cd00406774
data structures and backend internal APIs. This solves problems we've seen recently with inconsistent layout of pg_control between machines that have 32-bit time_t and those that have already migrated to 64-bit time_t. Also, we can get out from under the problem that Windows' Unix-API emulation is not consistent about the width of time_t. There are a few remaining places where local time_t variables are used to hold the current or recent result of time(NULL). I didn't bother changing these since they do not affect any cross-module APIs and surely all platforms will have 64-bit time_t before overflow becomes an actual risk. time_t should be avoided for anything visible to extension modules, however.
1600 lines
37 KiB
C
1600 lines
37 KiB
C
/*-------------------------------------------------------------------------
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*
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* nabstime.c
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* Utilities for the built-in type "AbsoluteTime".
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* Functions for the built-in type "RelativeTime".
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* Functions for the built-in type "TimeInterval".
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*
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* Portions Copyright (c) 1996-2008, 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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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/adt/nabstime.c,v 1.153 2008/02/17 02:09:28 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include <ctype.h>
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#include <float.h>
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#include <limits.h>
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#include <time.h>
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#include <sys/time.h>
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#include "libpq/pqformat.h"
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#include "miscadmin.h"
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#include "utils/builtins.h"
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#include "utils/nabstime.h"
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#define MIN_DAYNUM (-24856) /* December 13, 1901 */
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#define MAX_DAYNUM 24854 /* January 18, 2038 */
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#define INVALID_RELTIME_STR "Undefined RelTime"
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#define INVALID_RELTIME_STR_LEN (sizeof(INVALID_RELTIME_STR)-1)
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#define RELTIME_LABEL '@'
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#define RELTIME_PAST "ago"
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#define DIRMAXLEN (sizeof(RELTIME_PAST)-1)
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/*
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* Unix epoch is Jan 1 00:00:00 1970.
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* Postgres knows about times sixty-eight years on either side of that
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* for these 4-byte types.
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*
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* "tinterval" is two 4-byte fields.
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* Definitions for parsing tinterval.
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*/
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#define IsSpace(C) ((C) == ' ')
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#define T_INTERVAL_INVAL 0 /* data represents no valid tinterval */
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#define T_INTERVAL_VALID 1 /* data represents a valid tinterval */
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/*
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* ['Mon May 10 23:59:12 1943 PST' 'Sun Jan 14 03:14:21 1973 PST']
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* 0 1 2 3 4 5 6
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* 1234567890123456789012345678901234567890123456789012345678901234
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*
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* we allocate some extra -- timezones are usually 3 characters but
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* this is not in the POSIX standard...
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*/
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#define T_INTERVAL_LEN 80
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#define INVALID_INTERVAL_STR "Undefined Range"
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#define INVALID_INTERVAL_STR_LEN (sizeof(INVALID_INTERVAL_STR)-1)
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#define ABSTIMEMIN(t1, t2) \
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(DatumGetBool(DirectFunctionCall2(abstimele, \
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AbsoluteTimeGetDatum(t1), \
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AbsoluteTimeGetDatum(t2))) ? (t1) : (t2))
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#define ABSTIMEMAX(t1, t2) \
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(DatumGetBool(DirectFunctionCall2(abstimelt, \
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AbsoluteTimeGetDatum(t1), \
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AbsoluteTimeGetDatum(t2))) ? (t2) : (t1))
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/*
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* Function prototypes -- internal to this file only
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*/
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static AbsoluteTime tm2abstime(struct pg_tm * tm, int tz);
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static void reltime2tm(RelativeTime time, struct pg_tm * tm);
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static void parsetinterval(char *i_string,
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AbsoluteTime *i_start,
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AbsoluteTime *i_end);
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/*
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* GetCurrentAbsoluteTime()
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*
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* Get the current system time (relative to Unix epoch).
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*
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* NB: this will overflow in 2038; it should be gone long before that.
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*/
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AbsoluteTime
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GetCurrentAbsoluteTime(void)
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{
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time_t now;
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now = time(NULL);
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return (AbsoluteTime) now;
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}
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void
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abstime2tm(AbsoluteTime _time, int *tzp, struct pg_tm * tm, char **tzn)
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{
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pg_time_t time = (pg_time_t) _time;
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struct pg_tm *tx;
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/*
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* If HasCTZSet is true then we have a brute force time zone specified. Go
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* ahead and rotate to the local time zone since we will later bypass any
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* calls which adjust the tm fields.
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*/
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if (HasCTZSet && (tzp != NULL))
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time -= CTimeZone;
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if (!HasCTZSet && tzp != NULL)
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tx = pg_localtime(&time, session_timezone);
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else
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tx = pg_gmtime(&time);
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tm->tm_year = tx->tm_year + 1900;
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tm->tm_mon = tx->tm_mon + 1;
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tm->tm_mday = tx->tm_mday;
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tm->tm_hour = tx->tm_hour;
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tm->tm_min = tx->tm_min;
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tm->tm_sec = tx->tm_sec;
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tm->tm_isdst = tx->tm_isdst;
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tm->tm_gmtoff = tx->tm_gmtoff;
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tm->tm_zone = tx->tm_zone;
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if (tzp != NULL)
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{
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/*
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* We have a brute force time zone per SQL99? Then use it without
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* change since we have already rotated to the time zone.
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*/
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if (HasCTZSet)
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{
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*tzp = CTimeZone;
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tm->tm_gmtoff = CTimeZone;
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tm->tm_isdst = 0;
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tm->tm_zone = NULL;
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if (tzn != NULL)
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*tzn = NULL;
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}
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else
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{
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*tzp = -tm->tm_gmtoff; /* tm_gmtoff is Sun/DEC-ism */
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/*
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* XXX FreeBSD man pages indicate that this should work - tgl
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* 97/04/23
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*/
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if (tzn != NULL)
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{
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/*
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* Copy no more than MAXTZLEN bytes of timezone to tzn, in
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* case it contains an error message, which doesn't fit in the
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* buffer
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*/
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StrNCpy(*tzn, tm->tm_zone, MAXTZLEN + 1);
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if (strlen(tm->tm_zone) > MAXTZLEN)
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ereport(WARNING,
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(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
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errmsg("invalid time zone name: \"%s\"",
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tm->tm_zone)));
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}
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}
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}
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else
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tm->tm_isdst = -1;
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}
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/* tm2abstime()
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* Convert a tm structure to abstime.
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* Note that tm has full year (not 1900-based) and 1-based month.
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*/
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static AbsoluteTime
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tm2abstime(struct pg_tm * tm, int tz)
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{
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int day;
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AbsoluteTime sec;
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/* validate, before going out of range on some members */
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if (tm->tm_year < 1901 || tm->tm_year > 2038 ||
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tm->tm_mon < 1 || tm->tm_mon > 12 ||
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tm->tm_mday < 1 || tm->tm_mday > 31 ||
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tm->tm_hour < 0 ||
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tm->tm_hour > 24 || /* test for > 24:00:00 */
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(tm->tm_hour == 24 && (tm->tm_min > 0 || tm->tm_sec > 0)) ||
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tm->tm_min < 0 || tm->tm_min > 59 ||
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tm->tm_sec < 0 || tm->tm_sec > 60)
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return INVALID_ABSTIME;
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day = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - UNIX_EPOCH_JDATE;
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/* check for time out of range */
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if (day < MIN_DAYNUM || day > MAX_DAYNUM)
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return INVALID_ABSTIME;
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/* convert to seconds */
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sec = tm->tm_sec + tz + (tm->tm_min + (day * HOURS_PER_DAY + tm->tm_hour) * MINS_PER_HOUR) * SECS_PER_MINUTE;
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/*
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* check for overflow. We need a little slop here because the H/M/S plus
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* TZ offset could add up to more than 1 day.
