mirror of
https://github.com/MariaDB/server.git
synced 2025-01-17 20:42:30 +01:00
f02525be83
to string conversions and vice versa" Initial import of the dtoa.c code and custom wrappers around it to allow its usage from the server code. Conversion of FLOAT/DOUBLE values to DECIMAL ones or strings and vice versa has been significantly reworked. As the new algoritms are more precise than the older ones, results of such conversions may not always match those obtained from older server versions. This in turn may break compatibility for some applications. This patch also fixes the following bugs: - bug #12860 "Difference in zero padding of exponent between Unix and Windows" - bug #21497 "DOUBLE truncated to unusable value" - bug #26788 "mysqld (debug) aborts when inserting specific numbers into char fields" - bug #24541 "Data truncated..." on decimal type columns without any good reason"
454 lines
14 KiB
Text
454 lines
14 KiB
Text
select CAST(1-2 AS UNSIGNED);
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CAST(1-2 AS UNSIGNED)
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18446744073709551615
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select CAST(CAST(1-2 AS UNSIGNED) AS SIGNED INTEGER);
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CAST(CAST(1-2 AS UNSIGNED) AS SIGNED INTEGER)
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-1
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select CAST('10 ' as unsigned integer);
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CAST('10 ' as unsigned integer)
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10
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Warnings:
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Warning 1292 Truncated incorrect INTEGER value: '10 '
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select cast(-5 as unsigned) | 1, cast(-5 as unsigned) & -1;
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cast(-5 as unsigned) | 1 cast(-5 as unsigned) & -1
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18446744073709551611 18446744073709551611
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select cast(-5 as unsigned) -1, cast(-5 as unsigned) + 1;
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cast(-5 as unsigned) -1 cast(-5 as unsigned) + 1
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18446744073709551610 18446744073709551612
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select ~5, cast(~5 as signed);
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~5 cast(~5 as signed)
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18446744073709551610 -6
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explain extended select ~5, cast(~5 as signed);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select ~(5) AS `~5`,cast(~(5) as signed) AS `cast(~5 as signed)`
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select cast(5 as unsigned) -6.0;
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cast(5 as unsigned) -6.0
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-1.0
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select cast(NULL as signed), cast(1/0 as signed);
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cast(NULL as signed) cast(1/0 as signed)
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NULL NULL
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select cast(NULL as unsigned), cast(1/0 as unsigned);
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cast(NULL as unsigned) cast(1/0 as unsigned)
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NULL NULL
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select cast("A" as binary) = "a", cast(BINARY "a" as CHAR) = "A";
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cast("A" as binary) = "a" cast(BINARY "a" as CHAR) = "A"
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0 1
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select cast("2001-1-1" as DATE), cast("2001-1-1" as DATETIME);
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cast("2001-1-1" as DATE) cast("2001-1-1" as DATETIME)
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2001-01-01 2001-01-01 00:00:00
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select cast("1:2:3" as TIME);
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cast("1:2:3" as TIME)
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01:02:03
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select CONVERT("2004-01-22 21:45:33",DATE);
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CONVERT("2004-01-22 21:45:33",DATE)
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2004-01-22
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select 10+'10';
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10+'10'
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20
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select 10.0+'10';
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10.0+'10'
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20
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select 10E+0+'10';
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10E+0+'10'
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20
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select CONVERT(DATE "2004-01-22 21:45:33" USING latin1);
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CONVERT(DATE "2004-01-22 21:45:33" USING latin1)
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2004-01-22 21:45:33
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select CONVERT(DATE "2004-01-22 21:45:33",CHAR);
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CONVERT(DATE "2004-01-22 21:45:33",CHAR)
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2004-01-22 21:45:33
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select CONVERT(DATE "2004-01-22 21:45:33",CHAR(4));
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CONVERT(DATE "2004-01-22 21:45:33",CHAR(4))
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2004
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Warnings:
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Warning 1292 Truncated incorrect CHAR(4) value: '2004-01-22 21:45:33'
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select CONVERT(DATE "2004-01-22 21:45:33",BINARY(4));
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CONVERT(DATE "2004-01-22 21:45:33",BINARY(4))
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2004
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Warnings:
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Warning 1292 Truncated incorrect BINARY(4) value: '2004-01-22 21:45:33'
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select CAST(DATE "2004-01-22 21:45:33" AS BINARY(4));
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CAST(DATE "2004-01-22 21:45:33" AS BINARY(4))
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2004
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Warnings:
