org.aksw.sparqlify.algebra.sql.exprs.evaluators

Class SqlExprEvaluator_Equals

java.lang.Object

org.aksw.sparqlify.algebra.sql.exprs.evaluators.SqlExprEvaluator2

org.aksw.sparqlify.algebra.sql.exprs.evaluators.SqlExprEvaluator_Equals

All Implemented Interfaces:

SqlExprEvaluator

public class SqlExprEvaluator_Equals
extends SqlExprEvaluator2

Author:

Claus Stadler

Constructor Summary

Constructors

Constructor and Description
SqlExprEvaluator_Equals(TypeSystem datatypeSystem)

Method Summary

Methods

Modifier and Type	Method and Description
static S_ColumnRef	asColumn(SqlExpr expr)
static S_Constant	asConstant(SqlExpr expr)
SqlExpr	eval(SqlExpr a, SqlExpr b)
static TypeToken	getCommonDataype(SqlExpr left, SqlExpr right, TypeSystem system)
static org.aksw.commons.util.Pair<? extends SqlExpr,? extends SqlExpr>	resolveCast(SqlExpr left, SqlExpr right, TypeSystem system)
static org.aksw.commons.util.Pair<S_ColumnRef,S_Constant>	tryMatch(SqlExpr left, SqlExpr right)
static org.aksw.commons.util.Pair<S_ColumnRef,S_Constant>	tryMatchDirected(SqlExpr left, SqlExpr right)

Methods inherited from class org.aksw.sparqlify.algebra.sql.exprs.evaluators.SqlExprEvaluator2

eval

Methods inherited from class java.lang.Object

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

Constructor Detail

SqlExprEvaluator_Equals

public SqlExprEvaluator_Equals(TypeSystem datatypeSystem)

Method Detail

eval

public SqlExpr eval(SqlExpr a,
           SqlExpr b)

Specified by:

eval in class SqlExprEvaluator2

getCommonDataype

public static TypeToken getCommonDataype(SqlExpr left,
                         SqlExpr right,
                         TypeSystem system)

asConstant

public static S_Constant asConstant(SqlExpr expr)

asColumn

public static S_ColumnRef asColumn(SqlExpr expr)

resolveCast

public static org.aksw.commons.util.Pair<? extends SqlExpr,? extends SqlExpr> resolveCast(SqlExpr left,
                                                                          SqlExpr right,
                                                                          TypeSystem system)

tryMatch

public static org.aksw.commons.util.Pair<S_ColumnRef,S_Constant> tryMatch(SqlExpr left,
                                                          SqlExpr right)

tryMatchDirected

public static org.aksw.commons.util.Pair<S_ColumnRef,S_Constant> tryMatchDirected(SqlExpr left,
                                                                  SqlExpr right)