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Attached is an update to contrib/tablefunc. It introduces a new

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function, connectby(), which can serve as a reference implementation for

the changes made in the last few days -- namely the ability of a
function to return an entire tuplestore, and the ability of a function
to make use of the query provided "expected" tuple description.

Description:

   connectby(text relname, text keyid_fld, text parent_keyid_fld,
     text start_with, int max_depth [, text branch_delim])
   - returns keyid, parent_keyid, level, and an optional branch string
   - requires anonymous composite type syntax in the FROM clause. See
     the instructions in the documentation below.

Joe Conway
This commit is contained in:
Bruce Momjian
2002-09-02 05:44:05 +00:00
parent 9fd842c4b2
commit 6aa4482f2f
5 changed files with 602 additions and 12 deletions
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10
contrib/tablefunc/tablefunc.sql.in
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@@ -37,4 +37,12 @@ CREATE OR REPLACE FUNCTION crosstab4(text)
CREATE OR REPLACE FUNCTION crosstab(text,int)
RETURNS setof record
AS 'MODULE_PATHNAME','crosstab' LANGUAGE 'c' STABLE STRICT;
AS 'MODULE_PATHNAME','crosstab' LANGUAGE 'c' STABLE STRICT;
CREATE OR REPLACE FUNCTION connectby(text,text,text,text,int,text)
RETURNS setof record
AS 'MODULE_PATHNAME','connectby_text' LANGUAGE 'c' STABLE STRICT;
CREATE OR REPLACE FUNCTION connectby(text,text,text,text,int)
RETURNS setof record
AS 'MODULE_PATHNAME','connectby_text' LANGUAGE 'c' STABLE STRICT;