03cd7571e8
by my patch of 2007-01-28 to use per-subtransaction ExprContexts/EStates: since we re-prepared any expression tree when the current subtransaction ID changed, we'd accumulate more and more leaked expression state trees in the outermost subtransaction if the same function was executed at multiple levels of subtransaction nesting. To fix, go back to the previous scheme where there was only one EState per transaction for simple plpgsql expressions. We really only need an ExprContext per subtransaction, not a whole EState, so it's possible to keep prepared expression state trees in the one EState throughout the transaction. This should be more efficient as well as not leaking memory for cases involving lots of subtransactions. The added regression test is the case that inspired the 2007-01-28 patch in the first place, just to make sure we didn't go backwards. The current memory leak complaint is unfortunately hard to test for in the regression test framework, though manual testing shows it's fixed. Although this is a pre-existing bug, I'm not back-patching because I'd like to see this method get some field testing first. Consider back-patching if it gets through 8.4beta unscathed. |
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| contrib | ||
| doc | ||
| src | ||
| COPYRIGHT | ||
| GNUmakefile.in | ||
| Makefile | ||
| README | ||
| README.CVS | ||
| aclocal.m4 | ||
| configure | ||
| configure.in | ||
README
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/.