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Add generic_plans and custom_plans fields into pg_prepared_statements.

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There was no easy way to find how many times generic and custom plans
have been executed for a prepared statement. This commit exposes those
numbers of times in pg_prepared_statements view.

Author: Atsushi Torikoshi, Kyotaro Horiguchi
Reviewed-by: Tatsuro Yamada, Masahiro Ikeda, Fujii Masao
Discussion: https://postgr.es/m/CACZ0uYHZ4M=NZpofH6JuPHeX=__5xcDELF8hT8_2T+R55w4RQw@mail.gmail.com
This commit is contained in:
Fujii Masao
2020-07-20 11:55:50 +09:00
parent 044dc7b964
commit d05b172a76
8 changed files with 105 additions and 16 deletions
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18
doc/src/sgml/catalogs.sgml
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@@ -10841,6 +10841,24 @@ SELECT * FROM pg_locks pl LEFT JOIN pg_prepared_xacts ppx
frontend/backend protocol
</para></entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>generic_plans</structfield> <type>int8</type>
</para>
<para>
Number of times generic plan was chosen
</para></entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>custom_plans</structfield> <type>int8</type>
</para>
<para>
Number of times custom plan was chosen
</para></entry>
</row>
</tbody>
</tgroup>
</table>