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Currently, pgbench aborts when a COPY response is received in readCommandResponse(). However, as PQgetResult() returns an empty result when there is no asynchronous result, through getCopyResult(), the logic done at the end of readCommandResponse() for the error path leads to an infinite loop. This commit forcefully exits the COPY state with PQendcopy() before moving to the error handler when fiding a COPY state, avoiding the infinite loop. The COPY protocol is not supported by pgbench anyway, as an error is assumed in this case, so giving up is better than having the tool be stuck forever. pgbench was interruptible in this state. A TAP test is added to check that an error happens if trying to use COPY. Author: Anthonin Bonnefoy <anthonin.bonnefoy@datadoghq.com> Discussion: https://postgr.es/m/CAO6_XqpHyF2m73ifV5a=5jhXxH2chk=XrgefY+eWWPe2Eft3=A@mail.gmail.com 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. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.