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egrep question

bob hollis
Frequent Advisor

egrep question

I am using egrep to pick some information out of an Oracle export.
I am using the following:
cat export.dmp|egrep "F983051|F98306|F98720|F98740|F98741|F98743"
What is the maximum length of the string I can use? It seems if I put too many table names in the string I get no results.
Any other ideas how to do this?
Massimo Bianchi
Honored Contributor

Re: egrep question

You can use a file, with the option -f "filename"

Massimo Bianchi
Honored Contributor

Re: egrep question

thinking a little more: would it ne more usefull if you do a fake import ?

egrep-ping an oracle dump is not very usefull, but an import with

indexfile=file1.txt show=y

will be more usefull

Francisco J. Soler
Honored Contributor

Re: egrep question

Hi, you can do it with awk.

cat export.dmp | awk '

It is not needed the print statement because is the default one.

Linux?. Yes, of course.
john korterman
Honored Contributor

Re: egrep question

Hi Bob,
I do not know the limit, but perhaps you can shorten your reg. expression string by organizing it for matching ranges, e.g.:
# egrep "F9830[5-6]*|F987[1-2][0-1]" export.dmp

which will match the strings:
F98305 + whatever comes after
F98306 + whatever comes after

John K.
it would be nice if you always got a second chance
Esteemed Contributor

Re: egrep question


You can use perl,

open (FH, filename);

foreach ()
if (/F983051|F98306|F98720|F98740|F98741/)
print "Found: $_";
close (FH);