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postgresql/src/backend/utils/adt/date.c

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/*-------------------------------------------------------------------------
*
* date.c
* implements DATE and TIME data types specified in SQL-92 standard
*
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994-5, Regents of the University of California
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/date.c,v 1.97 2004/05/21 05:08:01 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include <ctype.h>
#include <limits.h>
#include <float.h>
#include "access/hash.h"
#include "libpq/pqformat.h"
#include "miscadmin.h"
#include "parser/scansup.h"
#include "pgtime.h"
#include "utils/builtins.h"
#include "utils/date.h"
#include "utils/nabstime.h"
#include "utils/timestamp.h"
/*
* gcc's -ffast-math switch breaks routines that expect exact results from
* expressions like timeval / 3600, where timeval is double.
*/
#ifdef __FAST_MATH__
#error -ffast-math is known to break this code
#endif
static int time2tm(TimeADT time, struct pg_tm * tm, fsec_t *fsec);
static int timetz2tm(TimeTzADT *time, struct pg_tm * tm, fsec_t *fsec, int *tzp);
static int tm2time(struct pg_tm * tm, fsec_t fsec, TimeADT *result);
static int tm2timetz(struct pg_tm * tm, fsec_t fsec, int tz, TimeTzADT *result);
static void AdjustTimeForTypmod(TimeADT *time, int32 typmod);
/*****************************************************************************
* Date ADT
*****************************************************************************/
/* date_in()
* Given date text string, convert to internal date format.
*/
Datum
date_in(PG_FUNCTION_ARGS)
{
char *str = PG_GETARG_CSTRING(0);
DateADT date;
fsec_t fsec;
struct pg_tm tt,
*tm = &tt;
int tzp;
int dtype;
int nf;
int dterr;
char *field[MAXDATEFIELDS];
int ftype[MAXDATEFIELDS];
char lowstr[MAXDATELEN + 1];
if (strlen(str) >= sizeof(lowstr))
dterr = DTERR_BAD_FORMAT;
else
dterr = ParseDateTime(str, lowstr, field, ftype, MAXDATEFIELDS, &nf);
if (dterr == 0)
dterr = DecodeDateTime(field, ftype, nf, &dtype, tm, &fsec, &tzp);
if (dterr != 0)
DateTimeParseError(dterr, str, "date");
switch (dtype)
{
case DTK_DATE:
break;
case DTK_CURRENT:
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("date/time value \"current\" is no longer supported")));
GetCurrentDateTime(tm);
break;
case DTK_EPOCH:
GetEpochTime(tm);
break;
default:
DateTimeParseError(DTERR_BAD_FORMAT, str, "date");
break;
}
date = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - POSTGRES_EPOCH_JDATE;
PG_RETURN_DATEADT(date);
}
/* date_out()
* Given internal format date, convert to text string.
*/
Datum
date_out(PG_FUNCTION_ARGS)
{
DateADT date = PG_GETARG_DATEADT(0);
char *result;
struct pg_tm tt,
*tm = &tt;
char buf[MAXDATELEN + 1];
j2date(date + POSTGRES_EPOCH_JDATE,
&(tm->tm_year), &(tm->tm_mon), &(tm->tm_mday));
EncodeDateOnly(tm, DateStyle, buf);
result = pstrdup(buf);
PG_RETURN_CSTRING(result);
}
/*
* date_recv - converts external binary format to date
*/
Datum
date_recv(PG_FUNCTION_ARGS)
{
StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
PG_RETURN_DATEADT((DateADT) pq_getmsgint(buf, sizeof(DateADT)));
}
/*
* date_send - converts date to binary format
*/
Datum
date_send(PG_FUNCTION_ARGS)
{
DateADT date = PG_GETARG_DATEADT(0);
StringInfoData buf;
pq_begintypsend(&buf);
pq_sendint(&buf, date, sizeof(date));
PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
}
/*
* Comparison functions for dates
*/
Datum
date_eq(PG_FUNCTION_ARGS)
{
DateADT dateVal1 = PG_GETARG_DATEADT(0);
DateADT dateVal2 = PG_GETARG_DATEADT(1);
PG_RETURN_BOOL(dateVal1 == dateVal2);
}
Datum
date_ne(PG_FUNCTION_ARGS)
{
DateADT dateVal1 = PG_GETARG_DATEADT(0);
DateADT dateVal2 = PG_GETARG_DATEADT(1);
PG_RETURN_BOOL(dateVal1 != dateVal2);
}
Datum
date_lt(PG_FUNCTION_ARGS)
{
DateADT dateVal1 = PG_GETARG_DATEADT(0);
DateADT dateVal2 = PG_GETARG_DATEADT(1);
PG_RETURN_BOOL(dateVal1 < dateVal2);
}
Datum
date_le(PG_FUNCTION_ARGS)
{
DateADT dateVal1 = PG_GETARG_DATEADT(0);
DateADT dateVal2 = PG_GETARG_DATEADT(1);
PG_RETURN_BOOL(dateVal1 <= dateVal2);
}
Datum
date_gt(PG_FUNCTION_ARGS)
{
DateADT dateVal1 = PG_GETARG_DATEADT(0);
DateADT dateVal2 = PG_GETARG_DATEADT(1);
PG_RETURN_BOOL(dateVal1 > dateVal2);
}
Datum
date_ge(PG_FUNCTION_ARGS)
{
DateADT dateVal1 = PG_GETARG_DATEADT(0);
DateADT dateVal2 = PG_GETARG_DATEADT(1);
PG_RETURN_BOOL(dateVal1 >= dateVal2);
}
Datum
date_cmp(PG_FUNCTION_ARGS)
{
DateADT dateVal1 = PG_GETARG_DATEADT(0);
DateADT dateVal2 = PG_GETARG_DATEADT(1);
if (dateVal1 < dateVal2)
PG_RETURN_INT32(-1);
else if (dateVal1 > dateVal2)
PG_RETURN_INT32(1);
PG_RETURN_INT32(0);
}
Datum
date_larger(PG_FUNCTION_ARGS)
{
DateADT dateVal1 = PG_GETARG_DATEADT(0);
DateADT dateVal2 = PG_GETARG_DATEADT(1);
PG_RETURN_DATEADT((dateVal1 > dateVal2) ? dateVal1 : dateVal2);
}
Datum
date_smaller(PG_FUNCTION_ARGS)
{
DateADT dateVal1 = PG_GETARG_DATEADT(0);
DateADT dateVal2 = PG_GETARG_DATEADT(1);
PG_RETURN_DATEADT((dateVal1 < dateVal2) ? dateVal1 : dateVal2);
}
/* Compute difference between two dates in days.
*/
Datum
date_mi(PG_FUNCTION_ARGS)
{
DateADT dateVal1 = PG_GETARG_DATEADT(0);
DateADT dateVal2 = PG_GETARG_DATEADT(1);
PG_RETURN_INT32((int32) (dateVal1 - dateVal2));
}
/* Add a number of days to a date, giving a new date.
* Must handle both positive and negative numbers of days.
*/
Datum
date_pli(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
int32 days = PG_GETARG_INT32(1);
PG_RETURN_DATEADT(dateVal + days);
}
/* Subtract a number of days from a date, giving a new date.
