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In commit 9118d03a8cca3d97 we taught the planner to postpone evaluation of set-returning functions in a SELECT's targetlist until after any sort done to satisfy ORDER BY. However, if we postpone some SRFs this way while others do not get postponed (because they're sort or group key columns) we will break the traditional behavior by which all SRFs in the tlist run in-step during ExecTargetList(), so that you get the least common multiple of their periods not the product. Fix make_sort_input_target() so it will not split up SRF evaluation in such cases. There is still a hazard of similar odd behavior if there's a SRF in a grouping column and another one that isn't, but that was true before and we're just trying to preserve bug-compatibility with the traditional behavior. This whole area is overdue to be rethought and reimplemented, but we'll try to avoid changing behavior until then. Per report from Regina Obe.
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/.