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Per bug #5988, reported by Marko Tiikkaja, and further analyzed by Tom Lane, the previous coding was broken in several respects: even if the target table already existed, a subsequent CREATE TABLE IF NOT EXISTS might try to add additional constraints or sequences-for-serial specified in the new CREATE TABLE statement. In passing, this also fixes a minor information leak: it's no longer possible to figure out whether a schema to which you don't have CREATE access contains a sequence named like "x_y_seq" by attempting to create a table in that schema called "x" with a serial column called "y". Some more refactoring of this code in the future might be warranted, but that will need to wait for a later major release. |
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PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: http://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Changes between all PostgreSQL releases are recorded in the file HISTORY. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.