19d4f9ffc2
pgbench uses readCommandResponse() to process server responses. When readCommandResponse() encounters an error during a call to PQgetResult() to fetch the current result, it attempts to report it with an additional error message from PQerrorMessage(). However, previously, this extra error message could be lost or become incorrect. The cause was that after fetching the current result (and detecting an error), readCommandResponse() called PQgetResult() again to peek at the next result. This second call could overwrite the libpq connection's error message before the original error was reported, causing the error message retrieved from PQerrorMessage() to be lost or overwritten. This commit fixes the issue by updating readCommandResponse() to use PQresultErrorMessage() instead of PQerrorMessage() to retrieve the error message generated when the PQgetResult() for the current result causes an error, ensuring the correct message is reported. Backpatch to all supported versions. Author: Yugo Nagata <nagata@sraoss.co.jp> Reviewed-by: Chao Li <lic@highgo.com> Reviewed-by: Fujii Masao <masao.fujii@gmail.com> Discussion: https://postgr.es/m/20250925110940.ebacc31725758ec47d5432c6@sraoss.co.jp Backpatch-through: 13
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/.