Define EXT_OID_START to suggest oid range for extensions.

Fix GpMatviewAuxId has duplicated oid with other extensions.
All extension should use oids start from EXT_OID_START
to avoid this issue.

Authored-by: Zhang Mingli avamingli@gmail.com

src/include/catalog/gp_matview_aux.h

@@ -23,7 +23,7 @@
 /*
  * Defines for gp_matview_aux
  */
-CATALOG(gp_matview_aux,7061,GpMatviewAuxId) BKI_SHARED_RELATION
+CATALOG(gp_matview_aux,7153,GpMatviewAuxId) BKI_SHARED_RELATION
 {
 	Oid			mvoid; 	/* materialized view oid */
 	NameData	mvname; /* materialized view name */

src/include/catalog/gp_oid_divide.h

@@ -0,0 +1,30 @@
+/*-------------------------------------------------------------------------
+ *
+ * oid_divide.h
+ * 
+ * Portions Copyright (c) 2024-Present HashData, Inc. or its affiliates.
+ *
+ *
+ * IDENTIFICATION
+ *	    src/include/catalog/oid_divide.h
+ *
+ * NOTES
+ * 		This is used to divide oid range for core and extensions
+ *  	to avoid duplicated.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifndef GP_OID_DIVIDE_H
+#define GP_OID_DIVIDE_H
+
+/*
+ * Extensions should use Oids start from EXT_OID_START!
+ *
+ * To avoid duplicated oids across extensions or repos.
+ * We strongly suggest extesions should begin from EXT_OID_START
+ * to separate kernel and extensions.
+ */
+#define EXT_OID_START 9932
+
+#endif			/* GP_OID_DIVIDE_H */