<!--
2024-08-20 [adf97c156] Speed up Hash Join by making ExprStates support hashing
+2024-12-11 [0f5738202] Use ExprStates for hashing in GROUP BY and SubPlans
+2025-03-24 [4d143509c] Create accessor functions for TupleHashEntry.
+2025-03-24 [a0942f441] Add ExecCopySlotMinimalTupleExtra().
+2025-03-24 [626df47ad] Remove 'additional' pointer from TupleHashEntryData.
-->
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<para>
-Improve the performance of hash joins (David Rowley)
+Improve the performance and reduce memory usage of hash joins and GROUP BY (David Rowley, Jeff Davis)
<ulink url="&commit_baseurl;adf97c156">§</ulink>
+<ulink url="&commit_baseurl;0f5738202">§</ulink>
+<ulink url="&commit_baseurl;4d143509c">§</ulink>
+<ulink url="&commit_baseurl;a0942f441">§</ulink>
+<ulink url="&commit_baseurl;626df47ad">§</ulink>
+</para>
+
+<para>
+This also improves hash set operations used by EXCEPT, and hash lookups of subplan values.
</para>
</listitem>