2f4c9d39fe
subqueries. It passes the normal 'runcheck' tests, and I've tried a few simple things like select 1 as foo union (((((select 2))))) order by foo; There are a few things that it doesn't do that have been talked about here at least a little: 1) It doesn't allow things like "IN(((select 1)))" -- the select here has to be at the top level. This is not new. 2) It does NOT preserve the odd syntax I found when I started looking at this, where a SELECT statement could begin with parentheses. Thus, (SELECT a from foo) order by a; fails. I have preserved the ability, used in the regression tests, to have a single select statement in what appears to be a RuleActionMulti (but wasn't -- the parens were part of select_clause syntax). In my version, this is a special form. This may cause some discussion: I have differentiated the two kinds of RuleActionMulti. Perhaps nobody knew there were two kinds, because I don't think the second form appears in the regression tests. This one uses square brackets instead of parentheses, but originally was otherwise the same as the one in parentheses. In this version of gram.y, the square bracket form treats SELECT statements the same as the other allowed statements. As discussed before on this list, psql cannot make sense out of the results of such a thing, but an application might. And I have designs on just such an application. ++ kevin o'gorman
PostgreSQL Data Base Management System (formerly known as Postgres, then as Postgres95). This directory contains the development version of 7.1 of the PostgreSQL database server. The server is not ANSI SQL compliant, but it gets closer with every release. After you unzip and untar the distribution file, look at file INSTALL for the installation notes and file HISTORY for the changes. The latest version of this software may be obtained at ftp://ftp.postgresql.org/pub/. For more information look at our WWW home page located at http://www.postgreSQL.org/. PostgreSQL is not public domain software. It is copyrighted by the University of California but may be used according to the licensing terms of the the copyright below: ------------------------------------------------------------------------ POSTGRES95 Data Base Management System (formerly known as Postgres, then as Postgres95). Copyright (c) 1994-7 Regents of the University of California Permission to use, copy, modify, and distribute this software and its documentation for any purpose, without fee, and without a written agreement is hereby granted, provided that the above copyright notice and this paragraph and the following two paragraphs appear in all copies. IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.