org.apache.hadoop.hive.ql.exec.vector.expressions.CastLongToDate Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
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package org.apache.hadoop.hive.ql.exec.vector.expressions;
import org.apache.hadoop.hive.ql.exec.vector.LongColumnVector;
import org.apache.hadoop.hive.ql.exec.vector.VectorExpressionDescriptor;
import org.apache.hadoop.hive.ql.exec.vector.VectorizedRowBatch;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector.PrimitiveCategory;
import org.apache.hadoop.hive.serde2.typeinfo.PrimitiveTypeInfo;
import java.sql.Date;
/**
* Casts a timestamp and date vector to a date vector.
*/
public class CastLongToDate extends VectorExpression {
private static final long serialVersionUID = 1L;
private int inputColumn;
private transient Date date = new Date(0);
public CastLongToDate() {
super();
}
public CastLongToDate(int inputColumn, int outputColumnNum) {
super(outputColumnNum);
this.inputColumn = inputColumn;
}
@Override
public void evaluate(VectorizedRowBatch batch) throws HiveException {
if (childExpressions != null) {
super.evaluateChildren(batch);
}
LongColumnVector inV = (LongColumnVector) batch.cols[inputColumn];
int[] sel = batch.selected;
int n = batch.size;
LongColumnVector outV = (LongColumnVector) batch.cols[outputColumnNum];
if (n == 0) {
// Nothing to do
return;
}
PrimitiveCategory primitiveCategory =
((PrimitiveTypeInfo) inputTypeInfos[0]).getPrimitiveCategory();
switch (primitiveCategory) {
case DATE:
inV.copySelected(batch.selectedInUse, batch.selected, batch.size, outV);
break;
default:
throw new Error("Unsupported input type " + primitiveCategory.name());
}
}
@Override
public String vectorExpressionParameters() {
return getColumnParamString(0, inputColumn);
}
@Override
public VectorExpressionDescriptor.Descriptor getDescriptor() {
VectorExpressionDescriptor.Builder b = new VectorExpressionDescriptor.Builder();
b.setMode(VectorExpressionDescriptor.Mode.PROJECTION)
.setNumArguments(1)
.setArgumentTypes(
VectorExpressionDescriptor.ArgumentType.DATE)
.setInputExpressionTypes(
VectorExpressionDescriptor.InputExpressionType.COLUMN);
return b.build();
}
}