java.lang.Object
org.apache.derby.vti.Restriction
- All Implemented Interfaces:
- Serializable
- Direct Known Subclasses:
- Restriction.AND,- Restriction.ColumnQualifier,- Restriction.OR
An expression to be pushed into a Table Function so that the Table Function can short-circuit its processing and return fewer rows. A restriction is represented as a binary tree. The non-leaf nodes are ANDs and ORs. The leaf nodes are ColumnQualifiers. A ColumnQualifier is a simple expression comparing a constant value to a column in the Table Function.
- See Also:
- 
Nested Class SummaryNested ClassesModifier and TypeClassDescriptionstatic classAn AND of two Restrictionsstatic classA simple comparison of a column to a constant value.static classAn OR of two Restrictions
- 
Constructor SummaryConstructors
- 
Method Summary
- 
Constructor Details- 
Restrictionpublic Restriction()
 
- 
- 
Method Details- 
toSQLTurn this Restriction into a string suitable for use in a WHERE clause.- Returns:
- this Restriction as a string suitable for use in a WHERE clause.
 
 
-