[SQL] postgres subfunction return error
greetings. I'm trying to write a function that acts like a switchboard, calling other functions depending on incoming parameters. I'm getting error: query has no destination for result data Please advise what we're doing wrong. The subfunctions return a series of refcursors in a single table and single row (see pr_test_subfunction). When i run the parent function, i want to see the same results as if i had run the subfunction - the results of the subfunction should pass-thru to the parent calling function. Can this be done? Subfunction: [CODE] CREATE OR REPLACE FUNCTION dev.pr_test_subfunction ( v_action varchar, out swv_refcur refcursor, out swv_refcur2 refcursor, out swv_refcur3 refcursor, out swv_refcur4 refcursor, out swv_refcur5 refcursor ) RETURNS record AS $body$ DECLARE SWV_Action VARCHAR(50) DEFAULT Coalesce(v_Action,''); BEGIN OPEN SWV_RefCur for SELECT 1; OPEN swv_refcur2 for SELECT 2; OPEN swv_refcur3 for SELECT 3; OPEN swv_refcur4 for SELECT 4; OPEN swv_refcur5 for SELECT 5; RETURN; END; $body$ LANGUAGE 'plpgsql' VOLATILE CALLED ON NULL INPUT SECURITY INVOKER COST 100; [/CODE] Parent Function: [CODE] CREATE OR REPLACE FUNCTION dev.pr_test_parentfunction ( v_action varchar, out swv_refcur refcursor, out swv_refcur2 refcursor, out swv_refcur3 refcursor, out swv_refcur4 refcursor, out swv_refcur5 refcursor ) RETURNS record AS $body$ DECLARE SWV_Action VARCHAR(50) DEFAULT Coalesce(v_Action,'1'); BEGIN IF SWV_Action = '1' THEN SELECT * FROM dev.pr_test_subfunction(SWV_Action); ELSIF SWV_Action = '2' THEN SELECT * FROM dev.pr_test_subfunction(SWV_Action); ELSE OPEN SWV_RefCur for SELECT 1; OPEN swv_refcur2 for SELECT 2; END IF; RETURN; END; $body$ LANGUAGE 'plpgsql' VOLATILE CALLED ON NULL INPUT SECURITY INVOKER COST 100; [/CODE] -- View this message in context: http://postgresql.1045698.n5.nabble.com/postgres-subfunction-return-error-tp5772407.html Sent from the PostgreSQL - sql mailing list archive at Nabble.com. -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
Re: [SQL] postgres subfunction return error
Thank you! What kind of variable would I declare? Is this any form of right? No change to subfunction. In PARENT Function: DECLARE v_outvar1 REFCURSOR; v_outvar2 REFCURSOR; v_outvar3 REFCURSOR; ?And use: SELECT * INTO v_outvar1, v_outvar2, v_outvar3 FROM dev.pr_test_subfunction(SWV_Action); OPEN swv_refcurfor SELECT v_outvar1; OPEN swv_refcur2 for SELECT v_outvar2; OPEN swv_refcur3 for SELECT v_outvar3; From: David Johnston [via PostgreSQL] [mailto:ml-node+s1045698n577240...@n5.nabble.com] Sent: Wednesday, September 25, 2013 7:19 PM To: jonathansfl Subject: Re: postgres subfunction return error jonathansfl wrote greetings. I'm trying to write a function that acts like a switchboard, calling other functions depending on incoming parameters. I'm getting error: query has no destination for result data SELECT * FROM dev.pr_test_subfunction(SWV_Action); In pl/pgsql if you do not use an "INTO" clause on a select statement you must replace the "SELECT" with "PERFORM". Failing to do so results in the error you are seeing. In this case your calls to the sub-function do not magically populate the parent function variables. You must manually map the output of the sub-function call query onto the parent variables. David J. _ If you reply to this email, your message will be added to the discussion below: http://postgresql.1045698.n5.nabble.com/postgres-subfunction-return-error-tp 5772407p5772408.html To unsubscribe from postgres subfunction return error, click here <http://postgresql.1045698.n5.nabble.com/template/NamlServlet.jtp?macro=unsu bscribe_by_code&node=5772407&code=am9uYXRoYW5icmlua21hbkB5YWhvby5jb218NTc3Mj QwN3wtNDQ0Mzc4MjI4> . <http://postgresql.1045698.n5.nabble.com/template/NamlServlet.jtp?macro=macr o_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.B asicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.templ ate.NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-insta nt_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml> NAML -- View this message in context: http://postgresql.1045698.n5.nabble.com/postgres-subfunction-return-error-tp5772407p5772409.html Sent from the PostgreSQL - sql mailing list archive at Nabble.com.
