From: Robert Haas <rhaas@postgresql.org>
Date: Fri, 27 Jul 2012 18:28:04 +0000 (+0000)
Subject: Another test case.
X-Git-Url: http://git.postgresql.org/gitweb/static/developers.postgresql.org?a=commitdiff_plain;h=ba7ab91791b68e54ad8385083f2f2f0fc9714f33;p=users%2Frhaas%2Fpostgres.git

Another test case.
---

diff --git a/contrib/hashtest/hashtest--1.0.sql b/contrib/hashtest/hashtest--1.0.sql
index b35a520af6..5d37927618 100644
--- a/contrib/hashtest/hashtest--1.0.sql
+++ b/contrib/hashtest/hashtest--1.0.sql
@@ -21,6 +21,11 @@ RETURNS void
 AS 'MODULE_PATHNAME', 'chash_concurrent_test'
 LANGUAGE C;
 
+CREATE FUNCTION chash_collision_test()
+RETURNS void
+AS 'MODULE_PATHNAME', 'chash_collision_test'
+LANGUAGE C;
+
 CREATE FUNCTION dynahash_insert_test()
 RETURNS void
 AS 'MODULE_PATHNAME', 'dynahash_insert_test'
diff --git a/contrib/hashtest/hashtest.c b/contrib/hashtest/hashtest.c
index 90d525da1d..16ac27a194 100644
--- a/contrib/hashtest/hashtest.c
+++ b/contrib/hashtest/hashtest.c
@@ -18,6 +18,7 @@ Datum		chash_insert_test(PG_FUNCTION_ARGS);
 Datum		chash_search_test(PG_FUNCTION_ARGS);
 Datum		chash_delete_test(PG_FUNCTION_ARGS);
 Datum		chash_concurrent_test(PG_FUNCTION_ARGS);
+Datum		chash_collision_test(PG_FUNCTION_ARGS);
 Datum		dynahash_insert_test(PG_FUNCTION_ARGS);
 Datum		dynahash_search_test(PG_FUNCTION_ARGS);
 Datum		dynahash_delete_test(PG_FUNCTION_ARGS);
@@ -26,6 +27,8 @@ static void hashtest_shmem_startup(void);
 PG_FUNCTION_INFO_V1(chash_insert_test);
 PG_FUNCTION_INFO_V1(chash_search_test);
 PG_FUNCTION_INFO_V1(chash_delete_test);
+PG_FUNCTION_INFO_V1(chash_concurrent_test);
+PG_FUNCTION_INFO_V1(chash_collision_test);
 PG_FUNCTION_INFO_V1(dynahash_insert_test);
 PG_FUNCTION_INFO_V1(dynahash_search_test);
 PG_FUNCTION_INFO_V1(dynahash_delete_test);
@@ -225,6 +228,49 @@ chash_concurrent_test(PG_FUNCTION_ARGS)
 	PG_RETURN_VOID();
 }
 
+Datum
+chash_collision_test(PG_FUNCTION_ARGS)
+{
+	uint32	i;
+	hentry	e;
+
+	/* Don't stack-allocate this. */
+	static bool mine[10000];
+
+	memset(mine, 0, 10000 * sizeof(bool));
+
+	for (i = 0; i < 10000; ++i)
+	{
+		bool ok;
+
+		e.key = i;
+		e.val = MyProcPid;
+		ok = CHashInsert(chash, &e);
+		if (ok)
+			mine[i] = true;
+	}
+
+	for (i = 0; i < 10000; ++i)
+	{
+		bool ok;
+
+		if (!mine[i])
+			continue;
+		e.key = i;
+		ok = CHashSearch(chash, &e);
+		if (!ok)
+			elog(LOG, "search %u: not found", i);
+		if (e.val != MyProcPid)
+			elog(LOG, "search %u: expected %u found %u",
+				 i, (unsigned) MyProcPid, e.val);
+		ok = CHashDelete(chash, &e);
+		if (!ok)
+			elog(LOG, "delete %u: not found", i);
+	}
+
+	PG_RETURN_VOID();
+}
+
 static bool
 dynahash_insert(uint32 key, uint32 val)
 {