use of org.apache.hadoop.hive.ql.exec.vector.expressions.gen.FuncLnDoubleToDouble in project hive by apache.
the class TestVectorMathFunctions method testVectorLn.
@Test
public void testVectorLn() {
// test double->double version
VectorizedRowBatch b = getVectorizedRowBatchDoubleInDoubleOut();
DoubleColumnVector resultV = (DoubleColumnVector) b.cols[1];
b.cols[0].noNulls = true;
VectorExpression expr = new FuncLnDoubleToDouble(0, 1);
expr.evaluate(b);
Assert.assertEquals(Math.log(0.5), resultV.vector[4]);
// test long->double version
b = getVectorizedRowBatchLongInDoubleOut();
resultV = (DoubleColumnVector) b.cols[1];
b.cols[0].noNulls = true;
expr = new FuncLnLongToDouble(0, 1);
expr.evaluate(b);
Assert.assertEquals(Math.log(2), resultV.vector[4]);
}
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