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e48433e9f8
convert_tuples_by_position was rejecting attempts to coerce a record field with -1 typmod to the same type with a non-default typmod. This is in fact the "correct" thing to do (since we're just going to do a type relabeling, not invoke any length-conversion cast function); but it results in rejecting valid cases like bug #6020, because the source record's tupdesc is built from Params that don't have typmod assigned. Since that's a regression from previous versions, which accepted this code, we have to do something about it. In HEAD, I've fixed the problem properly by causing the Params to receive the correct typmods; but the potential for incidental behavioral changes seems high enough to make it unattractive to make the same change in released branches. (And it couldn't be fixed that way in 8.4 anyway...) Hence this patch just modifies convert_tuples_by_position to not complain if either the input or the output tupdesc has typmod -1. This is still a shade tighter checking than we did before 9.0, since before that plpgsql failed to consider typmods at all when checking record compatibility. (convert_tuples_by_position is currently used only by plpgsql, so we're not affecting other behavior.) Back-patch to 8.4, since we recently back-ported convert_tuples_by_position into that branch. |
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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. 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/.