-->

<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>

2019-02-09 [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>

2019-02-09 [a391ff3c3] Build out the planner support function infrastructure.

-->

<para>

Use the newsupport function capability to improve optimizer

estimatesfor some functions (Tom Lane)

Addsupport 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>