exec/java-exec/src/main/java/org/apache/drill/exec/vector/complex/fn/DateOutputFormat.java

/*
 * 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.drill.exec.vector.complex.fn;

/**
 * Describes the default date output format to use for JSON. Drill's default behavior for text output formats is to use
 * a string which can be implicitly casted back to its original type (so the same format as the SQL literal format where
 * applicable). However, in JSON, we also can use extended types to specifically identify the data type of the output.
 * In this case, Drill outputs ISO standard formats rather than SQL formats to ensure comaptibility with other systems
 * (namely MongoDB).
 */
public enum DateOutputFormat {
  /**
   * The SQL literal format for dates.  This means no timezone in times and a space in between the date and time for timestamp.
   */
  SQL,

  /**
   * The ISO standard format for dates/times.
   */
  ISO
}