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when a plpython function returns unicode" thread: http://archives.postgresql.org/pgsql-bugs/2005-06/msg00105.php In several places PL/Python was calling PyObject_Str() and then PyString_AsString() without checking if the former had returned NULL to indicate an error. PyString_AsString() doesn't expect a NULL argument, so passing one causes a segmentation fault. This patch adds checks for NULL and raises errors via PLy_elog(), which prints details of the underlying Python exception. The patch also adds regression tests for these checks. All tests pass on my Solaris 9 box running HEAD and Python 2.4.1. In one place the patch doesn't call PLy_elog() because that could cause infinite recursion; see the comment I added. I'm not sure how to test that particular case or whether it's even possible to get an error there: the value that the code should check is the Python exception type, so I wonder if a NULL value "shouldn't happen." This patch converts NULL to "Unknown Exception" but I wonder if an Assert() would be appropriate. The patch is against HEAD but the same changes should be applied to earlier versions because they have the same problem. The patch might not apply cleanly against earlier versions -- will the committer take care of little differences or should I submit different versions of the patch? Michael Fuhr |
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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. The JDBC, ODBC, C++, Python, and Tcl interfaces have been moved to the PostgreSQL Projects Web Site at http://gborg.postgresql.org for separate maintenance. A Perl DBI/DBD driver is available from CPAN. 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 ftp://ftp.postgresql.org/pub/. For more information look at our web site located at http://www.postgresql.org/.