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This commit introduces a new field 'sublevels_up' in ReplaceVarnoContext, and enhances replace_varno_walker() to: 1) recurse into subselects with sublevels_up increased, and 2) perform the replacement only when varlevelsup is equal to sublevels_up. This commit also fixes some outdated comments. And besides adding relevant test cases, it makes some unification over existing SJE test cases. Discussion: https://postgr.es/m/CAMbWs4-%3DPO6Mm9gNnySbx0VHyXjgnnYYwbN9dth%3DTLQweZ-M%2Bg%40mail.gmail.com Author: Richard Guo Reviewed-by: Andrei Lepikhov, Alexander Korotkov
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/.