org.apache.hadoop.hive.ql.udf.generic.GenericUDFCeil Maven / Gradle / Ivy
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* 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
*
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* distributed under the License is distributed on an "AS IS" BASIS,
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package org.apache.hadoop.hive.ql.udf.generic;
import org.apache.hadoop.hive.common.type.HiveDecimal;
import org.apache.hadoop.hive.ql.exec.Description;
import org.apache.hadoop.hive.ql.exec.vector.VectorizedExpressions;
import org.apache.hadoop.hive.ql.exec.vector.expressions.gen.FuncCeilDecimalToDecimal;
import org.apache.hadoop.hive.ql.exec.vector.expressions.gen.FuncCeilDoubleToLong;
import org.apache.hadoop.hive.ql.exec.vector.expressions.gen.FuncCeilLongToLong;
import org.apache.hadoop.hive.serde2.io.DoubleWritable;
import org.apache.hadoop.hive.serde2.io.HiveDecimalWritable;
import org.apache.hadoop.io.LongWritable;
@Description(name = "ceil,ceiling",
value = "_FUNC_(x) - Find the smallest integer not smaller than x",
extended = "Example:\n"
+ " > SELECT _FUNC_(-0.1) FROM src LIMIT 1;\n"
+ " 0\n"
+ " > SELECT _FUNC_(5) FROM src LIMIT 1;\n" + " 5")
@VectorizedExpressions({FuncCeilLongToLong.class, FuncCeilDoubleToLong.class, FuncCeilDecimalToDecimal.class})
public final class GenericUDFCeil extends GenericUDFFloorCeilBase {
public GenericUDFCeil() {
super();
opDisplayName = "ceil";
}
@Override
protected LongWritable evaluate(DoubleWritable input) {
longWritable.set((long) Math.ceil(input.get()));
return longWritable;
}
@Override
protected HiveDecimalWritable evaluate(HiveDecimalWritable input) {
HiveDecimal bd = input.getHiveDecimal();
decimalWritable.set(bd.setScale(0, HiveDecimal.ROUND_CEILING));
return decimalWritable;
}
}