719dcf3c42
PlannedStmt gains a new field, called CachedPlanType, able to track if a given plan tree originates from the cache and if we are dealing with a generic or custom cached plan. This field can be used for monitoring or statistical purposes, in the executor hooks, for example, based on the planned statement attached to a QueryDesc. A patch is under discussion for pg_stat_statements to provide an equivalent of the counters in pg_prepared_statements for custom and generic plans, to provide a more global view of such data, as this data is now restricted to the current session. The concept introduced in this commit is useful on its own, and has been extracted from a larger patch by the same author. Author: Sami Imseih <samimseih@gmail.com> Reviewed-by: Andrei Lepikhov <lepihov@gmail.com> Reviewed-by: Michael Paquier <michael@paquier.xyz> Discussion: https://postgr.es/m/CAA5RZ0uFw8Y9GCFvafhC=OA8NnMqVZyzXPfv_EePOt+iv1T-qQ@mail.gmail.com |
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| COPYRIGHT | ||
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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.
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/.