*/
Datum
date_mii(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
int32 days = PG_GETARG_INT32(1);
PG_RETURN_DATEADT(dateVal - days);
}
/*
* Internal routines for promoting date to timestamp and timestamp with
* time zone
*/
#ifdef HAVE_INT64_TIMESTAMP
/* date is days since 2000, timestamp is microseconds since same... */
#define date2timestamp(dateVal) \
((Timestamp) ((dateVal) * INT64CONST(86400000000)))
#else
/* date is days since 2000, timestamp is seconds since same... */
#define date2timestamp(dateVal) \
((Timestamp) ((dateVal) * 86400.0))
#endif
static TimestampTz
date2timestamptz(DateADT dateVal)
{
TimestampTz result;
struct pg_tm tt,
*tm = &tt;
j2date(dateVal + POSTGRES_EPOCH_JDATE,
&(tm->tm_year), &(tm->tm_mon), &(tm->tm_mday));
if (IS_VALID_UTIME(tm->tm_year, tm->tm_mon, tm->tm_mday))
{
int tz;
tm->tm_hour = 0;
tm->tm_min = 0;
tm->tm_sec = 0;
tz = DetermineLocalTimeZone(tm);
#ifdef HAVE_INT64_TIMESTAMP
result = (dateVal * INT64CONST(86400000000))
+ (tz * INT64CONST(1000000));
#else
result = dateVal * 86400.0 + tz;
#endif
}
else
{
/* Outside of range for timezone support, so assume UTC */
#ifdef HAVE_INT64_TIMESTAMP
result = (dateVal * INT64CONST(86400000000));
#else
result = dateVal * 86400.0;
#endif
}
return result;
}
/*
* Crosstype comparison functions for dates
*/
Datum
date_eq_timestamp(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
Timestamp dt1;
dt1 = date2timestamp(dateVal);
PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) == 0);
}
Datum
date_ne_timestamp(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
Timestamp dt1;
dt1 = date2timestamp(dateVal);
PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) != 0);
}
Datum
date_lt_timestamp(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
Timestamp dt1;
dt1 = date2timestamp(dateVal);
PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) < 0);
}
Datum
date_gt_timestamp(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
Timestamp dt1;
dt1 = date2timestamp(dateVal);
PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) > 0);
}
Datum
date_le_timestamp(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
Timestamp dt1;
dt1 = date2timestamp(dateVal);
PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) <= 0);
}
Datum
date_ge_timestamp(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
Timestamp dt1;
dt1 = date2timestamp(dateVal);
PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) >= 0);
}
Datum
date_cmp_timestamp(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
Timestamp dt1;
dt1 = date2timestamp(dateVal);
PG_RETURN_INT32(timestamp_cmp_internal(dt1, dt2));
}
Datum
date_eq_timestamptz(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1);
TimestampTz dt1;
dt1 = date2timestamptz(dateVal);
PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) == 0);
}
Datum
date_ne_timestamptz(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1);
TimestampTz dt1;
dt1 = date2timestamptz(dateVal);
PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) != 0);
}
Datum
date_lt_timestamptz(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1);
TimestampTz dt1;
dt1 = date2timestamptz(dateVal);
PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) < 0);
}
Datum
date_gt_timestamptz(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1);
TimestampTz dt1;
dt1 = date2timestamptz(dateVal);
PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) > 0);
}
Datum
date_le_timestamptz(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1);
TimestampTz dt1;
dt1 = date2timestamptz(dateVal);
PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) <= 0);
}
Datum
date_ge_timestamptz(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1);
TimestampTz dt1;
dt1 = date2timestamptz(dateVal);
PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) >= 0);
}
Datum
date_cmp_timestamptz(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1);
TimestampTz dt1;
dt1 = date2timestamptz(dateVal);
PG_RETURN_INT32(timestamptz_cmp_internal(dt1, dt2));
}
Datum
timestamp_eq_date(PG_FUNCTION_ARGS)
{
Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
DateADT dateVal = PG_GETARG_DATEADT(1);
Timestamp dt2;
dt2 = date2timestamp(dateVal);
PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) == 0);
}
Datum
timestamp_ne_date(PG_FUNCTION_ARGS)
{
Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
DateADT dateVal = PG_GETARG_DATEADT(1);
Timestamp dt2;
dt2 = date2timestamp(dateVal);
PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) != 0);
}
Datum
timestamp_lt_date(PG_FUNCTION_ARGS)
{
Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
DateADT dateVal = PG_GETARG_DATEADT(1);
Timestamp dt2;
dt2 = date2timestamp(dateVal);
PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) < 0);
}
Datum
timestamp_gt_date(PG_FUNCTION_ARGS)
{
Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
DateADT dateVal = PG_GETARG_DATEADT(1);
Timestamp dt2;
dt2 = date2timestamp(dateVal);
PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) > 0);
}
Datum
timestamp_le_date(PG_FUNCTION_ARGS)
{
Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
DateADT dateVal = PG_GETARG_DATEADT(1);
Timestamp dt2;
dt2 = date2timestamp(dateVal);
PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) <= 0);
}
Datum
timestamp_ge_date(PG_FUNCTION_ARGS)
{
Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
DateADT dateVal = PG_GETARG_DATEADT(1);
Timestamp dt2;
dt2 = date2timestamp(dateVal);
PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) >= 0);
}
Datum
timestamp_cmp_date(PG_FUNCTION_ARGS)
{
Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
DateADT dateVal = PG_GETARG_DATEADT(1);
Timestamp dt2;
dt2 = date2timestamp(dateVal);
PG_RETURN_INT32(timestamp_cmp_internal(dt1, dt2));
}
Datum
timestamptz_eq_date(PG_FUNCTION_ARGS)
{
TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0);
DateADT dateVal = PG_GETARG_DATEADT(1);
TimestampTz dt2;
dt2 = date2timestamptz(dateVal);
PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) == 0);
}
Datum
timestamptz_ne_date(PG_FUNCTION_ARGS)
{
TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0);
DateADT dateVal = PG_GETARG_DATEADT(1);
TimestampTz dt2;
dt2 = date2timestamptz(dateVal);
PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) != 0);
}
Datum
timestamptz_lt_date(PG_FUNCTION_ARGS)
{
TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0);
DateADT dateVal = PG_GETARG_DATEADT(1);
TimestampTz dt2;
dt2 = date2timestamptz(dateVal);
PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) < 0);
}
Datum
timestamptz_gt_date(PG_FUNCTION_ARGS)
{
TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0);
DateADT dateVal = PG_GETARG_DATEADT(1);
TimestampTz dt2;
dt2 = date2timestamptz(dateVal);
PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) > 0);
}
Datum
timestamptz_le_date(PG_FUNCTION_ARGS)
{
TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0);
DateADT dateVal = PG_GETARG_DATEADT(1);
TimestampTz dt2;
dt2 = date2timestamptz(dateVal);
PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) <= 0);
}
Datum
timestamptz_ge_date(PG_FUNCTION_ARGS)
{
TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0);
DateADT dateVal = PG_GETARG_DATEADT(1);
TimestampTz dt2;
dt2 = date2timestamptz(dateVal);
PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) >= 0);
}
Datum
timestamptz_cmp_date(PG_FUNCTION_ARGS)
{
TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0);
DateADT dateVal = PG_GETARG_DATEADT(1);
TimestampTz dt2;
dt2 = date2timestamptz(dateVal);
PG_RETURN_INT32(timestamptz_cmp_internal(dt1, dt2));
}
/* Add an interval to a date, giving a new date.
* Must handle both positive and negative intervals.
*
* We implement this by promoting the date to timestamp (without time zone)
* and then using the timestamp plus interval function.
*/
Datum
date_pl_interval(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
Interval *span = PG_GETARG_INTERVAL_P(1);
Timestamp dateStamp;
dateStamp = date2timestamp(dateVal);
return DirectFunctionCall2(timestamp_pl_interval,
TimestampGetDatum(dateStamp),
PointerGetDatum(span));
}
/* Subtract an interval from a date, giving a new date.
* Must handle both positive and negative intervals.
*
* We implement this by promoting the date to timestamp (without time zone)
* and then using the timestamp minus interval function.
*/
Datum
date_mi_interval(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
Interval *span = PG_GETARG_INTERVAL_P(1);
Timestamp dateStamp;
dateStamp = date2timestamp(dateVal);
return DirectFunctionCall2(timestamp_mi_interval,
TimestampGetDatum(dateStamp),
PointerGetDatum(span));
}
/* date_timestamp()
* Convert date to timestamp data type.
*/
Datum
date_timestamp(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
Timestamp result;
result = date2timestamp(dateVal);
PG_RETURN_TIMESTAMP(result);
}
/* timestamp_date()
* Convert timestamp to date data type.
*/
Datum
timestamp_date(PG_FUNCTION_ARGS)
{
Timestamp timestamp = PG_GETARG_TIMESTAMP(0);
DateADT result;
struct pg_tm tt,
*tm = &tt;
fsec_t fsec;
if (TIMESTAMP_NOT_FINITE(timestamp))
PG_RETURN_NULL();
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL) != 0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
result = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - POSTGRES_EPOCH_JDATE;
PG_RETURN_DATEADT(result);
}
/* date_timestamptz()
* Convert date to timestamp with time zone data type.
*/
Datum
date_timestamptz(PG_FUNCTION_ARGS)
{
DateADT dateVal = PG_GETARG_DATEADT(0);
TimestampTz result;
result = date2timestamptz(dateVal);
PG_RETURN_TIMESTAMP(result);
}
/* timestamptz_date()
* Convert timestamp with time zone to date data type.
*/
Datum
timestamptz_date(PG_FUNCTION_ARGS)
{
TimestampTz timestamp = PG_GETARG_TIMESTAMP(0);
DateADT result;
struct pg_tm tt,
*tm = &tt;
fsec_t fsec;
int tz;
char *tzn;
if (TIMESTAMP_NOT_FINITE(timestamp))
PG_RETURN_NULL();
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn) != 0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
result = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - POSTGRES_EPOCH_JDATE;
PG_RETURN_DATEADT(result);
}
/* abstime_date()
* Convert abstime to date data type.
*/
Datum
abstime_date(PG_FUNCTION_ARGS)
{
AbsoluteTime abstime = PG_GETARG_ABSOLUTETIME(0);
DateADT result;
struct pg_tm tt,
*tm = &tt;
int tz;
switch (abstime)
{
case INVALID_ABSTIME:
case NOSTART_ABSTIME:
case NOEND_ABSTIME:
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot convert reserved abstime value to date")));
/*
* pretend to drop through to make compiler think that result
* will be set
*/
default:
abstime2tm(abstime, &tz, tm, NULL);
result = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - POSTGRES_EPOCH_JDATE;
break;
}
PG_RETURN_DATEADT(result);
}
/* date_text()
* Convert date to text data type.
*/
Datum
date_text(PG_FUNCTION_ARGS)
{
/* Input is a Date, but may as well leave it in Datum form */
Datum date = PG_GETARG_DATUM(0);
text *result;
char *str;
int len;
str = DatumGetCString(DirectFunctionCall1(date_out, date));
len = (strlen(str) + VARHDRSZ);
result = palloc(len);
VARATT_SIZEP(result) = len;
memmove(VARDATA(result), str, (len - VARHDRSZ));
pfree(str);
PG_RETURN_TEXT_P(result);
}
/* text_date()
* Convert text string to date.
* Text type is not null terminated, so use temporary string
* then call the standard input routine.
*/
Datum
text_date(PG_FUNCTION_ARGS)
{
text *str = PG_GETARG_TEXT_P(0);
int i;
char *sp,
*dp,
dstr[MAXDATELEN + 1];
if (VARSIZE(str) - VARHDRSZ > MAXDATELEN)
ereport(ERROR,
(errcode(ERRCODE_INVALID_DATETIME_FORMAT),
errmsg("invalid input syntax for type date: \"%s\"",
VARDATA(str))));
sp = VARDATA(str);
dp = dstr;
for (i = 0; i < (VARSIZE(str) - VARHDRSZ); i++)
*dp++ = *sp++;
*dp = '\0';
return DirectFunctionCall1(date_in,
CStringGetDatum(dstr));
}
/*****************************************************************************
* Time ADT
*****************************************************************************/
Datum
time_in(PG_FUNCTION_ARGS)
{
char *str = PG_GETARG_CSTRING(0);
#ifdef NOT_USED
Oid typelem = PG_GETARG_OID(1);
#endif
int32 typmod = PG_GETARG_INT32(2);
TimeADT result;
fsec_t fsec;
struct pg_tm tt,
*tm = &tt;
int tz;
int nf;
int dterr;
char lowstr[MAXDATELEN + 1];
char *field[MAXDATEFIELDS];
int dtype;
int ftype[MAXDATEFIELDS];
if (strlen(str) >= sizeof(lowstr))
dterr = DTERR_BAD_FORMAT;
else
dterr = ParseDateTime(str, lowstr, field, ftype, MAXDATEFIELDS, &nf);
if (dterr == 0)
dterr = DecodeTimeOnly(field, ftype, nf, &dtype, tm, &fsec, &tz);
if (dterr != 0)
DateTimeParseError(dterr, str, "time");
tm2time(tm, fsec, &result);
AdjustTimeForTypmod(&result, typmod);
PG_RETURN_TIMEADT(result);
}
/* tm2time()
* Convert a tm structure to a time data type.
*/
static int
tm2time(struct pg_tm * tm, fsec_t fsec, TimeADT *result)
{
#ifdef HAVE_INT64_TIMESTAMP
*result = ((((((tm->tm_hour * 60) + tm->tm_min) * 60) + tm->tm_sec)
* INT64CONST(1000000)) + fsec);
#else
*result = ((((tm->tm_hour * 60) + tm->tm_min) * 60) + tm->tm_sec + fsec);
#endif
return 0;
}
/* time2tm()
* Convert time data type to POSIX time structure.
* For dates within the system-supported time_t range, convert to the
* local time zone. If out of this range, leave as GMT. - tgl 97/05/27
*/
static int
time2tm(TimeADT time, struct pg_tm * tm, fsec_t *fsec)
{
#ifdef HAVE_INT64_TIMESTAMP
tm->tm_hour = (time / INT64CONST(3600000000));
time -= (tm->tm_hour * INT64CONST(3600000000));
tm->tm_min = (time / INT64CONST(60000000));
time -= (tm->tm_min * INT64CONST(60000000));
tm->tm_sec = (time / INT64CONST(1000000));
time -= (tm->tm_sec * INT64CONST(1000000));
*fsec = time;
#else
double trem;
trem = time;
TMODULO(trem, tm->tm_hour, 3600e0);
TMODULO(trem, tm->tm_min, 60e0);
TMODULO(trem, tm->tm_sec, 1e0);
*fsec = trem;
#endif
return 0;
}
Datum
time_out(PG_FUNCTION_ARGS)
{
TimeADT time = PG_GETARG_TIMEADT(0);
char *result;
struct pg_tm tt,
*tm = &tt;
fsec_t fsec;
char buf[MAXDATELEN + 1];
time2tm(time, tm, &fsec);
EncodeTimeOnly(tm, fsec, NULL, DateStyle, buf);
result = pstrdup(buf);
PG_RETURN_CSTRING(result);
}
/*
* time_recv - converts external binary format to time
*
* We make no attempt to provide compatibility between int and float
* time representations ...
*/
Datum
time_recv(PG_FUNCTION_ARGS)
{
StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
#ifdef HAVE_INT64_TIMESTAMP
PG_RETURN_TIMEADT((TimeADT) pq_getmsgint64(buf));
#else
PG_RETURN_TIMEADT((TimeADT) pq_getmsgfloat8(buf));
#endif
}
/*
* time_send - converts time to binary format
*/
Datum
time_send(PG_FUNCTION_ARGS)
{
TimeADT time = PG_GETARG_TIMEADT(0);
StringInfoData buf;
pq_begintypsend(&buf);
#ifdef HAVE_INT64_TIMESTAMP
pq_sendint64(&buf, time);
#else
pq_sendfloat8(&buf, time);
#endif
PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
}
/* time_scale()
* Adjust time type for specified scale factor.
* Used by PostgreSQL type system to stuff columns.
*/
Datum
time_scale(PG_FUNCTION_ARGS)
{
TimeADT time = PG_GETARG_TIMEADT(0);
int32 typmod = PG_GETARG_INT32(1);
TimeADT result;
result = time;
AdjustTimeForTypmod(&result, typmod);
PG_RETURN_TIMEADT(result);
}
/* AdjustTimeForTypmod()
* Force the precision of the time value to a specified value.
