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9ff5b699ed
Make patternsel_common() select the comparison operators to use with hardwired logic that matches pattern_prefix()'s new logic, eliminating its dependencies on particular index opfamilies. This shouldn't change any behavior, as it's just replacing runtime operator lookups with the same values hard-wired. But it makes these closely-related functions look more alike, and saving some runtime syscache lookups is worth something. Actually, it's not quite true that this is zero behavioral change: when estimating for a column of type "name", the comparison constant will be kept as "text" not coerced to "name". But that's more correct anyway, and it allows additional simplification of the coercion logic, again syncing this more closely with pattern_prefix(). Per consideration of a report from Manuel Rigger. Discussion: https://postgr.es/m/CA+u7OA7nnGYy8rY0vdTe811NuA+Frr9nbcBO9u2Z+JxqNaud+g@mail.gmail.com |
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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: https://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 https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.