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For objects such as functions, pg_dump issues the same secondary data-collection query against each object to be dumped. This can't readily be refactored to avoid the repetitive queries, but we can PREPARE these queries to reduce planning costs. This patch applies the idea to functions, aggregates, operators, and data types. While it could be carried further, the remaining sorts of objects aren't likely to appear in typical databases enough times to be worth worrying over. Moreover, doing the PREPARE is likely to be a net loss if there aren't at least some dozens of objects to apply the prepared query to. Discussion: https://postgr.es/m/7d7eb6128f40401d81b3b7a898b6b4de@W2012-02.nidsa.loc
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/.