* Uses *exactly* the same code as in AdjustTimestampForTypemod()
* but we make a separate copy because those types do not
* have a fundamental tie together but rather a coincidence of
* implementation. - thomas
*/
static void
AdjustTimeForTypmod(TimeADT *time, int32 typmod)
{
#ifdef HAVE_INT64_TIMESTAMP
static const int64 TimeScales[MAX_TIME_PRECISION + 1] = {
INT64CONST(1000000),
INT64CONST(100000),
INT64CONST(10000),
INT64CONST(1000),
INT64CONST(100),
INT64CONST(10),
INT64CONST(1)
};
static const int64 TimeOffsets[MAX_TIME_PRECISION + 1] = {
INT64CONST(500000),
INT64CONST(50000),
INT64CONST(5000),
INT64CONST(500),
INT64CONST(50),
INT64CONST(5),
INT64CONST(0)
};
#else
/* note MAX_TIME_PRECISION differs in this case */
static const double TimeScales[MAX_TIME_PRECISION + 1] = {
1.0,
10.0,
100.0,
1000.0,
10000.0,
100000.0,
1000000.0,
10000000.0,
100000000.0,
1000000000.0,
10000000000.0
};
#endif
if ((typmod >= 0) && (typmod <= MAX_TIME_PRECISION))
{
/*
* Note: this round-to-nearest code is not completely consistent
* about rounding values that are exactly halfway between integral
* values. On most platforms, rint() will implement
* round-to-nearest-even, but the integer code always rounds up
* (away from zero). Is it worth trying to be consistent?
*/
#ifdef HAVE_INT64_TIMESTAMP
if (*time >= INT64CONST(0))
{
*time = (((*time + TimeOffsets[typmod]) / TimeScales[typmod])
* TimeScales[typmod]);
}
else
{
*time = -((((-*time) + TimeOffsets[typmod]) / TimeScales[typmod])
* TimeScales[typmod]);
}
#else
*time = (rint(((double) *time) * TimeScales[typmod])
/ TimeScales[typmod]);
#endif
}
}
Datum
time_eq(PG_FUNCTION_ARGS)
{
TimeADT time1 = PG_GETARG_TIMEADT(0);
TimeADT time2 = PG_GETARG_TIMEADT(1);
PG_RETURN_BOOL(time1 == time2);
}
Datum
time_ne(PG_FUNCTION_ARGS)
{
TimeADT time1 = PG_GETARG_TIMEADT(0);
TimeADT time2 = PG_GETARG_TIMEADT(1);
PG_RETURN_BOOL(time1 != time2);
}
Datum
time_lt(PG_FUNCTION_ARGS)
{
TimeADT time1 = PG_GETARG_TIMEADT(0);
TimeADT time2 = PG_GETARG_TIMEADT(1);
PG_RETURN_BOOL(time1 < time2);
}
Datum
time_le(PG_FUNCTION_ARGS)
{
TimeADT time1 = PG_GETARG_TIMEADT(0);
TimeADT time2 = PG_GETARG_TIMEADT(1);
PG_RETURN_BOOL(time1 <= time2);
}
Datum
time_gt(PG_FUNCTION_ARGS)
{
TimeADT time1 = PG_GETARG_TIMEADT(0);
TimeADT time2 = PG_GETARG_TIMEADT(1);
PG_RETURN_BOOL(time1 > time2);
}
Datum
time_ge(PG_FUNCTION_ARGS)
{
TimeADT time1 = PG_GETARG_TIMEADT(0);
TimeADT time2 = PG_GETARG_TIMEADT(1);
PG_RETURN_BOOL(time1 >= time2);
}
Datum
time_cmp(PG_FUNCTION_ARGS)
{
TimeADT time1 = PG_GETARG_TIMEADT(0);
TimeADT time2 = PG_GETARG_TIMEADT(1);
if (time1 < time2)
PG_RETURN_INT32(-1);
if (time1 > time2)
PG_RETURN_INT32(1);
PG_RETURN_INT32(0);
}
Datum
time_larger(PG_FUNCTION_ARGS)
{
TimeADT time1 = PG_GETARG_TIMEADT(0);
TimeADT time2 = PG_GETARG_TIMEADT(1);
PG_RETURN_TIMEADT((time1 > time2) ? time1 : time2);
}
Datum
time_smaller(PG_FUNCTION_ARGS)
{
TimeADT time1 = PG_GETARG_TIMEADT(0);
TimeADT time2 = PG_GETARG_TIMEADT(1);
PG_RETURN_TIMEADT((time1 < time2) ? time1 : time2);
}
/* overlaps_time() --- implements the SQL92 OVERLAPS operator.
*
* Algorithm is per SQL92 spec. This is much harder than you'd think
* because the spec requires us to deliver a non-null answer in some cases
* where some of the inputs are null.
*/
Datum
overlaps_time(PG_FUNCTION_ARGS)
{
/*
* The arguments are TimeADT, but we leave them as generic Datums to
* avoid dereferencing nulls (TimeADT is pass-by-reference!)
*/
Datum ts1 = PG_GETARG_DATUM(0);
Datum te1 = PG_GETARG_DATUM(1);
Datum ts2 = PG_GETARG_DATUM(2);
Datum te2 = PG_GETARG_DATUM(3);
bool ts1IsNull = PG_ARGISNULL(0);
bool te1IsNull = PG_ARGISNULL(1);
bool ts2IsNull = PG_ARGISNULL(2);
bool te2IsNull = PG_ARGISNULL(3);
#define TIMEADT_GT(t1,t2) \
(DatumGetTimeADT(t1) > DatumGetTimeADT(t2))
#define TIMEADT_LT(t1,t2) \
(DatumGetTimeADT(t1) < DatumGetTimeADT(t2))
/*
* If both endpoints of interval 1 are null, the result is null
* (unknown). If just one endpoint is null, take ts1 as the non-null
* one. Otherwise, take ts1 as the lesser endpoint.
*/
if (ts1IsNull)
{
if (te1IsNull)
PG_RETURN_NULL();
/* swap null for non-null */
ts1 = te1;
te1IsNull = true;
}
else if (!te1IsNull)
{
if (TIMEADT_GT(ts1, te1))
{
Datum tt = ts1;
ts1 = te1;
te1 = tt;
}
}
/* Likewise for interval 2. */
if (ts2IsNull)
{
if (te2IsNull)
PG_RETURN_NULL();
/* swap null for non-null */
ts2 = te2;
te2IsNull = true;
}
else if (!te2IsNull)
{
if (TIMEADT_GT(ts2, te2))
{
Datum tt = ts2;
ts2 = te2;
te2 = tt;
}
}
/*
* At this point neither ts1 nor ts2 is null, so we can consider three
* cases: ts1 > ts2, ts1 < ts2, ts1 = ts2
*/
if (TIMEADT_GT(ts1, ts2))
{
/*
* This case is ts1 < te2 OR te1 < te2, which may look redundant
* but in the presence of nulls it's not quite completely so.
*/
if (te2IsNull)
PG_RETURN_NULL();
if (TIMEADT_LT(ts1, te2))
PG_RETURN_BOOL(true);
if (te1IsNull)
PG_RETURN_NULL();
/*
* If te1 is not null then we had ts1 <= te1 above, and we just
* found ts1 >= te2, hence te1 >= te2.
*/
PG_RETURN_BOOL(false);
}
else if (TIMEADT_LT(ts1, ts2))
{
/* This case is ts2 < te1 OR te2 < te1 */
if (te1IsNull)
PG_RETURN_NULL();
if (TIMEADT_LT(ts2, te1))
PG_RETURN_BOOL(true);
if (te2IsNull)
PG_RETURN_NULL();
/*
* If te2 is not null then we had ts2 <= te2 above, and we just
* found ts2 >= te1, hence te2 >= te1.
*/
PG_RETURN_BOOL(false);
}
else
{
/*
* For ts1 = ts2 the spec says te1 <> te2 OR te1 = te2, which is a
* rather silly way of saying "true if both are nonnull, else
* null".
*/
if (te1IsNull || te2IsNull)
PG_RETURN_NULL();
PG_RETURN_BOOL(true);
}
#undef TIMEADT_GT
#undef TIMEADT_LT
}
/* timestamp_time()
* Convert timestamp to time data type.
