74a3fc36f3
The regression tests for TOAST compression methods are split into two independent files: one specific to LZ4 and interactions between two different TOAST compression methods, now called compression_lz4, and a second one for the "core" cases where only pglz is required. This saves 300 lines in diffs coming from the alternate output of compression.sql, required for builds where lz4 is not available. The new test is skipped if the build does not support LZ4 compression, relying on an \if and the values reported in pg_settings for the GUC default_toast_compression, "lz4" being available only under USE_LZ4. Another benefit of this split is that this facilitates the addition of more compression methods for TOAST, which are under discussion. Note the trick added for the tests of the GUC default_toast_compression, where VERBOSITY = terse is used to avoid the HINT printing the lists of values available in the GUC, which are environment-dependent. This makes compression.sql independent of the availability of LZ4. The code coverage of toast_compression.c is slightly improved, increased from 89% to 91%, with one new case covered in lz4_compress_datum() for incompressible data. Author: Nikhil Kumar Veldanda <veldanda.nikhilkumar17@gmail.com> Co-authored-by: Michael Paquier <michael@paquier.xyz> Discussion: https://postgr.es/m/aDlcU-ym9KfMj9sG@paquier.xyz
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/.