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By default, a new Concordance database doesn t have any security applied If a database contains data that isn t of a sensitive nature, it might not be necessary to enable security at all However, in many applications it s necessary to restrict the information that users can view, and more importantly, to prevent unauthorized users from accessing data However, until you explicitly enable security in a Concordance database, any user that has access to the program and possesses the appropriate network permissions can open a Concordance database and view Concordance When enabled, Concordance adds a layer of security over regular network permissions and enforces that security from within Concordance itself.

NUMBER(7,-3) NUMBER NUMBER(*,5)

Oracle offers a number of alphanumeric datatypes. Depending on the Oracle version you are using, there are some differences due to the evolution of the ANSI/ISO SQL standard over the years. For example, since Oracle7, the two datatypes VARCHAR and VARCHAR2 are identical, but this could change in a

This means that users who have full network rights to read, write, execute, and delete files in the Concordance directory can still do so, but when they open a Concordance database that s secure, they re restricted by Concordance itself from modifying or viewing data from within the program For example, while users in Concordance might be prevented from deleting an entire database from the File Zap menu, they can still delete all Concordance files from the database s directory if their network permissions allow them to do so A thorough treatment of security in Concordance involves both Concordance s own security model and users network permissions as well Concordance s security model is applied to each database instance To administer security for a specific database, you must open that database first.

The root/ directory is where we will put the templates. The root/static/ directory will include static files, such as style sheets, images, and JavaScript files. Where access control is not required, this directory might also be a suitable location for files uploaded by the user. Catalyst::Helper provides a number of images by default.

future Oracle release. If you create a table and you use the VARCHAR datatype, the Oracle DBMS translates VARCHAR to VARCHAR2 on the fly. Therefore, this book refers to only the VARCHAR2 datatype. In cases where the maximum size of the VARCHAR2 datatype (4000) is insufficient for a specific column, you can use the CLOB (Character Large OBject) datatype. Table 3-2 shows some simple examples of character datatypes. Table 3-2. Character Datatype Examples

There s no external tool for administering security, nor is there a method to apply security across several sessions of multiple databases Security in Concordance affects a user s ability to read (and search) data from specific fields, or to access menu items Restrictions are placed on fields within records, not on the records themselves If a database contains records that a user shouldn t view, you must remove those records from the database entirely or prevent the user from accessing the database When security is applied in Concordance, passwords and other security settings are stored in the database s SEC file If a database is named DOCREVIEWDCB, its security file will be named DOCREVIEWSEC This file won t exist until security has been enabled Once security is activated, deleting this file will lock all users out of the database, thereby rendering it unusable..

Alphanumeric, variable length, up to 25 characters Alphanumeric, fixed length, four characters Alphanumeric, larger than the maximum size of the VARCHAR2 datatype

The script/ directory contains scripts to run helpers to create models, views, and controllers (lolcatalyst_lite_create.pl); the script to run as a CGI script (lolcatalyst_lite_cgi.pl); the FastCGI script (lolcatalyst_lite_fastcgi.pl); a script to test individual URLs (lolcatalyst_ lite_test.pl); and last and most important, the development server script (lolcatalyst_ lite_server.pl). If we run the script/lolcatalyst_lite_server.pl script now, we get a lot of useful debug information in the terminal it was run from, and we can visit http://localhost:3000 to get a nice welcome screen.

Note The actual units of measure used for the size of CHAR and VARCHAR2 datatypes depend on character semantics (bytes or characters). See 7 for details.

You manage security from the File Administration Security menu, which opens the Security dialog. Because security isn t applied by default on a new Concordance database, any user will be able to access this tool. A login screen is displayed with the user name OWNER. The password is initially blank (see Figure 7-6).