Pavel Stehule wrote: >> This doesn't work: >> >> create function exc_using(varchar) returns varchar >> as $$ >> declare v varchar; >> begin >> execute 'select upper($1)' into v using ('aa'); > > it cannot work. Your parameter is row.
Really? "execute 'select upper($1)' into v using ('aa'::varchar);" works, as does "execute 'select $1 + 1' into v using (12345);". > But into v using 'aaa' doesn't work too :( > > ERROR: failed to find conversion function from unknown to text > CONTEXT: SQL statement "select upper($1)" > > you have to specify type: use argument, variable or casting > .... using text 'aaa'; or select upper($1::text) > > It is question for Tom. Why prepared statement cannot cast from literal to > text > http://www.nabble.com/Blowback-from-text-conversion-changes-t3977711.html Yeah, I suppose we'll just live with that. Using literals as arguments is kind of pointless anyway, since you could as well put the literal in the query as well and not bother with the USING. >> I also noted that the patch makes USING a keyword. Not sure if we care >> about that or not. >> > I am afraid to change well know syntax (SQL/PSM use it in same context too). No I think the syntax is fine. I'm just wondering if it really has to be a reserved keyword to implement that syntax. Looking at the plpgsql grammar close, we don't categorize keywords like we do in the main grammar, so maybe what I'm saying doesn't make any sense. -- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com ---------------------------(end of broadcast)--------------------------- TIP 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq