Andrew Dunstan
6d12b68cd7
Allow IF NOT EXISTS when add a new enum label.
...
If the label is already in the enum the statement becomes a no-op.
This will reduce the pain that comes from our not allowing this
operation inside a transaction block.
Andrew Dunstan, reviewed by Tom Lane and Magnus Hagander.
2012-09-22 12:53:31 -04:00
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