postgres-github.git / summary / log / commit / refs

commit    0f4c170cf3b85ef8b092990a88e5b7b50892f7d5
Author:   Melanie Plageman <melanieplageman@gmail.com>
Date:     Mon Mar 30 13:38:03 2026 +0000

    Make it cheap to check if a relation is modified by a query
    
    Save the range table indexes of result relations and row mark relations
    in separate bitmapsets in the PlannedStmt. Precomputing them allows
    cheap membership checks during execution. Together, these two groups
    approximate all relations that will be modified by a query. This
    includes relations targeted by INSERT, UPDATE, DELETE, and MERGE as well
    as relations with any row mark (like SELECT FOR UPDATE).
    
    Future work will use information on whether or not a relation is
    modified by a query in a heuristic.
    
    PlannedStmt->resultRelations is only used in a membership check, so it
    will be removed in a separate commit.
    
    Author: Melanie Plageman <melanieplageman@gmail.com>
    Reviewed-by: Andres Freund <andres@anarazel.de>
    Reviewed-by: David Rowley <dgrowleyml@gmail.com>
    Reviewed-by: Chao Li <li.evan.chao@gmail.com>
    Discussion: https://postgr.es/m/F5CDD1B5-628C-44A1-9F85-3958C626F6A9%40gmail.com

[parent: 1bd6f22f43ac]