Andreas 'ads' Scherbaum wrote:
The attached patch for HEAD extends the CREATE LANGUAGE statement by an
IF NOT EXISTS option which in effect changes the raised error into a

Before i continue working on this patch i would like to know if this
extension has a chance to go into PG and what other changes i should
apply (beside the missing documentation).

The way we've solved this problem for other CREATE commands is to add "OR REPLACE" option, instead of "IF NOT EXISTS". We should do the same here.

Regarding the patch itself: You define rule "opt_if_not_exists", but never use it. And you add a new rule for "CREATE LANGUAGE ... HANDLER ...", but forgot "IF_P NOT EXISTS" from the end of that. Looks like you couldn't decide which approach to take, and ended up doing a little bit of both ;-).

  Heikki Linnakangas

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