org.aksw.sparqlify.algebra.sql.nodes

Class SqlProjection

java.lang.Object

org.aksw.sparqlify.algebra.sql.nodes.SqlNodeBase

org.aksw.sparqlify.algebra.sql.nodes.SqlNodeBase1

org.aksw.sparqlify.algebra.sql.nodes.SqlProjection

All Implemented Interfaces:

SqlNodeOld

public class SqlProjection
extends SqlNodeBase1

Projects the columns of the inner statement to new colums. Can be used for renaming variables and performing calculations on them. FIXME Note sure if expression should be of type Expr or SqlExpr. Currently I use Expr for everything in order not having to implement transformations twice. TODO I think this class should be superseded by SqlSelectBlock(?)

Field Summary

Fields inherited from class org.aksw.sparqlify.algebra.sql.nodes.SqlNodeBase1

subNode

Fields inherited from class org.aksw.sparqlify.algebra.sql.nodes.SqlNodeBase

aliasName

Constructor Summary

Constructors

Constructor and Description
SqlProjection(String aliasName, SqlNodeOld sqlNode)
SqlProjection(String aliasName, SqlNodeOld sqlNode, List<com.hp.hpl.jena.sparql.core.Var> order, Map<com.hp.hpl.jena.sparql.core.Var,com.hp.hpl.jena.sparql.expr.Expr> aliasToExpr)

Method Summary

Methods

Modifier and Type	Method and Description
Map<com.hp.hpl.jena.sparql.core.Var,com.hp.hpl.jena.sparql.expr.Expr>	getProjection()

Methods inherited from class org.aksw.sparqlify.algebra.sql.nodes.SqlNodeBase1

copy, getArgs, getSubNode

Methods inherited from class org.aksw.sparqlify.algebra.sql.nodes.SqlNodeBase

getAliasName, getAliasToColumn, getConstraints, getSparqlVarsMentioned, getSparqlVarToExprs, toString, write

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

SqlProjection

public SqlProjection(String aliasName,
             SqlNodeOld sqlNode)

SqlProjection

public SqlProjection(String aliasName,
             SqlNodeOld sqlNode,
             List<com.hp.hpl.jena.sparql.core.Var> order,
             Map<com.hp.hpl.jena.sparql.core.Var,com.hp.hpl.jena.sparql.expr.Expr> aliasToExpr)

Method Detail

getProjection

public Map<com.hp.hpl.jena.sparql.core.Var,com.hp.hpl.jena.sparql.expr.Expr> getProjection()