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Warning 1292 Truncated incorrect BINARY(4) value: '2004-01-22 21:45:33'
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select CAST(0xb3 as signed);
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CAST(0xb3 as signed)
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179
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select CAST(0x8fffffffffffffff as signed);
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CAST(0x8fffffffffffffff as signed)
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-8070450532247928833
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select CAST(0xffffffffffffffff as unsigned);
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CAST(0xffffffffffffffff as unsigned)
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18446744073709551615
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select CAST(0xfffffffffffffffe as signed);
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CAST(0xfffffffffffffffe as signed)
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-2
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select cast('-10a' as signed integer);
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cast('-10a' as signed integer)
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-10
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Warnings:
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Warning 1292 Truncated incorrect INTEGER value: '-10a'
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select cast('a10' as unsigned integer);
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cast('a10' as unsigned integer)
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0
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Warnings:
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Warning 1292 Truncated incorrect INTEGER value: 'a10'
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select 10+'a';
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10+'a'
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10
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Warnings:
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Warning 1292 Truncated incorrect DOUBLE value: 'a'
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select 10.0+cast('a' as decimal);
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10.0+cast('a' as decimal)
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10.0
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Warnings:
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Warning 1292 Truncated incorrect DECIMAL value: 'a'
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select 10E+0+'a';
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10E+0+'a'
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10
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Warnings:
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Warning 1292 Truncated incorrect DOUBLE value: 'a'
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select cast('18446744073709551616' as unsigned);
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cast('18446744073709551616' as unsigned)
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18446744073709551615
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Warnings:
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Warning 1292 Truncated incorrect INTEGER value: '18446744073709551616'
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select cast('18446744073709551616' as signed);
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cast('18446744073709551616' as signed)
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-1
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Warnings:
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Warning 1292 Truncated incorrect INTEGER value: '18446744073709551616'
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select cast('9223372036854775809' as signed);
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cast('9223372036854775809' as signed)
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-9223372036854775807
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Warnings:
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Warning 1105 Cast to signed converted positive out-of-range integer to it's negative complement
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select cast('-1' as unsigned);
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cast('-1' as unsigned)
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18446744073709551615
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Warnings:
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Warning 1105 Cast to unsigned converted negative integer to it's positive complement
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select cast('abc' as signed);
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cast('abc' as signed)
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0
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Warnings:
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Warning 1292 Truncated incorrect INTEGER value: 'abc'
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select cast('1a' as signed);
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cast('1a' as signed)
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1
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Warnings:
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Warning 1292 Truncated incorrect INTEGER value: '1a'
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select cast('' as signed);
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cast('' as signed)
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0
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Warnings:
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Warning 1292 Truncated incorrect INTEGER value: ''
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set names binary;
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select cast(_latin1'test' as char character set latin2);
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cast(_latin1'test' as char character set latin2)
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test
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select cast(_koi8r'<27><><EFBFBD><EFBFBD>' as char character set cp1251);
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cast(_koi8r'<27><><EFBFBD><EFBFBD>' as char character set cp1251)
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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create table t1 select cast(_koi8r'<27><><EFBFBD><EFBFBD>' as char character set cp1251) as t;
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`t` varchar(4) CHARACTER SET cp1251 NOT NULL DEFAULT ''
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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drop table t1;
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select
