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4.2 Schema Browser

This tool provides you a simple browser for exploring database schema objects. Initially it can be said that the browser also provides a browser like functionality for the template help (see Template Help) which is covered separately. This browser will provide you with more information and you will also in future versions of TOra be able to interact with schema objects (Dropping or create tables etc.), this is not fully possible in the current version. The template help on the other hand is tree based and some people consider it easier and faster to work with.

images/browser

Using the browser

The schema browser has a very simple interface with a toolbar which contains the following functions. All of these are also available in the Browser menu item except for the schema selection and change object.

Refresh

Refresh the displayed data from the database. Also available on the F5 key.

Define filter

Displays the define filter dialog( ). This is used to specify which objects to show in the browser. The default filter is to show everything. Also available on the CTRL+SHIFT+G key.

Clear filter

Remove the current filter and revert to the default of showing everything. Also available on the CTRL+SHIFT+H key.

Schema

The last item on the toolbar is a combo box where you can select the schema to display objects for. It defaults the schema you are currently logged in as. Only schemas that are visible to the current user are selectable in the lost (Really, TOra does not contain the secret DBA password that will always let you access everything regardless of your privileges).

Change connection

Change the connection this tool window should operate on.

The rest of the interface consists of two tabbed windows, one within the other. The first one you can use to select the object type you want to inspect. When you have selected a type you can see the visible objects of the specified type available in the selected schema. The second tab indicates what kind of information you want to explore about the selected object and depends on the object type ( .). When you select an object name in the left list you can inspect information about it to the right.

You can move the keyboard focus to the schema selection using ALT+S and to the current object list using ALT+N.

Available information

This is the available information for the different object types.

Object typeNameDescription
Tables
ColumnsA description of the columns in the table. For more information about this information also see object description.
IndexesA list with the indexes that have been created for this table.
ConstraintsDisplays constraints associated with this table.
ReferencesDisplays the foreign key constraints that references this table and the other objects that have dependencies on this table.
GrantsThe grants that have been made on this table.
TriggersLists the triggers that exist for this table.
DataDisplays the data in the table. This is the only part of the database browser that let you modify any data. For more information about how to use the content editor .
InformationContains information about the table available in the SGA including analysed statistics etc.
PartitionsTODO.
ExtentsTODO.
ScriptThis tab displays an SQL script to recreate the database object.
Views
ColumnsA description of the columns in the view. For more information about this information also see object description.
SQLThe SQL that defines the view.
DataDisplays the data in the view. This is the only part of the database browser that let you modify any data. For more information about how to use the content editor ( ). You can not modify some views depending on how they are defined. See the Oracle reference for more information about editing views.
GrantsThe grants that have been made on this view.
DependenciesThe objects that depend on this view.
ScriptThis tab displays an SQL script to recreate the database object.
Indexes
ColumnsThe columns that the index operate on.
InformationInformation in the SGA about an index. For instance analyzed statistics available for this index.
ExtentsTODO.
ScriptThis tab displays an SQL script to recreate the database object.
Sequences
InfoInformation about the sequence.
GrantsThe grants that have been made on this object.
ScriptThis tab displays an SQL script to recreate the database object.
Synonyms
InfoInformation about the synonyms
GrantsThe grants that have been made on this object.
ScriptThis tab displays an SQL script to recreate the database object.
Code
DeclarationThe declaration of a package or type.
BodyThe implementation of a package, body, procedure or function.
GrantsThe grants that have been made on this object.
DependenciesDependencies this object has.
ScriptThis tab displays an SQL script to recreate the database object.
Triggers
InfoInformation about the trigger.
CodeThe code that implement the trigger.
ColumnsThe columns this trigger operates on.
GrantsThe grants that have been made on this object.
DependenciesDependencies of this object.
ScriptThis tab displays an SQL script to recreate the database object.
DBLinks
InfoInformation about the trigger.
SynonymsTODO.

Content editor

The content editor lets you edit the contents of a table or view. There are a few things to note about this.

First of all the content editor is designed to behave nicely to the database which means that it will only save the data when it thinks you are finished editing a row. This happens when you save the current row change or you commit the database. When there is unsaved data you can see it in the status bar that there exists unsaved data. Also observe that the content editor will respect the auto commit setting in the database settings.

The content editor has it’s own toolbar with the following buttons.

Define filter

Displays the define filter dialog. This is used to specify which objects to show in the browser. The default filter is to show everything.

Clear filter

Remove the current filter and revert to the default of showing everything.

Save changes

Save the changes made to the current row to the database. Observe that this will not commit the changes.

Add new record

Add a new record to the current table.

Duplicate an existing record

Create a new record copying all data from currently selected one.

Delete current record from table

Delete the current record from the database.

Refresh data

Requery data from the database.

Go to first row

Go to the first record in the editor.

Go to previous row

Go to the previous record in the editor.

Go to next row

Go to the next record in the editor.

Go to last row

Go to the last record in the editor. Observe that this will read in all available records in the table into memory.

Toggle between table or single record editing

Swith between editing data as a table or single record (the later one could be useful for table with a lot of columns).

The content editor can define a filter to specify which part of a table to edit. This dialog looks like this.

images/contentfilter

In the selection criteria part you can add whatever you want to go after a where in a select statement. In the sort order you can list the columns you want to sort on. The sort order only affect the order the records are read from the database, after they are read you can still sort on any column by clicking it. To the right is a list of available columns in the table.

Finally at the bottom is a checkbox called use for all tables. If this box is checked the index is used for all tables, if not checked you can define specific filters for each tables and the content editor will remember the different filters as you jump between tables. The reason for this is that it’s quite common that not all tables have all the columns you want to filter on for a table, in this case you will get an error trying to access the table with a faulty filter setting.

Defining a filter

Filtering is based on the object name and can be specified in a variety of ways. This is the dialog used to specify the filter.

images/browserfilter

The most important part of this dialog is the editor which lets you specify the string to apply the criteria to. This is not available for No filter setting. The different available types and options are.

No filter

No filter specified, display all objects.

Start with

Only include objects which name starts with the specified string.

End with

Only include objects which name ends with the specified string.

Contains

Only include objects which name contain the specified string.

Comma list

TODO.

RegExp

Only include objects which name matches the regular expression specified in the editor. The dialect of RegExp:s is the ones in the version of Qt that TOra is compiled against. For more information on regular expressions check out http://doc.trolltech.com/qregexp.html, if you are using Qt 3.0 or later you have a more advanced form of regular expressions.

Ignore case

Ignore the case when matches. Since object names are pretty much always uppercase it is probably safest to leave this on.

Invert selection

If set, include all the objects that does not meet the specified criteria instead of the ones which does.

Some objects you can also search on what tablespace they are located on. This can be specified by the lower part of the dialog.

Include all

Include all regardless of tablespace

Include

Include the objects located on the selected tablespaces in the list below.

Exclude

Include the objects not located on the selected tablespaces in the list below.


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