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*/
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if ((day >= MAX_DAYNUM - 10 && sec < 0) ||
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(day <= MIN_DAYNUM + 10 && sec > 0))
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return INVALID_ABSTIME;
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/* check for reserved values (e.g. "current" on edge of usual range */
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if (!AbsoluteTimeIsReal(sec))
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return INVALID_ABSTIME;
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return sec;
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}
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/* abstimein()
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* Decode date/time string and return abstime.
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*/
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Datum
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abstimein(PG_FUNCTION_ARGS)
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{
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char *str = PG_GETARG_CSTRING(0);
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AbsoluteTime result;
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fsec_t fsec;
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int tz = 0;
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struct pg_tm date,
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*tm = &date;
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int dterr;
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char *field[MAXDATEFIELDS];
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char workbuf[MAXDATELEN + 1];
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int dtype;
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int nf,
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ftype[MAXDATEFIELDS];
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dterr = ParseDateTime(str, workbuf, sizeof(workbuf),
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field, ftype, MAXDATEFIELDS, &nf);
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if (dterr == 0)
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dterr = DecodeDateTime(field, ftype, nf, &dtype, tm, &fsec, &tz);
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if (dterr != 0)
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DateTimeParseError(dterr, str, "abstime");
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switch (dtype)
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{
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case DTK_DATE:
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result = tm2abstime(tm, tz);
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break;
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case DTK_EPOCH:
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/*
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* Don't bother retaining this as a reserved value, but instead
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* just set to the actual epoch time (1970-01-01)
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*/
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result = 0;
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break;
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case DTK_LATE:
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result = NOEND_ABSTIME;
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break;
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case DTK_EARLY:
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result = NOSTART_ABSTIME;
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break;
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case DTK_INVALID:
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result = INVALID_ABSTIME;
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break;
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default:
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elog(ERROR, "unexpected dtype %d while parsing abstime \"%s\"",
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dtype, str);
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result = INVALID_ABSTIME;
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break;
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};
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PG_RETURN_ABSOLUTETIME(result);
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}
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/* abstimeout()
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* Given an AbsoluteTime return the English text version of the date
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*/
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Datum
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abstimeout(PG_FUNCTION_ARGS)
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{
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AbsoluteTime time = PG_GETARG_ABSOLUTETIME(0);
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char *result;
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int tz;
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double fsec = 0;
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struct pg_tm tt,
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*tm = &tt;
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char buf[MAXDATELEN + 1];
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char zone[MAXDATELEN + 1],
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*tzn = zone;
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switch (time)
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{
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/*
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* Note that timestamp no longer supports 'invalid'. Retain
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* 'invalid' for abstime for now, but dump it someday.
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*/
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case INVALID_ABSTIME:
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strcpy(buf, INVALID);
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break;
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case NOEND_ABSTIME:
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strcpy(buf, LATE);
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break;
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case NOSTART_ABSTIME:
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strcpy(buf, EARLY);
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break;
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default:
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abstime2tm(time, &tz, tm, &tzn);
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EncodeDateTime(tm, fsec, &tz, &tzn, DateStyle, buf);
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break;
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}
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result = pstrdup(buf);
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PG_RETURN_CSTRING(result);
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}
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/*
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* abstimerecv - converts external binary format to abstime
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*/
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Datum
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abstimerecv(PG_FUNCTION_ARGS)
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{
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StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
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PG_RETURN_ABSOLUTETIME((AbsoluteTime) pq_getmsgint(buf, sizeof(AbsoluteTime)));
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}
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/*
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* abstimesend - converts abstime to binary format
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*/
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Datum
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abstimesend(PG_FUNCTION_ARGS)
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{
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AbsoluteTime time = PG_GETARG_ABSOLUTETIME(0);
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StringInfoData buf;
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pq_begintypsend(&buf);
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pq_sendint(&buf, time, sizeof(time));
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PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
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}
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/* abstime_finite()
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*/
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Datum
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abstime_finite(PG_FUNCTION_ARGS)
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{
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AbsoluteTime abstime = PG_GETARG_ABSOLUTETIME(0);
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PG_RETURN_BOOL(abstime != INVALID_ABSTIME &&
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abstime != NOSTART_ABSTIME &&
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abstime != NOEND_ABSTIME);
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}
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/*
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* abstime comparison routines
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*/
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static int
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abstime_cmp_internal(AbsoluteTime a, AbsoluteTime b)
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{
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/*
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* We consider all INVALIDs to be equal and larger than any non-INVALID.
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* This is somewhat arbitrary; the important thing is to have a consistent
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* sort order.
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*/
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if (a == INVALID_ABSTIME)
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{
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if (b == INVALID_ABSTIME)
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return 0; /* INVALID = INVALID */
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else
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return 1; /* INVALID > non-INVALID */
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}
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if (b == INVALID_ABSTIME)
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return -1; /* non-INVALID < INVALID */
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if (a > b)
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return 1;
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else if (a == b)
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return 0;
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else
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return -1;
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}
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Datum
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abstimeeq(PG_FUNCTION_ARGS)
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{
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AbsoluteTime t1 = PG_GETARG_ABSOLUTETIME(0);
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AbsoluteTime t2 = PG_GETARG_ABSOLUTETIME(1);
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PG_RETURN_BOOL(abstime_cmp_internal(t1, t2) == 0);
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}
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Datum
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abstimene(PG_FUNCTION_ARGS)
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{
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AbsoluteTime t1 = PG_GETARG_ABSOLUTETIME(0);
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AbsoluteTime t2 = PG_GETARG_ABSOLUTETIME(1);
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PG_RETURN_BOOL(abstime_cmp_internal(t1, t2) != 0);
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}
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Datum
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abstimelt(PG_FUNCTION_ARGS)
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{
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AbsoluteTime t1 = PG_GETARG_ABSOLUTETIME(0);
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AbsoluteTime t2 = PG_GETARG_ABSOLUTETIME(1);
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PG_RETURN_BOOL(abstime_cmp_internal(t1, t2) < 0);
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}
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Datum
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abstimegt(PG_FUNCTION_ARGS)
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{
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AbsoluteTime t1 = PG_GETARG_ABSOLUTETIME(0);
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AbsoluteTime t2 = PG_GETARG_ABSOLUTETIME(1);
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PG_RETURN_BOOL(abstime_cmp_internal(t1, t2) > 0);
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}
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Datum
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abstimele(PG_FUNCTION_ARGS)
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{
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AbsoluteTime t1 = PG_GETARG_ABSOLUTETIME(0);
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AbsoluteTime t2 = PG_GETARG_ABSOLUTETIME(1);
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PG_RETURN_BOOL(abstime_cmp_internal(t1, t2) <= 0);
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}
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Datum
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abstimege(PG_FUNCTION_ARGS)
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{
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AbsoluteTime t1 = PG_GETARG_ABSOLUTETIME(0);
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AbsoluteTime t2 = PG_GETARG_ABSOLUTETIME(1);
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PG_RETURN_BOOL(abstime_cmp_internal(t1, t2) >= 0);
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}
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Datum
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btabstimecmp(PG_FUNCTION_ARGS)
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{
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AbsoluteTime t1 = PG_GETARG_ABSOLUTETIME(0);
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AbsoluteTime t2 = PG_GETARG_ABSOLUTETIME(1);
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PG_RETURN_INT32(abstime_cmp_internal(t1, t2));
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}
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/* timestamp_abstime()
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* Convert timestamp to abstime.
