index ad1aa6c5301000a517f040b2b170a3a691ba244d..10b3ed56f7898c43ec89067ae998bd5d9dd79fc2 100644 (file)
-->
<para>
- Improve handling of partition dependency (Tom Lane)
- </para>
-
- <para>
- This prevents the creation of inconsistent partition hierarchies
- in rare cases.
+ Fix bugs that could cause <command>ALTER TABLE DETACH
+ PARTITION</command> to not drop objects that should be dropped,
+ such as automatically-created child indexes (Tom Lane)
</para>
</listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
2019年02月09日 [1fb57af92] Create the infrastructure for planner support functions.
--->
-
- <para>
- Add support for <link linkend="sql-createfunction">function
- selectivity</link> (Tom Lane)
- </para>
- </listitem>
-
- <listitem>
-<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
2019年02月09日 [a391ff3c3] Build out the planner support function infrastructure.
-->
<para>
- Use the new support function capability to improve optimizer
- estimates for some functions (Tom Lane)
+ Add support function capability to improve optimizer estimates
+ for functions (Tom Lane)
</para>
<para>
- Specifically, improve them for
- <function>generate_series()</function>,
+ This allows extensions to create planner support functions that
+ can provide function-specific selectivity, cost, and row-count
+ estimates that can depend on the function arguments. Also, improve
+ in-core estimates for <function>generate_series()</function>,
<function>unnest()</function>, and functions that return boolean
values.
</para>