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In a construct like "select plain_function(set_returning_function(...))", the plain function is applied to each output row of the SRF successively. If some of the SRF outputs are NULL, and the plain function is strict, you'd expect to get NULL results for such rows ... but what actually happened was that such rows were omitted entirely from the result set. This was due to confusion of this case with what should happen for nested set-returning functions; a strict SRF is indeed supposed to yield an empty set for null input. Per bug #8150 from Erwin Brandstetter. Although this has been broken forever, we're not back-patching because of the possibility that some apps out there expect the incorrect behavior. This change should be listed as a possible incompatibility in the 9.3 release notes.
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/.