10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hello.
Here is a file contents :
declare -Ax NEW_FORCE_IGNORE_ARRAY=(="§" ="§" ="§" ="§" ="§" .................. ="§"Here is a pattern
=I want to extract 'NEW_FORCE_IGNORE_ARRAY' which is the whole word before the first occurrence of pattern '='
Is there a better solution than mine :... (3 Replies)
Discussion started by: jcdole
3 Replies
2. UNIX for Dummies Questions & Answers
I have a large file and many lines are duplicated. I'm trying to delete lines with every second occurrence of a pattern. Did tried searching similar question but no luck.
I can delete all lines matching pattern with :g/pattern/d but don't want to lose data.
Sample pattern to delete... (6 Replies)
Discussion started by: homer4all
6 Replies
3. Shell Programming and Scripting
Hi,
I have a simple problem but i guess stupid enough to figure it out. i have thousands rows of data. and i need to find match patterns of two columns and print the number of rows. for example:
inputfile
abd abp 123
abc abc 325
ndc ndc 451
mjk lkj... (3 Replies)
Discussion started by: redse171
3 Replies
4. Shell Programming and Scripting
Hi,
Do anybody know how to use awk to count the pattern at specific column?
Input file
M2A928K 419 ath-miR159a,gma-miR159a-3p,ptc-miR159a 60 miR235a
.
.
Output file
M2A928K 419 ath-miR159a,gma-miR159a-3p,ptc-miR159a 60 miR235a 3
.
.
I plan to count how many "miR" in column 3... (2 Replies)
Discussion started by: cpp_beginner
2 Replies
5. Linux
Hi
I have to replace a pattern found in the first uncommented line in a file. The challenge I'm facing is there are several such similar lines but I have to edit only the first uncommented line.
Eg:
#this is example
#/root/xyz:Old_Pattern
/root/xyz:Old_Pattern
/root/xyz:Old_Pattern
... (10 Replies)
Discussion started by: Stoner008
10 Replies
6. Shell Programming and Scripting
Hello all,
I have a input file like this.
input file
---------------
abc ab001 + ab002 zca
acb ab006 + ab007 caz
cba ab003 + ab004 zca
bac ab004 - ab005 zac
bca ab002 - ab003 cza
cba ab005 + ab006 acz
cba ab005 ... (5 Replies)
Discussion started by: admax
5 Replies
7. Shell Programming and Scripting
hi,
is it possible to find the number of occurences of a pattern between two paranthesis.
for e.g
i have a file as below.
>>{
>>hi
>>GoodMorning
>>how are you?
>>}
>>is it good,
>>tell me yes, if it is good
In the above file, its clear the occurence of word "Good"... (17 Replies)
Discussion started by: divak
17 Replies
8. Shell Programming and Scripting
I would like to use sed to replace one occurence of a pattern in a file. When I use the s/// command it replaces all occurences of the pattern in the file. Should I be using something other than sed?
Thanks (6 Replies)
Discussion started by: ss9u
6 Replies
9. Shell Programming and Scripting
Hi
I need a perl onliner which seaches a line starting with a pattern(last occurence) and display it.
similar to
grep 'pattern' filename | tail -1 in UNIX
Ex: I want to display the line starting with "cool" and which is a last occurence
adadfadafadf
adfadadf
cool dfadfadfadfara... (4 Replies)
Discussion started by: ammu
4 Replies
10. UNIX for Dummies Questions & Answers
How can we find the number of occurence of a specified pattern in a file?
This command would be a part of a shell script. (5 Replies)
Discussion started by: videsh77
5 Replies
SET
ROLE(7) SQL Commands SET ROLE(7)
NAME
SET ROLE - set the current user identifier of the current session
SYNOPSIS
SET [ SESSION | LOCAL ] ROLE rolename
SET [ SESSION | LOCAL ] ROLE NONE
RESET ROLE
DESCRIPTION
This command sets the current user identifier of the current SQL session to be rolename. The role name can be written as either an identi-
fier or a string literal. After SET ROLE, permissions checking for SQL commands is carried out as though the named role were the one that
had logged in originally.
The specified rolename must be a role that the current session user is a member of. (If the session user is a superuser, any role can be
selected.)
The SESSION and LOCAL modifiers act the same as for the regular SET [set(7)] command.
The NONE and RESET forms reset the current user identifier to be the current session user identifier. These forms can be executed by any
user.
NOTES
Using this command, it is possible to either add privileges or restrict one's privileges. If the session user role has the INHERITS
attribute, then it automatically has all the privileges of every role that it could SET ROLE to; in this case SET ROLE effectively drops
all the privileges assigned directly to the session user and to the other roles it is a member of, leaving only the privileges available to
the named role. On the other hand, if the session user role has the NOINHERITS attribute, SET ROLE drops the privileges assigned directly
to the session user and instead acquires the privileges available to the named role.
In particular, when a superuser chooses to SET ROLE to a non-superuser role, she loses her superuser privileges.
SET ROLE has effects comparable to SET SESSION AUTHORIZATION [set_session_authorization(7)], but the privilege checks involved are quite
different. Also, SET SESSION AUTHORIZATION determines which roles are allowable for later SET ROLE commands, whereas changing roles with
SET ROLE does not change the set of roles allowed to a later SET ROLE.
SET ROLE does not process session variables as specified by the role's ALTER ROLE [alter_role(7)] settings; this only happens during login.
SET ROLE cannot be used within a SECURITY DEFINER function.
EXAMPLES
SELECT SESSION_USER, CURRENT_USER;
session_user | current_user
--------------+--------------
peter | peter
SET ROLE 'paul';
SELECT SESSION_USER, CURRENT_USER;
session_user | current_user
--------------+--------------
peter | paul
COMPATIBILITY
PostgreSQL allows identifier syntax ("rolename"), while the SQL standard requires the role name to be written as a string literal. SQL does
not allow this command during a transaction; PostgreSQL does not make this restriction because there is no reason to. The SESSION and
LOCAL modifiers are a PostgreSQL extension, as is the RESET syntax.
SEE ALSO
SET SESSION AUTHORIZATION [set_session_authorization(7)]
SQL - Language Statements 2010-05-14 SET ROLE(7)