09-10-2008
passing regular expressions to mysql via $1
hi, unix and mysql gurus.
i'm trying to create a simple ksh script that accesses the mysql system database table, user. the idea is that the user can call the script with a regular expression to see some users, or call it without any options to see all users. this is what i have so far:
*****************************************************
mysql -BCNnqs --disable-pager -u system -pmanager << EOJ
use mysql;
set @regex = '$1';
select user from user where user REGEXP @regex;
quit
EOJ
*****************************************************
the problem, of course, is that if $1 is null, i get this error:
==> ERROR 1139 (42000) at line 8: Got error 'empty (sub)expression' from regexp
i changed my set statement to this, but it didn't work:
*****************************************************
set @regex = if(@regex is null, '^[a-z]','$1');
*****************************************************
does anyone know what i'm doing wrong? i'd appreciate your input. thanks.
10 More Discussions You Might Find Interesting
1. Programming
How do I use the regular expressions in c++? (2 Replies)
Discussion started by: szzz
2 Replies
2. Shell Programming and Scripting
Hi,
can anyone advise me how to shorten this:
if || ; then
I tried but it dosent seem to work, whats the correct way.
Cheers (4 Replies)
Discussion started by: jack1981
4 Replies
3. Shell Programming and Scripting
I have following content in the file
CancelPolicyMultiLingual3=U|PC3|EN
RestaurantInfoCode1=U|restID1|1
.....
I am trying to use following matching extression
\|(+)
to get this
PC3|EN
restID1|1
Obviously it does not work.
Any ideas? (13 Replies)
Discussion started by: arushunter
13 Replies
4. UNIX for Dummies Questions & Answers
how to find for a file whose name has all characters in uppercase after 'project'?
I tried this:
find . -name 'project**.pdf'
./projectABC.pdf
./projectABC123.pdf
I want only ./projectABC.pdf
What is the regular expression that correponds to "all characters are capital"?
thanks (8 Replies)
Discussion started by: melanie_pfefer
8 Replies
5. UNIX for Advanced & Expert Users
Hi,
below is a piece of code written by my predecessor at work.
I'm kind of a newbie and am trying to figure out all the regular expressions in this piece of code.
It is really a tough time for me to figure out all the regular expressions.
Please shed some light on the regular expressions... (3 Replies)
Discussion started by: ramky79
3 Replies
6. Shell Programming and Scripting
Hi,
In ksh, I am trying to compare folder names having -141- in it's name.
e.g.: 4567-141-8098 should match this expression '*-141-*'
but, -141-2354 should fail when compared with '*-141-*'
simlarly, abc should fail when compared with '*-141-*'
I tried multiple things but nevertheless,... (5 Replies)
Discussion started by: jidsh
5 Replies
7. Shell Programming and Scripting
need a regex that matches when a number has a zero (0) at the end of it
so like
10
20
120
30
330
1000
and so on (6 Replies)
Discussion started by: linuxkid
6 Replies
8. Shell Programming and Scripting
I have a file that I'm trying to find all the cases of phone number extensions and deleting them. So input file looks like:
abc
x93825
def
13234
x52673
hello
output looks like:
abc
def
13234
hello
Basically delete lines that have 5 numbers following "x". I tried: x\(4) but it... (7 Replies)
Discussion started by: pxalpine
7 Replies
9. Shell Programming and Scripting
Hi
Ilove unix and alwyas trying to to learn unix,but i am weak in using regular expressions.can you please give me a littel brief discription that how can i understand them and how to use .your response could lead a great hand in my unix love. (1 Reply)
Discussion started by: manoj attri
1 Replies
10. Shell Programming and Scripting
I need to pick a part of string lets stay started with specific character and end with specific character to replace using sed command
the line is like this:my audio book 71-skhdfon1dufgjhgf8.wav'
I want to move the characters beginning with - end before.
I have different files with random... (2 Replies)
Discussion started by: XP_2600
2 Replies
LEARN ABOUT DEBIAN
bp_meta_gff
BP_META_GFF(1p) User Contributed Perl Documentation BP_META_GFF(1p)
NAME
bp_meta_gff.pl - Get/set Bio::DB::GFF meta-data
SYNOPSIS
# set the following meta data values
% bp_meta_gff.pl -d testdb tag1=value1 tag2=value2
# get the indicated meta data value
% bp_meta_gff.pl -d testdb tag1 tag2
DESCRIPTION
This script gets or sets metadata in a Bio::DB::GFF database. Not all adaptors support this operation! To set a series of tags, pass a
set of tag=value pairs to the script. To get the contents of a series of tags, pass the bare tag names.
The output from the get operation will be an easily parseable set of tag=value pairs, one per line.
COMMAND-LINE OPTIONS
Command-line options can be abbreviated to single-letter options. e.g. -d instead of --database.
--database <dsn> Mysql database name (default dbi:mysql:test)
--adaptor <adaptor> Mysql adaptor (default dbi::mysqlopt)
--user <user> Username for mysql authentication
--pass <password> Password for mysql authentication
SEE ALSO
Bio::DB::GFF
AUTHOR
Lincoln Stein, lstein@cshl.org
Copyright (c) 2002 Cold Spring Harbor Laboratory
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See DISCLAIMER.txt for
disclaimers of warranty.
perl v5.14.2 2012-03-02 BP_META_GFF(1p)