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*/
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Datum
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timestamp_abstime(PG_FUNCTION_ARGS)
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{
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Timestamp timestamp = PG_GETARG_TIMESTAMP(0);
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AbsoluteTime result;
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fsec_t fsec;
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int tz;
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struct pg_tm tt,
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*tm = &tt;
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if (TIMESTAMP_IS_NOBEGIN(timestamp))
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result = NOSTART_ABSTIME;
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else if (TIMESTAMP_IS_NOEND(timestamp))
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result = NOEND_ABSTIME;
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else if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) == 0)
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{
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tz = DetermineTimeZoneOffset(tm, session_timezone);
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result = tm2abstime(tm, tz);
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}
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else
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{
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ereport(ERROR,
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(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
|
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errmsg("timestamp out of range")));
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result = INVALID_ABSTIME;
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}
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PG_RETURN_ABSOLUTETIME(result);
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}
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|
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/* abstime_timestamp()
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* Convert abstime to timestamp.
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*/
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Datum
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abstime_timestamp(PG_FUNCTION_ARGS)
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{
|
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AbsoluteTime abstime = PG_GETARG_ABSOLUTETIME(0);
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Timestamp result;
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struct pg_tm tt,
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*tm = &tt;
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int tz;
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char zone[MAXDATELEN + 1],
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*tzn = zone;
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|
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switch (abstime)
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{
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case INVALID_ABSTIME:
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ereport(ERROR,
|
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(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
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errmsg("cannot convert abstime \"invalid\" to timestamp")));
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TIMESTAMP_NOBEGIN(result);
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break;
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|
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case NOSTART_ABSTIME:
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TIMESTAMP_NOBEGIN(result);
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break;
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|
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case NOEND_ABSTIME:
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TIMESTAMP_NOEND(result);
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break;
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|
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default:
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abstime2tm(abstime, &tz, tm, &tzn);
|
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if (tm2timestamp(tm, 0, NULL, &result) != 0)
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ereport(ERROR,
|
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(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
|
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errmsg("timestamp out of range")));
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break;
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};
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|
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PG_RETURN_TIMESTAMP(result);
|
|
}
|
|
|
|
|
|
/* timestamptz_abstime()
|
|
* Convert timestamp with time zone to abstime.
|
|
*/
|
|
Datum
|
|
timestamptz_abstime(PG_FUNCTION_ARGS)
|
|
{
|
|
TimestampTz timestamp = PG_GETARG_TIMESTAMP(0);
|
|
AbsoluteTime result;
|
|
fsec_t fsec;
|
|
struct pg_tm tt,
|
|
*tm = &tt;
|
|
|
|
if (TIMESTAMP_IS_NOBEGIN(timestamp))
|
|
result = NOSTART_ABSTIME;
|
|
else if (TIMESTAMP_IS_NOEND(timestamp))
|
|
result = NOEND_ABSTIME;
|
|
else if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) == 0)
|
|
result = tm2abstime(tm, 0);
|
|
else
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
|
|
errmsg("timestamp out of range")));
|
|
result = INVALID_ABSTIME;
|
|
}
|
|
|
|
PG_RETURN_ABSOLUTETIME(result);
|
|
}
|
|
|
|
/* abstime_timestamptz()
|
|
* Convert abstime to timestamp with time zone.
|
|
*/
|
|
Datum
|
|
abstime_timestamptz(PG_FUNCTION_ARGS)
|
|
{
|
|
AbsoluteTime abstime = PG_GETARG_ABSOLUTETIME(0);
