On Friday, April 17, 2015, Jim Nasby <jim.na...@bluetreble.com> wrote:
> I'm working on a function that will return a set of test data, for unit > testing database stuff. It does a few things, but ultimately returns SETOF > record that's essentially: > > RETURN QUERY EXECUTE 'SELECT * FROM ' || table_name; > > Because it's always going to return a real relation, I'd like to be able > to the equivalent of: > > SELECT ... FROM my_function( 'some_table' )::some_table; Unfortunately this means "cast the existing type to some_table" and "record" is not a valid type in this context. > > Is there any trick that would allow that to work? I know that instead of > 'SELECT * ...' I can do 'SELECT row(t.*) FROM ' || table_name || ' AS t' > and then do > > SELECT ... FROM my_function( 'some_table' ) AS data( d some_table ) > > but I'm hoping to avoid the extra level of indirection. > > Haven't explored this specific code in depth...but which part - the function alias or the select row(t.*)? They seem to be independent concerns. David J.
