org.openrdf.sail.rdbms.optimizers
Class VarColumnLookupOptimizer

java.lang.Object
  org.openrdf.query.algebra.helpers.QueryModelVisitorBase<X>
      org.openrdf.sail.rdbms.algebra.base.RdbmsQueryModelVisitorBase<RuntimeException>
          org.openrdf.sail.rdbms.optimizers.VarColumnLookupOptimizer

All Implemented Interfaces:

QueryOptimizer, QueryModelVisitor<RuntimeException>

public class VarColumnLookupOptimizer
extends RdbmsQueryModelVisitorBase<RuntimeException>
implements QueryOptimizer

Localises variables to use an available column in the current variable scope.

Author:

James Leigh

Constructor Summary

VarColumnLookupOptimizer()

Method Summary

void	meet(BNodeColumn node)
void	meet(DatatypeColumn node)
void	meet(DateTimeColumn node)
void	meet(HashColumn node)
void	meet(LabelColumn node)
void	meet(LanguageColumn node)
void	meet(LongLabelColumn node)
void	meet(LongURIColumn node)
void	meet(NumericColumn node)
void	meet(RefIdColumn node)
void	meet(SelectQuery node)
void	meet(URIColumn node)
void	meetFromItem(FromItem node)
void	optimize(TupleExpr tupleExpr, Dataset dataset, BindingSet bindings)

Methods inherited from class org.openrdf.sail.rdbms.algebra.base.RdbmsQueryModelVisitorBase

meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meetBinarySqlOperator, meetSqlConstant, meetSqlExpr, meetUnarySqlOperator, meetValueColumnBase

Methods inherited from class org.openrdf.query.algebra.helpers.QueryModelVisitorBase

meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meetBinaryTupleOperator, meetBinaryValueOperator, meetCompareSubQueryValueOperator, meetNode, meetOther, meetSubQueryValueOperator, meetUnaryTupleOperator, meetUnaryValueOperator

Methods inherited from class java.lang.Object

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

Constructor Detail

VarColumnLookupOptimizer

public VarColumnLookupOptimizer()

Method Detail

optimize

public void optimize(TupleExpr tupleExpr,
                     Dataset dataset,
                     BindingSet bindings)

Specified by:

optimize in interface QueryOptimizer

meetFromItem

public void meetFromItem(FromItem node)
                  throws RuntimeException

Overrides:

meetFromItem in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(SelectQuery node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(BNodeColumn node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(DatatypeColumn node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(DateTimeColumn node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(LabelColumn node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(LongLabelColumn node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(LanguageColumn node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(NumericColumn node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(LongURIColumn node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(URIColumn node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(RefIdColumn node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(HashColumn node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException