From: Sebastian Harl <sh@tokkee.org>
Date: Thu, 3 May 2012 19:44:08 +0000 (+0200)
Subject: rrtimeslice: Added hash function and operator class.
X-Git-Url: https://git.tokkee.org/?p=postrr.git;a=commitdiff_plain;h=0478a7da8a276444f96d4d0a0a13fa9448ce9250

rrtimeslice: Added hash function and operator class.
---

diff --git a/src/postrr.h.in b/src/postrr.h.in
index 92025db..9a25d4e 100644
--- a/src/postrr.h.in
+++ b/src/postrr.h.in
@@ -94,6 +94,8 @@ Datum
 rrtimeslice_ge(PG_FUNCTION_ARGS);
 Datum
 rrtimeslice_cmp(PG_FUNCTION_ARGS);
+Datum
+rrtimeslice_hash(PG_FUNCTION_ARGS);
 
 /*
  * internal (not fmgr-callable) functions
diff --git a/src/postrr.sql.in b/src/postrr.sql.in
index ffdb3a7..c2b4821 100644
--- a/src/postrr.sql.in
+++ b/src/postrr.sql.in
@@ -135,6 +135,11 @@ CREATE OR REPLACE FUNCTION RRTimeslice_cmp(rrtimeslice, rrtimeslice)
 	AS 'postrr-@POSTRR_MAJOR_VERSION@.@POSTRR_MINOR_VERSION@', 'rrtimeslice_cmp'
 	LANGUAGE 'C' IMMUTABLE STRICT;
 
+CREATE OR REPLACE FUNCTION RRTimeslice_hash(rrtimeslice)
+	RETURNS integer
+	AS 'postrr-@POSTRR_MAJOR_VERSION@.@POSTRR_MINOR_VERSION@', 'rrtimeslice_hash'
+	LANGUAGE 'C' IMMUTABLE STRICT;
+
 CREATE OPERATOR = (
 	LEFTARG    = RRTimeslice,
 	RIGHTARG   = RRTimeslice,
@@ -198,6 +203,11 @@ CREATE OPERATOR CLASS rrtimeslice_ops
 		OPERATOR 5 > ,
 		FUNCTION 1 RRTimeslice_cmp(rrtimeslice, rrtimeslice);
 
+CREATE OPERATOR CLASS rrtimeslice_hash_ops
+	FOR TYPE RRTimeslice USING hash AS
+		OPERATOR 1 = ,
+		FUNCTION 1 RRTimeslice_hash(rrtimeslice);
+
 CREATE TYPE CData;
 
 CREATE OR REPLACE FUNCTION CData_validate(integer)
diff --git a/src/rrtimeslice.c b/src/rrtimeslice.c
index d34da91..b086622 100644
--- a/src/rrtimeslice.c
+++ b/src/rrtimeslice.c
@@ -39,6 +39,7 @@
 #include <fmgr.h>
 
 /* Postgres utilities */
+#include <access/hash.h>
 #include <executor/spi.h>
 #include <utils/array.h>
 #include <utils/datetime.h>
@@ -214,6 +215,7 @@ PG_FUNCTION_INFO_V1(rrtimeslice_gt);
 PG_FUNCTION_INFO_V1(rrtimeslice_le);
 PG_FUNCTION_INFO_V1(rrtimeslice_ge);
 PG_FUNCTION_INFO_V1(rrtimeslice_cmp);
+PG_FUNCTION_INFO_V1(rrtimeslice_hash);
 
 /*
  * public API
@@ -561,5 +563,12 @@ rrtimeslice_cmp(PG_FUNCTION_ARGS)
 	PG_RETURN_INT32(rrtimeslice_cmp_internal(ts1, ts2));
 } /* rrtimeslice_ge */
 
+Datum
+rrtimeslice_hash(PG_FUNCTION_ARGS)
+{
+	rrtimeslice_t *ts = PG_GETARG_RRTIMESLICE_P(0);
+	return hash_uint32(ts->seq);
+} /* rrtimeslice_hash */
+
 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */