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

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

View File

@ -449,7 +449,8 @@ ALTER TABLE proc MODIFY name char(64) DEFAULT '' NOT NULL,
'HIGH_NOT_PRECEDENCE',
'NO_ENGINE_SUBSTITUTION',
'PAD_CHAR_TO_FULL_LENGTH',
'EMPTY_STRING_IS_NULL'
'EMPTY_STRING_IS_NULL',
'SIMULTANEOUS_ASSIGNMENT'
) DEFAULT '' NOT NULL,
DEFAULT CHARACTER SET utf8;
@ -578,7 +579,8 @@ ALTER TABLE event MODIFY sql_mode
'HIGH_NOT_PRECEDENCE',
'NO_ENGINE_SUBSTITUTION',
'PAD_CHAR_TO_FULL_LENGTH',
'EMPTY_STRING_IS_NULL'
'EMPTY_STRING_IS_NULL',
'SIMULTANEOUS_ASSIGNMENT'
) DEFAULT '' NOT NULL AFTER on_completion;
ALTER TABLE event MODIFY name char(64) CHARACTER SET utf8 NOT NULL default '';