86 lines
3.0 KiB
C
86 lines
3.0 KiB
C
/*-------------------------------------------------------------------------
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*
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* stratnum.h
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* POSTGRES strategy number definitions.
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*
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*
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* Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/access/stratnum.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef STRATNUM_H
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#define STRATNUM_H
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/*
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* Strategy numbers identify the semantics that particular operators have
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* with respect to particular operator classes. In some cases a strategy
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* subtype (an OID) is used as further information.
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*/
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typedef uint16 StrategyNumber;
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#define InvalidStrategy ((StrategyNumber) 0)
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/*
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* Strategy numbers for B-tree indexes.
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*/
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#define BTLessStrategyNumber 1
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#define BTLessEqualStrategyNumber 2
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#define BTEqualStrategyNumber 3
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#define BTGreaterEqualStrategyNumber 4
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#define BTGreaterStrategyNumber 5
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#define BTMaxStrategyNumber 5
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/*
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* Strategy numbers for hash indexes. There's only one valid strategy for
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* hashing: equality.
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*/
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#define HTEqualStrategyNumber 1
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#define HTMaxStrategyNumber 1
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/*
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* Strategy numbers common to (some) GiST, SP-GiST and BRIN opclasses.
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*
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* The first few of these come from the R-Tree indexing method (hence the
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* names); the others have been added over time as they have been needed.
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*/
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#define RTLeftStrategyNumber 1 /* for << */
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#define RTOverLeftStrategyNumber 2 /* for &< */
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#define RTOverlapStrategyNumber 3 /* for && */
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#define RTOverRightStrategyNumber 4 /* for &> */
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#define RTRightStrategyNumber 5 /* for >> */
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#define RTSameStrategyNumber 6 /* for ~= */
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#define RTContainsStrategyNumber 7 /* for @> */
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#define RTContainedByStrategyNumber 8 /* for <@ */
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#define RTOverBelowStrategyNumber 9 /* for &<| */
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#define RTBelowStrategyNumber 10 /* for <<| */
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#define RTAboveStrategyNumber 11 /* for |>> */
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#define RTOverAboveStrategyNumber 12 /* for |&> */
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#define RTOldContainsStrategyNumber 13 /* for old spelling of @> */
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#define RTOldContainedByStrategyNumber 14 /* for old spelling of <@ */
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#define RTKNNSearchStrategyNumber 15 /* for <-> (distance) */
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#define RTContainsElemStrategyNumber 16 /* for range types @> elem */
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#define RTAdjacentStrategyNumber 17 /* for -|- */
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#define RTEqualStrategyNumber 18 /* for = */
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#define RTNotEqualStrategyNumber 19 /* for != */
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#define RTLessStrategyNumber 20 /* for < */
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#define RTLessEqualStrategyNumber 21 /* for <= */
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#define RTGreaterStrategyNumber 22 /* for > */
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#define RTGreaterEqualStrategyNumber 23 /* for >= */
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#define RTSubStrategyNumber 24 /* for inet >> */
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#define RTSubEqualStrategyNumber 25 /* for inet <<= */
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#define RTSuperStrategyNumber 26 /* for inet << */
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#define RTSuperEqualStrategyNumber 27 /* for inet >>= */
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#define RTPrefixStrategyNumber 28 /* for text ^@ */
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#define RTOldBelowStrategyNumber 29 /* for old spelling of <<| */
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#define RTOldAboveStrategyNumber 30 /* for old spelling of |>> */
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#define RTMaxStrategyNumber 30
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#endif /* STRATNUM_H */
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