diff options
Diffstat (limited to 'src/include/utils/rangetypes.h')
| -rw-r--r-- | src/include/utils/rangetypes.h | 69 |
1 files changed, 42 insertions, 27 deletions
diff --git a/src/include/utils/rangetypes.h b/src/include/utils/rangetypes.h index e218a91d1a8..585d32134c0 100644 --- a/src/include/utils/rangetypes.h +++ b/src/include/utils/rangetypes.h @@ -14,37 +14,51 @@ #ifndef RANGETYPES_H #define RANGETYPES_H -#include "fmgr.h" +#include "utils/typcache.h" -/* All ranges are represented as varlena objects */ -typedef struct varlena RangeType; +/* + * 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 (vs exclusive) */ +#define RANGE_LB_NULL 0x04 /* lower bound is null (NOT CURRENTLY USED) */ +#define RANGE_LB_INF 0x08 /* lower bound is +/- infinity */ +#define RANGE_UB_INC 0x10 /* upper bound is inclusive (vs exclusive) */ +#define RANGE_UB_NULL 0x20 /* upper bound is null (NOT CURRENTLY USED) */ +#define RANGE_UB_INF 0x40 /* upper bound is +/- infinity */ + +#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))) + /* Internal representation of either bound of a range (not what's on disk) */ typedef struct { Datum val; /* the bound value, if any */ - Oid rngtypid; /* OID of the range type itself */ bool infinite; /* bound is +/- infinity */ - bool lower; /* this is the lower (vs upper) bound */ bool inclusive; /* bound is inclusive (vs exclusive) */ + bool lower; /* this is the lower (vs upper) bound */ } RangeBound; -/* Standard runtime-cached data for a range type */ -typedef struct -{ - FmgrInfo canonicalFn; /* canonicalization function, if any */ - FmgrInfo cmpFn; /* element type's btree comparison function */ - FmgrInfo subdiffFn; /* element type difference function, if any */ - Oid rngtypid; /* OID of the range type itself */ - Oid subtype; /* OID of the element type */ - Oid collation; /* collation for comparisons, if any */ - int16 subtyplen; /* typlen of element type */ - char subtypalign; /* typalign of element type */ - char subtypstorage; /* typstorage of element type */ - bool subtypbyval; /* typbyval of element type */ -} RangeTypeInfo; - /* * fmgr macros for range type objects */ @@ -129,18 +143,19 @@ extern Datum tsrange_subdiff(PG_FUNCTION_ARGS); extern Datum tstzrange_subdiff(PG_FUNCTION_ARGS); /* assorted support functions */ -extern Datum range_serialize(FunctionCallInfo fcinfo, RangeBound *lower, +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(FunctionCallInfo fcinfo, RangeType *range, +extern void range_deserialize(TypeCacheEntry *typcache, RangeType *range, RangeBound *lower, RangeBound *upper, bool *empty); -extern Datum make_range(FunctionCallInfo fcinfo, RangeBound *lower, +extern char range_get_flags(RangeType *range); +extern RangeType *make_range(TypeCacheEntry *typcache, RangeBound *lower, RangeBound *upper, bool empty); -extern int range_cmp_bounds(FunctionCallInfo fcinfo, RangeBound *b1, +extern int range_cmp_bounds(TypeCacheEntry *typcache, RangeBound *b1, RangeBound *b2); -extern RangeType *make_empty_range(FunctionCallInfo fcinfo, Oid rngtypid); -extern void range_gettypinfo(FunctionCallInfo fcinfo, Oid rngtypid, - RangeTypeInfo *rngtypinfo); +extern RangeType *make_empty_range(TypeCacheEntry *typcache); /* GiST support (in rangetypes_gist.c) */ extern Datum range_gist_consistent(PG_FUNCTION_ARGS); |