/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.tajo.engine.planner.logical;
import com.google.common.base.Objects;
import com.google.gson.annotations.Expose;
import org.apache.tajo.catalog.Schema;
import org.apache.tajo.engine.planner.PlanString;
import org.apache.tajo.engine.planner.PlannerUtil;
import org.apache.tajo.engine.planner.Target;
public class TableSubQueryNode extends RelationNode implements Projectable {
@Expose private String tableName;
@Expose private LogicalNode subQuery;
@Expose private Target [] targets; // unused
public TableSubQueryNode(int pid, String tableName, LogicalNode subQuery) {
super(pid, NodeType.TABLE_SUBQUERY);
this.tableName = PlannerUtil.normalizeTableName(tableName);
this.subQuery = subQuery;
setOutSchema((Schema) this.subQuery.getOutSchema().clone());
getOutSchema().setQualifier(this.tableName, true);
setInSchema((Schema) this.subQuery.getInSchema().clone());
}
public String getTableName() {
return tableName;
}
@Override
public String getCanonicalName() {
return tableName;
}
@Override
public Schema getTableSchema() {
return getOutSchema();
}
public void setSubQuery(LogicalNode node) {
this.subQuery = node;
setInSchema(subQuery.getInSchema());
}
public LogicalNode getSubQuery() {
return subQuery;
}
@Override
public boolean hasTargets() {
return targets != null;
}
@Override
public void setTargets(Target[] targets) {
this.targets = targets;
}
@Override
public Target[] getTargets() {
return targets;
}
@Override
public PlanString getPlanString() {
PlanString planStr = new PlanString("TablePrimarySubQuery");
planStr.appendTitle(" as ").appendTitle(tableName);
return planStr;
}
@Override
public int hashCode() {
return Objects.hashCode(tableName, subQuery);
}
@Override
public boolean equals(Object object) {
if (object instanceof TableSubQueryNode) {
TableSubQueryNode another = (TableSubQueryNode) object;
return tableName.equals(another.tableName) && subQuery.equals(another.subQuery);
}
return false;
}
@Override
public Object clone() throws CloneNotSupportedException {
TableSubQueryNode newTableSubQueryNode = (TableSubQueryNode) super.clone();
newTableSubQueryNode.tableName = tableName;
return newTableSubQueryNode;
}
@Override
public void preOrder(LogicalNodeVisitor visitor) {
visitor.visit(this);
subQuery.preOrder(visitor);
}
@Override
public void postOrder(LogicalNodeVisitor visitor) {
subQuery.preOrder(visitor);
visitor.visit(this);
}
public String toString() {
return "Table Subquery (alias = " + tableName + ")\n" + subQuery.toString();
}
}