content: /*
   * 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.beam.sdk.extensions.sql.impl.udf;
  
  import com.google.auto.service.AutoService;
  import org.apache.beam.sdk.schemas.Schema;
  
  /**
   * IS_NAN(X)
   *
   * <p>Returns TRUE if the value is a NaN value. Returns NULL for NULL inputs. input: Float, Double
   *
   * <p>Output: Boolean
   */
  @AutoService(BeamBuiltinFunctionProvider.class)
  public class IsNan extends BeamBuiltinFunctionProvider {
    private static final String SQL_FUNCTION_NAME = "IS_NAN";
  
    @UDF(
        funcName = SQL_FUNCTION_NAME,
        parameterArray = {Schema.TypeName.FLOAT},
        returnType = Schema.TypeName.BOOLEAN)
    public Boolean isNan(Float value) {
      return Float.isNaN(value);
    }
  
    @UDF(
        funcName = SQL_FUNCTION_NAME,
        parameterArray = {Schema.TypeName.DOUBLE},
        returnType = Schema.TypeName.BOOLEAN)
    public Boolean isNan(Double value) {
      return Double.isNaN(value);
    }
  }
  