1 files changed, 86 insertions, 0 deletions
diff --git a/src/backend/access/strat.h b/src/backend/access/strat.h
new file mode 100644
index 00000000000..4ddb2190d88
--- /dev/null
+++ b/src/backend/access/strat.h
@@ -0,0 +1,86 @@
+/*-------------------------------------------------------------------------
+ *
+ * strat.h--
+ *    index strategy type definitions
+ *    (separated out from original istrat.h to avoid circular refs)
+ *
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ * $Id: strat.h,v 1.1.1.1 1996/07/09 06:21:09 scrappy Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef STRAT_H
+#define STRAT_H
+
+#include "postgres.h"
+#include "access/attnum.h"
+#include "access/skey.h"
+
+typedef uint16	StrategyNumber;
+
+#define InvalidStrategy	0
+
+typedef struct StrategyTransformMapData {
+    StrategyNumber	strategy[1];	/* VARIABLE LENGTH ARRAY */
+} StrategyTransformMapData;	/* VARIABLE LENGTH STRUCTURE */
+
+typedef StrategyTransformMapData	*StrategyTransformMap;
+
+typedef struct StrategyOperatorData {
+    StrategyNumber	strategy;
+    bits16		flags;		/* scan qualification flags h/skey.h */
+} StrategyOperatorData;
+
+typedef StrategyOperatorData	*StrategyOperator;
+
+typedef struct StrategyTermData {	/* conjunctive term */
+    uint16			degree;
+    StrategyOperatorData	operatorData[1];	/* VARIABLE LENGTH */
+} StrategyTermData;	/* VARIABLE LENGTH STRUCTURE */
+
+typedef StrategyTermData	*StrategyTerm;
+
+typedef struct StrategyExpressionData {	/* disjunctive normal form */
+    StrategyTerm	term[1];	/* VARIABLE LENGTH ARRAY */
+} StrategyExpressionData;	/* VARIABLE LENGTH STRUCTURE */
+
+typedef StrategyExpressionData	*StrategyExpression;
+
+typedef struct StrategyEvaluationData {
+    StrategyNumber		maxStrategy;
+    StrategyTransformMap	negateTransform;
+    StrategyTransformMap	commuteTransform;
+    StrategyTransformMap	negateCommuteTransform;
+    StrategyExpression	expression[12];	/* XXX VARIABLE LENGTH */
+} StrategyEvaluationData;	/* VARIABLE LENGTH STRUCTURE */
+
+typedef StrategyEvaluationData	*StrategyEvaluation;
+
+/*
+ * StrategyTransformMapIsValid --
+ *	Returns true iff strategy transformation map is valid.
+ */
+#define	StrategyTransformMapIsValid(transform) PointerIsValid(transform)
+
+
+#ifndef	CorrectStrategies		/* XXX this should be removable */
+#define AMStrategies(foo)	12
+#else	/* !defined(CorrectStrategies) */
+#define AMStrategies(foo)	(foo)
+#endif	/* !defined(CorrectStrategies) */
+
+typedef struct StrategyMapData {
+	ScanKeyData		entry[1];	/* VARIABLE LENGTH ARRAY */
+} StrategyMapData;	/* VARIABLE LENGTH STRUCTURE */
+
+typedef StrategyMapData	*StrategyMap;
+
+typedef struct IndexStrategyData {
+	StrategyMapData	strategyMapData[1];	/* VARIABLE LENGTH ARRAY */
+} IndexStrategyData;	/* VARIABLE LENGTH STRUCTURE */
+
+typedef IndexStrategyData	*IndexStrategy;
+
+#endif /*STRAT_H */