Update DELETE FROM:

< * Allow DELETE to handle table aliases for self-joins
> * Allow an alias to be provided for the target table in UPDATE/DELETE
276,279c276,282
<   There is no way to create a table alias for the deleted table for use
<   in the DELETE WHERE clause.  The agreed approach is to allow a USING
<   clause to specify additional tables.  UPDATE already has an optional
<   FROM clause for this purpose.
>   This is not SQL-spec but many DBMSs allow it.
>
> * Allow additional tables to be specified in DELETE for joins
>
>   UPDATE already allows this (UPDATE...FROM) but we need similar
>   functionality in DELETE.  It's been agreed that the keyword should
>   be USING, to avoid anything as confusing as DELETE FROM a FROM b.

diff --git a/doc/TODO b/doc/TODO
index 1c29f9cb156b30b74f3e5760597ca12be80f2305..daf84ba00ef7d89b5ec5f0959b7e4c8cbcd7e5f4 100644 (file)
--- a/doc/TODO
+++ b/doc/TODO
@@ -5,7 +5,7 @@ TODO list for PostgreSQL
 Bracketed items "[]" have more detail.
 
 Current maintainer:    Bruce Momjian (pgman@candle.pha.pa.us)
-Last updated:          Tue Aug 10 11:00:16 EDT 2004
+Last updated:          Tue Aug 10 13:30:30 EDT 2004
 
 The most recent version of this document can be viewed at the PostgreSQL web site, http://www.PostgreSQL.org.
 
@@ -271,12 +271,15 @@ Commands
   The use of C-style backslashes (.e.g. \n, \r) in quoted strings is not
   SQL-spec compliant, so allow such handling to be disabled.
 
-* Allow DELETE to handle table aliases for self-joins
+* Allow an alias to be provided for the target table in UPDATE/DELETE
 
-  There is no way to create a table alias for the deleted table for use
-  in the DELETE WHERE clause.  The agreed approach is to allow a USING 
-  clause to specify additional tables.  UPDATE already has an optional 
-  FROM clause for this purpose.
+  This is not SQL-spec but many DBMSs allow it.
+
+* Allow additional tables to be specified in DELETE for joins
+
+  UPDATE already allows this (UPDATE...FROM) but we need similar
+  functionality in DELETE.  It's been agreed that the keyword should 
+  be USING, to avoid anything as confusing as DELETE FROM a FROM b.
 
 * Add CORRESPONDING BY to UNION/INTERSECT/EXCEPT
 * Allow REINDEX to rebuild all database indexes, remove /contrib/reindex