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文件: /usr/include/pgsql/server/utils/rangetypes.h
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/*------------------------------------------------------------------------- * * rangetypes.h * Declarations for Postgres range types. * * * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * src/include/utils/rangetypes.h * *------------------------------------------------------------------------- */ #ifndef RANGETYPES_H #define RANGETYPES_H #include "utils/typcache.h" /* * Ranges are varlena objects, so must meet the varlena convention that * the first int32 of the object contains the total object size in bytes. * Be sure to use VARSIZE() and SET_VARSIZE() to access it, though! */ typedef struct { int32 vl_len_; /* varlena header (do not touch directly!) */ Oid rangetypid; /* range type's own OID */ /* Following the OID are zero to two bound values, then a flags byte */ } RangeType; /* Use this macro in preference to fetching rangetypid field directly */ #define RangeTypeGetOid(r) ((r)->rangetypid) /* A range's flags byte contains these bits: */ #define RANGE_EMPTY 0x01 /* range is empty */ #define RANGE_LB_INC 0x02 /* lower bound is inclusive */ #define RANGE_UB_INC 0x04 /* upper bound is inclusive */ #define RANGE_LB_INF 0x08 /* lower bound is -infinity */ #define RANGE_UB_INF 0x10 /* upper bound is +infinity */ #define RANGE_LB_NULL 0x20 /* lower bound is null (NOT USED) */ #define RANGE_UB_NULL 0x40 /* upper bound is null (NOT USED) */ #define RANGE_CONTAIN_EMPTY 0x80/* marks a GiST internal-page entry whose * subtree contains some empty ranges */ #define RANGE_HAS_LBOUND(flags) (!((flags) & (RANGE_EMPTY | \ RANGE_LB_NULL | \ RANGE_LB_INF))) #define RANGE_HAS_UBOUND(flags) (!((flags) & (RANGE_EMPTY | \ RANGE_UB_NULL | \ RANGE_UB_INF))) #define RangeIsEmpty(r) ((range_get_flags(r) & RANGE_EMPTY) != 0) #define RangeIsOrContainsEmpty(r) \ ((range_get_flags(r) & (RANGE_EMPTY | RANGE_CONTAIN_EMPTY)) != 0) /* Internal representation of either bound of a range (not what's on disk) */ typedef struct { Datum val; /* the bound value, if any */ bool infinite; /* bound is +/- infinity */ bool inclusive; /* bound is inclusive (vs exclusive) */ bool lower; /* this is the lower (vs upper) bound */ } RangeBound; /* * fmgr macros for range type objects */ #define DatumGetRangeType(X) ((RangeType *) PG_DETOAST_DATUM(X)) #define DatumGetRangeTypeCopy(X) ((RangeType *) PG_DETOAST_DATUM_COPY(X)) #define RangeTypeGetDatum(X) PointerGetDatum(X) #define PG_GETARG_RANGE(n) DatumGetRangeType(PG_GETARG_DATUM(n)) #define PG_GETARG_RANGE_COPY(n) DatumGetRangeTypeCopy(PG_GETARG_DATUM(n)) #define PG_RETURN_RANGE(x) return RangeTypeGetDatum(x) /* * prototypes for functions defined in rangetypes.c */ /* I/O */ extern Datum range_in(PG_FUNCTION_ARGS); extern Datum range_out(PG_FUNCTION_ARGS); extern Datum range_recv(PG_FUNCTION_ARGS); extern Datum range_send(PG_FUNCTION_ARGS); /* constructors */ extern Datum range_constructor2(PG_FUNCTION_ARGS); extern Datum range_constructor3(PG_FUNCTION_ARGS); /* range -> subtype */ extern Datum range_lower(PG_FUNCTION_ARGS); extern Datum range_upper(PG_FUNCTION_ARGS); /* range -> bool */ extern Datum range_empty(PG_FUNCTION_ARGS); extern Datum range_lower_inc(PG_FUNCTION_ARGS); extern Datum range_upper_inc(PG_FUNCTION_ARGS); extern Datum range_lower_inf(PG_FUNCTION_ARGS); extern Datum range_upper_inf(PG_FUNCTION_ARGS); /* range, element -> bool */ extern Datum range_contains_elem(PG_FUNCTION_ARGS); extern Datum elem_contained_by_range(PG_FUNCTION_ARGS); extern bool range_contains_elem_internal(TypeCacheEntry *typcache, RangeType *r, Datum val); /* range, range -> bool */ extern Datum