4ea9948e58
The previous coding assumed that the value derived by set_rel_consider_parallel() for an appendrel parent would be accurate for all the appendrel's children; but this is not so, for example because one child might scan a temp table. Instead, apply set_rel_consider_parallel() to each child rel as well as the parent, and then take the AND of the results as controlling parallel safety for the appendrel as a whole. (We might someday be able to deal more intelligently than this with cases in which some of the childrels are parallel-safe and others not, but that's for later.) Robert Haas and Tom Lane
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/.