19b966243c
The regex mechanism scans through the first "max_chr" character values to cache character property ranges (isalpha, etc.). For single-byte encodings, there's no sense in scanning beyond UCHAR_MAX; but for UTF-8 it makes sense to cache higher code point values (though not all of them; only up to MAX_SIMPLE_CHR). Prior to5a38104b36, the logic about how many character values to scan was based on the pg_regex_strategy, which was dependent on the provider. Commit5a38104b36preserved that logic exactly, allowing different providers to define the "max_chr". Now, change it to depend only on the encoding and whether ctype_is_c. For this specific calculation, distinguishing between providers creates more complexity than it's worth. Discussion: https://postgr.es/m/450ceb6260cad30d7afdf155d991a9caafee7c0d.camel@j-davis.com Reviewed-by: Chao Li <li.evan.chao@gmail.com>
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/.