everyone!
I want to know what this line does:
sqlplus -s /nolog <<EOF
Any ideas?
Thanks for the help!
From the information that you provided in the comments:
sqlplus -s /nolog <<EOF
Fires up an instance of sqlplus with silent mode enabled (which, I believe, doesn't send out any output to the console screen), and without a login explicitly provided (hence the /nolog), and it's taking input from the string contained in the EOF heredoc (which probably contains login credentials).
Here is a quick overview of Oracle's documentation on sqlplus.
From HERE:
-s The silent option: it suppreses the output of the SQL*Plus banner, the command prompt and the echoing of commands.
/nolog Starts SQL*Plus but does not log on (connect) a user/session.
So it seems that starts SQL*PLUS without logging on a user/session (nolog option) and don't display info (silent option).
The full excerpt should probably be:
sqlplus -s /nolog << ABCDE
CONNECT user/pwd#database
-- DO SQL AND PLSQL STUFF
EXIT
ABCDE
Which is similar to running sqlplus -s user/pwd#database #script.sql where script.sql contains the sql, plsql stuff and the exit command. The << syntax is shell operator for heredoc, which means all following lines are variable-expanded if ${variables} are found, and the first line beginning with ABCDE (at the very beginning of the line, no spaces, no tabs) ends the input.
Related
I have a ksh script that comes to a point where it must run a long running command. The long running command is executed via a heredoc in the script presently. I want to throw the command (represented by cat in my samples below) into the background but only after taking its input from the heredoc. Since the "nohup cat.." finishes instantaneously and I see an empty nohup.out file, I am not sure the script is doing what I need it to do, which is to spawn a nohupped version of the heredoc command and exit, leaving the command to run for however long it takes to complete.
I am using cat as the "command" since it too sits there and just waits for console input.
Working version without nohupping:
#!/bin/ksh
cat << EOF
Hello
World
HOw are you!
EOF
Trying to nohup the heredoc:
#!/bin/ksh
nohup cat <<EOF
Hello
World
HOw are you!
EOF
Seems to work, output is going into nohup.out as expected. But now, how to throw that into the background? I tried the below (and many variations of it) :
#!/bin/ksh
nohup cat & <<EOF
Hello
World
HOw are you!
EOF
but, nohup.out is empty, so I am not sure what the above is doing. There is no running "cat" in the background which tells me it ran and completed at least - or maybe didn't run at all. No other variation I can invent for trying to throw the heredoc into the background from my ksh script works.
Any suggestions on a way to achieve this using heredoc?
Here are two options.
You could try wrapping the nohup sequence inside a function, which may look cleaner, and then invoking that function with the trailing ampersand.
Using a function, like this:
#!/bin/ksh
function dostuff
{
nohup cat <<- END
Hello
World
How are you!
END
}
dostuff &
wait
You can also try wrapping the commands to be backgrounded into a grouping { } block, separating each command with a ; inside the brackets, and then backgrounding that block via:
{ nohup cat <<- EOF
...
EOF
; whatever
} &
I am running a file via batch file
Batch File:
sqlplus admin/admin#SERVER #abc.sql > output.txt
SQL File abc.sql:
set PAGESIZE 1000
set LINESIZE 550
set echo off
set head off
set FEEDBACK OFF
select * from S_ABC
exit;
Output.txt:
Connected To:
Oracle Database 11g................................
.
.
.
DATA
.
.
Disconnected from Oracle Database 11g .......
.
.
Please help me remove the extra data, in the starting and end of output.txt file.
-S seems to be what you're looking for;
sqlplus -S admin/admin#SERVER #abc.sql > output.txt
-S[ILENT]
Suppresses all SQL*Plus information and prompt messages, including the command prompt, the echoing of commands, and the banner normally displayed when you start SQL*Plus. If you omit username or password, SQL*Plus prompts for them, but the prompts are not visible. Use SILENT to invoke SQL*Plus within another program so that the use of SQL*Plus is invisible to the user.
how to declare variable in bash command. See "?"
I thought we could almost run any bash statement with ! or host in front of line
#!/bin/bash
sqlplus scott/tiger#orcl << EOF
! export v10="Hi" Doesn't work, why?
! echo $v10 Doesn't work, why?
! echo "Done" Works perfectly and also other bash commands
select * from dept; Works perfectly
exit
EOF
Thank you
What #jordanm says "probably" is exactly what is happening. When you specify a host command from within sqlplus, a separate shell process is spawned, the command executed by that process, then that process is terminated and control returns to sqlplus. Any environment variables that are set in that child shell process are good only within it, so when it terminates, they are gone.
