exec/java-exec/src/test/java/org/apache/drill/exec/store/parquet/columnreaders/TestColumnReaderFactory.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.store.parquet.columnreaders;

import org.apache.drill.categories.ParquetTest;
import org.apache.drill.categories.UnlikelyTest;
import org.apache.drill.test.BaseTestQuery;
import org.apache.drill.exec.planner.physical.PlannerSettings;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.experimental.categories.Category;

@Category({ParquetTest.class, UnlikelyTest.class})
public class TestColumnReaderFactory extends BaseTestQuery {

  @BeforeClass
  public static void enableDecimalDataType() {
    alterSession(PlannerSettings.ENABLE_DECIMAL_DATA_TYPE_KEY, true);
  }

  @AfterClass
  public static void disableDecimalDataType() {
    resetSessionOption(PlannerSettings.ENABLE_DECIMAL_DATA_TYPE_KEY);
  }

  /**
   * check if Time and TimeStamp are read correctly with dictionary encoding.
   */
  @Test
  public void testTimeAndTimeStampWithDictionary() throws Exception {
    // the file 'time_dictionary.parquet' uses a PLAIN_DICTIONARY encoding and contains 4 columns:
    // time_opt: INT32/TIME_MILLIS/OPTIONAL
    // time_req: INT32/TIME_MILLIS/REQUIRED
    // timestampt_opt: INT64/TIMESTAMP_MILLIS/OPTIONAL
    // timestampt_req: INT64/TIMESTAMP_MILLIS/REQUIRED

    // query parquet file. We shouldn't get any exception
    testNoResult("SELECT * FROM cp.`parquet/time_dictionary.parquet`");
  }

  /**
   * check if Time and TimeStamp are read correctly with plain encoding.
   */
  @Test
  public void testTimeAndTimeStampWithNoDictionary() throws Exception {
    // the file 'time_dictionary.parquet' uses a PLAIN encoding and contains 4 columns:
    // time_opt: INT32/TIME_MILLIS/OPTIONAL
    // time_req: INT32/TIME_MILLIS/REQUIRED
    // timestampt_opt: INT64/TIMESTAMP_MILLIS/OPTIONAL
    // timestampt_req: INT64/TIMESTAMP_MILLIS/REQUIRED

    // query parquet file. We shouldn't get any exception
    testNoResult("SELECT * FROM cp.`parquet/time_nodictionary.parquet`");
  }

  /**
   * check if Decimal9 and Decimal18 are read correctly with dictionary encoding.
   */
  @Test
  public void testDecimal9AndDecimal18WithDictionary() throws Exception {
    // the file 'decimal_dictionary.parquet' uses a PLAIN_DICTIONARY encoding and contains 4 columns:
    // d9_opt: INT32/DECIMAL9/OPTIONAL
    // d9_req: INT32/DECIMAL9/REQUIRED
    // d18_opt: INT64/DECIMAL18/OPTIONAL
    // d18_req: INT64/DECIMAL18/REQUIRED

    // query parquet file. We shouldn't get any exception
    testNoResult("SELECT * FROM cp.`parquet/decimal_dictionary.parquet`");
  }

  /**
   * check if Decimal9 and Decimal18 are read correctly with plain encoding.
   */
  @Test
  public void testDecimal9AndDecimal18WithNoDictionary() throws Exception {
    // the file 'decimal_dictionary.parquet' uses a PLAIN encoding and contains 4 columns:
    // d9_opt: INT32/DECIMAL9/OPTIONAL
    // d9_req: INT32/DECIMAL9/REQUIRED
    // d18_opt: INT64/DECIMAL18/OPTIONAL
    // d18_req: INT64/DECIMAL18/REQUIRED

    // query parquet file. We shouldn't get any exception
    testNoResult("SELECT * FROM cp.`parquet/decimal_nodictionary.parquet`");
  }
}