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Subject DROP CONSTRAINT IF EXISTS
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Msg-id 3DFFB0670A395946974CE996C72073241C496AB2@NDHMC4SXCH.gdc4s.com
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Responses Re: DROP CONSTRAINT IF EXISTS  (Tom Lane <tgl@sss.pgh.pa.us>)
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The sql statement  'ALTER TABLE <table name> DROP CONSTRAINT IF EXISTS
<constraint-name>' returns with a syntax error on exists.  The
documentation states that the IF EXISTS clause is allowed in DROP
CONSTRAINT statements.

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