|
|
TimestampTz result;
|
|
struct pg_tm tt,
|
|
*tm = &tt;
|
|
int tz;
|
|
char zone[MAXDATELEN + 1],
|
|
*tzn = zone;
|
|
|
|
switch (abstime)
|
|
{
|
|
case INVALID_ABSTIME:
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("cannot convert abstime \"invalid\" to timestamp")));
|
|
TIMESTAMP_NOBEGIN(result);
|
|
break;
|
|
|
|
case NOSTART_ABSTIME:
|
|
TIMESTAMP_NOBEGIN(result);
|
|
break;
|
|
|
|
case NOEND_ABSTIME:
|
|
TIMESTAMP_NOEND(result);
|
|
break;
|
|
|
|
default:
|
|
abstime2tm(abstime, &tz, tm, &tzn);
|
|
if (tm2timestamp(tm, 0, &tz, &result) != 0)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
|
|
errmsg("timestamp out of range")));
|
|
break;
|
|
};
|
|
|
|
PG_RETURN_TIMESTAMP(result);
|
|
}
|
|
|
|
|
|
/*****************************************************************************
|
|
* USER I/O ROUTINES *
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* reltimein - converts a reltime string in an internal format
|
|
*/
|
|
Datum
|
|
reltimein(PG_FUNCTION_ARGS)
|
|
{
|
|
char *str = PG_GETARG_CSTRING(0);
|
|
RelativeTime result;
|
|
struct pg_tm tt,
|
|
*tm = &tt;
|
|
fsec_t fsec;
|
|
int dtype;
|
|
int dterr;
|
|
char *field[MAXDATEFIELDS];
|
|
int nf,
|
|
ftype[MAXDATEFIELDS];
|
|
char workbuf[MAXDATELEN + 1];
|
|
|
|
dterr = ParseDateTime(str, workbuf, sizeof(workbuf),
|
|
field, ftype, MAXDATEFIELDS, &nf);
|
|
if (dterr == 0)
|
|
dterr = DecodeInterval(field, ftype, nf, &dtype, tm, &fsec);
|
|
if (dterr != 0)
|
|
{
|
|
if (dterr == DTERR_FIELD_OVERFLOW)
|
|
dterr = DTERR_INTERVAL_OVERFLOW;
|
|
DateTimeParseError(dterr, str, "reltime");
|
|
}
|
|
|
|
switch (dtype)
|
|
{
|
|
case DTK_DELTA:
|
|
result = ((tm->tm_hour * MINS_PER_HOUR + tm->tm_min) * SECS_PER_MINUTE) + tm->tm_sec;
|
|
result += tm->tm_year * SECS_PER_YEAR + ((tm->tm_mon * DAYS_PER_MONTH) + tm->tm_mday) * SECS_PER_DAY;
|
|
break;
|
|
|
|
default:
|
|
elog(ERROR, "unexpected dtype %d while parsing reltime \"%s\"",
|
|
dtype, str);
|
|
result = INVALID_RELTIME;
|
|
break;
|
|
}
|
|
|
|
PG_RETURN_RELATIVETIME(result);
|
|
}
|
|
|
|
/*
|
|
* reltimeout - converts the internal format to a reltime string
|
|
*/
|
|
Datum
|
|
reltimeout(PG_FUNCTION_ARGS)
|
|
{
|
|
RelativeTime time = PG_GETARG_RELATIVETIME(0);
|
|
char *result;
|
|
struct pg_tm tt,
|
|
*tm = &tt;
|
|
char buf[MAXDATELEN + 1];
|
|
|
|
reltime2tm(time, tm);
|
|
EncodeInterval(tm, 0, DateStyle, buf);
|
|
|
|
result = pstrdup(buf);
|
|
PG_RETURN_CSTRING(result);
|
|
}
|
|
|
|
/*
|
|
* reltimerecv - converts external binary format to reltime
|
|
*/
|
|
Datum
|
|
reltimerecv(PG_FUNCTION_ARGS)
|
|
{
|
|
StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
|
|
|
|
PG_RETURN_RELATIVETIME((RelativeTime) pq_getmsgint(buf, sizeof(RelativeTime)));
|
|
}
|
|
|
|
/*
|
|
* reltimesend - converts reltime to binary format
|
|
*/
|
|
Datum
|
|
reltimesend(PG_FUNCTION_ARGS)
|
|
{
|
|
RelativeTime time = PG_GETARG_RELATIVETIME(0);
|
|
StringInfoData buf;
|
|
|
|
pq_begintypsend(&buf);
|
|
pq_sendint(&buf, time, sizeof(time));
|
|
PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
|
|
}
|
|
|
|
|
|
static void
|
|
reltime2tm(RelativeTime time, struct pg_tm * tm)
|
|
{
|
|
double dtime = time;
|
|
|
|
FMODULO(dtime, tm->tm_year, 31557600);
|
|
FMODULO(dtime, tm->tm_mon, 2592000);
|
|
FMODULO(dtime, tm->tm_mday, SECS_PER_DAY);
|
|
FMODULO(dtime, tm->tm_hour, SECS_PER_HOUR);
|
|
FMODULO(dtime, tm->tm_min, SECS_PER_MINUTE);
|
|
FMODULO(dtime, tm->tm_sec, 1);
|
|
}
|
|
|
|
|
|
/*
|
|
* tintervalin - converts an tinterval string to internal format
|
|
*/
|
|
Datum
|
|
tintervalin(PG_FUNCTION_ARGS)
|
|
{
|
|
char *tintervalstr = PG_GETARG_CSTRING(0);
|
|
TimeInterval tinterval;
|
|
AbsoluteTime i_start,
|
|
i_end,
|
|
t1,
|
|
t2;
|
|
|
|
parsetinterval(tintervalstr, &t1, &t2);
|
|
|
|
tinterval = (TimeInterval) palloc(sizeof(TimeIntervalData));
|
|
|
|
if (t1 == INVALID_ABSTIME || t2 == INVALID_ABSTIME)
|
|
tinterval->status = T_INTERVAL_INVAL; /* undefined */
|
|
else
|
|
tinterval->status = T_INTERVAL_VALID;
|
|
|
|
i_start = ABSTIMEMIN(t1, t2);
|
|
i_end = ABSTIMEMAX(t1, t2);
|
|
tinterval->data[0] = i_start;
|
|
tinterval->data[1] = i_end;
|
|
|
|
PG_RETURN_TIMEINTERVAL(tinterval);
|
|
}
|
|
|
|
|
|
/*
|
|
* tintervalout - converts an internal tinterval format to a string
|
|
*/
|
|
Datum
|
|
tintervalout(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval tinterval = PG_GETARG_TIMEINTERVAL(0);
|
|
char *i_str,
|
|
*p;
|
|
|
|
i_str = (char *) palloc(T_INTERVAL_LEN); /* ["..." "..."] */
|
|
strcpy(i_str, "[\"");
|
|
if (tinterval->status == T_INTERVAL_INVAL)
|
|
strcat(i_str, INVALID_INTERVAL_STR);
|
|
else
|
|
{
|
|
p = DatumGetCString(DirectFunctionCall1(abstimeout,
|
|
AbsoluteTimeGetDatum(tinterval->data[0])));
|
|
strcat(i_str, p);
|
|
pfree(p);
|
|
strcat(i_str, "\" \"");
|
|
p = DatumGetCString(DirectFunctionCall1(abstimeout,
|
|
AbsoluteTimeGetDatum(tinterval->data[1])));
|
|
strcat(i_str, p);
|
|
pfree(p);
|
|
}
|
|
strcat(i_str, "\"]");
|
|
PG_RETURN_CSTRING(i_str);
|
|
}
|
|
|
|
/*
|
|
* tintervalrecv - converts external binary format to tinterval
|
|
*/
|
|
Datum
|
|
tintervalrecv(PG_FUNCTION_ARGS)
|
|
{
|
|
StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
|
|
TimeInterval tinterval;
|
|
|
|
tinterval = (TimeInterval) palloc(sizeof(TimeIntervalData));
|
|
|
|
tinterval->status = pq_getmsgint(buf, sizeof(tinterval->status));
|
|
|
|
if (!(tinterval->status == T_INTERVAL_INVAL ||
|
|
tinterval->status == T_INTERVAL_VALID))
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
|
|
errmsg("invalid status in external \"tinterval\" value")));
|
|
|
|
tinterval->data[0] = pq_getmsgint(buf, sizeof(tinterval->data[0]));
|
|
tinterval->data[1] = pq_getmsgint(buf, sizeof(tinterval->data[1]));
|
|
|
|
PG_RETURN_TIMEINTERVAL(tinterval);
|
|
}
|
|
|
|
/*
|
|
* tintervalsend - converts tinterval to binary format
|
|
*/
|
|
Datum
|
|
tintervalsend(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval tinterval = PG_GETARG_TIMEINTERVAL(0);
|
|
StringInfoData buf;
|
|
|
|
pq_begintypsend(&buf);
|
|
