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"in_streaming" is a flag used to track if an instance of pgoutput is streaming changes. When pgoutput is started, the flag was always reset, switched it back and forth in the stream start/stop callbacks. Before this commit, it was a global variable, which is confusing as it is actually attached to a state of PGOutputData. Per my analysis, using a global variable did not lead to an active bug like in 54ccfd65868c, but it makes the code more consistent. Note that we cannot backpatch this change anyway as it requires the addition of a new field to PGOutputData, exposed in pgoutput.h. Author: Hou Zhijie Reviewed-by: Amit Kapila, Michael Paquier, Peter Smith Discussion: https://postgr.es/m/OS0PR01MB571690EF24F51F51EFFCBB0E94FAA@OS0PR01MB5716.jpnprd01.prod.outlook.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. 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/.