Hi,
I have a UDF (written in C) that returns SETOF RECORD of an anonymous record type
(defined via OUT parameters). I'm trying to use array_agg() to transform its output to
an array:
pg_dev=# SELECT array_agg((my_setof_record_returning_func()).col1);
ERROR: set-valued function called in context that cannot accept a set
pg_dev=# SELECT array_agg(col1(my_setof_record_returning_func()));
ERROR: set-valued function called in context that cannot accept a set
Can somebody explain why I get the error message? Presumably the parser is deciding that
the expression provided to array_agg() is a set, based on my_setof_record_returning_func()'s
definition. But shouldn't the column selection (or equivalent column-as-func-call notation) supply
the expected context to array_agg()?
Thanks.