As for your specific lines that "work" and "don't work" .. "export v10="Hi" does work but there is no stdout display of the 'export' command, and as explained, that variable v10 ceases to exist once the child process completes and control returns to sqlplus. The "echo $v10" also works, but since that is a new shell process, it has no value for $v10, so there is nothing to echo.
What are you trying to accomplish by setting enviornment variables from within sqlplus?
found it, all I had to do was
<< EOF
whenever sqlerror exit failure rollback
whenever oserror exit failure rollback
#scriptname.sql
EXIT
EOF
I have an expect script which I need to run every 3 mins on my management node to collect tx/rx values for each port attached to DCX Brocade SAN Switch using the command #portperfshow#
Each time I try to use crontab to execute the script every 3 mins, the script does not work!
My expect script starts with #!/usr/bin/expect -f and I am calling the script using the following syntax under cron:
3 * * * * /usr/bin/expect -f /root/portsperfDCX1/collect-all.exp sanswitchhostname
However, when I execute the script (not under cron) it works as expected:
root# ./collect-all.exp sanswitchhostname
works just fine.
Please Please can someone help! Thanks.
The script collect-all.exp is:
#!/usr/bin/expect -f
#Time and Date
set day [timestamp -format %d%m%y]
set time [timestamp -format %H%M]
#logging
set LogDir1 "/FPerf/PortsLogs"
et timeout 5
set ipaddr [lrange $argv 0 0]
set passw "XXXXXXX"
if { $ipaddr == "" } {
puts "Usage: <script.exp> <ip address>\n"
exit 1
}
spawn ssh admin#$ipaddr
expect -re "password"
send "$passw\r"
expect -re "admin"
log_file "$LogDir1/$day-portsperfshow-$time"
send "portperfshow -tx -rx -t 10\r"
expect timeout "\n"
send \003
log_file
send -- "exit\r"
close
I had the same issue, except that my script was ending with
interact
Finally I got it working by replacing it with these two lines:
expect eof
exit
Changing interact to expect eof worked for me!
Needed to remove the exit part, because I had more statements in the bash script after the expect line (calling expect inside a bash script).
There are two key differences between a program that is run normally from a shell and a program that is run from cron:
Cron does not populate (many) environment variables. Notably absent are TERM, SHELL and HOME, but that's just a small proportion of the long list that will be not defined.
Cron does not set up a current terminal, so /dev/tty doesn't resolve to anything. (Note, programs spawned by Expect will have a current terminal.)
With high probability, any difficulties will come from these, especially the first. To fix, you need to save all your environment variables in an interactive session and use these in your expect script to repopulate the environment. The easiest way is to use this little expect script:
unset -nocomplain ::env(SSH_AUTH_SOCK) ;# This one is session-bound anyway
puts [list array set ::env [array get ::env]]
That will write out a single very long line which you want to put near the top of your script (or at least before the first spawn). Then see if that works.
Jobs run by cron are not considered login shells, and thus don't source your .bashrc, .bash_profile, etc.
If you want that behavior, you need to add it explicitly to the crontab entry like so:
$ crontab -l
0 13 * * * bash -c '. .bash_profile; etc ...'
$
I'm trying to load a sql from a file in bash and execute the loaded sql. The sql file needs to be versatile, meaning it cannot be altered in order to make things easy while being run in bash (escaping special characters like * )
So I have run into some problems:
If I read my sample.sql
SELECT * FROM SAMPLETABLE
to a variable with
ab=`cat sample.sql`
and execute it
db2 `echo $ab`
I receive an sql error because by doing a cat the * has been replaced by all the files in the directory of sample.sql.
Easy solution would be to replace "" with "\" . But I cannot do this, because the file needs to stay executable in programs like DB Visualizer etc.
Could someone give me hint in the right direction?
The DB2 command line processor has options that accept a filename as input, so you shouldn't need to load statements from a text file into a shell variable.
This command will execute all SQL statements in the file, with newline treated as the statement terminator:
db2 -f sample.sql
This command will execute all SQL statements in the file, with semicolon treated as the statement terminator:
db2 -t -f sample.sql
Other useful CLP flags are:
-x : Suppress the column headings
-v : Echo the statement text immediately before execution
-z : Tee a copy of all CLP output to the filename immediately following this flag
Redirect stdin from the file.
db2 < sample.sql
In case, you have a variable used in your script and wanted to get it replaced by the shell before executed in DB2 then use this approach:
Contents of File.sql:
cat <<xEOF
insert values(1,2) into ${MY_SCHEMA}.${MY_TABLE};
select * from ${MY_SCHEMA}.${MY_TABLE};
xEOF
In command prompt do:
export MY_SCHEMA='STAR'
export MY_TAVLE='DIMENSION'
Then you are all good to get it executed in DB2:
eval File.sq |db2 +p -t
The shell will replace the global variables and then DB2 will execute it.
Hope it helps.