diff --git a/src/backend/catalog/pg_inherits.c b/src/backend/catalog/pg_inherits.c
index 00f7957b3d..c4711490f1 100644
--- a/src/backend/catalog/pg_inherits.c
+++ b/src/backend/catalog/pg_inherits.c
@@ -25,6 +25,7 @@
 #include "catalog/indexing.h"
 #include "catalog/pg_inherits.h"
 #include "parser/parse_type.h"
+#include "partitioning/partprune.h"
 #include "storage/lmgr.h"
 #include "utils/builtins.h"
 #include "utils/fmgroids.h"
@@ -92,11 +93,16 @@ find_inheritance_children(Oid parentrelId, LOCKMODE lockmode)
 	while ((inheritsTuple = systable_getnext(scan)) != NULL)
 	{
 		inhrelid = ((Form_pg_inherits) GETSTRUCT(inheritsTuple))->inhrelid;
+
+		if (enable_partition_pruning && inhrelid && !partitionChildAccess_hook(inhrelid))
+			continue;
+
 		if (numoids >= maxoids)
 		{
 			maxoids *= 2;
 			oidarr = (Oid *) repalloc(oidarr, maxoids * sizeof(Oid));
 		}
+
 		oidarr[numoids++] = inhrelid;
 	}
 
diff --git a/src/backend/optimizer/path/allpaths.c b/src/backend/optimizer/path/allpaths.c
index 0debac75c6..185bfc10eb 100644
--- a/src/backend/optimizer/path/allpaths.c
+++ b/src/backend/optimizer/path/allpaths.c
@@ -1067,6 +1067,13 @@ set_append_rel_size(PlannerInfo *root, RelOptInfo *rel,
 			continue;
 		}
 
+		if (enable_partition_pruning && !partitionChildAccess_hook(childRTE->relid))
+		{
+			/* Implement custom partition pruning filter*/
+			set_dummy_rel_pathlist(childrel);
+			continue;
+		}
+
 		/*
 		 * CE failed, so finish copying/modifying targetlist and join quals.
 		 *
diff --git a/src/include/partitioning/partprune.h b/src/include/partitioning/partprune.h
index 2f75717ffb..968b0ccbe0 100644
--- a/src/include/partitioning/partprune.h
+++ b/src/include/partitioning/partprune.h
@@ -74,6 +74,12 @@ typedef struct PartitionPruneContext
 #define PruneCxtStateIdx(partnatts, step_id, keyno) \
 	((partnatts) * (step_id) + (keyno))
 
+/* Custom partition child access hook. Provides further partition pruning given
+ * child OID.
+ */
+typedef bool (*partitionChildAccess_hook_type) (Oid childOID);
+PGDLLIMPORT partitionChildAccess_hook_type partitionChildAccess_hook;
+
 extern PartitionPruneInfo *make_partition_pruneinfo(struct PlannerInfo *root,
 						 struct RelOptInfo *parentrel,
 						 List *subpaths,