Peter Eisentraut d60f10b0e7 Add optional "validator" function to languages that can validate the ...

function body (and other properties) as a function in the language
is created.  This generalizes ad hoc code that already existed for
the built-in languages.

The validation now happens after the pg_proc tuple of the new function
is created, so it is possible to define recursive SQL functions.

Add some regression test cases that cover bogus function definition
attempts.

2002-05-22 17:21:02 +00:00

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