Neo: There is no compelling reason to delete this (almost) duplicate reply. It shows a different order / perspective. So, I restored this post (undeleted) it.
Hi all,
I was wondering if anyone knew a good/safe way to update a single column in a table that could contain upto 8 million rows...
simple command like:
UPDATE set blah=foo where bar=XXX;
I will be running this on tables being written to and tables that have already been created.
... (3 Replies)
Hello.
I'm not sure how I can get around this, or what I am doing wrong, but I need some help. :)
I want to do an select query looking like this:
SELECT venue, SUM( amount )
FROM IWD
WHERE venue = 'Foxy Hollow'
Unfortunately I need to have spaces in the names in these fields,
is... (10 Replies)
Hi All,
I need to update 2 rows in my file. But i can do only one row update by sed command. Please help me how can i change mutltiple rows in single sed commana
my i/p file: (example.txt)
record
integer (10) present_id;
string (10) first_name;
string (10) last_name;
string... (2 Replies)
Hello,
Met a problem when I tried to insert rows to MySQL database from an old book that fits my learning level (MySQL and Perl for the Web, by Paul DuBois, 2001). First, under mysql console I created a database: webdb and the table: todo. Then I draft the perl-cgi script to have online page.... (0 Replies)
I feel stupid for asking this because it seems that MYSQL code isn't working the way that I think it should work.
Basically I wrote code like this:
select * from `Test_DC_Trailer` HAVING max(DR_RefKey);
Where the DR_RefKey is a unique numeric field that is auto iterated (like a primary key)... (7 Replies)
Hi, i want to create a table automatically based on another table (sms_key).
For example;
If user create a new row with sms_keyword field: IRC then a table created automatically (with some field on it, like: name, ph_number, messages).
select * from sms_key;
+-------------+
|... (1 Reply)
Dear community,
I have to split string in table and list all values. I'll skip the code and jump directly to mysql query.
This is the table:
category title
======= =======
7,3 title 1
1,3 title 2
1,2,3 title 3
Now, what I need is split category into single... (2 Replies)
Right I have a MYSQL database with table1 with 3 columns, colA, colB and colC. I want to combine the data in the 3 columns into a 4th column names col_comb. Here's the SQL command that works:
UPDATE table1 SET `col_comb` = CONCAT( `colA` , ' - ', `colB` , ', ', `colC` );
So now I want this... (5 Replies)
Discussion started by: barrydocks
5 Replies
LEARN ABOUT REDHAT
mod-active
MOD-ACTIVE(8) System Manager's Manual MOD-ACTIVE(8)NAME
mod-active - batch processing of ctlinnd newgroup/rmgroup/changegroup
SYNOPSIS
mod-active [ ctlinnd_command_file ]
DESCRIPTION
mod-active is a perl script that updates the active file based on its input lines of ctlinnd newgroup, rmgroup and changegroup commands.
It pauses the server briefly while the existing active file is read and rewritten, which not only keeps innd from updating the active file
but also locks against other instances of mod-active.
The input to mod-active can come either from one or more files named on the command line, or from the standard input. Typically its input
is the output from the docheckgroups or actsync commands. Every line which contains the string "ctlinnd newgroup", "ctlinnd rmgroup" or
"ctlinnd changegroup", optionally preceded by whitespace and/or the path to ctlinnd, is noted for the update. Redundant commands, such as
a newgroup directive for a group that already exists, are silently ignored. All other lines in the input are also silently ignored.
After the new active file has been generated, the existing one is renamed to active.old and the new one is moved into place. The script
then displays the differences between the two files.
Any groups that were added to the active file are also added to the active.times file with the string "checkgroups-update".
BUGS
Though innd is paused while mod-active works, it is not inconceivable that there could be a conflict if something else tries to update the
active file during the relatively short time that mod-active is working. The two most realistic ways I can think of for this to happen are
either by an administrator concurrently doing a manual ctlinnd command, or by innd receiving a control message, then mod-active pausing the
server, then the control message handler script that innd forked running its own ctlinnd command while mod-active is working. I've been
using mod-active regularly for several years, though, and never had either problem.
HISTORY
Written by David C Lawrence <tale@isc.org>.
SEE ALSO active(5), actsync(8), ctlinnd(8), innd(8).
MOD-ACTIVE(8)