1 files changed, 59 insertions, 0 deletions
diff --git a/src/backend/optimizer/cost.h b/src/backend/optimizer/cost.h
new file mode 100644
index 00000000000..041dcbbe8e8
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+++ b/src/backend/optimizer/cost.h
@@ -0,0 +1,59 @@
+/*-------------------------------------------------------------------------
+ *
+ * cost.h--
+ *    prototypes for costsize.c and clausesel.c.
+ *
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ * $Id: cost.h,v 1.1.1.1 1996/07/09 06:21:34 scrappy Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef COST_H
+#define COST_H
+
+/*
+ * prototypes for costsize.c--
+ *    routines to compute costs and sizes
+ */ 
+extern bool _enable_seqscan_;
+extern bool _enable_indexscan_;
+extern bool _enable_sort_;
+extern bool _enable_hash_;
+extern bool _enable_nestloop_;
+extern bool _enable_mergesort_;
+extern bool _enable_hashjoin_;
+
+extern Cost cost_seqscan(int relid, int relpages, int reltuples);
+extern Cost cost_index(Oid indexid, int expected_indexpages, Cost selec,
+		       int relpages, int reltuples, int indexpages,
+		       int indextuples, bool is_injoin);
+extern Cost cost_sort(List *keys, int tuples, int width, bool noread);
+extern Cost cost_result(int tuples, int width);
+extern Cost cost_nestloop(Cost outercost, Cost innercost, int outertuples,
+		int innertuples, int outerpages, bool is_indexjoin);
+extern Cost cost_mergesort(Cost outercost, Cost innercost,
+		List *outersortkeys, List *innersortkeys,
+		int outersize, int innersize, int outerwidth, int innerwidth);
+extern Cost cost_hashjoin(Cost outercost, Cost innercost, List *outerkeys,
+		List *innerkeys, int outersize, int innersize,
+		int outerwidth, int innerwidth);
+extern int compute_rel_size(Rel *rel);
+extern int compute_rel_width(Rel *rel);
+extern int compute_targetlist_width(List *targetlist);
+extern int compute_joinrel_size(JoinPath *joinpath);
+extern int page_size(int tuples, int width);
+
+/*
+ * prototypes for fuctions in clausesel.h--
+ *    routines to compute clause selectivities
+ */
+extern void set_clause_selectivities(List *clauseinfo_list, Cost new_selectivity);
+extern Cost product_selec(List *clauseinfo_list);
+extern void set_rest_relselec(Query *root, List *rel_list);
+extern void set_rest_selec(Query *root,List *clauseinfo_list);
+extern Cost compute_clause_selec(Query *root,
+				 Node *clause, List *or_selectivities);
+
+#endif	/* COST_H */