pq_sendint(&buf, tinterval->status, sizeof(tinterval->status));
|
|
pq_sendint(&buf, tinterval->data[0], sizeof(tinterval->data[0]));
|
|
pq_sendint(&buf, tinterval->data[1], sizeof(tinterval->data[1]));
|
|
PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
|
|
}
|
|
|
|
|
|
/*****************************************************************************
|
|
* PUBLIC ROUTINES *
|
|
*****************************************************************************/
|
|
|
|
Datum
|
|
interval_reltime(PG_FUNCTION_ARGS)
|
|
{
|
|
Interval *interval = PG_GETARG_INTERVAL_P(0);
|
|
RelativeTime time;
|
|
int year,
|
|
month,
|
|
day;
|
|
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
int64 span;
|
|
#else
|
|
double span;
|
|
#endif
|
|
|
|
year = interval->month / MONTHS_PER_YEAR;
|
|
month = interval->month % MONTHS_PER_YEAR;
|
|
day = interval->day;
|
|
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
span = ((INT64CONST(365250000) * year + INT64CONST(30000000) * month +
|
|
INT64CONST(1000000) * day) * INT64CONST(86400)) +
|
|
interval->time;
|
|
span /= USECS_PER_SEC;
|
|
#else
|
|
span = (DAYS_PER_YEAR * year + (double) DAYS_PER_MONTH * month + day) * SECS_PER_DAY + interval->time;
|
|
#endif
|
|
|
|
if (span < INT_MIN || span > INT_MAX)
|
|
time = INVALID_RELTIME;
|
|
else
|
|
time = span;
|
|
|
|
PG_RETURN_RELATIVETIME(time);
|
|
}
|
|
|
|
|
|
Datum
|
|
reltime_interval(PG_FUNCTION_ARGS)
|
|
{
|
|
RelativeTime reltime = PG_GETARG_RELATIVETIME(0);
|
|
Interval *result;
|
|
int year,
|
|
month,
|
|
day;
|
|
|
|
result = (Interval *) palloc(sizeof(Interval));
|
|
|
|
switch (reltime)
|
|
{
|
|
case INVALID_RELTIME:
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("cannot convert reltime \"invalid\" to interval")));
|
|
result->time = 0;
|
|
result->day = 0;
|
|
result->month = 0;
|
|
break;
|
|
|
|
default:
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
year = reltime / SECS_PER_YEAR;
|
|
reltime -= year * SECS_PER_YEAR;
|
|
month = reltime / (DAYS_PER_MONTH * SECS_PER_DAY);
|
|
reltime -= month * (DAYS_PER_MONTH * SECS_PER_DAY);
|
|
day = reltime / SECS_PER_DAY;
|
|
reltime -= day * SECS_PER_DAY;
|
|
|
|
result->time = (reltime * USECS_PER_SEC);
|
|
#else
|
|
TMODULO(reltime, year, SECS_PER_YEAR);
|
|
TMODULO(reltime, month, DAYS_PER_MONTH * SECS_PER_DAY);
|
|
TMODULO(reltime, day, SECS_PER_DAY);
|
|
|
|
result->time = reltime;
|
|
#endif
|
|
result->month = MONTHS_PER_YEAR * year + month;
|
|
result->day = day;
|
|
break;
|
|
}
|
|
|
|
PG_RETURN_INTERVAL_P(result);
|
|
}
|
|
|
|
|
|
/*
|
|
* mktinterval - creates a time interval with endpoints t1 and t2
|
|
*/
|
|
Datum
|
|
mktinterval(PG_FUNCTION_ARGS)
|
|
{
|
|
AbsoluteTime t1 = PG_GETARG_ABSOLUTETIME(0);
|
|
AbsoluteTime t2 = PG_GETARG_ABSOLUTETIME(1);
|
|
AbsoluteTime tstart = ABSTIMEMIN(t1, t2);
|
|
AbsoluteTime tend = ABSTIMEMAX(t1, t2);
|
|
TimeInterval tinterval;
|
|
|
|
tinterval = (TimeInterval) palloc(sizeof(TimeIntervalData));
|
|
|
|
if (t1 == INVALID_ABSTIME || t2 == INVALID_ABSTIME)
|
|
tinterval->status = T_INTERVAL_INVAL;
|
|
|
|
else
|
|
{
|
|
tinterval->status = T_INTERVAL_VALID;
|
|
tinterval->data[0] = tstart;
|
|
tinterval->data[1] = tend;
|
|
}
|
|
|
|
PG_RETURN_TIMEINTERVAL(tinterval);
|
|
}
|
|
|
|
/*
|
|
* timepl, timemi and abstimemi use the formula
|
|
* abstime + reltime = abstime
|
|
* so abstime - reltime = abstime
|
|
* and abstime - abstime = reltime
|
|
*/
|
|
|
|
/*
|
|
* timepl - returns the value of (abstime t1 + reltime t2)
|
|
*/
|
|
Datum
|
|
timepl(PG_FUNCTION_ARGS)
|
|
{
|
|
AbsoluteTime t1 = PG_GETARG_ABSOLUTETIME(0);
|
|
RelativeTime t2 = PG_GETARG_RELATIVETIME(1);
|
|
|
|
if (AbsoluteTimeIsReal(t1) &&
|
|
RelativeTimeIsValid(t2) &&
|
|
((t2 > 0 && t1 < NOEND_ABSTIME - t2) ||
|
|
(t2 <= 0 && t1 > NOSTART_ABSTIME - t2))) /* prevent overflow */
|
|
PG_RETURN_ABSOLUTETIME(t1 + t2);
|
|
|
|
PG_RETURN_ABSOLUTETIME(INVALID_ABSTIME);
|
|
}
|
|
|
|
|
|
/*
|
|
* timemi - returns the value of (abstime t1 - reltime t2)
|
|
*/
|
|
Datum
|
|
timemi(PG_FUNCTION_ARGS)
|
|
{
|
|
AbsoluteTime t1 = PG_GETARG_ABSOLUTETIME(0);
|
|
RelativeTime t2 = PG_GETARG_RELATIVETIME(1);
|
|
|
|
if (AbsoluteTimeIsReal(t1) &&
|
|
RelativeTimeIsValid(t2) &&
|
|
((t2 > 0 && t1 > NOSTART_ABSTIME + t2) ||
|
|
(t2 <= 0 && t1 < NOEND_ABSTIME + t2))) /* prevent overflow */
|
|
PG_RETURN_ABSOLUTETIME(t1 - t2);
|
|
|
|
PG_RETURN_ABSOLUTETIME(INVALID_ABSTIME);
|
|
}
|
|
|
|
|
|
/*
|
|
* intinterval - returns true iff absolute date is in the tinterval
|
|
*/
|
|
Datum
|
|
intinterval(PG_FUNCTION_ARGS)
|
|
{
|
|
AbsoluteTime t = PG_GETARG_ABSOLUTETIME(0);
|
|
TimeInterval tinterval = PG_GETARG_TIMEINTERVAL(1);
|
|
|
|
if (tinterval->status == T_INTERVAL_VALID && t != INVALID_ABSTIME)
|
|
{
|
|
if (DatumGetBool(DirectFunctionCall2(abstimege,
|
|
AbsoluteTimeGetDatum(t),
|
|
AbsoluteTimeGetDatum(tinterval->data[0]))) &&
|
|
DatumGetBool(DirectFunctionCall2(abstimele,
|
|
AbsoluteTimeGetDatum(t),
|
|
AbsoluteTimeGetDatum(tinterval->data[1]))))
|
|
PG_RETURN_BOOL(true);
|
|
}
|
|
PG_RETURN_BOOL(false);
|
|
}
|
|
|
|
/*
|
|
* tintervalrel - returns relative time corresponding to tinterval
|
|
*/
|
|
Datum
|
|
tintervalrel(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval tinterval = PG_GETARG_TIMEINTERVAL(0);
|
|
AbsoluteTime t1 = tinterval->data[0];
|
|
AbsoluteTime t2 = tinterval->data[1];
|
|
|
|
if (tinterval->status != T_INTERVAL_VALID)
|
|
PG_RETURN_RELATIVETIME(INVALID_RELTIME);
|
|
|
|
if (AbsoluteTimeIsReal(t1) &&
|
|
AbsoluteTimeIsReal(t2))
|
|
PG_RETURN_RELATIVETIME(t2 - t1);
|
|
|
|
PG_RETURN_RELATIVETIME(INVALID_RELTIME);
|
|
}
|
|
|
|
|
|
/*
|
|
* timenow - returns time "now", internal format
|
|
*
|
|
* Now AbsoluteTime is time since Jan 1 1970 -mer 7 Feb 1992
|
|
*/
|
|
Datum
|
|
timenow(PG_FUNCTION_ARGS)
|
|
{
|
|
PG_RETURN_ABSOLUTETIME(GetCurrentAbsoluteTime());
|
|
}
|
|
|
|
/*
|
|
* reltime comparison routines
|
|
*/
|
|
static int
|
|
reltime_cmp_internal(RelativeTime a, RelativeTime b)
|
|
{
|
|
/*
|
|
* We consider all INVALIDs to be equal and larger than any non-INVALID.
