df293aed46
pg_restore_attribute_stats() and pg_restore_extended_stats() (expressions) can handle a STATISTIC_KIND_BOUNDS_HISTOGRAM value, but did not check its shape when importing, especially regarding: - Empty ranges. - Unsorted elements. These properties are respected by ANALYZE in compute_range_stats(), when computing a histogram for a [multi]range, and by the planner when reading the data from the stats catalogs. The effects of importing data with these properties depend on the compilation options: - A assertion would be hit, if enabled. - A non-sensical value that would make the load of the stats fail. - A failure is hit if an empty range is loaded. While the owner of the table or the one with MAINTAIN rights is responsible for the stats data inserted, buggy data makes little sense if their load is going to fail. This commit adds a validation step to match what compute_range_stats() expects. This issue would be unlikely hit in practice, so no backpatch is done. Author: Ewan Young <kdbase.hack@gmail.com> Discussion: https://postgr.es/m/CAON2xHNM809WLR_g0ymKgU-tWxtbyH1Xvh4fqzRqy9YP2A59pg@mail.gmail.com |
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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/.