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This feature caters to specialized use-cases such as running the normal pgbench scenario with nonstandard indexes, or inserting other actions between steps of the initialization sequence. The normal sequence of initialization actions is broken down into half a dozen steps which can be executed in a user-specified order, to the extent to which that's sensible. The actions themselves aren't changed, except to make them more robust against nonstandard uses: * all four tables are now dropped in one DROP command, to reduce assumptions about what foreign key relationships exist; * all four tables are now truncated at the start of the data load step, for consistency; * the foreign key creation commands now specify constraint names, to prevent accidentally creating duplicate constraints by executing the 'f' step twice. Make some cosmetic adjustments in the messages emitted by pgbench so that it's clear which steps are getting run, and so that the messages agree with the documented names of the steps. In passing, fix failure to enforce that the -v option is used only in benchmarking mode. Masahiko Sawada, reviewed by Fabien Coelho, editorialized a bit by me Discussion: https://postgr.es/m/CAD21AoCsz0ZzfCFcxYZ+PUdpkDd5VsCSG0Pre_-K1EgokCDFYA@mail.gmail.com |
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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/.