|
|
* This is somewhat arbitrary; the important thing is to have a consistent
|
|
* sort order.
|
|
*/
|
|
if (a == INVALID_RELTIME)
|
|
{
|
|
if (b == INVALID_RELTIME)
|
|
return 0; /* INVALID = INVALID */
|
|
else
|
|
return 1; /* INVALID > non-INVALID */
|
|
}
|
|
|
|
if (b == INVALID_RELTIME)
|
|
return -1; /* non-INVALID < INVALID */
|
|
|
|
if (a > b)
|
|
return 1;
|
|
else if (a == b)
|
|
return 0;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
Datum
|
|
reltimeeq(PG_FUNCTION_ARGS)
|
|
{
|
|
RelativeTime t1 = PG_GETARG_RELATIVETIME(0);
|
|
RelativeTime t2 = PG_GETARG_RELATIVETIME(1);
|
|
|
|
PG_RETURN_BOOL(reltime_cmp_internal(t1, t2) == 0);
|
|
}
|
|
|
|
Datum
|
|
reltimene(PG_FUNCTION_ARGS)
|
|
{
|
|
RelativeTime t1 = PG_GETARG_RELATIVETIME(0);
|
|
RelativeTime t2 = PG_GETARG_RELATIVETIME(1);
|
|
|
|
PG_RETURN_BOOL(reltime_cmp_internal(t1, t2) != 0);
|
|
}
|
|
|
|
Datum
|
|
reltimelt(PG_FUNCTION_ARGS)
|
|
{
|
|
RelativeTime t1 = PG_GETARG_RELATIVETIME(0);
|
|
RelativeTime t2 = PG_GETARG_RELATIVETIME(1);
|
|
|
|
PG_RETURN_BOOL(reltime_cmp_internal(t1, t2) < 0);
|
|
}
|
|
|
|
Datum
|
|
reltimegt(PG_FUNCTION_ARGS)
|
|
{
|
|
RelativeTime t1 = PG_GETARG_RELATIVETIME(0);
|
|
RelativeTime t2 = PG_GETARG_RELATIVETIME(1);
|
|
|
|
PG_RETURN_BOOL(reltime_cmp_internal(t1, t2) > 0);
|
|
}
|
|
|
|
Datum
|
|
reltimele(PG_FUNCTION_ARGS)
|
|
{
|
|
RelativeTime t1 = PG_GETARG_RELATIVETIME(0);
|
|
RelativeTime t2 = PG_GETARG_RELATIVETIME(1);
|
|
|
|
PG_RETURN_BOOL(reltime_cmp_internal(t1, t2) <= 0);
|
|
}
|
|
|
|
Datum
|
|
reltimege(PG_FUNCTION_ARGS)
|
|
{
|
|
RelativeTime t1 = PG_GETARG_RELATIVETIME(0);
|
|
RelativeTime t2 = PG_GETARG_RELATIVETIME(1);
|
|
|
|
PG_RETURN_BOOL(reltime_cmp_internal(t1, t2) >= 0);
|
|
}
|
|
|
|
Datum
|
|
btreltimecmp(PG_FUNCTION_ARGS)
|
|
{
|
|
RelativeTime t1 = PG_GETARG_RELATIVETIME(0);
|
|
RelativeTime t2 = PG_GETARG_RELATIVETIME(1);
|
|
|
|
PG_RETURN_INT32(reltime_cmp_internal(t1, t2));
|
|
}
|
|
|
|
|
|
/*
|
|
* tintervalsame - returns true iff tinterval i1 is same as tinterval i2
|
|
* Check begin and end time.
|
|
*/
|
|
Datum
|
|
tintervalsame(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i1 = PG_GETARG_TIMEINTERVAL(0);
|
|
TimeInterval i2 = PG_GETARG_TIMEINTERVAL(1);
|
|
|
|
if (i1->status == T_INTERVAL_INVAL || i2->status == T_INTERVAL_INVAL)
|
|
PG_RETURN_BOOL(false);
|
|
|
|
if (DatumGetBool(DirectFunctionCall2(abstimeeq,
|
|
AbsoluteTimeGetDatum(i1->data[0]),
|
|
AbsoluteTimeGetDatum(i2->data[0]))) &&
|
|
DatumGetBool(DirectFunctionCall2(abstimeeq,
|
|
AbsoluteTimeGetDatum(i1->data[1]),
|
|
AbsoluteTimeGetDatum(i2->data[1]))))
|
|
PG_RETURN_BOOL(true);
|
|
PG_RETURN_BOOL(false);
|
|
}
|
|
|
|
/*
|
|
* tinterval comparison routines
|
|
*
|
|
* Note: comparison is based on the lengths of the tintervals, not on
|
|
* endpoint value. This is pretty bogus, but since it's only a legacy
|
|
* datatype I'm not going to propose changing it.
|
|
*/
|
|
static int
|
|
tinterval_cmp_internal(TimeInterval a, TimeInterval b)
|
|
{
|
|
bool a_invalid;
|
|
bool b_invalid;
|
|
AbsoluteTime a_len;
|
|
AbsoluteTime b_len;
|
|
|
|
/*
|
|
* We consider all INVALIDs to be equal and larger than any non-INVALID.
|
|
* This is somewhat arbitrary; the important thing is to have a consistent
|
|
* sort order.
