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Without the cast, the return type could be long or long long, depending on what int64 is underneath. This doesn't affect code correctness, but it could result in format-mismatch warnings when attempting to printf such values using PRId64. Reported-by: Thomas Munro <thomas.munro@gmail.com> Discussion: https://www.postgresql.org/message-id/flat/CA+hUKGJc4s+Wyb3EFOQNN9VVK+Qv40r2LK41o9PkS9ThxviTvQ@mail.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/.