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52ad1e6599
This commit refactors come ridiculous coding in compareDatetime(). Also, it provides correct cross-datatype comparison even when one of values overflows during cast. That eliminates dilemma on whether we should suppress overflow errors during cast. Reported-by: Tom Lane Discussion: https://postgr.es/m/32308.1569455803%40sss.pgh.pa.us Discussion: https://postgr.es/m/a5629d0c-8162-7559-16aa-0c8390d6ba5f%40postgrespro.ru Author: Nikita Glukhov, Alexander Korotkov
86 lines
2.9 KiB
C
86 lines
2.9 KiB
C
/*-------------------------------------------------------------------------
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*
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* date.h
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* Definitions for the SQL "date" and "time" types.
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*
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*
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* Portions Copyright (c) 1996-2019, 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/utils/date.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef DATE_H
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#define DATE_H
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#include <math.h>
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#include "fmgr.h"
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#include "pgtime.h"
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#include "datatype/timestamp.h"
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typedef int32 DateADT;
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typedef int64 TimeADT;
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typedef struct
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{
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TimeADT time; /* all time units other than months and years */
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int32 zone; /* numeric time zone, in seconds */
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} TimeTzADT;
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/*
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* Infinity and minus infinity must be the max and min values of DateADT.
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*/
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#define DATEVAL_NOBEGIN ((DateADT) PG_INT32_MIN)
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#define DATEVAL_NOEND ((DateADT) PG_INT32_MAX)
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#define DATE_NOBEGIN(j) ((j) = DATEVAL_NOBEGIN)
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#define DATE_IS_NOBEGIN(j) ((j) == DATEVAL_NOBEGIN)
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#define DATE_NOEND(j) ((j) = DATEVAL_NOEND)
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#define DATE_IS_NOEND(j) ((j) == DATEVAL_NOEND)
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#define DATE_NOT_FINITE(j) (DATE_IS_NOBEGIN(j) || DATE_IS_NOEND(j))
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/*
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* Macros for fmgr-callable functions.
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*
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* For TimeADT, we make use of the same support routines as for int64.
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* Therefore TimeADT is pass-by-reference if and only if int64 is!
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*/
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#define MAX_TIME_PRECISION 6
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#define DatumGetDateADT(X) ((DateADT) DatumGetInt32(X))
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#define DatumGetTimeADT(X) ((TimeADT) DatumGetInt64(X))
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#define DatumGetTimeTzADTP(X) ((TimeTzADT *) DatumGetPointer(X))
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#define DateADTGetDatum(X) Int32GetDatum(X)
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#define TimeADTGetDatum(X) Int64GetDatum(X)
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#define TimeTzADTPGetDatum(X) PointerGetDatum(X)
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#define PG_GETARG_DATEADT(n) DatumGetDateADT(PG_GETARG_DATUM(n))
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#define PG_GETARG_TIMEADT(n) DatumGetTimeADT(PG_GETARG_DATUM(n))
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#define PG_GETARG_TIMETZADT_P(n) DatumGetTimeTzADTP(PG_GETARG_DATUM(n))
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#define PG_RETURN_DATEADT(x) return DateADTGetDatum(x)
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#define PG_RETURN_TIMEADT(x) return TimeADTGetDatum(x)
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#define PG_RETURN_TIMETZADT_P(x) return TimeTzADTPGetDatum(x)
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/* date.c */
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extern int32 anytime_typmod_check(bool istz, int32 typmod);
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extern double date2timestamp_no_overflow(DateADT dateVal);
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extern Timestamp date2timestamp_opt_overflow(DateADT dateVal, int *overflow);
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extern TimestampTz date2timestamptz_opt_overflow(DateADT dateVal, int *overflow);
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extern void EncodeSpecialDate(DateADT dt, char *str);
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extern DateADT GetSQLCurrentDate(void);
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extern TimeTzADT *GetSQLCurrentTime(int32 typmod);
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extern TimeADT GetSQLLocalTime(int32 typmod);
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extern int time2tm(TimeADT time, struct pg_tm *tm, fsec_t *fsec);
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extern int timetz2tm(TimeTzADT *time, struct pg_tm *tm, fsec_t *fsec, int *tzp);
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extern int tm2time(struct pg_tm *tm, fsec_t fsec, TimeADT *result);
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extern int tm2timetz(struct pg_tm *tm, fsec_t fsec, int tz, TimeTzADT *result);
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extern void AdjustTimeForTypmod(TimeADT *time, int32 typmod);
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#endif /* DATE_H */
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