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Built-in casts for ltree

From: "Jim C(dot) Nasby" <decibel(at)decibel(dot)org>
To: pgsql-hackers(at)postgresql(dot)org
Subject: Built-in casts for ltree
Date: 2005-01-25 05:03:03
Message-ID: 20050125050303.GY67721@decibel.org (view raw or flat)
Thread:
Lists: pgsql-hackers
contrib/ltree includes text2ltree and ltree2text functions, but no
implicit casts. Is there any particular reason for this?

--- ltree.sql.in.orig   Mon Jan 24 22:47:01 2005
+++ ltree.sql.in        Mon Jan 24 22:58:40 2005
@@ -155,10 +155,14 @@
 AS 'MODULE_PATHNAME'
 LANGUAGE 'C' WITH (isstrict,iscachable);
 
+CREATE CAST (ltree AS text) WITH FUNCTION ltree2text(ltree) AS IMPLICIT;
+
 CREATE FUNCTION text2ltree(text)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE 'C' WITH (isstrict,iscachable);
+
+CREATE CAST (text AS ltree) WITH FUNCTION text2ltree(text) AS IMPLICIT;
 
 CREATE FUNCTION lca(_ltree)
 RETURNS ltree
-- 
Jim C. Nasby, Database Consultant               decibel(at)decibel(dot)org 
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