*/
Datum
timestamp_time(PG_FUNCTION_ARGS)
{
Timestamp timestamp = PG_GETARG_TIMESTAMP(0);
TimeADT result;
struct pg_tm tt,
*tm = &tt;
fsec_t fsec;
if (TIMESTAMP_NOT_FINITE(timestamp))
PG_RETURN_NULL();
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL) != 0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
#ifdef HAVE_INT64_TIMESTAMP
/*
* Could also do this with time = (timestamp / 86400000000 *
* 86400000000) - timestamp;
*/
result = ((((((tm->tm_hour * 60) + tm->tm_min) * 60) + tm->tm_sec)
* INT64CONST(1000000)) + fsec);
#else
result = ((((tm->tm_hour * 60) + tm->tm_min) * 60) + tm->tm_sec + fsec);
#endif
PG_RETURN_TIMEADT(result);
}
/* timestamptz_time()
* Convert timestamptz to time data type.
*/
Datum
timestamptz_time(PG_FUNCTION_ARGS)
{
TimestampTz timestamp = PG_GETARG_TIMESTAMP(0);
TimeADT result;
struct pg_tm tt,
*tm = &tt;
int tz;
fsec_t fsec;
char *tzn;
if (TIMESTAMP_NOT_FINITE(timestamp))
PG_RETURN_NULL();
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn) != 0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
#ifdef HAVE_INT64_TIMESTAMP
/*
* Could also do this with time = (timestamp / 86400000000 *
* 86400000000) - timestamp;
*/
result = ((((((tm->tm_hour * 60) + tm->tm_min) * 60) + tm->tm_sec)
* INT64CONST(1000000)) + fsec);
#else
result = ((((tm->tm_hour * 60) + tm->tm_min) * 60) + tm->tm_sec + fsec);
#endif
PG_RETURN_TIMEADT(result);
}
/* datetime_timestamp()
* Convert date and time to timestamp data type.
*/
Datum
datetime_timestamp(PG_FUNCTION_ARGS)
{
DateADT date = PG_GETARG_DATEADT(0);
TimeADT time = PG_GETARG_TIMEADT(1);
Timestamp result;
result = DatumGetTimestamp(DirectFunctionCall1(date_timestamp,
DateADTGetDatum(date)));
result += time;
PG_RETURN_TIMESTAMP(result);
}
/* time_interval()
* Convert time to interval data type.
*/
Datum
time_interval(PG_FUNCTION_ARGS)
{
TimeADT time = PG_GETARG_TIMEADT(0);
Interval *result;
result = (Interval *) palloc(sizeof(Interval));
result->time = time;
result->month = 0;
PG_RETURN_INTERVAL_P(result);
}
/* interval_time()
* Convert interval to time data type.
*
* This is defined as producing the fractional-day portion of the interval.
* Therefore, we can just ignore the months field. It is not real clear
* what to do with negative intervals, but we choose to subtract the floor,
* so that, say, '-2 hours' becomes '22:00:00'.
*/
Datum
interval_time(PG_FUNCTION_ARGS)
{
Interval *span = PG_GETARG_INTERVAL_P(0);
TimeADT result;
#ifdef HAVE_INT64_TIMESTAMP
int64 days;
result = span->time;
if (result >= INT64CONST(86400000000))
{
days = result / INT64CONST(86400000000);
result -= days * INT64CONST(86400000000);
}
else if (result < 0)
{
days = (-result + INT64CONST(86400000000 - 1)) / INT64CONST(86400000000);
result += days * INT64CONST(86400000000);
}
#else
result = span->time;
if (result >= 86400e0 || result < 0)
result -= floor(result / 86400e0) * 86400e0;
#endif
PG_RETURN_TIMEADT(result);
}
/* time_mi_time()
* Subtract two times to produce an interval.
*/
Datum
time_mi_time(PG_FUNCTION_ARGS)
{
TimeADT time1 = PG_GETARG_TIMEADT(0);
TimeADT time2 = PG_GETARG_TIMEADT(1);
Interval *result;
result = (Interval *) palloc(sizeof(Interval));
result->time = (time1 - time2);
result->month = 0;
PG_RETURN_INTERVAL_P(result);
}
/* time_pl_interval()
* Add interval to time.
*/
Datum
time_pl_interval(PG_FUNCTION_ARGS)
{
TimeADT time = PG_GETARG_TIMEADT(0);
Interval *span = PG_GETARG_INTERVAL_P(1);
TimeADT result;
#ifdef HAVE_INT64_TIMESTAMP
result = (time + span->time);
result -= (result / INT64CONST(86400000000) * INT64CONST(86400000000));
if (result < INT64CONST(0))
result += INT64CONST(86400000000);
#else
TimeADT time1;
result = (time + span->time);
TMODULO(result, time1, 86400e0);
if (result < 0)
result += 86400;
#endif
PG_RETURN_TIMEADT(result);
}
/* time_mi_interval()
* Subtract interval from time.
*/
Datum
time_mi_interval(PG_FUNCTION_ARGS)
{
TimeADT time = PG_GETARG_TIMEADT(0);
Interval *span = PG_GETARG_INTERVAL_P(1);
TimeADT result;
#ifdef HAVE_INT64_TIMESTAMP
result = (time - span->time);
result -= (result / INT64CONST(86400000000) * INT64CONST(86400000000));
if (result < INT64CONST(0))
result += INT64CONST(86400000000);
#else
TimeADT time1;
result = (time - span->time);
TMODULO(result, time1, 86400e0);
if (result < 0)
result += 86400;
#endif
PG_RETURN_TIMEADT(result);
}
/* interval_pl_time()
* Add time to interval.
*/
Datum
interval_pl_time(PG_FUNCTION_ARGS)
{
Datum span = PG_GETARG_DATUM(0);
Datum time = PG_GETARG_DATUM(1);
return DirectFunctionCall2(time_pl_interval, time, span);
}
/* time_text()
* Convert time to text data type.
*/
Datum
time_text(PG_FUNCTION_ARGS)
{
/* Input is a Time, but may as well leave it in Datum form */
Datum time = PG_GETARG_DATUM(0);
text *result;
char *str;
int len;
str = DatumGetCString(DirectFunctionCall1(time_out, time));
len = (strlen(str) + VARHDRSZ);
result = palloc(len);
VARATT_SIZEP(result) = len;
memmove(VARDATA(result), str, (len - VARHDRSZ));
pfree(str);
PG_RETURN_TEXT_P(result);
}
/* text_time()
* Convert text string to time.
* Text type is not null terminated, so use temporary string
* then call the standard input routine.
*/
Datum
text_time(PG_FUNCTION_ARGS)
{
text *str = PG_GETARG_TEXT_P(0);
int i;
char *sp,
*dp,
dstr[MAXDATELEN + 1];
if (VARSIZE(str) - VARHDRSZ > MAXDATELEN)
ereport(ERROR,
(errcode(ERRCODE_INVALID_DATETIME_FORMAT),
errmsg("invalid input syntax for type time: \"%s\"",
VARDATA(str))));
sp = VARDATA(str);
dp = dstr;
for (i = 0; i < (VARSIZE(str) - VARHDRSZ); i++)
*dp++ = *sp++;
*dp = '\0';
return DirectFunctionCall3(time_in,
CStringGetDatum(dstr),
ObjectIdGetDatum(InvalidOid),
Int32GetDatum(-1));
}
/* time_part()
* Extract specified field from time type.