|
|
*/
|
|
a_invalid = a->status == T_INTERVAL_INVAL ||
|
|
a->data[0] == INVALID_ABSTIME ||
|
|
a->data[1] == INVALID_ABSTIME;
|
|
b_invalid = b->status == T_INTERVAL_INVAL ||
|
|
b->data[0] == INVALID_ABSTIME ||
|
|
b->data[1] == INVALID_ABSTIME;
|
|
|
|
if (a_invalid)
|
|
{
|
|
if (b_invalid)
|
|
return 0; /* INVALID = INVALID */
|
|
else
|
|
return 1; /* INVALID > non-INVALID */
|
|
}
|
|
|
|
if (b_invalid)
|
|
return -1; /* non-INVALID < INVALID */
|
|
|
|
a_len = a->data[1] - a->data[0];
|
|
b_len = b->data[1] - b->data[0];
|
|
|
|
if (a_len > b_len)
|
|
return 1;
|
|
else if (a_len == b_len)
|
|
return 0;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
Datum
|
|
tintervaleq(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i1 = PG_GETARG_TIMEINTERVAL(0);
|
|
TimeInterval i2 = PG_GETARG_TIMEINTERVAL(1);
|
|
|
|
PG_RETURN_BOOL(tinterval_cmp_internal(i1, i2) == 0);
|
|
}
|
|
|
|
Datum
|
|
tintervalne(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i1 = PG_GETARG_TIMEINTERVAL(0);
|
|
TimeInterval i2 = PG_GETARG_TIMEINTERVAL(1);
|
|
|
|
PG_RETURN_BOOL(tinterval_cmp_internal(i1, i2) != 0);
|
|
}
|
|
|
|
Datum
|
|
tintervallt(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i1 = PG_GETARG_TIMEINTERVAL(0);
|
|
TimeInterval i2 = PG_GETARG_TIMEINTERVAL(1);
|
|
|
|
PG_RETURN_BOOL(tinterval_cmp_internal(i1, i2) < 0);
|
|
}
|
|
|
|
Datum
|
|
tintervalle(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i1 = PG_GETARG_TIMEINTERVAL(0);
|
|
TimeInterval i2 = PG_GETARG_TIMEINTERVAL(1);
|
|
|
|
PG_RETURN_BOOL(tinterval_cmp_internal(i1, i2) <= 0);
|
|
}
|
|
|
|
Datum
|
|
tintervalgt(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i1 = PG_GETARG_TIMEINTERVAL(0);
|
|
TimeInterval i2 = PG_GETARG_TIMEINTERVAL(1);
|
|
|
|
PG_RETURN_BOOL(tinterval_cmp_internal(i1, i2) > 0);
|
|
}
|
|
|
|
Datum
|
|
tintervalge(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i1 = PG_GETARG_TIMEINTERVAL(0);
|
|
TimeInterval i2 = PG_GETARG_TIMEINTERVAL(1);
|
|
|
|
PG_RETURN_BOOL(tinterval_cmp_internal(i1, i2) >= 0);
|
|
}
|
|
|
|
Datum
|
|
bttintervalcmp(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i1 = PG_GETARG_TIMEINTERVAL(0);
|
|
TimeInterval i2 = PG_GETARG_TIMEINTERVAL(1);
|
|
|
|
PG_RETURN_INT32(tinterval_cmp_internal(i1, i2));
|
|
}
|
|
|
|
|
|
/*
|
|
* tintervalleneq - returns true iff length of tinterval i is equal to
|
|
* reltime t
|
|
* tintervallenne - returns true iff length of tinterval i is not equal
|
|
* to reltime t
|
|
* tintervallenlt - returns true iff length of tinterval i is less than
|
|
* reltime t
|
|
* tintervallengt - returns true iff length of tinterval i is greater
|
|
* than reltime t
|
|
* tintervallenle - returns true iff length of tinterval i is less or
|
|
* equal than reltime t
|
|
* tintervallenge - returns true iff length of tinterval i is greater or
|
|
* equal than reltime t
|
|
*/
|
|
Datum
|
|
tintervalleneq(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i = PG_GETARG_TIMEINTERVAL(0);
|
|
RelativeTime t = PG_GETARG_RELATIVETIME(1);
|
|
RelativeTime rt;
|
|
|
|
if (i->status == T_INTERVAL_INVAL || t == INVALID_RELTIME)
|
|
PG_RETURN_BOOL(false);
|
|
rt = DatumGetRelativeTime(DirectFunctionCall1(tintervalrel,
|
|
TimeIntervalGetDatum(i)));
|
|
PG_RETURN_BOOL(rt != INVALID_RELTIME && rt == t);
|
|
}
|
|
|
|
Datum
|
|
tintervallenne(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i = PG_GETARG_TIMEINTERVAL(0);
|
|
RelativeTime t = PG_GETARG_RELATIVETIME(1);
|
|
RelativeTime rt;
|
|
|
|
if (i->status == T_INTERVAL_INVAL || t == INVALID_RELTIME)
|
|
PG_RETURN_BOOL(false);
|
|
rt = DatumGetRelativeTime(DirectFunctionCall1(tintervalrel,
|
|
TimeIntervalGetDatum(i)));
|
|
PG_RETURN_BOOL(rt != INVALID_RELTIME && rt != t);
|
|
}
|
|
|
|
Datum
|
|
tintervallenlt(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i = PG_GETARG_TIMEINTERVAL(0);
|
|
RelativeTime t = PG_GETARG_RELATIVETIME(1);
|
|
RelativeTime rt;
|
|
|
|
if (i->status == T_INTERVAL_INVAL || t == INVALID_RELTIME)
|
|
PG_RETURN_BOOL(false);
|
|
rt = DatumGetRelativeTime(DirectFunctionCall1(tintervalrel,
|
|
TimeIntervalGetDatum(i)));
|
|
PG_RETURN_BOOL(rt != INVALID_RELTIME && rt < t);
|
|
}
|
|
|
|
Datum
|
|
tintervallengt(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i = PG_GETARG_TIMEINTERVAL(0);
|
|
RelativeTime t = PG_GETARG_RELATIVETIME(1);
|
|
RelativeTime rt;
|
|
|
|
if (i->status == T_INTERVAL_INVAL || t == INVALID_RELTIME)
|
|
PG_RETURN_BOOL(false);
|
|
rt = DatumGetRelativeTime(DirectFunctionCall1(tintervalrel,
|
|
TimeIntervalGetDatum(i)));
|
|
PG_RETURN_BOOL(rt != INVALID_RELTIME && rt > t);
|
|
}
|
|
|
|
Datum
|
|
tintervallenle(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i = PG_GETARG_TIMEINTERVAL(0);
|
|
RelativeTime t = PG_GETARG_RELATIVETIME(1);
|
|
RelativeTime rt;
|
|
|
|
if (i->status == T_INTERVAL_INVAL || t == INVALID_RELTIME)
|
|
PG_RETURN_BOOL(false);
|
|
rt = DatumGetRelativeTime(DirectFunctionCall1(tintervalrel,
|
|
TimeIntervalGetDatum(i)));
|
|
PG_RETURN_BOOL(rt != INVALID_RELTIME && rt <= t);
|
|
}
|
|
|
|
Datum
|
|
tintervallenge(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i = PG_GETARG_TIMEINTERVAL(0);
|
|
RelativeTime t = PG_GETARG_RELATIVETIME(1);
|
|
RelativeTime rt;
|
|
|
|
if (i->status == T_INTERVAL_INVAL || t == INVALID_RELTIME)
|
|
PG_RETURN_BOOL(false);
|
|
rt = DatumGetRelativeTime(DirectFunctionCall1(tintervalrel,
|
|
TimeIntervalGetDatum(i)));
|
|
PG_RETURN_BOOL(rt != INVALID_RELTIME && rt >= t);
|
|
}
|
|
|
|
/*
|
|
* tintervalct - returns true iff tinterval i1 contains tinterval i2
|
|
*/
|
|
Datum
|
|
tintervalct(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i1 = PG_GETARG_TIMEINTERVAL(0);
|
|
TimeInterval i2 = PG_GETARG_TIMEINTERVAL(1);
|
|
|
|
if (i1->status == T_INTERVAL_INVAL || i2->status == T_INTERVAL_INVAL)
|
|
PG_RETURN_BOOL(false);
|
|
if (DatumGetBool(DirectFunctionCall2(abstimele,
|
|
AbsoluteTimeGetDatum(i1->data[0]),
|
|
AbsoluteTimeGetDatum(i2->data[0]))) &&
|
|
DatumGetBool(DirectFunctionCall2(abstimege,
|
|
AbsoluteTimeGetDatum(i1->data[1]),
|
|
AbsoluteTimeGetDatum(i2->data[1]))))
|
|
PG_RETURN_BOOL(true);
|
|
PG_RETURN_BOOL(false);
|
|
}
|
|
|
|
/*
|
|
* tintervalov - returns true iff tinterval i1 (partially) overlaps i2
|
|
*/
|
|
Datum
|
|
tintervalov(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i1 = PG_GETARG_TIMEINTERVAL(0);
|
|
TimeInterval i2 = PG_GETARG_TIMEINTERVAL(1);
|
|
|
|
if (i1->status == T_INTERVAL_INVAL || i2->status == T_INTERVAL_INVAL)
|
|
PG_RETURN_BOOL(false);
|
|
if (DatumGetBool(DirectFunctionCall2(abstimelt,
|
|
AbsoluteTimeGetDatum(i1->data[1]),
|
|
AbsoluteTimeGetDatum(i2->data[0]))) ||
|
|
DatumGetBool(DirectFunctionCall2(abstimegt,
|
|
AbsoluteTimeGetDatum(i1->data[0]),
|
|
AbsoluteTimeGetDatum(i2->data[1]))))
|
|
PG_RETURN_BOOL(false);
|
|
PG_RETURN_BOOL(true);
|
|
}
|
|
|
|
/*
|
|
* tintervalstart - returns the start of tinterval i
|
|
*/
|
|
Datum
|
|
tintervalstart(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i = PG_GETARG_TIMEINTERVAL(0);
|
|
|
|
if (i->status == T_INTERVAL_INVAL)
|
|
PG_RETURN_ABSOLUTETIME(INVALID_ABSTIME);
|
|
PG_RETURN_ABSOLUTETIME(i->data[0]);
|
|
}
|
|
|
|
/*
|
|
* tintervalend - returns the end of tinterval i
|
|
*/
|
|
Datum
|
|
tintervalend(PG_FUNCTION_ARGS)
|
|
{
|
|
TimeInterval i = PG_GETARG_TIMEINTERVAL(0);
|
|
|
|
if (i->status == T_INTERVAL_INVAL)
|
|
PG_RETURN_ABSOLUTETIME(INVALID_ABSTIME);
|
|
PG_RETURN_ABSOLUTETIME(i->data[1]);
|
|
}
|
|
|
|
|
|
/*****************************************************************************
|
|
* PRIVATE ROUTINES *
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* parsetinterval -- parse a tinterval string
|
|
*
|
|
* output parameters:
|
|
* i_start, i_end: tinterval margins
|
|
*
|
|
* Time interval:
|
|
* `[' {` '} `'' <AbsTime> `'' {` '} `'' <AbsTime> `'' {` '} `]'
|
|
*
|
|
* OR `Undefined Range' (see also INVALID_INTERVAL_STR)
|
|
*
|
|
* where <AbsTime> satisfies the syntax of absolute time.
