Package com.mckoi.database
Class ViewManager
- java.lang.Object
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- com.mckoi.database.ViewManager
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public class ViewManager extends java.lang.Object
A DatabaseConnection view manager. This controls adding, updating, deleting, and processing views inside the system view table.- Author:
- Tobias Downer
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description QueryPlanNode
createViewQueryPlanNode(TableName view_name)
Returns a freshly deserialized QueryPlanNode object for the given view object.void
defineView(ViewDef view, SQLQuery query, User user)
Defines a view.boolean
deleteView(TableName view_name)
Deletes the view with the given name, or returns false if no entries were deleted from the view table.boolean
viewExists(TableName view_name)
Returns true if the view with the given name exists.
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Method Detail
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viewExists
public boolean viewExists(TableName view_name)
Returns true if the view with the given name exists.
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defineView
public void defineView(ViewDef view, SQLQuery query, User user) throws DatabaseException
Defines a view. If the view with the name has not been defined it is defined. If the view has been defined then it is overwritten with this information.- Parameters:
view
- information that defines the view.query
- the query that forms the view.user
- the user that owns this view being defined.- Throws:
DatabaseException
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deleteView
public boolean deleteView(TableName view_name) throws DatabaseException
Deletes the view with the given name, or returns false if no entries were deleted from the view table.- Throws:
DatabaseException
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createViewQueryPlanNode
public QueryPlanNode createViewQueryPlanNode(TableName view_name)
Returns a freshly deserialized QueryPlanNode object for the given view object.
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