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Commit18aee79

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committed
Allow timezone names in SQL strings,
'2006-05-24 21:11 Americas/New_York'::timestamptzJoachim Wieland
1 parent51dfe35 commit18aee79

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1 file changed

+66
-5
lines changed

1 file changed

+66
-5
lines changed

‎src/backend/utils/adt/datetime.c

Lines changed: 66 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/backend/utils/adt/datetime.c,v 1.166 2006/03/05 15:58:41 momjian Exp $
11+
* $PostgreSQL: pgsql/src/backend/utils/adt/datetime.c,v 1.167 2006/06/07 22:32:31 momjian Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -22,6 +22,7 @@
2222

2323
#include"access/xact.h"
2424
#include"miscadmin.h"
25+
#include"utils/builtins.h"
2526
#include"utils/datetime.h"
2627
#include"utils/guc.h"
2728

@@ -36,6 +37,7 @@ static int DecodeTime(char *str, int fmask, int *tmask,
3637
structpg_tm*tm,fsec_t*fsec);
3738
staticintDecodeTimezone(char*str,int*tzp);
3839
staticintDecodePosixTimezone(char*str,int*tzp);
40+
staticintDecodeZicTimezone(char*str,int*tzp,structpg_tm*tm);
3941
staticdatetkn*datebsearch(char*key,datetkn*base,unsignedintnel);
4042
staticintDecodeDate(char*str,intfmask,int*tmask,structpg_tm*tm);
4143
staticvoidTrimTrailingZeros(char*str);
@@ -888,8 +890,24 @@ ParseDateTime(const char *timestr, char *workbuf, size_t buflen,
888890
{
889891
chardelim=*cp;
890892

891-
ftype[nf]=DTK_DATE;
892-
APPEND_CHAR(bufp,bufend,*cp++);
893+
if (*cp=='/')
894+
{
895+
ftype[nf]=DTK_TZ;
896+
/* set the first character of the region to upper case
897+
* again*/
898+
field[nf][0]=pg_toupper((unsignedchar)field[nf][0]);
899+
/* we have seen "Region/" of a POSIX timezone, continue to
900+
* read the City part */
901+
do {
902+
APPEND_CHAR(bufp,bufend,*cp++);
903+
/* there is for example America/New_York */
904+
}while (isalpha((unsignedchar)*cp)||*cp=='_');
905+
}
906+
else
907+
{
908+
ftype[nf]=DTK_DATE;
909+
APPEND_CHAR(bufp,bufend,*cp++);
910+
}
893911
while (isdigit((unsignedchar)*cp)||*cp==delim)
894912
APPEND_CHAR(bufp,bufend,*cp++);
895913
}
@@ -980,6 +998,7 @@ DecodeDateTime(char **field, int *ftype, int nf,
980998
boolhaveTextMonth= FALSE;
981999
intis2digits= FALSE;
9821000
intbc= FALSE;
1001+
intzicTzFnum=-1;
9831002

9841003
/*
9851004
* We'll insist on at least all of the date fields, but initialize the
@@ -1127,7 +1146,15 @@ DecodeDateTime(char **field, int *ftype, int nf,
11271146
if (tzp==NULL)
11281147
returnDTERR_BAD_FORMAT;
11291148

1130-
dterr=DecodeTimezone(field[i],&tz);
1149+
if (strchr(field[i],'/')!=NULL)
1150+
{
1151+
/* remember to apply the timezone at the end */
1152+
zicTzFnum=i;
1153+
tmask=DTK_M(TZ);
1154+
break;
1155+
}
1156+
else
1157+
dterr=DecodeTimezone(field[i],&tz);
11311158
if (dterr)
11321159
returndterr;
11331160

@@ -1605,6 +1632,19 @@ DecodeDateTime(char **field, int *ftype, int nf,
16051632
if (tm->tm_mday>day_tab[isleap(tm->tm_year)][tm->tm_mon-1])
16061633
returnDTERR_FIELD_OVERFLOW;
16071634

1635+
if (zicTzFnum!=-1)
1636+
{
1637+
DatumtsTz;
1638+
Timestamptimestamp;
1639+
tm2timestamp(tm,*fsec,NULL,&timestamp);
1640+
tsTz=DirectFunctionCall2(timestamp_zone,
1641+
DirectFunctionCall1(textin,
1642+
CStringGetDatum(field[zicTzFnum])),
1643+
TimestampGetDatum(timestamp));
1644+
timestamp2tm(DatumGetTimestampTz(tsTz),tzp,tm,fsec,NULL,NULL);
1645+
fmask &= ~DTK_M(TZ);
1646+
}
1647+
16081648
/* timezone not specified? then find local timezone if possible */
16091649
if (tzp!=NULL&& !(fmask&DTK_M(TZ)))
16101650
{
@@ -1874,7 +1914,15 @@ DecodeTimeOnly(char **field, int *ftype, int nf,
18741914
if (tzp==NULL)
18751915
returnDTERR_BAD_FORMAT;
18761916

1877-
dterr=DecodeTimezone(field[i],&tz);
1917+
if (strchr(field[i],'/')!=NULL)
1918+
{
1919+
/* a date has to be specified */
1920+
if ((fmask&DTK_DATE_M)!=DTK_DATE_M)
1921+
returnDTERR_BAD_FORMAT;
1922+
dterr=DecodeZicTimezone(field[i],&tz,tm);
1923+
}
1924+
else
1925+
dterr=DecodeTimezone(field[i],&tz);
18781926
if (dterr)
18791927
returndterr;
18801928

@@ -2924,6 +2972,19 @@ DecodePosixTimezone(char *str, int *tzp)
29242972
return0;
29252973
}
29262974

2975+
staticint
2976+
DecodeZicTimezone(char*str,int*tzp,structpg_tm*tm)
2977+
{
2978+
structpg_tz*tz;
2979+
2980+
tz=pg_tzset(str);
2981+
if (!tz)
2982+
returnDTERR_BAD_FORMAT;
2983+
2984+
*tzp=DetermineTimeZoneOffset(tm,tz);
2985+
2986+
return0;
2987+
}
29272988

29282989
/* DecodeSpecial()
29292990
* Decode text string using lookup table.

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