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I finish devel. of Oracle compatible DateTime routines TO_CHAR(),

Browse Source 
TO_DATE()
and PgSQL extension FROM_CHAR().

TO_CHAR() routine allow formating text output with a datetime values:

        SELECT TO_CHAR('now'::datetime, '"Now is: "HH24:MI:SS');
        to_char
        ----------------
        Now is: 21:04:10

FROM_CHAR() routine allow convert text to a datetime:

        SELECT FROM_CHAR('September 1999 10:20:30', 'FMMonth YYYY
HH:MI:SS');
        from_char
        -----------------------------
        Wed Sep 01 10:20:30 1999 CEST

TO_DATE() is equal with FROM_CHAR(), but output a Date only:

        SELECT TO_DATE('September 1999 10:20:30', 'FMMonth YYYY
HH:MI:SS');
        to_date
        ----------
        09-01-1999


In attache is compressed dir for the contrib. All is prepared, but I'am
not
sure if Makefile is good (probably yes).

Comments & suggestions ?


Thomas, thank you for your good advices.

                                                        Karel


------------------------------------------------------------------------------

Karel Zak <zakkr@zf.jcu.cz>
http://home.zf.jcu.cz/~zakkr/
This commit is contained in:
Bruce Momjian
1999-11-29 23:26:18 +00:00
parent 1f747c6722
commit 1c5aec60bb
10 changed files with 1878 additions and 0 deletions
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71
contrib/dateformat/test/rand_datetime.c Normal file
View File

@@ -0,0 +1,71 @@
#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include <stdlib.h>
char *month[] = {
"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec",NULL
};
char *day[] = { "Sun","Mon","Tue","Wed","Thu","Fri","Sat", NULL };
int num(FILE *f, int min, int max)
{
int x, y, one;
one = x = fgetc(f);
if (x < min)
x = min;
else if (x > max) {
while(x > max)
x /= 2;
return x;
}
do {
y = fgetc(f);
if ((x+y) > max)
return x;
x += y;
} while(--one > 0);
return x;
}
int main(int argc, char **argv)
{
FILE *f;
int count;
if (argc < 5) {
printf("\nUsage: %s <randfile> <num> <prefix> <postfix>\n", argv[0]);
printf("\n(C) Karel Zak - Zakkr 1999\n\n");
exit(1);
}
if ((f = fopen(argv[1], "r")) == NULL) {
perror(argv[1]);
exit(1);
}
count = atoi(argv[2]);
for(; count > 0; --count) {
fprintf(stdout, "%s%s %02d %s %02d:%02d:%02d %d%s\n",
argv[3],
day[ num(f, 0, 6) ],
num(f, 1, 28),
month[ num(f, 0, 11) ],
num(f, 0, 23),
num(f, 0, 59),
num(f, 0, 59),
num(f, 0, 9999),
argv[4]
);
}
exit(0);
}