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find_derived_clause_for_ec_member() searches for a previously-derived clause that equates a non-constant EquivalenceMember to a constant. It is only called for EquivalenceClasses with ec_has_const set, and with a non-constant member the EquivalenceMember to search for. The matched clause is expected to have the non-constant member on the left-hand side and the constant EquivalenceMember on the right. Assert that the RHS is indeed a constant, to catch violations of this structure and enforce assumptions made by generate_base_implied_equalities_const(). Author: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com> Reviewed-by: Amit Langote <amitlangote09@gmail.com> Discussion: https://postgr.es/m/CAExHW5scMxyFRqOFE6ODmBiW2rnVBEmeEcA-p4W_CyuEikURdA@mail.gmail.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.
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/.