org.openrdf.sail.rdbms.optimizers
Class SqlConstantOptimizer

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

All Implemented Interfaces:

QueryOptimizer, QueryModelVisitor<RuntimeException>

public class SqlConstantOptimizer
extends RdbmsQueryModelVisitorBase<RuntimeException>
implements QueryOptimizer

Optimises SQL constants, include operations with static values and null operations.

Author:

James Leigh

Constructor Summary

SqlConstantOptimizer()

Method Summary

void	meet(SelectQuery node)
void	meet(SqlAnd node)
void	meet(SqlCase node)
void	meet(SqlCompare node)
void	meet(SqlConcat node)
void	meet(SqlEq node)
void	meet(SqlIsNull node)
void	meet(SqlLowerCase node)
void	meet(SqlNot node)
void	meet(SqlOr node)
void	optimize(SqlExpr sqlExpr)
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, meet, meet, meetBinarySqlOperator, meetFromItem, 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

SqlConstantOptimizer

public SqlConstantOptimizer()

Method Detail

meet

public void meet(SelectQuery node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(SqlAnd node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(SqlCase node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(SqlCompare node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(SqlConcat node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(SqlEq node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(SqlIsNull node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(SqlLowerCase node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(SqlNot node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

meet

public void meet(SqlOr node)
          throws RuntimeException

Overrides:

meet in class RdbmsQueryModelVisitorBase<RuntimeException>

Throws:

RuntimeException

optimize

public void optimize(SqlExpr sqlExpr)

optimize

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

Specified by:

optimize in interface QueryOptimizer