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Add cross-type comparisons to contrib/btree_gin.

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Extend the infrastructure in btree_gin.c to permit cross-type
operators, and add the code to support them for the int2, int4,
and int8 opclasses.  (To keep this patch digestible, I left
the other datatypes for a separate patch.)  This improves the
usability of btree_gin indexes by allowing them to support the
same set of queries that a regular btree index does.

Author: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Arseniy Mukhin <arseniy.mukhin.dev@gmail.com>
Discussion: https://postgr.es/m/262624.1738460652@sss.pgh.pa.us
This commit is contained in:
Tom Lane
2025-07-03 16:24:31 -04:00
parent 0059bbe1ec
commit e2b64fcef3
13 changed files with 932 additions and 86 deletions
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6
doc/src/sgml/gin.sgml
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@ -394,7 +394,11 @@
Pointer extra_data)</function></term>
<listitem>
<para>
Compare a partial-match query key to an index key. Returns an integer
Compare a partial-match query key to an index key.
<literal>partial_key</literal> is a query key that was returned
by <function>extractQuery</function> with an indication that it
requires partial match, and <literal>key</literal> is an index entry.
Returns an integer
whose sign indicates the result: less than zero means the index key
does not match the query, but the index scan should continue; zero
means that the index key does match the query; greater than zero