*/
Datum
time_part(PG_FUNCTION_ARGS)
{
text *units = PG_GETARG_TEXT_P(0);
TimeADT time = PG_GETARG_TIMEADT(1);
float8 result;
int type,
val;
char *lowunits;
lowunits = downcase_truncate_identifier(VARDATA(units),
VARSIZE(units) - VARHDRSZ,
false);
type = DecodeUnits(0, lowunits, &val);
if (type == UNKNOWN_FIELD)
type = DecodeSpecial(0, lowunits, &val);
if (type == UNITS)
{
fsec_t fsec;
struct pg_tm tt,
*tm = &tt;
time2tm(time, tm, &fsec);
switch (val)
{
case DTK_MICROSEC:
#ifdef HAVE_INT64_TIMESTAMP
result = ((tm->tm_sec * INT64CONST(1000000)) + fsec);
#else
result = ((tm->tm_sec + fsec) * 1000000);
#endif
break;
case DTK_MILLISEC:
#ifdef HAVE_INT64_TIMESTAMP
result = ((tm->tm_sec * INT64CONST(1000))
+ (fsec / INT64CONST(1000)));
#else
result = ((tm->tm_sec + fsec) * 1000);
#endif
break;
case DTK_SECOND:
#ifdef HAVE_INT64_TIMESTAMP
result = (tm->tm_sec + (fsec / INT64CONST(1000000)));
#else
result = (tm->tm_sec + fsec);
#endif
break;
case DTK_MINUTE:
result = tm->tm_min;
break;
case DTK_HOUR:
result = tm->tm_hour;
break;
case DTK_TZ:
case DTK_TZ_MINUTE:
case DTK_TZ_HOUR:
case DTK_DAY:
case DTK_MONTH:
case DTK_QUARTER:
case DTK_YEAR:
case DTK_DECADE:
case DTK_CENTURY:
case DTK_MILLENNIUM:
default:
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("\"time\" units \"%s\" not recognized",
DatumGetCString(DirectFunctionCall1(textout,
PointerGetDatum(units))))));
result = 0;
}
}
else if ((type == RESERV) && (val == DTK_EPOCH))
{
#ifdef HAVE_INT64_TIMESTAMP
result = (time / 1000000e0);
#else
result = time;
#endif
}
else
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("\"time\" units \"%s\" not recognized",
DatumGetCString(DirectFunctionCall1(textout,
PointerGetDatum(units))))));
result = 0;
}
PG_RETURN_FLOAT8(result);
}
/*****************************************************************************
* Time With Time Zone ADT
*****************************************************************************/
/* tm2timetz()
* Convert a tm structure to a time data type.
*/
static int
tm2timetz(struct pg_tm * tm, fsec_t fsec, int tz, TimeTzADT *result)
{
#ifdef HAVE_INT64_TIMESTAMP
result->time = ((((((tm->tm_hour * 60) + tm->tm_min) * 60) + tm->tm_sec)
* INT64CONST(1000000)) + fsec);
#else
result->time = ((((tm->tm_hour * 60) + tm->tm_min) * 60) + tm->tm_sec + fsec);
#endif
result->zone = tz;
return 0;
}
Datum
timetz_in(PG_FUNCTION_ARGS)
{
char *str = PG_GETARG_CSTRING(0);
#ifdef NOT_USED
Oid typelem = PG_GETARG_OID(1);
#endif
int32 typmod = PG_GETARG_INT32(2);
TimeTzADT *result;
fsec_t fsec;
struct pg_tm tt,
*tm = &tt;
int tz;
int nf;
int dterr;
char lowstr[MAXDATELEN + 1];
char *field[MAXDATEFIELDS];
int dtype;
int ftype[MAXDATEFIELDS];
if (strlen(str) >= sizeof(lowstr))
dterr = DTERR_BAD_FORMAT;
else
dterr = ParseDateTime(str, lowstr, field, ftype, MAXDATEFIELDS, &nf);
if (dterr == 0)
dterr = DecodeTimeOnly(field, ftype, nf, &dtype, tm, &fsec, &tz);
if (dterr != 0)
DateTimeParseError(dterr, str, "time with time zone");
result = (TimeTzADT *) palloc(sizeof(TimeTzADT));
tm2timetz(tm, fsec, tz, result);
AdjustTimeForTypmod(&(result->time), typmod);
PG_RETURN_TIMETZADT_P(result);
}
Datum
timetz_out(PG_FUNCTION_ARGS)
{
TimeTzADT *time = PG_GETARG_TIMETZADT_P(0);
char *result;
struct pg_tm tt,
*tm = &tt;
fsec_t fsec;
int tz;
char buf[MAXDATELEN + 1];
timetz2tm(time, tm, &fsec, &tz);
EncodeTimeOnly(tm, fsec, &tz, DateStyle, buf);
result = pstrdup(buf);
PG_RETURN_CSTRING(result);
}
/*
* timetz_recv - converts external binary format to timetz
*/
Datum
timetz_recv(PG_FUNCTION_ARGS)
{
StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
TimeTzADT *time;
time = (TimeTzADT *) palloc(sizeof(TimeTzADT));
#ifdef HAVE_INT64_TIMESTAMP
time->time = pq_getmsgint64(buf);
#else
time->time = pq_getmsgfloat8(buf);
#endif
time->zone = pq_getmsgint(buf, sizeof(time->zone));
PG_RETURN_TIMETZADT_P(time);
}
/*
* timetz_send - converts timetz to binary format
*/
Datum
timetz_send(PG_FUNCTION_ARGS)
{
TimeTzADT *time = PG_GETARG_TIMETZADT_P(0);
StringInfoData buf;
pq_begintypsend(&buf);
#ifdef HAVE_INT64_TIMESTAMP
pq_sendint64(&buf, time->time);
#else
pq_sendfloat8(&buf, time->time);
#endif
pq_sendint(&buf, time->zone, sizeof(time->zone));
PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
}
/* timetz2tm()
* Convert TIME WITH TIME ZONE data type to POSIX time structure.
*/
static int
timetz2tm(TimeTzADT *time, struct pg_tm * tm, fsec_t *fsec, int *tzp)
{
#ifdef HAVE_INT64_TIMESTAMP
int64 trem = time->time;
tm->tm_hour = (trem / INT64CONST(3600000000));
trem -= (tm->tm_hour * INT64CONST(3600000000));
tm->tm_min = (trem / INT64CONST(60000000));
trem -= (tm->tm_min * INT64CONST(60000000));
tm->tm_sec = (trem / INT64CONST(1000000));
*fsec = (trem - (tm->tm_sec * INT64CONST(1000000)));
#else
double trem = time->time;
TMODULO(trem, tm->tm_hour, 3600e0);
TMODULO(trem, tm->tm_min, 60e0);
TMODULO(trem, tm->tm_sec, 1e0);
*fsec = trem;
#endif
if (tzp != NULL)
*tzp = time->zone;
return 0;
}
/* timetz_scale()
* Adjust time type for specified scale factor.
* Used by PostgreSQL type system to stuff columns.
*/
Datum
timetz_scale(PG_FUNCTION_ARGS)
{
TimeTzADT *time = PG_GETARG_TIMETZADT_P(0);
int32 typmod = PG_GETARG_INT32(1);
TimeTzADT *result;
result = (TimeTzADT *) palloc(sizeof(TimeTzADT));
result->time = time->time;
result->zone = time->zone;
AdjustTimeForTypmod(&(result->time), typmod);
PG_RETURN_TIMETZADT_P(result);
}
static int
timetz_cmp_internal(TimeTzADT *time1, TimeTzADT *time2)
{
double t1,
t2;
/* Primary sort is by true (GMT-equivalent) time */
t1 = time1->time + time1->zone;
t2 = time2->time + time2->zone;
if (t1 > t2)
return 1;
if (t1 < t2)
return -1;
/*
* If same GMT time, sort by timezone; we only want to say that two
* timetz's are equal if both the time and zone parts are equal.
*/
if (time1->zone > time2->zone)
return 1;
if (time1->zone < time2->zone)
return -1;
return 0;
}
Datum
timetz_eq(PG_FUNCTION_ARGS)
{
TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0);
TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1);
PG_RETURN_BOOL(timetz_cmp_internal(time1, time2) == 0);
}
Datum
timetz_ne(PG_FUNCTION_ARGS)
{
TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0);
TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1);
PG_RETURN_BOOL(timetz_cmp_internal(time1, time2) != 0);
}
Datum
timetz_lt(PG_FUNCTION_ARGS)
{
TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0);
TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1);
PG_RETURN_BOOL(timetz_cmp_internal(time1, time2) < 0);
}
Datum
timetz_le(PG_FUNCTION_ARGS)
{
TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0);
TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1);
PG_RETURN_BOOL(timetz_cmp_internal(time1, time2) <= 0);
}
Datum
timetz_gt(PG_FUNCTION_ARGS)
{
TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0);
TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1);
PG_RETURN_BOOL(timetz_cmp_internal(time1, time2) > 0);
}
Datum
timetz_ge(PG_FUNCTION_ARGS)
{
TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0);
TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1);
PG_RETURN_BOOL(timetz_cmp_internal(time1, time2) >= 0);
}
Datum
timetz_cmp(PG_FUNCTION_ARGS)
{
TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0);
TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1);
PG_RETURN_INT32(timetz_cmp_internal(time1, time2));
}
/*
* timetz, being an unusual size, needs a specialized hash function.
