聚集Limit下推优化

src/include/executor/node/nodeAgg.h

@@ -410,6 +410,7 @@ typedef struct AggStatePerPhaseData {
     FmgrInfo* eqfunctions;    /* per-grouping-field equality fns */
     Agg* aggnode;             /* Agg node for phase data */
     Sort* sortnode;           /* Sort node for input ordering for phase */
+    SortGroup* sortGroupNode; /* SortGroup node for input ordering for phase */
     AggStrategy aggstrategy;  /* strategy mode */
     ExprState *evaltrans;     /* evaluation of transition functions */
 } AggStatePerPhaseData;

src/include/executor/node/nodeSortGroup.h

@@ -0,0 +1,26 @@
+/* -------------------------------------------------------------------------
+ *
+ * nodeSortGroup.h
+ *	  support for the openGauss executor module
+ *
+ *
+ * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ * Portions Copyright (c) 2022, openGauss Contributors
+ *
+ * src/include/executor/nodeSortGroup.h
+ *
+ * -------------------------------------------------------------------------
+ */
+
+#ifndef NODESORTGROUP_H
+#define NODESORTGROUP_H
+
+
+#include "nodes/execnodes.h"
+
+extern SortGroupState *ExecInitSortGroup(SortGroup *node, EState *estate, int eflags);
+extern void ExecEndSortGroup(SortGroupState *node);
+extern void ExecReScanSortGroup(SortGroupState *node);
+
+#endif /*NODESORTGROUP_H*/