1 files changed, 15 insertions, 0 deletions
diff --git a/src/include/foreign/fdwapi.h b/src/include/foreign/fdwapi.h
index 1d768412af2..c683d9259e4 100644
--- a/src/include/foreign/fdwapi.h
+++ b/src/include/foreign/fdwapi.h
@@ -82,6 +82,17 @@ typedef void (*EndForeignModify_function) (EState *estate,
 
 typedef int (*IsForeignRelUpdatable_function) (Relation rel);
 
+typedef void (*GetForeignJoinPaths_function) (PlannerInfo *root,
+											  RelOptInfo *joinrel,
+											  RelOptInfo *outerrel,
+											  RelOptInfo *innerrel,
+											  List *restrictlist,
+											  JoinType jointype,
+											  SpecialJoinInfo *sjinfo,
+											  SemiAntiJoinFactors *semifactors,
+											  Relids param_source_rels,
+											  Relids extra_lateral_rels);
+
 typedef void (*ExplainForeignScan_function) (ForeignScanState *node,
 													struct ExplainState *es);
 
@@ -150,10 +161,14 @@ typedef struct FdwRoutine
 
 	/* Support functions for IMPORT FOREIGN SCHEMA */
 	ImportForeignSchema_function ImportForeignSchema;
+
+	/* Support functions for join push-down */
+	GetForeignJoinPaths_function GetForeignJoinPaths;
 } FdwRoutine;
 
 
 /* Functions in foreign/foreign.c */
+extern Oid GetFdwHandlerByRelId(Oid relid);
 extern FdwRoutine *GetFdwRoutine(Oid fdwhandler);
 extern FdwRoutine *GetFdwRoutineByRelId(Oid relid);
 extern FdwRoutine *GetFdwRoutineForRelation(Relation relation, bool makecopy);