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SQL*Plus scripts may contain a mixture of SQL commands and SQL*Plus commands. This combination makes SQL*Plus a nice report-generating tool, as you will see in the next section of this chapter. One small problem is that SQL*Plus commands (entered interactively) don t go into the SQL buffer. Normally this is helpful, because it allows you to repeat your most recent SQL command from the SQL buffer, while executing SQL*Plus commands in between. However, this implies that you cannot add any SQL*Plus commands to your scripts with the SAVE ... APPEND command. To get SQL*Plus commands into your scripts, you can use one of the following: An external editor A separate SQL*Plus buffer

Summary

Using an external editor is the most straightforward approach, in most cases. For example, you can use Notepad in a Microsoft Windows environment to maintain your SQL*Plus scripts. The charm of using a separate SQL*Plus buffer is that it is completely platform- and operating system-independent, and it is fully driven from the interactive SQL*Plus prompt. That s why we discuss using a separate buffer here. Listing 11-25 shows an example of using a separate SQL*Plus buffer to generate scripts. To try this out, execute the CLEAR BUFFER and SET BUFFER BLAHBLAH commands, followed by the INPUT command, and enter the following 14 lines verbatim. Exit SQL*Plus input mode by entering another newline, so that you return to the SQL*Plus prompt. Listing 11-25. Using a Separate SQL*Plus Buffer to Generate Scripts SQL> SQL> SQL> 1 2 3 4 5 6 7 8 9 10 11 12 clear buffer set buffer blahblah input clear screen set verify off set pause off accept dept number prompt "Enter a department number: " select * from departments where deptno = &dept; select ename, job, msal from employees where deptno = &dept; undefine dept

This chapter has covered the methods you use to interact with a database s imagebase. Often, you ll export data from an imagebase to an external, delimited log file. Unlike delimited files used with Concordance, the structure of an Opticon log file is fixed, with the same number of elements appearing in the same sequence in every log file. You can use log files sometimes referred to as cross-reference files to load image data into an imagebase. You accomplish the bulk of administrative tasks in Opticon from the Imagebase Management dialog. This dialog has several tabs, each pertaining to a specific administrative function. This chapter has discussed the features accessible from each of these tabs in detail. However, a common administrative task not referenced in this chapter remains: exporting image data during document productions. This particular method of exporting data from Opticon is so important that the next chapter is wholly devoted to this procedure.

13 set pause on 14 set verify on 15 SQL> Now you can save the script and test it, as follows: SQL> save testscript2 Created file testscript2.sql SQL> @testscript2 Enter a department number: 20 ... The SET BUFFER command (choose any buffer name you like) creates a nondefault SQL*Plus buffer.

In this chapter, we covered writing your own view and your own base controllers. We then described how to implement your own subroutine attributes using a variety of techniques. For maximum code reusability, we recommend that you use Catalyst::Controller::ActionRole for this. Finally, we looked at the appropriate use of Catalyst plug-ins and detailed what you should use them for and how they should be used. In the next chapter, we present the Catalyst Cookbook, a range of programming techniques and other tricks that you may find useful, but that we couldn t fit into other bits of the book. Broadly speaking, the recipes are split into models, views, controllers, development process, and other miscellaneous topics.