37d2ff3803
This makes the abstraction of a "source" server more clear, by introducing a common abstract class, borrowing the object-oriented programming term, that represents all the operations that can be done on the source server. There are two implementations of it, one for fetching via libpq, and another to fetch from a local directory. This adds some code, but makes it easier to understand what's going on. The copy_executeFileMap() and libpq_executeFileMap() functions contained basically the same logic, just calling different functions to fetch the source files. Refactor so that the common logic is in one place, in a new function called perform_rewind(). Reviewed-by: Kyotaro Horiguchi, Soumyadeep Chakraborty Discussion: https://www.postgresql.org/message-id/0c5b3783-af52-3ee5-f8fa-6e794061f70d%40iki.fi
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/.