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Prior to 9.0, pg_dump handled comments on large objects by dumping a bunch of COMMENT commands into a single BLOB COMMENTS archive object. With sufficiently many such comments, some of the commands would likely get split across bufferloads when restoring, causing failures in direct-to-database restores (though no problem would be evident in text output). This is the same type of issue we have with table data dumped as INSERT commands, and it can be fixed in the same way, by using a mini SQL lexer to figure out where the command boundaries are. Fortunately, the COMMENT commands are no more complex to lex than INSERTs, so we can just re-use the existing lexer for INSERTs. Per bug #10611 from Jacek Zalewski. Back-patch to all active branches. |
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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. 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/.