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Code review for commit 090010f2e. Fix cases where an elog(ERROR) partway through a function would leave the persistent data structures in a corrupt state. pgstat_report_stat got this wrong by invalidating PgStat_TableEntry structs before removing hashtable entries pointing to them, and get_tabstat_entry got it wrong by ignoring the possibility of palloc failure after it had already created a hashtable entry. Also, avoid leaking a memory context per transaction, which the previous code did through misunderstanding hash_create's API. We do not need to create a context to hold the hash table; hash_create will do that. (The leak wasn't that large, amounting to only a memory context header per iteration, but it's still surprising that nobody noticed it yet.)
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/.