1acd0f5527
Invent a notion of "local" storage that will automatically be reclaimed at the end of each statement. Use this for location strings as well as other visibly short-lived data within the parser. Also, make cat_str and make_str return local storage and not free their inputs, which allows dispensing with a whole lot of retail mm_strdup calls. We do have to add some new ones in places where a local-lifetime string needs to be added to a longer-lived data structure, but on balance there are a lot less mm_strdup calls than before. In hopes of flushing out places where changes were necessary, I changed YYLTYPE from "char *" to "const char *", which forced const-ification of various function arguments that probably should've been like that all along. This still leaks somewhat more memory than v17, but that will be cleaned up in future commits. Discussion: https://postgr.es/m/2011420.1713493114@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/.