Hello all,
I was looking at the translate function and I think that it does not
behave quite right. I modified the translate function in
oracle_compat.c (included below) to make work more like its Oracle
counterpart. It seems to work but it returns the following message:NOTICE: PortalHeapMemoryFree: 0x8241fcc not in
allocset!
Below are the Oracle and Postgres session transcripts.
select translate('edwin', 'wi', 'af') from dual;
ORACLE:
TRANS
-----
edafn
1 row selected.
POSTGRES
translate
---------
edain
(1 row)
select translate('edwin', 'wi', 'a') from dual;
ORACLE
TRAN
----
edan
1 row selected.
POSTGRES
translate
---------
edain
(1 row)
select length(translate('edwin', 'wi', 'a')) from dual;
ORACLE
LENGTH(TRA
---------- 4
1 row selected.
POSTGRES
length
------ 5
(1 row)
-----------------------NEW
FUNCTION--------------------------------------
text *
translate(text *string, text *from, text *to)
{text *ret;char *ptr_ret, *from_ptr, *to_ptr, *source, *target, *temp, rep;int m, fromlen, tolen,
retlen,i;
if ((string == (text *) NULL) || ((m = VARSIZE(string) - VARHDRSZ) <= 0)) return string;
target = (char *) palloc(VARSIZE(string) - VARHDRSZ);source = VARDATA(string);temp = target;
fromlen = VARSIZE(from) - VARHDRSZ;from_ptr = VARDATA(from);tolen = VARSIZE(to) - VARHDRSZ;to_ptr =
VARDATA(to);retlen= 0;while (m--){ rep = *source; for(i=0;i<fromlen;i++) { if(from_ptr[i] == *source) { if(i
<tolen) { rep = to_ptr[i]; } else { rep = 0; } break; } } if(rep != 0) { *target++ = rep;
retlen++; } source++;}
ret = (text *) palloc(retlen + VARHDRSZ);VARSIZE(ret) = retlen + VARHDRSZ;ptr_ret = VARDATA(ret);for(i=0;i<retlen;i++)
{ *ptr_ret++ = temp[i];}pfree(target);return ret;
}
Thanks,
Edwin S. Ramirez
