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db_include/access/stratnum.h

@@ -0,0 +1,85 @@
+/*-------------------------------------------------------------------------
+ *
+ * stratnum.h
+ *	  POSTGRES strategy number definitions.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/access/stratnum.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef STRATNUM_H
+#define STRATNUM_H
+
+/*
+ * Strategy numbers identify the semantics that particular operators have
+ * with respect to particular operator classes.  In some cases a strategy
+ * subtype (an OID) is used as further information.
+ */
+typedef uint16 StrategyNumber;
+
+#define InvalidStrategy ((StrategyNumber) 0)
+
+/*
+ * Strategy numbers for B-tree indexes.
+ */
+#define BTLessStrategyNumber			1
+#define BTLessEqualStrategyNumber		2
+#define BTEqualStrategyNumber			3
+#define BTGreaterEqualStrategyNumber	4
+#define BTGreaterStrategyNumber			5
+
+#define BTMaxStrategyNumber				5
+
+/*
+ *	Strategy numbers for hash indexes. There's only one valid strategy for
+ *	hashing: equality.
+ */
+#define HTEqualStrategyNumber			1
+
+#define HTMaxStrategyNumber				1
+
+/*
+ * Strategy numbers common to (some) GiST, SP-GiST and BRIN opclasses.
+ *
+ * The first few of these come from the R-Tree indexing method (hence the
+ * names); the others have been added over time as they have been needed.
+ */
+#define RTLeftStrategyNumber			1	/* for << */
+#define RTOverLeftStrategyNumber		2	/* for &< */
+#define RTOverlapStrategyNumber			3	/* for && */
+#define RTOverRightStrategyNumber		4	/* for &> */
+#define RTRightStrategyNumber			5	/* for >> */
+#define RTSameStrategyNumber			6	/* for ~= */
+#define RTContainsStrategyNumber		7	/* for @> */
+#define RTContainedByStrategyNumber		8	/* for <@ */
+#define RTOverBelowStrategyNumber		9	/* for &<| */
+#define RTBelowStrategyNumber			10	/* for <<| */
+#define RTAboveStrategyNumber			11	/* for |>> */
+#define RTOverAboveStrategyNumber		12	/* for |&> */
+#define RTOldContainsStrategyNumber		13	/* for old spelling of @> */
+#define RTOldContainedByStrategyNumber	14	/* for old spelling of <@ */
+#define RTKNNSearchStrategyNumber		15	/* for <-> (distance) */
+#define RTContainsElemStrategyNumber	16	/* for range types @> elem */
+#define RTAdjacentStrategyNumber		17	/* for -|- */
+#define RTEqualStrategyNumber			18	/* for = */
+#define RTNotEqualStrategyNumber		19	/* for != */
+#define RTLessStrategyNumber			20	/* for < */
+#define RTLessEqualStrategyNumber		21	/* for <= */
+#define RTGreaterStrategyNumber			22	/* for > */
+#define RTGreaterEqualStrategyNumber	23	/* for >= */
+#define RTSubStrategyNumber				24	/* for inet >> */
+#define RTSubEqualStrategyNumber		25	/* for inet <<= */
+#define RTSuperStrategyNumber			26	/* for inet << */
+#define RTSuperEqualStrategyNumber		27	/* for inet >>= */
+#define RTPrefixStrategyNumber			28	/* for text ^@ */
+#define RTOldBelowStrategyNumber		29	/* for old spelling of <<| */
+#define RTOldAboveStrategyNumber		30	/* for old spelling of |>> */
+
+#define RTMaxStrategyNumber				30
+
+
+#endif							/* STRATNUM_H */