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The allowed syntax for OVERLAPS, viz "row OVERLAPS row", is sufficiently constrained that we don't actually need a precedence declaration for OVERLAPS; indeed removing this declaration does not change the generated gram.c file at all. Let's remove it to avoid confusion about whether OVERLAPS has precedence or not. If we ever generalize what we allow for OVERLAPS, we might need to put back a precedence declaration for it, but we might want some other level than what it has today --- and leaving the declaration there would just risk confusion about whether that would be an incompatible change. Likewise, remove OVERLAPS from the documentation's precedence table. Per discussion with Noah Misch. Back-patch to 9.5 where we hacked up some nearby precedence decisions.
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/.