com.facebook.presto.jdbc.internal.spi.relation.InSubqueryExpression Maven / Gradle / Ivy
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/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.facebook.presto.jdbc.internal.spi.relation;
import com.facebook.presto.jdbc.internal.common.type.Type;
import com.facebook.presto.jdbc.internal.spi.SourceLocation;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
import static com.facebook.presto.jdbc.internal.common.type.BooleanType.BOOLEAN;
import static java.lang.String.format;
import static java.util.Arrays.asList;
import static java.util.Collections.unmodifiableList;
import static java.util.Objects.requireNonNull;
/**
* RowExpression equivalent of InPredicate with subqueries.
*/
public class InSubqueryExpression
extends IntermediateFormExpression
{
private final VariableReferenceExpression value;
private final VariableReferenceExpression subquery;
public InSubqueryExpression(Optional sourceLocation, VariableReferenceExpression value, VariableReferenceExpression subquery)
{
super(sourceLocation);
this.value = requireNonNull(value, "value is null");
this.subquery = requireNonNull(subquery, "subquery is null");
}
public VariableReferenceExpression getValue()
{
return value;
}
public VariableReferenceExpression getSubquery()
{
return subquery;
}
@Override
public Type getType()
{
return BOOLEAN;
}
@Override
public List getChildren()
{
return unmodifiableList(asList(value, subquery));
}
@Override
public boolean equals(Object obj)
{
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
InSubqueryExpression other = (InSubqueryExpression) obj;
return Objects.equals(this.value, other.value) &&
Objects.equals(this.subquery, other.subquery);
}
@Override
public int hashCode()
{
return Objects.hash(value, subquery);
}
@Override
public String toString()
{
return format("%s IN %s", value, subquery);
}
@Override
public R accept(RowExpressionVisitor visitor, C context)
{
return visitor.visitInSubqueryExpression(this, context);
}
@Override
public RowExpression canonicalize()
{
return getSourceLocation().isPresent() ? new InSubqueryExpression(Optional.empty(), value, subquery) : this;
}
}
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