1 files changed, 60 insertions, 0 deletions
diff --git a/src/include/optimizer/clauses.h b/src/include/optimizer/clauses.h
new file mode 100644
index 0000000..e71b06b
--- /dev/null
+++ b/src/include/optimizer/clauses.h
@@ -0,0 +1,60 @@
+/*-------------------------------------------------------------------------
+ *
+ * clauses.h
+ *	  prototypes for clauses.c.
+ *
+ *
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/optimizer/clauses.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef CLAUSES_H
+#define CLAUSES_H
+
+#include "access/htup.h"
+#include "nodes/pathnodes.h"
+
+typedef struct
+{
+	int			numWindowFuncs; /* total number of WindowFuncs found */
+	Index		maxWinRef;		/* windowFuncs[] is indexed 0 .. maxWinRef */
+	List	  **windowFuncs;	/* lists of WindowFuncs for each winref */
+} WindowFuncLists;
+
+extern bool contain_agg_clause(Node *clause);
+extern void get_agg_clause_costs(PlannerInfo *root, Node *clause,
+								 AggSplit aggsplit, AggClauseCosts *costs);
+
+extern bool contain_window_function(Node *clause);
+extern WindowFuncLists *find_window_functions(Node *clause, Index maxWinRef);
+
+extern double expression_returns_set_rows(PlannerInfo *root, Node *clause);
+
+extern bool contain_subplans(Node *clause);
+
+extern char max_parallel_hazard(Query *parse);
+extern bool is_parallel_safe(PlannerInfo *root, Node *node);
+extern bool contain_nonstrict_functions(Node *clause);
+extern bool contain_exec_param(Node *clause, List *param_ids);
+extern bool contain_leaked_vars(Node *clause);
+
+extern Relids find_nonnullable_rels(Node *clause);
+extern List *find_nonnullable_vars(Node *clause);
+extern List *find_forced_null_vars(Node *clause);
+extern Var *find_forced_null_var(Node *clause);
+
+extern bool is_pseudo_constant_clause(Node *clause);
+extern bool is_pseudo_constant_clause_relids(Node *clause, Relids relids);
+
+extern int	NumRelids(Node *clause);
+extern int	NumRelids_new(PlannerInfo *root, Node *clause);
+
+extern void CommuteOpExpr(OpExpr *clause);
+
+extern Query *inline_set_returning_function(PlannerInfo *root,
+											RangeTblEntry *rte);
+
+#endif							/* CLAUSES_H */