de.fuberlin.wiwiss.d2rq.algebra
Class ExpressionProjectionSpec
java.lang.Object
de.fuberlin.wiwiss.d2rq.algebra.ExpressionProjectionSpec
- All Implemented Interfaces:
- ProjectionSpec, Comparable<ProjectionSpec>
public class ExpressionProjectionSpec
- extends Object
- implements ProjectionSpec
ExpressionProjectionSpec
public ExpressionProjectionSpec(Expression expression)
renameAttributes
public ProjectionSpec renameAttributes(ColumnRenamer renamer)
- Specified by:
renameAttributes
in interface ProjectionSpec
requiredAttributes
public Set<Attribute> requiredAttributes()
- Specified by:
requiredAttributes
in interface ProjectionSpec
toExpression
public Expression toExpression()
- Specified by:
toExpression
in interface ProjectionSpec
toSQL
public String toSQL(ConnectedDB database,
AliasMap aliases)
- Specified by:
toSQL
in interface ProjectionSpec
notNullExpression
public Expression notNullExpression(ConnectedDB database,
AliasMap aliases)
- Specified by:
notNullExpression
in interface ProjectionSpec
equals
public boolean equals(Object other)
- Overrides:
equals
in class Object
hashCode
public int hashCode()
- Overrides:
hashCode
in class Object
toString
public String toString()
- Overrides:
toString
in class Object
compareTo
public int compareTo(ProjectionSpec other)
- Compares columns alphanumerically by qualified name, case sensitive.
Attributes with schema are larger than attributes without schema.
- Specified by:
compareTo
in interface Comparable<ProjectionSpec>