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Unless you have specific system privileges, you cannot drop tables owned by other database users. Also, you cannot roll back a DROP TABLE command. As you ve learned in previous chapters, this is true for all DDL statements (CREATE, ALTER, and DROP). Errare humanum est, as the Romans said. Because human errors occur occasionally, Oracle Database 10g introduced the concept of the database recycle bin. By default, all dropped tables (and their dependent objects) initially end up in the recycle bin. You can query the recycle bin using the [USER_]RECYCLEBIN view, as shown in Listing 7-18. To make sure we start with an empty recycle bin, we begin the experiment with a PURGE command. Listing 7-18. Dropping Tables and Querying the Recycle Bin SQL> purge recyclebin; Recyclebin purged. SQL> drop table history; Table dropped. SQL> select object_name, original_name, droptime 2 from recyclebin; OBJECT_NAME -----------------------------BIN$mlRH1je9TBOeVEUhukIpCw==$0 BIN$EETkZCY0RSKCR3BhtF9cJw==$0 SQL> As you can see, the objects are renamed, but the original names are kept as well. There is one entry for the HISTORY table and one entry for the primary key index. You can recover tables (and optionally rename them) from the recycle bin by using the FLASHBACK TABLEcommand: SQL> flashback table history to before drop 2 [rename to <new name>]; Flashback complete. SQL> ORIGINAL_NAME ---------------------H_PK HISTORY DROPTIME ------------------2004-07-01:20:22:23 2004-07-01:20:22:23

Model/View/Controller 247 Import Existing Schemas to DBIx::Class 248 Use DBIx::Class::Tree and Display with JavaScript and the Template Toolkit 249 Catalyst::Model::Factory and Catalyst::Model:: Factory::PerRequest 254 A Way to Quickly Resolve Browser Compatibility Issues 255 Output CSV from a Controller Action 258 Dynamically Generate Graphics with Catalyst::View::GD 259 Dynamically Generate Barcodes from Catalyst 260 Produce Graphs with Chart::Clicker and Catalyst:: View::Graphics::Primitive 262 Alternative Templating Systems 264 Easy Spam Protection with Catalyst::Controller::reCAPTCHA 267 Catalyst::View::Component::SubInclude 269 Handle Legacy CGI Scripts in Catalyst 270 Intelligent Use of Base Controllers 272 Catalyst::View::Email::Template 275 Miscellaneous Recipes 277 Run Parts of an Application As a Stand-Alone Script 277 MojoMojo: The Catalyst Wiki 278 Persistent Login and API Authentication 281 Multirealm and Progressive Authentication 286 Deploy with a Cache 289.

Caution There is no guarantee the FLASHBACK TABLE command always succeeds. The recycle bin can be purged explicitly (by a database administrator) or implicitly (by the Oracle DBMS).

Figure 10-7. An example of n-up printing, with n=4. Four pages of the report are compressed so that they appear on a single page of the report.

If you want to drop a table and bypass the recycle bin, you can use the PURGE option of the DROP TABLE command, as shown in Figure 7-18. If you drop a table, you implicitly drop certain dependent database objects, such as indexes, triggers, and table privileges granted to other database users. You also invalidate certain other database objects, such as views and packages. Keep this in mind during database reorganizations. To re-create a

A component is a code module that adds some extra functionality to a row object. For example, DBIx::Class::InflateColumn::DateTime implements the inflate functionality to return DateTime objects from accessors for columns that are marked as containing datetime type data. It also implements deflate, which allows you to pass a DateTime object to a column accessor, and it will be output into the database as the appropriately formatted string to represent that datetime.

The Page breaks text fields accept the number of lines for Widows and Orphans These terms refer to lines that appear before and after a page break when a document record spans more than one page Widows are the number of lines left at the bottom of a page when Concordance ends one record, and begins printing the next Orphans refer to the number of lines at the top of the next page These options are relevant if the New page for each record option is not checked When this option is not checked, new document records will be added to an existing page in the report, at the end of the last document record; more than one document record can appear on a single page.