8ac4c25a05
Compression with gzip has never been supported in the tar format of pg_dump since this code has been introduced in c3e18804, as the use of buffered I/O in gzdopen() changes the file positioning that tar requires. The original idea behind the use of compression with the tar mode is to be able to include compressed data files (named %u.dat.gz) and blob files (blob_%u.dat.gz) in the tarball generated by the dump, with toc.dat, that tracks down if compression is used in the dump, always uncompressed. Note that this commit removes the dump part of the code as well as the restore part, removing any dependency to zlib in pg_backup_tar.c. There could be an argument behind keeping around the restore part, but this would require one to change the internals of a tarball previously dumped so as data and blob files are compressed with toc.dat itself changed to track down if compression is enabled. However, the argument about gzdopen() still holds in the read case with pg_restore. Removing this code simplifies future additions related to compression in pg_dump. Author: Georgios Kokolatos, Rachel Heaton Discussion: https://postgr.es/m/faUNEOpts9vunEaLnmxmG-DldLSg_ql137OC3JYDmgrOMHm1RvvWY2IdBkv_CRxm5spCCb_OmKNk2T03TMm0fBEWveFF9wA1WizPuAgB7Ss=@protonmail.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/.