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

commit    f7f4052a4e959ded803417b14af2b45316445940
Author:   Dean Rasheed <dean.a.rasheed@gmail.com>
Date:     Wed Apr 01 16:02:24 2026 +0000

    Add support for extended statistics on virtual generated columns.
    
    This allows both univariate and multivariate statistics to be built on
    virtual generated columns and expressions that refer to virtual
    generated columns. The restriction disallowing extended statistics on
    a single column is lifted in the case of a single virtual generated
    column, since it is treated as a single expression.
    
    In the catalogs, references to virtual generated columns are stored
    as-is. They are expanded at ANALYZE time to build the statistics, and
    at planning time to allow the optimizer to make use of the statistics.
    This allows the statistics to be correctly rebuilt using ANALYZE, if a
    column's generation expression is altered (which causes any existing
    statistics data to be deleted).
    
    Author: Yugo Nagata <nagata@sraoss.co.jp>
    Reviewed-by: Dean Rasheed <dean.a.rasheed@gmail.com>
    Discussion: https://postgr.es/m/20250422181006.dd6f9d1d81299f5b2ad55e1a@sraoss.co.jp

[parent: 196bf448e005]