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Up to now we just punted on showing the window definitions used in a plan, with window function calls represented as "OVER (?)". To improve that, show the window definition implemented by each WindowAgg plan node, and reference their window names in OVER. For nameless window clauses generated by "OVER (...)", assign unique names w1, w2, etc. In passing, re-order the properties shown for a WindowAgg node so that the Run Condition (if any) appears after the Window property and before the Filter (if any). This seems more sensible since the Run Condition is associated with the Window and acts before the Filter. Thanks to David G. Johnston and Álvaro Herrera for design suggestions. Author: Tom Lane <tgl@sss.pgh.pa.us> Reviewed-by: David Rowley <dgrowleyml@gmail.com> Discussion: https://postgr.es/m/144530.1741469955@sss.pgh.pa.us
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.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.