mirror of https://github.com/postgres/postgres
For upcoming BRIN opclasses, it's convenient to have strategy numbers defined in a single place. Since there's nothing appropriate, create it. The StrategyNumber typedef now lives there, as well as existing strategy numbers for B-trees (from skey.h) and R-tree-and-friends (from gist.h). skey.h is forced to include stratnum.h because of the StrategyNumber typedef, but gist.h is not; extensions that currently rely on gist.h for rtree strategy numbers might need to add a new A few .c files can stop including skey.h and/or gist.h, which is a nice side benefit. Per discussion: https://www.postgresql.org/message-id/20150514232132.GZ2523@alvh.no-ip.org Authored by Emre Hasegeli and Álvaro. (It's not clear to me why bootscanner.l has any #include lines at all.)pull/14/head
Alvaro Herrera
10 years ago
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/*-------------------------------------------------------------------------
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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) 1996-2015, 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 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 RTSubOrEqualStrategyNumber 25 /* for inet <<= */ |
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#define RTSuperStrategyNumber 26 /* for inet << */ |
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#define RTSuperOrEqualStrategyNumber 27 /* for inet >>= */ |
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#define RTMaxStrategyNumber 27 |
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#endif /* STRATNUM_H */ |
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