Transfer statistics during pg_upgrade. #29
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Add support to pg_dump for dumping stats, and use that during pg_upgrade so that statistics are transferred during upgrade. In most cases this removes the need for a costly re-analyze after upgrade. Some statistics are not transferred, such as extended statistics or statistics with a custom stakind. Now pg_dump accepts the options --schema-only, --no-schema, --data-only, --no-data, --statistics-only, and --no-statistics; which allow all combinations of schema, data, and/or stats. The options are named this way to preserve compatibility with the previous --schema-only and --data-only options. Statistics are in SECTION_DATA, unless the object itself is in SECTION_POST_DATA. The stats are represented as calls to pg_restore_relation_stats() and pg_restore_attribute_stats(). Author: Corey Huinker, Jeff Davis Reviewed-by: Jian He Discussion: https://postgr.es/m/CADkLM=fzX7QX6r78fShWDjNN3Vcr4PVAnvXxQ4DiGy6V=0bCUA@mail.gmail.com Discussion: https://postgr.es/m/CADkLM%3DcB0rF3p_FuWRTMSV0983ihTRpsH%2BOCpNyiqE7Wk0vUWA%40mail.gmail.com
rkhapov
approved these changes
Apr 30, 2025
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Add support to pg_dump for dumping stats, and use that during pg_upgrade so that statistics are transferred during upgrade. In most cases this removes the need for a costly re-analyze after upgrade.
Some statistics are not transferred, such as extended statistics or statistics with a custom stakind.
Now pg_dump accepts the options --schema-only, --no-schema, --data-only, --no-data, --statistics-only, and --no-statistics; which allow all combinations of schema, data, and/or stats. The options are named this way to preserve compatibility with the previous --schema-only and --data-only options.
Statistics are in SECTION_DATA, unless the object itself is in SECTION_POST_DATA.
The stats are represented as calls to pg_restore_relation_stats() and pg_restore_attribute_stats().
Author: Corey Huinker, Jeff Davis
Reviewed-by: Jian He
Discussion: https://postgr.es/m/CADkLM=fzX7QX6r78fShWDjNN3Vcr4PVAnvXxQ4DiGy6V=0bCUA@mail.gmail.com
Discussion: https://postgr.es/m/CADkLM%3DcB0rF3p_FuWRTMSV0983ihTRpsH%2BOCpNyiqE7Wk0vUWA%40mail.gmail.com