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cast(_latin1'ab' AS char) as c1,
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cast(_latin1'a ' AS char) as c2,
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cast(_latin1'abc' AS char(2)) as c3,
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cast(_latin1'a ' AS char(2)) as c4,
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hex(cast(_latin1'a' AS char(2))) as c5;
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c1 c2 c3 c4 c5
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ab a ab a 6100
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Warnings:
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Warning 1292 Truncated incorrect BINARY(2) value: 'abc'
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Warning 1292 Truncated incorrect BINARY(2) value: 'a '
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select cast(1000 as CHAR(3));
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cast(1000 as CHAR(3))
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100
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Warnings:
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Warning 1292 Truncated incorrect BINARY(3) value: '1000'
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create table t1 select
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cast(_latin1'ab' AS char) as c1,
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cast(_latin1'a ' AS char) as c2,
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cast(_latin1'abc' AS char(2)) as c3,
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cast(_latin1'a ' AS char(2)) as c4,
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cast(_latin1'a' AS char(2)) as c5;
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Warnings:
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Warning 1292 Truncated incorrect BINARY(2) value: 'abc'
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Warning 1292 Truncated incorrect BINARY(2) value: 'a '
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select c1,c2,c3,c4,hex(c5) from t1;
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c1 c2 c3 c4 hex(c5)
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ab a ab a 6100
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`c1` varbinary(2) NOT NULL DEFAULT '',
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`c2` varbinary(2) NOT NULL DEFAULT '',
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`c3` varbinary(2) NOT NULL DEFAULT '',
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`c4` varbinary(2) NOT NULL DEFAULT '',
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`c5` varbinary(2) NOT NULL DEFAULT ''
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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drop table t1;
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select
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cast(_koi8r'<27><>' AS nchar) as c1,
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cast(_koi8r'<27> ' AS nchar) as c2,
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cast(_koi8r'<27><><EFBFBD>' AS nchar(2)) as c3,
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cast(_koi8r'<27> ' AS nchar(2)) as c4,
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cast(_koi8r'<27>' AS nchar(2)) as c5;
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c1 c2 c3 c4 c5
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фг ф фг ф ф
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Warnings:
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Warning 1292 Truncated incorrect CHAR(4) value: 'фгх'
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Warning 1292 Truncated incorrect CHAR(3) value: 'ф '
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create table t1 select
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cast(_koi8r'<27><>' AS nchar) as c1,
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cast(_koi8r'<27> ' AS nchar) as c2,
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cast(_koi8r'<27><><EFBFBD>' AS nchar(2)) as c3,
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cast(_koi8r'<27> ' AS nchar(2)) as c4,
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cast(_koi8r'<27>' AS nchar(2)) as c5;
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Warnings:
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Warning 1292 Truncated incorrect CHAR(4) value: 'фгх'
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Warning 1292 Truncated incorrect CHAR(3) value: 'ф '
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select * from t1;
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c1 c2 c3 c4 c5
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фг ф фг ф ф
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`c1` varchar(2) CHARACTER SET utf8 NOT NULL DEFAULT '',
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`c2` varchar(2) CHARACTER SET utf8 NOT NULL DEFAULT '',
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`c3` varchar(2) CHARACTER SET utf8 NOT NULL DEFAULT '',
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`c4` varchar(2) CHARACTER SET utf8 NOT NULL DEFAULT '',
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`c5` varchar(2) CHARACTER SET utf8 NOT NULL DEFAULT ''
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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drop table t1;
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create table t1 (a binary(4), b char(4) character set koi8r);
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insert into t1 values (_binary'<27><><EFBFBD><EFBFBD>',_binary'<27><><EFBFBD><EFBFBD>');
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select a,b,cast(a as char character set cp1251),cast(b as binary) from t1;
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a b cast(a as char character set cp1251) cast(b as binary)
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD>
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set names koi8r;
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select a,b,cast(a as char character set cp1251),cast(b as binary) from t1;
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a b cast(a as char character set cp1251) cast(b as binary)
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD>
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set names cp1251;
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select a,b,cast(a as char character set cp1251),cast(b as binary) from t1;
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a b cast(a as char character set cp1251) cast(b as binary)
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD>
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drop table t1;
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set names binary;
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select cast("2001-1-1" as date) = "2001-01-01";
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cast("2001-1-1" as date) = "2001-01-01"
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1
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select cast("2001-1-1" as datetime) = "2001-01-01 00:00:00";
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cast("2001-1-1" as datetime) = "2001-01-01 00:00:00"
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1
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select cast("1:2:3" as TIME) = "1:02:03";
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cast("1:2:3" as TIME) = "1:02:03"
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0
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select cast(NULL as DATE);
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cast(NULL as DATE)
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NULL
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select cast(NULL as BINARY);
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cast(NULL as BINARY)
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NULL
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CREATE TABLE t1 (a enum ('aac','aab','aaa') not null);
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INSERT INTO t1 VALUES ('aaa'),('aab'),('aac');
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SELECT a, CAST(a AS CHAR) FROM t1 ORDER BY CAST(a AS UNSIGNED) ;
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a CAST(a AS CHAR)
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aac aac
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aab aab
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aaa aaa
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SELECT a, CAST(a AS CHAR(3)) FROM t1 ORDER BY CAST(a AS CHAR(2)), a;
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a CAST(a AS CHAR(3))
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aac aac
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aab aab
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aaa aaa
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Warnings:
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Warning 1292 Truncated incorrect BINARY(2) value: 'aaa'
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Warning 1292 Truncated incorrect BINARY(2) value: 'aab'
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Warning 1292 Truncated incorrect BINARY(2) value: 'aac'
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SELECT a, CAST(a AS UNSIGNED) FROM t1 ORDER BY CAST(a AS CHAR) ;
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a CAST(a AS UNSIGNED)
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aaa 3
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aab 2
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aac 1
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SELECT a, CAST(a AS CHAR(2)) FROM t1 ORDER BY CAST(a AS CHAR(3)), a;
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a CAST(a AS CHAR(2))
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aaa aa
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aab aa
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aac aa
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Warnings:
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Warning 1292 Truncated incorrect BINARY(2) value: 'aaa'
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Warning 1292 Truncated incorrect BINARY(2) value: 'aab'
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Warning 1292 Truncated incorrect BINARY(2) value: 'aac'
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DROP TABLE t1;
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select date_add(cast('2004-12-30 12:00:00' as date), interval 0 hour);
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date_add(cast('2004-12-30 12:00:00' as date), interval 0 hour)
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2004-12-30 00:00:00
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select timediff(cast('2004-12-30 12:00:00' as time), '12:00:00');
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timediff(cast('2004-12-30 12:00:00' as time), '12:00:00')
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00:00:00
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select timediff(cast('1 12:00:00' as time), '12:00:00');
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timediff(cast('1 12:00:00' as time), '12:00:00')
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24:00:00
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select cast(18446744073709551615 as unsigned);
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cast(18446744073709551615 as unsigned)
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18446744073709551615
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select cast(18446744073709551615 as signed);
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cast(18446744073709551615 as signed)
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-1
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select cast('18446744073709551615' as unsigned);
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cast('18446744073709551615' as unsigned)
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18446744073709551615
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select cast('18446744073709551615' as signed);
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cast('18446744073709551615' as signed)
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-1
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Warnings:
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Warning 1105 Cast to signed converted positive out-of-range integer to it's negative complement
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select cast('9223372036854775807' as signed);
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cast('9223372036854775807' as signed)
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9223372036854775807
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select cast(concat('184467440','73709551615') as unsigned);
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cast(concat('184467440','73709551615') as unsigned)
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18446744073709551615
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select cast(concat('184467440','73709551615') as signed);
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cast(concat('184467440','73709551615') as signed)
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-1
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Warnings:
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Warning 1105 Cast to signed converted positive out-of-range integer to it's negative complement
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select cast(repeat('1',20) as unsigned);
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cast(repeat('1',20) as unsigned)
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11111111111111111111
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select cast(repeat('1',20) as signed);
