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49635d7b3e
Teach make_group_input_target() and make_window_input_target() to work entirely with the PathTarget representation of tlists, rather than constructing a tlist and immediately deconstructing it into PathTarget format. In itself this only saves a few palloc's; the bigger picture is that it opens the door for sharing cost_qual_eval work across all of planner.c's constructions of PathTargets. I'll come back to that later. In support of this, flesh out tlist.c's infrastructure for PathTargets a bit more.
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/.