range_eq(PG_FUNCTION_ARGS); extern Datum range_ne(PG_FUNCTION_ARGS); extern Datum range_contains(PG_FUNCTION_ARGS); extern Datum range_contained_by(PG_FUNCTION_ARGS); extern Datum range_before(PG_FUNCTION_ARGS); extern Datum range_after(PG_FUNCTION_ARGS); extern Datum range_adjacent(PG_FUNCTION_ARGS); extern Datum range_overlaps(PG_FUNCTION_ARGS); extern Datum range_overleft(PG_FUNCTION_ARGS); extern Datum range_overright(PG_FUNCTION_ARGS); /* internal versions of the above */ extern bool range_eq_internal(TypeCacheEntry *typcache, RangeType *r1, RangeType *r2); extern bool range_ne_internal(TypeCacheEntry *typcache, RangeType *r1, RangeType *r2); extern bool range_contains_internal(TypeCacheEntry *typcache, RangeType *r1, RangeType *r2); extern bool range_contained_by_internal(TypeCacheEntry *typcache, RangeType *r1, RangeType *r2); extern bool range_before_internal(TypeCacheEntry *typcache, RangeType *r1, RangeType *r2); extern bool range_after_internal(TypeCacheEntry *typcache, RangeType *r1, RangeType *r2); extern bool range_adjacent_internal(TypeCacheEntry *typcache, RangeType *r1, RangeType *r2); extern bool range_overlaps_internal(TypeCacheEntry *typcache, RangeType *r1, RangeType *r2); extern bool range_overleft_internal(TypeCacheEntry *typcache, RangeType *r1, RangeType *r2); extern bool range_overright_internal(TypeCacheEntry *typcache, RangeType *r1, RangeType *r2); /* range, range -> range */ extern Datum range_minus(PG_FUNCTION_ARGS); extern Datum range_union(PG_FUNCTION_ARGS); extern Datum range_intersect(PG_FUNCTION_ARGS); /* BTree support */ extern Datum range_cmp(PG_FUNCTION_ARGS); extern Datum range_lt(PG_FUNCTION_ARGS); extern Datum range_le(PG_FUNCTION_ARGS); extern Datum range_ge(PG_FUNCTION_ARGS); extern Datum range_gt(PG_FUNCTION_ARGS); /* Hash support */ extern Datum hash_range(PG_FUNCTION_ARGS); /* ANALYZE support */ extern Datum range_typanalyze(PG_FUNCTION_ARGS); /* Canonical functions */ extern Datum int4range_canonical(PG_FUNCTION_ARGS); extern Datum int8range_canonical(PG_FUNCTION_ARGS); extern Datum daterange_canonical(PG_FUNCTION_ARGS); /* Subtype Difference functions */ extern Datum int4range_subdiff(PG_FUNCTION_ARGS); extern Datum int8range_subdiff(PG_FUNCTION_ARGS); extern Datum numrange_subdiff(PG_FUNCTION_ARGS); extern Datum daterange_subdiff(PG_FUNCTION_ARGS); extern Datum tsrange_subdiff(PG_FUNCTION_ARGS); extern Datum tstzrange_subdiff(PG_FUNCTION_ARGS); /* assorted support functions */ extern TypeCacheEntry *range_get_typcache(FunctionCallInfo fcinfo, Oid rngtypid); extern RangeType *range_serialize(TypeCacheEntry *typcache, RangeBound *lower, RangeBound *upper, bool empty); extern void range_deserialize(TypeCacheEntry *typcache, RangeType *range, RangeBound *lower, RangeBound *upper, bool *empty); extern char range_get_flags(RangeType *range); extern void range_set_contain_empty(RangeType *range); extern RangeType *make_range(TypeCacheEntry *typcache, RangeBound *lower, RangeBound *upper, bool empty); extern int range_cmp_bounds(TypeCacheEntry *typcache, RangeBound *b1, RangeBound *b2); extern int range_cmp_bound_values(TypeCacheEntry *typcache, RangeBound *b1, RangeBound *b2); extern RangeType *make_empty_range(TypeCacheEntry *typcache); /* GiST support (in rangetypes_gist.c) */ extern Datum range_gist_consistent(PG_FUNCTION_ARGS); extern Datum range_gist_compress(PG_FUNCTION_ARGS); extern Datum range_gist_decompress(PG_FUNCTION_ARGS); extern Datum range_gist_union(PG_FUNCTION_ARGS); extern Datum range_gist_penalty(PG_FUNCTION_ARGS); extern Datum range_gist_picksplit(PG_FUNCTION_ARGS); extern Datum range_gist_same(PG_FUNCTION_ARGS); #endif /* RANGETYPES_H */
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