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Various places assume that pg_do_encoding_conversion() and pg_server_to_any() will ensure encoding validity of their results; but they failed to do so in the case that the source encoding is SQL_ASCII while the destination is not. We cannot perform any actual "conversion" in that scenario, but we should still validate the string according to the destination encoding. Per bug #9210 from Digoal Zhou. Arguably this is a back-patchable bug fix, but on the other hand adding more enforcing of encoding checks might break existing applications that were being sloppy. On balance there doesn't seem to be much enthusiasm for a back-patch, so fix in HEAD only. While at it, remove some apparently-no-longer-needed provisions for letting pg_do_encoding_conversion() "work" outside a transaction --- if you consider it "working" to silently fail to do the requested conversion. Also, make a few cosmetic improvements in mbutils.c, notably removing some Asserts that are certainly dead code since the variables they assert aren't null are never null, even at process start. (I think this wasn't true at one time, but it is now.) |
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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/.