d2cba4f2cb
We were not being clear about which variants of the "direction" clause are permitted in MOVE. Also, the text seemed to be written with only the FETCH/MOVE NEXT case in mind, so it didn't apply very well to other variants. Also, document that "MOVE count IN cursor" only works if count is a constant. This is not the whole truth, because some other cases such as a parenthesized expression will also work, but we want to push people to use "MOVE FORWARD count" instead. The constant case is enough to cover what we allow in plain SQL, and that seems sufficient to claim support for. Update a comment in pl_gram.y claiming that we don't document that point. Per gripe from Philipp Salvisberg. Discussion: https://postgr.es/m/172155553388.702.7932496598218792085@wrigleys.postgresql.org
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/.