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Full Discussion: piping oracle output to a file?
Top Forums Shell Programming and Scripting piping oracle output to a file? Post 302116487 by tmarikle on Friday 4th of May 2007 10:57:04 AM
Old 05-04-2007
Quote:
Originally Posted by samuelc
Hi all,
I am new to shell scripting and want to know how this code works.

{
echo "set pagesize 0"
echo "SELECT empno||','||ename||','||job||','||mgr||hiredate||','||sal||','||comm||','||deptno "\
"FROM emp;"
} | sqlplus -s $username/$password@$database >> $root_dir/$csv_file1

Thanks in advance.
Code:
{
  echo "...
} | sqlplus

basically collects all of the "echo" command's output as a group and they are piped through to Oracle's sqlplus command processor. So it behaves just like running sqlplus interactively and you typing in those commands.

Code:
>> $root_dir/$csv_file1

directs the output from the SQL commands to a file on the UNIX server. The path and filename are in variables $root_dir and $csv_file.

Ultimately, the SQL is building a csv (comma delimited) file that will be used for, presumably, as an input to another system.

Thomas
 

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LEARN ABOUT REDHAT

droplang

DROPLANG(1)						  PostgreSQL Client Applications					       DROPLANG(1)

NAME

       droplang - remove a PostgreSQL procedural language

SYNOPSIS

       droplang [ connection-options... ] langname [ dbname ]

       droplang [ connection-options... ]  --list | -l dbname

DESCRIPTION

       droplang is a utility for removing an existing programming language from a PostgreSQL database.	droplang can drop any procedural language,
       even those not supplied by the PostgreSQL distribution.

       Although backend programming languages can be removed directly using several SQL commands, it is recommended to	use  droplang  because	it
       performs a number of checks and is much easier to use. See DROP LANGUAGE [drop_language(7)] for more.

OPTIONS

       droplang accepts the following command line arguments:

       langname
	      Specifies the name of the backend programming language to be removed.

       [-d] dbname

       [--dbname] dbname
	      Specifies  from which database the language should be removed.  The default is to use the database with the same name as the current
	      system user.

       -e

       --echo Displays SQL commands as they are executed.

       -l

       --list Shows a list of already installed languages in the target database (which must be specified).

       droplang also accepts the following command line arguments for connection parameters:

       -h host

       --host host
	      Specifies the host name of the machine on which the server is running. If host begins with a slash, it is used as the directory  for
	      the Unix domain socket.

       -p port

       --port port
	      Specifies the Internet TCP/IP port or local Unix domain socket file extension on which the server is listening for connections.

       -U username

       --username username
	      User name to connect as

       -W

       --password
	      Force password prompt.

ENVIRONMENT

       PGDATABASE

       PGHOST

       PGPORT

       PGUSER Default connection parameters.

DIAGNOSTICS

       Most error messages are self-explanatory. If not, run droplang with the --echo option and see under the respective SQL command for details.
       Check also under psql(1) for more possibilities.

NOTES

       Use createlang(1) to add a language.

EXAMPLES

       To remove pltcl:

       $ droplang pltcl dbname

SEE ALSO

       createlang(1), DROP LANGUAGE [drop_language(7)]

Application							    2002-11-22							       DROPLANG(1)
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