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WL#13325: Deprecate VALUES syntax in INSERT ... ON DUPLICATE KEY UPDATE
VALUES can be called as a function from the ON DUPLICATE KEY UPDATE clause of an INSERT statement and be used to get a value from the INSERT portion of the statement. This use of VALUES is now deprecated. Statements that use VALUES in this way, should be rewritten from this form: INSERT INTO t1(id, x) VALUES (1, 2) ON DUPLICATE KEY UPDATE x = x + VALUES(x); To this form: INSERT INTO t1(id, x) VALUES (1, 2) AS t2 ON DUPLICATE KEY UPDATE x = t1.x + t2.x; VALUES can also be called as a function in other contexts where function calls are allowed, outside of ON DUPLICATE KEY UPDATE clauses. Such calls always return NULL. This use of VALUES is also deprecated. Change-Id: Iddaa706910075a35ad7c65d0cbb9f982e51b322a
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