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The initial implementation of this feature was really unsupportable, because it's relying on the physical size of an on-disk file to carry the relation's populated/unpopulated state, which is at least a modularity violation and could have serious long-term consequences. We could say that an unlogged matview goes to empty on crash, but not everybody likes that definition, so let's just remove the feature for 9.3. We can add it back when we have a less klugy implementation. I left the grammar and tab-completion support for CREATE UNLOGGED MATERIALIZED VIEW in place, since it's harmless and allows delivering a more specific error message about the unsupported feature. I'm committing this separately to ease identification of what should be reverted when/if we are able to re-enable the feature. |
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README.git |
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/.