org.apache.hadoop.hive.ql.optimizer.lineage.ExprProcCtx Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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,
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* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hive.ql.optimizer.lineage;
import org.apache.hadoop.hive.ql.exec.Operator;
import org.apache.hadoop.hive.ql.exec.RowSchema;
import org.apache.hadoop.hive.ql.lib.NodeProcessorCtx;
import org.apache.hadoop.hive.ql.plan.OperatorDesc;
/**
* The processor context for the lineage information. This contains the
* lineage context and the column info and operator information that is
* being used for the current expression.
*/
public class ExprProcCtx implements NodeProcessorCtx {
/**
* The lineage context that is being populated.
*/
private final LineageCtx lctx;
/**
* The input operator in case the current operator is not a leaf.
*/
private final Operator inpOp;
/**
* Constructor.
*
* @param lctx The lineage context thatcontains the dependencies for the inputs.
* @param inpOp The input operator to the current operator.
*/
public ExprProcCtx(LineageCtx lctx,
Operator inpOp) {
this.lctx = lctx;
this.inpOp = inpOp;
}
/**
* Gets the lineage context.
*
* @return LineageCtx The lineage context.
*/
public LineageCtx getLineageCtx() {
return lctx;
}
/**
* Gets the input operator.
*
* @return Operator The input operator - this is null in case the current
* operator is a leaf.
*/
public Operator getInputOperator() {
return inpOp;
}
public RowSchema getSchema() {
return inpOp.getSchema();
}
}