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Support INOUT arguments in procedures

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In a top-level CALL, the values of INOUT arguments will be returned as a
result row.  In PL/pgSQL, the values are assigned back to the input
arguments.  In other languages, the same convention as for return a
record from a function is used.  That does not require any code changes
in the PL implementations.

Reviewed-by: Pavel Stehule <pavel.stehule@gmail.com>
This commit is contained in:
Peter Eisentraut
2018-03-14 11:47:21 -04:00
parent 484a4a08ab
commit 33803f67f1
32 changed files with 792 additions and 50 deletions
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20
src/pl/plpython/sql/plpython_call.sql
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@@ -34,6 +34,26 @@ CALL test_proc3(55);
SELECT * FROM test1;
-- output arguments
CREATE PROCEDURE test_proc5(INOUT a text)
LANGUAGE plpythonu
AS $$
return [a + '+' + a]
$$;
CALL test_proc5('abc');
CREATE PROCEDURE test_proc6(a int, INOUT b int, INOUT c int)
LANGUAGE plpythonu
AS $$
return (b * a, c * a)
$$;
CALL test_proc6(2, 3, 4);
DROP PROCEDURE test_proc1;
DROP PROCEDURE test_proc2;
DROP PROCEDURE test_proc3;