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This function attribute tells the compiler that the function will never return NULL. This allows the compiler to do better static analysis and lets it optimize the caller given the non-NULL guarantee. The attribute is placed in front of the declaration, rather than after it, so that it can also expand to the MSVC annotation _Ret_notnull_, which is only valid in that position. Only functions that raise an error on allocation failure are marked. Functions that take a flags argument, such as palloc_extended() and palloc_mul_extended(), can return NULL when MCXT_ALLOC_NO_OOM is passed and are therefore not marked. Author: Tristan Partin <tristan@partin.io> Discussion: https://www.postgresql.org/message-id/flat/DJROV5LUO7B5.DIWXYC0101KD%40partin.io
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/.