (a INT, b VARCHAR(10));
INSERT INTO t1 VALUES (-2147483648,'100x');
--source include/func_hybrid_type.inc
DROP TABLE t1;
--echo #
--echo # MDEV-4848 Wrong metadata or column type for LEAST(1.0,'10')
--echo #
--disable_ps_protocol
--enable_metadata
SELECT LEAST(1.0,'10');
--disable_metadata
--enable_ps_protocol
CREATE TABLE t1 AS SELECT LEAST(1.0,'10');
SHOW CREATE TABLE t1;
DROP TABLE t1;
--echo #
--echo # End of 10.1 tests

87
sql/item_func.cc
View File

@ -2833,7 +2833,8 @@ void Item_func_min_max::fix_length_and_dec()
maybe_null=0;
thd= current_thd;
compare_as_dates= find_date_time_item(args, arg_count, 0);
cmp_type=args[0]->result_type();
Item_result tmp_cmp_type= args[0]->cmp_type();
uint string_type_count= 0;
for (uint i=0 ; i < arg_count ; i++)
{
@ -2843,14 +2844,39 @@ void Item_func_min_max::fix_length_and_dec()
unsigned_count+= args[i]->unsigned_flag;
if (args[i]->maybe_null)
maybe_null= 1;
cmp_type= item_cmp_type(cmp_type,args[i]->result_type());
tmp_cmp_type= item_cmp_type(tmp_cmp_type, args[i]->cmp_type());
string_type_count+= args[i]->cmp_type() == STRING_RESULT;
}
unsigned_flag= unsigned_count == arg_count; // if all args are unsigned
if (cmp_type == STRING_RESULT)
switch (tmp_cmp_type) {
case TIME_RESULT:
// At least one temporal argument was found.
collation.set_numeric();
set_handler_by_field_type(compare_as_dates->field_type());
if (mysql_type_to_time_type(Item_func_min_max::field_type()) ==
MYSQL_TIMESTAMP_DATE)
decimals= 0;
else
set_if_smaller(decimals, TIME_SECOND_PART_DIGITS);
break;
case STRING_RESULT:
/*
All arguments are of string-alike types:
CHAR, VARCHAR, TEXT, BINARY, VARBINARY, BLOB, SET, ENUM
No numeric and no temporal types were found.
*/
agg_arg_charsets_for_string_result_with_comparison(collation,
args, arg_count);
else if (cmp_type == INT_RESULT)
{
set_handler_by_field_type(agg_field_type(args, arg_count, false));
break;
case INT_RESULT:
/*
All arguments have INT-alike types:
TINY, SHORT, LONG, LONGLONG, INT24, YEAR, BIT.
*/
collation.set_numeric();
fix_char_length(my_decimal_precision_to_length_no_truncation(max_int_part +
decimals,
@ -2862,32 +2888,45 @@ void Item_func_min_max::fix_length_and_dec()
If all args are of INT-alike type, but have different unsigned_flag,
then change type to DECIMAL.
*/
cmp_type= DECIMAL_RESULT;
cached_field_type= MYSQL_TYPE_NEWDECIMAL;
return;
set_handler_by_field_type(MYSQL_TYPE_NEWDECIMAL);
}
}
else if (cmp_type == DECIMAL_RESULT)
{
else
{
/*
There are only INT-alike arguments with equal unsigned_flag.
Aggregate types to get the best covering type.
Treat BIT as LONGLONG when aggregating to non-BIT types.
Possible final type: TINY, SHORT, LONG, LONGLONG, INT24, YEAR, BIT.
*/
set_handler_by_field_type(agg_field_type(args, arg_count, true));
}
break;
case DECIMAL_RESULT:
// All arguments are of DECIMAL type
collation.set_numeric();
fix_char_length(my_decimal_precision_to_length_no_truncation(max_int_part +
decimals,
decimals,
unsigned_flag));
}
else if (cmp_type == REAL_RESULT)
fix_char_length(float_length(decimals));
set_handler_by_field_type(MYSQL_TYPE_NEWDECIMAL);
break;
if (compare_as_dates)
{
cached_field_type= compare_as_dates->field_type();
if (mysql_type_to_time_type(cached_field_type) == MYSQL_TIMESTAMP_DATE)
decimals= 0;
else
set_if_smaller(decimals, TIME_SECOND_PART_DIGITS);
case ROW_RESULT:
DBUG_ASSERT(0);
// Pass through
case REAL_RESULT:
collation.set_numeric();
fix_char_length(float_length(decimals));
/*
Set type to DOUBLE, as Item_func::tmp_table_field() does not
distinguish between DOUBLE and FLOAT and always creates Field_double.
Perhaps we should eventually change this to use agg_field_type() here,
and fix Item_func::tmp_table_field() to create Field_float when possible.
*/
set_handler_by_field_type(MYSQL_TYPE_DOUBLE);
break;
}
else
cached_field_type= agg_field_type(args, arg_count, false);
}
@ -2964,7 +3003,7 @@ String *Item_func_min_max::val_str(String *str)
DBUG_ASSERT(fixed == 1);
if (compare_as_dates)
return val_string_from_date(str);
switch (cmp_type) {
switch (Item_func_min_max::result_type()) {
case INT_RESULT:
return val_string_from_int(str);
case DECIMAL_RESULT:

27
sql/item_func.h
View File

@ -986,19 +986,28 @@ public:
};
class Item_func_min_max :public Item_func
/**
Item_func_min_max does not derive from Item_func_hybrid_field_type
because the way how its methods val_xxx() and get_date() work depend
not only by its arguments, but also on the context in which
LEAST() and GREATEST() appear.
For example, using Item_func_min_max in a CAST like this:
CAST(LEAST('11','2') AS SIGNED)
forces Item_func_min_max to compare the arguments as numbers rather
than strings.
Perhaps this should be changed eventually (see MDEV-5893).
*/
class Item_func_min_max :public Item_func,
public Type_handler_hybrid_field_type
{
Item_result cmp_type;
String tmp_value;
int cmp_sign;
/* An item used for issuing warnings while string to DATETIME conversion. */
Item *compare_as_dates;
THD *thd;
protected:
enum_field_types cached_field_type;
public:
Item_func_min_max(THD *thd, List<Item> &list, int cmp_sign_arg):
Item_func(thd, list), cmp_type(INT_RESULT), cmp_sign(cmp_sign_arg),
Item_func(thd, list), cmp_sign(cmp_sign_arg),
compare_as_dates(0) {}
double val_real();
longlong val_int();
@ -1006,8 +1015,12 @@ public:
my_decimal *val_decimal(my_decimal *);
bool get_date(MYSQL_TIME *res, ulonglong fuzzy_date);
void fix_length_and_dec();
enum Item_result result_type () const { return cmp_type; }
enum_field_types field_type() const { return cached_field_type; }
enum Item_result cmp_type() const
{ return Type_handler_hybrid_field_type::cmp_type(); }
enum Item_result result_type() const
{ return Type_handler_hybrid_field_type::result_type(); }
enum_field_types field_type() const
{ return Type_handler_hybrid_field_type::field_type(); }
};
class Item_func_min :public Item_func_min_max