"Merlin Moncure" <mmoncure@gmail.com> writes:
> I'm curious what's considered the best way to invoke PG_GETARG_BYTEA_P
> in an SPI routine and properly check for null input in non 'strict'
> routines. Right now, I'm looking at PG_GETARG_POINTER to check for
> null value before using PG_GETARG_BYTEA_P to assign to the bytea
> pointer.

That would be entirely wrong. In a non-strict function, test
PG_ARGISNULL(n) before attempting any variant of PG_GETARG(n).
Grepping for PG_ARGISNULL will yield lots of examples.

regards, tom lane

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