Re: [SQL] postgres subfunction return error
I'm trying to pass a REFCURSOR variable from a subfunction to its parent calling function, who will then pass it to the user (for parsing). thanks to David J I fixed it somewhat, but the user now receives the TEXT of (etc.) instead of the actual data in that REFCURSOR variable. I think the problem is with the "OPEN swv_refcur for SELECT v_outvar;" which is not returning the REFCURSOR's actual data. thank you for your help!! Jonathan NEW PARENT FUNCTION CODE: [CODE] CREATE OR REPLACE FUNCTION custom.pr_test_parentfunction ( v_action varchar, out swv_refcur refcursor, out swv_refcur2 refcursor, out swv_refcur3 refcursor ) RETURNS record AS $body$ DECLARE SWV_Action VARCHAR(50) DEFAULT Coalesce(v_Action,'1'); v_outvar1 REFCURSOR; v_outvar2 REFCURSOR; v_outvar3 REFCURSOR; BEGIN SELECT * INTO v_outvar1, v_outvar2, v_outvar3 FROM custom.pr_test_subfunction(SWV_Action); OPEN swv_refcur for SELECT v_outvar1; OPEN swv_refcur2 for SELECT v_outvar2; OPEN swv_refcur3 for SELECT v_outvar3; RETURN; END; $body$ LANGUAGE 'plpgsql' VOLATILE CALLED ON NULL INPUT SECURITY INVOKER COST 100; [/CODE] -- View this message in context: http://postgresql.1045698.n5.nabble.com/postgres-subfunction-return-error-tp5772407p5772613.html Sent from the PostgreSQL - sql mailing list archive at Nabble.com. -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
Re: [SQL] postgres subfunction return error
Hurray, that works! Many thanks David CREATE OR REPLACE FUNCTION custom.pr_test_parentfunction ( v_action varchar, out swv_refcur refcursor, out swv_refcur2 refcursor, out swv_refcur3 refcursor ) RETURNS record AS $body$ DECLARE SWV_Action VARCHAR(50) DEFAULT Coalesce(v_Action,'1'); v_outvar1 REFCURSOR; v_outvar2 REFCURSOR; v_outvar3 REFCURSOR; BEGIN SELECT * INTO v_outvar1, v_outvar2, v_outvar3 FROM custom.pr_test_subfunction(SWV_Action); swv_refcur = v_outvar1; swv_refcur2 = v_outvar2; swv_refcur3 = v_outvar3; RETURN; END; $body$ LANGUAGE 'plpgsql' VOLATILE CALLED ON NULL INPUT SECURITY INVOKER COST 100; From: David Johnston [via PostgreSQL] [mailto:ml-node+s1045698n5772627...@n5.nabble.com] Sent: Friday, September 27, 2013 1:43 PM To: jonathansfl Subject: Re: postgres subfunction return error jonathansfl wrote SELECT * INTO v_outvar1, v_outvar2, v_outvar3 FROM custom.pr_test_subfunction(SWV_Action); OPEN swv_refcur for SELECT v_outvar1; OPEN swv_refcur2 for SELECT v_outvar2; OPEN swv_refcur3 for SELECT v_outvar3; RETURN; I've never used cursors in this way so my help is more theory but: The called-function already created the cursors. In the parent function you should simply be able to pass them through unaltered: SELECT * INTO v_outvar1, ...; swv_refcur := v_outvar1; ... ... RETURN; You can possible simply the above and toss the temporary variables but that should not impact the semantics. David J. _ If you reply to this email, your message will be added to the discussion below: http://postgresql.1045698.n5.nabble.com/postgres-subfunction-return-error-tp 5772407p5772627.html To unsubscribe from postgres subfunction return error, click here <http://postgresql.1045698.n5.nabble.com/template/NamlServlet.jtp?macro=unsu bscribe_by_code&node=5772407&code=am9uYXRoYW5icmlua21hbkB5YWhvby5jb218NTc3Mj QwN3wtNDQ0Mzc4MjI4> . <http://postgresql.1045698.n5.nabble.com/template/NamlServlet.jtp?macro=macr o_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.B asicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.templ ate.NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-insta nt_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml> NAML -- View this message in context: http://postgresql.1045698.n5.nabble.com/postgres-subfunction-return-error-tp5772407p5772658.html Sent from the PostgreSQL - sql mailing list archive at Nabble.com.
