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MDEV-13417 UPDATE produces wrong values if an updated column is later used as an update source

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Standard compatible behavior for UPDATE: all assignments in SET
are executed "simultaneously", not left-to-right. And `SET a=b,b=a`
will swap the values.
This commit is contained in:
Jerome Brauge
2018-01-29 16:53:39 +01:00
committed by Sergei Golubchik
parent 355ee6877b
commit d943d7f712
29 changed files with 566 additions and 76 deletions
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2
mysql-test/suite/compat/oracle/r/empty_string_literal.result
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@ -11,7 +11,7 @@ SET SESSION character_set_client=cp1250;
SET sql_mode=@mode;
select @@sql_mode;
@@sql_mode
PIPES_AS_CONCAT,ANSI_QUOTES,IGNORE_SPACE,ORACLE,NO_KEY_OPTIONS,NO_TABLE_OPTIONS,NO_FIELD_OPTIONS,NO_AUTO_CREATE_USER,EMPTY_STRING_IS_NULL
PIPES_AS_CONCAT,ANSI_QUOTES,IGNORE_SPACE,ORACLE,NO_KEY_OPTIONS,NO_TABLE_OPTIONS,NO_FIELD_OPTIONS,NO_AUTO_CREATE_USER,EMPTY_STRING_IS_NULL,SIMULTANEOUS_ASSIGNMENT
SELECT '',CHARSET(''), null, CHARSET(null), CAST(null as char(10)), CHARSET(CAST(null as char(10))), 'x', CHARSET('x');
NULL CHARSET('') NULL CHARSET(null) CAST(null as char(10)) CHARSET(CAST(null as char(10))) x CHARSET('x')
NULL latin2 NULL binary NULL latin2 x latin2