2 files changed, 50 insertions, 0 deletions
diff --git a/src/backend/utils/cache/lsyscache.c b/src/backend/utils/cache/lsyscache.c
index 1dc293297d9..f259751e157 100644
--- a/src/backend/utils/cache/lsyscache.c
+++ b/src/backend/utils/cache/lsyscache.c
@@ -32,6 +32,7 @@
 #include "catalog/pg_range.h"
 #include "catalog/pg_statistic.h"
 #include "catalog/pg_transform.h"
+#include "catalog/pg_tablesample_method.h"
 #include "catalog/pg_type.h"
 #include "miscadmin.h"
 #include "nodes/makefuncs.h"
@@ -2996,3 +2997,29 @@ get_range_subtype(Oid rangeOid)
 	else
 		return InvalidOid;
 }
+
+/*				---------- PG_TABLESAMPLE_METHOD CACHE ----------			 */
+
+/*
+ * get_tablesample_method_name - given a tablesample method OID,
+ * look up the name or NULL if not found
+ */
+char *
+get_tablesample_method_name(Oid tsmid)
+{
+	HeapTuple	tuple;
+
+	tuple = SearchSysCache1(TABLESAMPLEMETHODOID, ObjectIdGetDatum(tsmid));
+	if (HeapTupleIsValid(tuple))
+	{
+		Form_pg_tablesample_method	tup =
+			(Form_pg_tablesample_method) GETSTRUCT(tuple);
+		char	   *result;
+
+		result = pstrdup(NameStr(tup->tsmname));
+		ReleaseSysCache(tuple);
+		return result;
+	}
+	else
+		return NULL;
+}
diff --git a/src/backend/utils/cache/syscache.c b/src/backend/utils/cache/syscache.c
index f58e1cebf2a..7def1be32ae 100644
--- a/src/backend/utils/cache/syscache.c
+++ b/src/backend/utils/cache/syscache.c
@@ -56,6 +56,7 @@
 #include "catalog/pg_shseclabel.h"
 #include "catalog/pg_replication_origin.h"
 #include "catalog/pg_statistic.h"
+#include "catalog/pg_tablesample_method.h"
 #include "catalog/pg_tablespace.h"
 #include "catalog/pg_transform.h"
 #include "catalog/pg_ts_config.h"
@@ -666,6 +667,28 @@ static const struct cachedesc cacheinfo[] = {
 		},
 		128
 	},
+	{TableSampleMethodRelationId,		/* TABLESAMPLEMETHODNAME */
+		TableSampleMethodNameIndexId,
+		1,
+		{
+			Anum_pg_tablesample_method_tsmname,
+			0,
+			0,
+			0,
+		},
+		2
+	},
+	{TableSampleMethodRelationId,		/* TABLESAMPLEMETHODOID */
+		TableSampleMethodOidIndexId,
+		1,
+		{
+			ObjectIdAttributeNumber,
+			0,
+			0,
+			0,
+		},
+		2
+	},
 	{TableSpaceRelationId,		/* TABLESPACEOID */
 		TablespaceOidIndexId,
 		1,