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cast(repeat('1',20) as signed)
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-7335632962598440505
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Warnings:
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Warning 1105 Cast to signed converted positive out-of-range integer to it's negative complement
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select cast(1.0e+300 as signed int);
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cast(1.0e+300 as signed int)
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9223372036854775807
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CREATE TABLE t1 (f1 double);
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INSERT INTO t1 SET f1 = -1.0e+30 ;
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INSERT INTO t1 SET f1 = +1.0e+30 ;
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SELECT f1 AS double_val, CAST(f1 AS SIGNED INT) AS cast_val FROM t1;
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double_val cast_val
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-1e30 -9223372036854775808
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1e30 9223372036854775807
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Warnings:
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Warning 1292 Truncated incorrect INTEGER value: '-1e30'
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Warning 1292 Truncated incorrect INTEGER value: '1e30'
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DROP TABLE t1;
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select isnull(date(NULL)), isnull(cast(NULL as DATE));
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isnull(date(NULL)) isnull(cast(NULL as DATE))
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1 1
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SELECT CAST(cast('01-01-01' as date) AS UNSIGNED);
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CAST(cast('01-01-01' as date) AS UNSIGNED)
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20010101
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SELECT CAST(cast('01-01-01' as date) AS SIGNED);
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CAST(cast('01-01-01' as date) AS SIGNED)
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20010101
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End of 4.1 tests
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select cast('1.2' as decimal(3,2));
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cast('1.2' as decimal(3,2))
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1.20
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select 1e18 * cast('1.2' as decimal(3,2));
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1e18 * cast('1.2' as decimal(3,2))
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1.2e18
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select cast(cast('1.2' as decimal(3,2)) as signed);
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cast(cast('1.2' as decimal(3,2)) as signed)
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1
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set @v1=1e18;
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select cast(@v1 as decimal(22, 2));
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cast(@v1 as decimal(22, 2))
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1000000000000000000.00
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select cast(-1e18 as decimal(22,2));
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cast(-1e18 as decimal(22,2))
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-1000000000000000000.00
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create table t1(s1 time);
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insert into t1 values ('11:11:11');
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select cast(s1 as decimal(7,2)) from t1;
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cast(s1 as decimal(7,2))
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99999.99
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Warnings:
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Warning 1264 Out of range value for column 'cast(s1 as decimal(7,2))' at row 1
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drop table t1;
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CREATE TABLE t1 (v varchar(10), tt tinytext, t text,
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mt mediumtext, lt longtext);
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INSERT INTO t1 VALUES ('1.01', '2.02', '3.03', '4.04', '5.05');
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SELECT CAST(v AS DECIMAL), CAST(tt AS DECIMAL), CAST(t AS DECIMAL),
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CAST(mt AS DECIMAL), CAST(lt AS DECIMAL) from t1;
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CAST(v AS DECIMAL) CAST(tt AS DECIMAL) CAST(t AS DECIMAL) CAST(mt AS DECIMAL) CAST(lt AS DECIMAL)
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1 2 3 4 5
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DROP TABLE t1;
|
||
select cast(NULL as decimal(6)) as t1;
|
||
t1
|
||
NULL
|
||
set names latin1;
|
||
select hex(cast('a' as char(2) binary));
|
||
hex(cast('a' as char(2) binary))
|
||
61
|
||
select hex(cast('a' as binary(2)));
|
||
hex(cast('a' as binary(2)))
|
||
6100
|
||
select hex(cast('a' as char(2) binary));
|
||
hex(cast('a' as char(2) binary))
|
||
61
|
||
CREATE TABLE t1 (d1 datetime);
|
||
INSERT INTO t1(d1) VALUES ('2007-07-19 08:30:00'), (NULL),
|
||
('2007-07-19 08:34:00'), (NULL), ('2007-07-19 08:36:00');
|
||
SELECT cast(date(d1) as signed) FROM t1;
|
||
cast(date(d1) as signed)
|
||
20070719
|
||
NULL
|
||
20070719
|
||
NULL
|
||
20070719
|
||
drop table t1;
|
||
CREATE TABLE t1 (f1 DATE);
|
||
INSERT INTO t1 VALUES ('2007-07-19'), (NULL);
|
||
SELECT HOUR(f1),
|
||
MINUTE(f1),
|
||
SECOND(f1) FROM t1;
|
||
HOUR(f1) MINUTE(f1) SECOND(f1)
|
||
0 0 0
|
||
NULL NULL NULL
|
||
SELECT HOUR(CAST('2007-07-19' AS DATE)),
|
||
MINUTE(CAST('2007-07-19' AS DATE)),
|
||
SECOND(CAST('2007-07-19' AS DATE));
|
||
HOUR(CAST('2007-07-19' AS DATE)) MINUTE(CAST('2007-07-19' AS DATE)) SECOND(CAST('2007-07-19' AS DATE))
|
||
0 0 0
|
||
SELECT HOUR(CAST(NULL AS DATE)),
|
||
MINUTE(CAST(NULL AS DATE)),
|
||
SECOND(CAST(NULL AS DATE));
|
||
HOUR(CAST(NULL AS DATE)) MINUTE(CAST(NULL AS DATE)) SECOND(CAST(NULL AS DATE))
|
||
NULL NULL NULL
|
||
SELECT HOUR(NULL),
|
||
MINUTE(NULL),
|
||
SECOND(NULL);
|
||
HOUR(NULL) MINUTE(NULL) SECOND(NULL)
|
||
NULL NULL NULL
|
||
DROP TABLE t1;
|
||
End of 5.0 tests
|
||
#
|
||
# Bug #44766: valgrind error when using convert() in a subquery
|
||
#
|
||
CREATE TABLE t1(a tinyint);
|
||
INSERT INTO t1 VALUES (127);
|
||
SELECT 1 FROM
|
||
(
|
||
SELECT CONVERT(t2.a USING UTF8) FROM t1, t1 t2 LIMIT 1
|
||
) AS s LIMIT 1;
|
||
1
|
||
1
|
||
DROP TABLE t1;
|
||
End of 5.1 tests
|