|
|
*
|
|
* e.g. [ ' Jan 18 1902' 'Jan 1 00:00:00 1970']
|
|
*/
|
|
static void
|
|
parsetinterval(char *i_string,
|
|
AbsoluteTime *i_start,
|
|
AbsoluteTime *i_end)
|
|
{
|
|
char *p,
|
|
*p1;
|
|
char c;
|
|
|
|
p = i_string;
|
|
/* skip leading blanks up to '[' */
|
|
while ((c = *p) != '\0')
|
|
{
|
|
if (IsSpace(c))
|
|
p++;
|
|
else if (c != '[')
|
|
goto bogus; /* syntax error */
|
|
else
|
|
break;
|
|
}
|
|
if (c == '\0')
|
|
goto bogus; /* syntax error */
|
|
p++;
|
|
/* skip leading blanks up to '"' */
|
|
while ((c = *p) != '\0')
|
|
{
|
|
if (IsSpace(c))
|
|
p++;
|
|
else if (c != '"')
|
|
goto bogus; /* syntax error */
|
|
else
|
|
break;
|
|
}
|
|
if (c == '\0')
|
|
goto bogus; /* syntax error */
|
|
p++;
|
|
if (strncmp(INVALID_INTERVAL_STR, p, strlen(INVALID_INTERVAL_STR)) == 0)
|
|
goto bogus; /* undefined range, handled like a syntax err. */
|
|
/* search for the end of the first date and change it to a \0 */
|
|
p1 = p;
|
|
while ((c = *p1) != '\0')
|
|
{
|
|
if (c == '"')
|
|
break;
|
|
p1++;
|
|
}
|
|
if (c == '\0')
|
|
goto bogus; /* syntax error */
|
|
*p1 = '\0';
|
|
/* get the first date */
|
|
*i_start = DatumGetAbsoluteTime(DirectFunctionCall1(abstimein,
|
|
CStringGetDatum(p)));
|
|
/* undo change to \0 */
|
|
*p1 = c;
|
|
p = ++p1;
|
|
/* skip blanks up to '"', beginning of second date */
|
|
while ((c = *p) != '\0')
|
|
{
|
|
if (IsSpace(c))
|
|
p++;
|
|
else if (c != '"')
|
|
goto bogus; /* syntax error */
|
|
else
|
|
break;
|
|
}
|
|
if (c == '\0')
|
|
goto bogus; /* syntax error */
|
|
p++;
|
|
/* search for the end of the second date and change it to a \0 */
|
|
p1 = p;
|
|
while ((c = *p1) != '\0')
|
|
{
|
|
if (c == '"')
|
|
break;
|
|
p1++;
|
|
}
|
|
if (c == '\0')
|
|
goto bogus; /* syntax error */
|
|
*p1 = '\0';
|
|
/* get the second date */
|
|
*i_end = DatumGetAbsoluteTime(DirectFunctionCall1(abstimein,
|
|
CStringGetDatum(p)));
|
|
/* undo change to \0 */
|
|
*p1 = c;
|
|
p = ++p1;
|
|
/* skip blanks up to ']' */
|
|
while ((c = *p) != '\0')
|
|
{
|
|
if (IsSpace(c))
|
|
p++;
|
|
else if (c != ']')
|
|
goto bogus; /* syntax error */
|
|
else
|
|
break;
|
|
}
|
|
if (c == '\0')
|
|
goto bogus; /* syntax error */
|
|
p++;
|
|
c = *p;
|
|
if (c != '\0')
|
|
goto bogus; /* syntax error */
|
|
|
|
/* it seems to be a valid tinterval */
|
|
return;
|
|
|
|
bogus:
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INVALID_DATETIME_FORMAT),
|
|
errmsg("invalid input syntax for type tinterval: \"%s\"",
|
|
i_string)));
|
|
*i_start = *i_end = INVALID_ABSTIME; /* keep compiler quiet */
|
|
}
|
|
|
|
|
|
/*****************************************************************************
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* timeofday -
|
|
* returns the current time as a text. similar to timenow() but returns
|
|
* seconds with more precision (up to microsecs). (I need this to compare
|
|
* the Wisconsin benchmark with Illustra whose TimeNow() shows current
|
|
* time with precision up to microsecs.) - ay 3/95
|
|
*/
|
|
Datum
|
|
timeofday(PG_FUNCTION_ARGS)
|
|
{
|
|
struct timeval tp;
|
|
char templ[128];
|
|
char buf[128];
|
|
text *result;
|
|
int len;
|
|
pg_time_t tt;
|
|
|
|
gettimeofday(&tp, NULL);
|
|
tt = (pg_time_t) tp.tv_sec;
|
|
pg_strftime(templ, sizeof(templ), "%a %b %d %H:%M:%S.%%06d %Y %Z",
|
|
pg_localtime(&tt, session_timezone));
|
|
snprintf(buf, sizeof(buf), templ, tp.tv_usec);
|
|
|
|
len = VARHDRSZ + strlen(buf);
|
|
result = (text *) palloc(len);
|
|
SET_VARSIZE(result, len);
|
|
memcpy(VARDATA(result), buf, len - VARHDRSZ);
|
|
PG_RETURN_TEXT_P(result);
|
|
}
|