Guang,
I agree with your analysis, looping on characters is not the faster you can do,
simply because there is a significant overhead (compared to C code for instance) in a
language such as PL/SQL - which might be perfectly acceptable in some circumstances,
much less so in very repetitive
Hi Stephane:
Thanks for your good suggestion. I compared the method you suggested and the orginal
one and it indeed boosted the performance (in my simple test). However the ONLY
problem I am having is that by doing TRANSLATE, I lost the original delimits. The new
method (you suggested)
Perl is a good tool for text processing. But our program is already written
in pl/sql long time ago and there are intensive db calls in this pl/sql
program. (text processing is only part of it). So I can not change that.
BTW I did a comparison study a while ago for some of our pl/sql packages
Guang,
Well you are almost there ... you need fifo structure namely a pl/sql array
1. create a local pl/sql array to store the delimiter (store the ascii value of the
delimiter to be safe) my_array (varchar2(5))
2. as you find a delimiter insert into the first position in the array and
PL/SQL is the fastest thing of them all when it comes to executing
SQL commands, but there are things which simply aren't practical
in 9.2 PL/SQL. Regular expression processing is one of those things.
Fortunately, you can mix the two. Without DBI, perl scripts simply
woudn't be very useful. Of
Would extproc_perl fit well enough, though, until 10g is here?
On Fri, 21 Nov 2003, Mladen Gogala wrote:
PL/SQL is the fastest thing of them all when it comes to executing
SQL commands, but there are things which simply aren't practical
in 9.2 PL/SQL. Regular expression processing is one of
Hi:
In my pl/sql program, I want to process each word in a string. The
string is selected from a varchar2(300) column. The delimit that separates
the words is not necessary space character. The definition of the delimit
in this program is set as
1. Any character that is NOT AlphaNumerical (0-9,
I don't know about PL/SQL but here is how I would get separate words from a big string:
#!/usr/bin/perl -w
use strict;
my (@ARR);
while () {
chomp;
@ARR = split(/[^0-9a-zA-Z_\.,]/);
foreach (@ARR) {
print $_\n;
}
}
There is something called DBI and it can be used to
