SQL/Plus in a coprocess example. Also saves query results into shell variables Post: 302544286

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Top Forums Shell Programming and Scripting SQL/Plus in a coprocess example. Also saves query results into shell variables Post 302544286 by gary_w on Wednesday 3rd of August 2011 11:05:09 AM

08-03-2011

Registered User

Glad you found this useful. Yes this simple example of selecting counts and setting variables does not allow for proper error handling.

You would have to add code in the test to handle output from SQL/Plus that you do not expect before doing the eval.. Given the output from calling a procedure that does not exist:

Code:

SQL> exec efs
BEGIN efs; END;

      *
ERROR at line 1:
ORA-06550: line 1, column 7:
PLS-00201: identifier 'EFS' must be declared
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored

SQL>

you could test for the first word of the output being = "BEGIN" and if so, write the remaining lines until "DONE" to an error file and exit. Or test if the output does not start with what you are expecting and log the remaining lines and exit. At any rate put the common error handling code in a function so it can be reused.

I have updated the code and added an example of catching an error. Note the addition of set -f output which tells the shell not to do filename expansion on it (that is why you got the list of filenames).

Gary

Last edited by gary_w; 08-03-2011 at 12:19 PM..

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drop_database

DROP 
DATABASE(7)						   SQL Commands 						  DROP DATABASE(7)

NAME

       DROP DATABASE - remove a database

SYNOPSIS

       DROP DATABASE [ IF EXISTS ] name

DESCRIPTION

       DROP  DATABASE drops a database. It removes the catalog entries for the database and deletes the directory containing the data. It can only
       be executed by the database owner.  Also, it cannot be executed while you or anyone else are connected to the target database. (Connect	to
       postgres or any other database to issue this command.)

       DROP DATABASE cannot be undone. Use it with care!

PARAMETERS

       IF EXISTS
	      Do not throw an error if the database does not exist. A notice is issued in this case.

       name   The name of the database to remove.

NOTES

       DROP DATABASE cannot be executed inside a transaction block.

       This  command  cannot  be  executed  while  connected  to  the target database. Thus, it might be more convenient to use the program dropdb
       [dropdb(1)] instead, which is a wrapper around this command.

COMPATIBILITY

       There is no DROP DATABASE statement in the SQL standard.

SEE ALSO

       CREATE DATABASE [create_database(7)]

SQL - Language Statements					    2010-05-14							  DROP DATABASE(7)