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Quick-and-dirty fix for recursive plpgsql functions, per bug report from

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Frank Miles 7-Sep-01.  This is really just sticking a finger in the dike.
Frank's case works now, but we still couldn't support a recursive function
returning a set.  Really need to restructure querytrees and execution
state so that the querytree is *read only*.  We've run into this over and
over and over again ... it has to happen sometime soon.
This commit is contained in:
Tom Lane
2001-09-21 00:11:31 +00:00
parent ac0c234c16
commit ae3129fd03
5 changed files with 123 additions and 92 deletions
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19
src/test/regress/expected/plpgsql.out
View File

@ -1515,3 +1515,22 @@ insert into IFace values ('IF', 'notthere', 'eth0', '');
ERROR: system "notthere" does not exist
insert into IFace values ('IF', 'orion', 'ethernet_interface_name_too_long', '');
ERROR: IFace slotname "IF.orion.ethernet_interface_name_too_long" too long (20 char max)
--
-- Test recursion, per bug report 7-Sep-01
--
CREATE FUNCTION recursion_test(int,int) RETURNS text AS '
DECLARE rslt text;
BEGIN
IF $1 <= 0 THEN
rslt = CAST($2 AS TEXT);
ELSE
rslt = CAST($1 AS TEXT) || '','' || recursion_test($1 - 1, $2);
END IF;
RETURN rslt;
END;' LANGUAGE 'plpgsql';
SELECT recursion_test(4,3);
recursion_test
----------------
4,3,2,1,3
(1 row)

15
src/test/regress/sql/plpgsql.sql
View File

@ -1399,3 +1399,18 @@ delete from HSlot;
insert into IFace values ('IF', 'notthere', 'eth0', '');
insert into IFace values ('IF', 'orion', 'ethernet_interface_name_too_long', '');
--
-- Test recursion, per bug report 7-Sep-01
--
CREATE FUNCTION recursion_test(int,int) RETURNS text AS '
DECLARE rslt text;
BEGIN
IF $1 <= 0 THEN
rslt = CAST($2 AS TEXT);
ELSE
rslt = CAST($1 AS TEXT) || '','' || recursion_test($1 - 1, $2);
END IF;
RETURN rslt;
END;' LANGUAGE 'plpgsql';
SELECT recursion_test(4,3);