*/
Datum
timetz_hash(PG_FUNCTION_ARGS)
{
TimeTzADT *key = PG_GETARG_TIMETZADT_P(0);
/*
* Specify hash length as sizeof(double) + sizeof(int4), not as
* sizeof(TimeTzADT), so that any garbage pad bytes in the structure
* won't be included in the hash!
*/
return hash_any((unsigned char *) key, sizeof(key->time) + sizeof(key->zone));
}
Datum
timetz_larger(PG_FUNCTION_ARGS)
{
TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0);
TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1);
TimeTzADT *result;
if (timetz_cmp_internal(time1, time2) > 0)
result = time1;
else
result = time2;
PG_RETURN_TIMETZADT_P(result);
}
Datum
timetz_smaller(PG_FUNCTION_ARGS)
{
TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0);
TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1);
TimeTzADT *result;
if (timetz_cmp_internal(time1, time2) < 0)
result = time1;
else
result = time2;
PG_RETURN_TIMETZADT_P(result);
}
/* timetz_pl_interval()
* Add interval to timetz.
*/
Datum
timetz_pl_interval(PG_FUNCTION_ARGS)
{
TimeTzADT *time = PG_GETARG_TIMETZADT_P(0);
Interval *span = PG_GETARG_INTERVAL_P(1);
TimeTzADT *result;
#ifndef HAVE_INT64_TIMESTAMP
TimeTzADT time1;
#endif
result = (TimeTzADT *) palloc(sizeof(TimeTzADT));
#ifdef HAVE_INT64_TIMESTAMP
result->time = (time->time + span->time);
result->time -= (result->time / INT64CONST(86400000000) * INT64CONST(86400000000));
if (result->time < INT64CONST(0))
result->time += INT64CONST(86400000000);
#else
result->time = (time->time + span->time);
TMODULO(result->time, time1.time, 86400e0);
if (result->time < 0)
result->time += 86400;
#endif
result->zone = time->zone;
PG_RETURN_TIMETZADT_P(result);
}
/* timetz_mi_interval()
* Subtract interval from timetz.
*/
Datum
timetz_mi_interval(PG_FUNCTION_ARGS)
{
TimeTzADT *time = PG_GETARG_TIMETZADT_P(0);
Interval *span = PG_GETARG_INTERVAL_P(1);
TimeTzADT *result;
#ifndef HAVE_INT64_TIMESTAMP
TimeTzADT time1;
#endif
result = (TimeTzADT *) palloc(sizeof(TimeTzADT));
#ifdef HAVE_INT64_TIMESTAMP
result->time = (time->time - span->time);
result->time -= (result->time / INT64CONST(86400000000) * INT64CONST(86400000000));
if (result->time < INT64CONST(0))
result->time += INT64CONST(86400000000);
#else
result->time = (time->time - span->time);
TMODULO(result->time, time1.time, 86400e0);
if (result->time < 0)
result->time += 86400;
#endif
result->zone = time->zone;
PG_RETURN_TIMETZADT_P(result);
}
/* overlaps_timetz() --- implements the SQL92 OVERLAPS operator.
*
* Algorithm is per SQL92 spec. This is much harder than you'd think
* because the spec requires us to deliver a non-null answer in some cases
* where some of the inputs are null.
*/
Datum
overlaps_timetz(PG_FUNCTION_ARGS)
{
/*
* The arguments are TimeTzADT *, but we leave them as generic Datums
* for convenience of notation --- and to avoid dereferencing nulls.
*/
Datum ts1 = PG_GETARG_DATUM(0);
Datum te1 = PG_GETARG_DATUM(1);
Datum ts2 = PG_GETARG_DATUM(2);
Datum te2 = PG_GETARG_DATUM(3);
bool ts1IsNull = PG_ARGISNULL(0);
bool te1IsNull = PG_ARGISNULL(1);
bool ts2IsNull = PG_ARGISNULL(2);
bool te2IsNull = PG_ARGISNULL(3);
#define TIMETZ_GT(t1,t2) \
DatumGetBool(DirectFunctionCall2(timetz_gt,t1,t2))
#define TIMETZ_LT(t1,t2) \
DatumGetBool(DirectFunctionCall2(timetz_lt,t1,t2))
/*
* If both endpoints of interval 1 are null, the result is null
* (unknown). If just one endpoint is null, take ts1 as the non-null
* one. Otherwise, take ts1 as the lesser endpoint.
*/
if (ts1IsNull)
{
if (te1IsNull)
PG_RETURN_NULL();
/* swap null for non-null */
ts1 = te1;
te1IsNull = true;
}
else if (!te1IsNull)
{
if (TIMETZ_GT(ts1, te1))
{
Datum tt = ts1;
ts1 = te1;
te1 = tt;
}
}
/* Likewise for interval 2. */
if (ts2IsNull)
{
if (te2IsNull)
PG_RETURN_NULL();
/* swap null for non-null */
ts2 = te2;
te2IsNull = true;
}
else if (!te2IsNull)
{
if (TIMETZ_GT(ts2, te2))
{
Datum tt = ts2;
ts2 = te2;
te2 = tt;
}
}
/*
* At this point neither ts1 nor ts2 is null, so we can consider three
* cases: ts1 > ts2, ts1 < ts2, ts1 = ts2
*/
if (TIMETZ_GT(ts1, ts2))
{
/*
* This case is ts1 < te2 OR te1 < te2, which may look redundant
* but in the presence of nulls it's not quite completely so.
*/
if (te2IsNull)
PG_RETURN_NULL();
if (TIMETZ_LT(ts1, te2))
PG_RETURN_BOOL(true);
if (te1IsNull)
PG_RETURN_NULL();
/*
* If te1 is not null then we had ts1 <= te1 above, and we just
* found ts1 >= te2, hence te1 >= te2.
*/
PG_RETURN_BOOL(false);
}
else if (TIMETZ_LT(ts1, ts2))
{
/* This case is ts2 < te1 OR te2 < te1 */
if (te1IsNull)
PG_RETURN_NULL();
if (TIMETZ_LT(ts2, te1))
PG_RETURN_BOOL(true);
if (te2IsNull)
PG_RETURN_NULL();
/*
* If te2 is not null then we had ts2 <= te2 above, and we just
* found ts2 >= te1, hence te2 >= te1.
*/
PG_RETURN_BOOL(false);
}
else
{
/*
* For ts1 = ts2 the spec says te1 <> te2 OR te1 = te2, which is a
* rather silly way of saying "true if both are nonnull, else
* null".
*/
if (te1IsNull || te2IsNull)
PG_RETURN_NULL();
PG_RETURN_BOOL(true);
}
#undef TIMETZ_GT
#undef TIMETZ_LT
}
Datum
timetz_time(PG_FUNCTION_ARGS)
{
TimeTzADT *timetz = PG_GETARG_TIMETZADT_P(0);
TimeADT result;
/* swallow the time zone and just return the time */
result = timetz->time;
PG_RETURN_TIMEADT(result);
}
Datum
time_timetz(PG_FUNCTION_ARGS)
{
TimeADT time = PG_GETARG_TIMEADT(0);
TimeTzADT *result;
struct pg_tm tt,
*tm = &tt;
fsec_t fsec;
int tz;
GetCurrentDateTime(tm);
time2tm(time, tm, &fsec);
tz = DetermineLocalTimeZone(tm);
result = (TimeTzADT *) palloc(sizeof(TimeTzADT));
result->time = time;
result->zone = tz;
PG_RETURN_TIMETZADT_P(result);
}
/* timestamptz_timetz()
* Convert timestamp to timetz data type.
*/
Datum
timestamptz_timetz(PG_FUNCTION_ARGS)
{
TimestampTz timestamp = PG_GETARG_TIMESTAMP(0);
TimeTzADT *result;
struct pg_tm tt,
*tm = &tt;
int tz;
fsec_t fsec;
char *tzn;
if (TIMESTAMP_NOT_FINITE(timestamp))
PG_RETURN_NULL();
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn) != 0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
result = (TimeTzADT *) palloc(sizeof(TimeTzADT));
tm2timetz(tm, fsec, tz, result);
PG_RETURN_TIMETZADT_P(result);
}
/* datetimetz_timestamptz()
* Convert date and timetz to timestamp with time zone data type.
* Timestamp is stored in GMT, so add the time zone
* stored with the timetz to the result.
* - thomas 2000-03-10
*/
Datum
datetimetz_timestamptz(PG_FUNCTION_ARGS)
{
DateADT date = PG_GETARG_DATEADT(0);
TimeTzADT *time = PG_GETARG_TIMETZADT_P(1);
TimestampTz result;
#ifdef HAVE_INT64_TIMESTAMP
result = (((date * INT64CONST(86400000000)) + time->time)
+ (time->zone * INT64CONST(1000000)));
#else
result = (((date * 86400.0) + time->time) + time->zone);
#endif
PG_RETURN_TIMESTAMP(result);
}
/* timetz_text()
* Convert timetz to text data type.
*/
Datum
timetz_text(PG_FUNCTION_ARGS)
{
/* Input is a Timetz, but may as well leave it in Datum form */
Datum timetz = PG_GETARG_DATUM(0);
text *result;
char *str;
int len;
str = DatumGetCString(DirectFunctionCall1(timetz_out, timetz));
len = (strlen(str) + VARHDRSZ);
result = palloc(len);
VARATT_SIZEP(result) = len;
memmove(VARDATA(result), str, (len - VARHDRSZ));
pfree(str);
PG_RETURN_TEXT_P(result);
}
/* text_timetz()
* Convert text string to timetz.
* Text type is not null terminated, so use temporary string
* then call the standard input routine.
*/
Datum
text_timetz(PG_FUNCTION_ARGS)
{
text *str = PG_GETARG_TEXT_P(0);
int i;
char *sp,
*dp,
dstr[MAXDATELEN + 1];
if (VARSIZE(str) - VARHDRSZ > MAXDATELEN)
ereport(ERROR,
(errcode(ERRCODE_INVALID_DATETIME_FORMAT),
errmsg("invalid input syntax for type time with time zone: \"%s\"",
VARDATA(str))));
sp = VARDATA(str);
dp = dstr;
for (i = 0; i < (VARSIZE(str) - VARHDRSZ); i++)
*dp++ = *sp++;
*dp = '\0';
return DirectFunctionCall3(timetz_in,
CStringGetDatum(dstr),
ObjectIdGetDatum(InvalidOid),
Int32GetDatum(-1));
}
/* timetz_part()
* Extract specified field from time type.
*/
Datum
timetz_part(PG_FUNCTION_ARGS)
{
text *units = PG_GETARG_TEXT_P(0);
TimeTzADT *time = PG_GETARG_TIMETZADT_P(1);
float8 result;
int type,
val;
char *lowunits;
lowunits = downcase_truncate_identifier(VARDATA(units),
VARSIZE(units) - VARHDRSZ,
false);
type = DecodeUnits(0, lowunits, &val);
if (type == UNKNOWN_FIELD)
type = DecodeSpecial(0, lowunits, &val);
if (type == UNITS)
{
double dummy;
int tz;
fsec_t fsec;
struct pg_tm tt,
*tm = &tt;
timetz2tm(time, tm, &fsec, &tz);
switch (val)
{
case DTK_TZ:
result = -tz;
break;
case DTK_TZ_MINUTE:
result = -tz;
result /= 60;
FMODULO(result, dummy, 60e0);
break;
case DTK_TZ_HOUR:
dummy = -tz;
FMODULO(dummy, result, 3600e0);
break;
case DTK_MICROSEC:
#ifdef HAVE_INT64_TIMESTAMP
result = ((tm->tm_sec * INT64CONST(1000000)) + fsec);
#else
result = ((tm->tm_sec + fsec) * 1000000);
#endif
break;
case DTK_MILLISEC:
#ifdef HAVE_INT64_TIMESTAMP
result = ((tm->tm_sec * INT64CONST(1000))
+ (fsec / INT64CONST(1000)));
#else
result = ((tm->tm_sec + fsec) * 1000);
#endif
break;
case DTK_SECOND:
#ifdef HAVE_INT64_TIMESTAMP
result = (tm->tm_sec + (fsec / INT64CONST(1000000)));
#else
result = (tm->tm_sec + fsec);
#endif
break;
case DTK_MINUTE:
result = tm->tm_min;
break;
case DTK_HOUR:
result = tm->tm_hour;
break;
case DTK_DAY:
case DTK_MONTH:
case DTK_QUARTER:
case DTK_YEAR:
case DTK_DECADE:
case DTK_CENTURY:
case DTK_MILLENNIUM:
default:
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("\"time with time zone\" units \"%s\" not recognized",
DatumGetCString(DirectFunctionCall1(textout,
PointerGetDatum(units))))));
result = 0;
}
}
else if ((type == RESERV) && (val == DTK_EPOCH))
{
#ifdef HAVE_INT64_TIMESTAMP
result = ((time->time / 1000000e0) - time->zone);
#else
result = (time->time - time->zone);
#endif
}
else
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("\"time with time zone\" units \"%s\" not recognized",
DatumGetCString(DirectFunctionCall1(textout,
PointerGetDatum(units))))));
result = 0;
}
PG_RETURN_FLOAT8(result);
}
/* timetz_zone()
* Encode time with time zone type with specified time zone.
*/
Datum
timetz_zone(PG_FUNCTION_ARGS)
{
text *zone = PG_GETARG_TEXT_P(0);
TimeTzADT *time = PG_GETARG_TIMETZADT_P(1);
TimeTzADT *result;
int tz;
int type,
val;
char *lowzone;
lowzone = downcase_truncate_identifier(VARDATA(zone),
VARSIZE(zone) - VARHDRSZ,
false);
type = DecodeSpecial(0, lowzone, &val);
result = (TimeTzADT *) palloc(sizeof(TimeTzADT));
if ((type == TZ) || (type == DTZ))
{
tz = val * 60;
#ifdef HAVE_INT64_TIMESTAMP
result->time = time->time + ((time->zone - tz) * INT64CONST(1000000));
while (result->time < INT64CONST(0))
result->time += INT64CONST(86400000000);
while (result->time >= INT64CONST(86400000000))
result->time -= INT64CONST(86400000000);
#else
result->time = time->time + (time->zone - tz);
while (result->time < 0)
result->time += 86400;
while (result->time >= 86400)
result->time -= 86400;
#endif
result->zone = tz;
}
else
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("time zone \"%s\" not recognized", lowzone)));
PG_RETURN_NULL();
}
PG_RETURN_TIMETZADT_P(result);
} /* timetz_zone() */
/* timetz_izone()
* Encode time with time zone type with specified time interval as time zone.
*/
Datum
timetz_izone(PG_FUNCTION_ARGS)
{
Interval *zone = PG_GETARG_INTERVAL_P(0);
TimeTzADT *time = PG_GETARG_TIMETZADT_P(1);
TimeTzADT *result;
int tz;
if (zone->month != 0)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("\"interval\" time zone \"%s\" not valid",
DatumGetCString(DirectFunctionCall1(interval_out,
PointerGetDatum(zone))))));
#ifdef HAVE_INT64_TIMESTAMP
tz = -(zone->time / INT64CONST(1000000));
#else
tz = -(zone->time);
#endif
result = (TimeTzADT *) palloc(sizeof(TimeTzADT));
#ifdef HAVE_INT64_TIMESTAMP
result->time = time->time + ((time->zone - tz) * INT64CONST(1000000));
while (result->time < INT64CONST(0))
result->time += INT64CONST(86400000000);
while (result->time >= INT64CONST(86400000000))
result->time -= INT64CONST(86400000000);
#else
result->time = time->time + (time->zone - tz);
while (result->time < 0)
result->time += 86400;
while (result->time >= 86400)
result->time -= 86400;
#endif
result->zone = tz;
PG_RETURN_TIMETZADT_P(result);
} /* timetz_izone() */
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