TestComplexColumnInSchema.java Source code

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Here is the source code for TestComplexColumnInSchema.java

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/*
 * 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.
 */
import org.apache.drill.common.expression.SchemaPath;
import org.apache.drill.exec.store.parquet.ParquetReaderUtility;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.parquet.hadoop.metadata.ParquetMetadata;
import org.apache.parquet.hadoop.ParquetFileReader;

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import org.junit.BeforeClass;
import org.junit.Test;

import java.util.List;
import java.util.ArrayList;

import java.io.IOException;

/**
 * This test checks correctness of complex column detection in the Parquet file schema.
 */
public class TestComplexColumnInSchema {

    /*
    Parquet schema:
      message root {
        optional int64 id;
        optional binary a (UTF8);
        repeated int64 repeated;
        optional binary VariableCase (UTF8);
        optional group nested {
    optional int64 id;
    repeated int64 repeated;
    optional binary VaRiAbLeCaSe (UTF8);
        }
      }
        
     Data set:
     complex_special_cases.parquet
     {
       "id": 1,
       "a": "some string",
       "repeated": [1, 2],
       "VariableCase": "top level variable case column",
       "nested": {
         "id": 2,
         "repeated": [3, 4],
         "VaRiAbLeCaSe": "nested variable case column"
       }
     }
     */
    private static final String path = "src/test/resources/store/parquet/complex/complex_special_cases.parquet";
    private static ParquetMetadata footer;

    @BeforeClass
    public static void setup() throws IOException {
        Configuration conf = new Configuration();

        footer = ParquetFileReader.readFooter(conf, new Path(path));
    }

    @Test
    public void testGroupTypeColumn() {
        List<SchemaPath> columns = new ArrayList<>();
        columns.add(SchemaPath.getCompoundPath("nested"));
        assertTrue("GroupType column must be detected as complex",
                ParquetReaderUtility.containsComplexColumn(footer, columns));
    }

    @Test
    public void testNestedColumn() {
        List<SchemaPath> columns = new ArrayList<>();
        columns.add(SchemaPath.getCompoundPath("nested", "id"));
        assertTrue("Nested column must be detected as complex",
                ParquetReaderUtility.containsComplexColumn(footer, columns));
    }

    @Test
    public void testCombinedColumns() {
        List<SchemaPath> columns = new ArrayList<>();
        columns.add(SchemaPath.getCompoundPath("id"));
        columns.add(SchemaPath.getCompoundPath("nested", "id"));
        assertTrue("Nested column in the list list must be detected as complex",
                ParquetReaderUtility.containsComplexColumn(footer, columns));
    }

    @Test
    public void testSimpleColumn() {
        List<SchemaPath> columns = new ArrayList<>();
        columns.add(SchemaPath.getCompoundPath("id"));
        assertFalse("No complex column must be detected",
                ParquetReaderUtility.containsComplexColumn(footer, columns));
    }

    @Test
    public void testSimpleColumns() {
        List<SchemaPath> columns = new ArrayList<>();
        columns.add(SchemaPath.getCompoundPath("id"));
        columns.add(SchemaPath.getCompoundPath("a"));
        assertFalse("No complex columns must be detected",
                ParquetReaderUtility.containsComplexColumn(footer, columns));
    }

    @Test
    public void testNonexistentColumn() {
        List<SchemaPath> columns = new ArrayList<>();
        columns.add(SchemaPath.getCompoundPath("nonexistent"));
        assertFalse("No complex column must be detected",
                ParquetReaderUtility.containsComplexColumn(footer, columns));
    }

    @Test
    public void testVariableCaseColumn() {
        List<SchemaPath> columns = new ArrayList<>();
        columns.add(SchemaPath.getCompoundPath("variablecase"));
        assertFalse("No complex column must be detected",
                ParquetReaderUtility.containsComplexColumn(footer, columns));
    }

    @Test
    public void testVariableCaseSchemaPath() {
        List<SchemaPath> columns = new ArrayList<>();
        columns.add(SchemaPath.getCompoundPath("VaRiAbLeCaSe"));
        assertFalse("No complex column must be detected",
                ParquetReaderUtility.containsComplexColumn(footer, columns));
    }

    @Test
    public void testNestedVariableCaseColumn() {
        List<SchemaPath> columns = new ArrayList<>();
        columns.add(SchemaPath.getCompoundPath("nested", "variablecase"));
        assertTrue("Nested variable case column must be detected as complex",
                ParquetReaderUtility.containsComplexColumn(footer, columns));
    }

    @Test
    public void testRepeatedColumn() {
        List<SchemaPath> columns = new ArrayList<>();
        columns.add(SchemaPath.getCompoundPath("repeated"));
        assertTrue("Repeated column must be detected as complex",
                ParquetReaderUtility.containsComplexColumn(footer, columns));
    }

    @Test
    public void testNestedRepeatedColumn() {
        List<SchemaPath> columns = new ArrayList<>();
        columns.add(SchemaPath.getCompoundPath("nested", "repeated"));
        assertTrue("Nested repeated column must be detected as complex",
                ParquetReaderUtility.containsComplexColumn(footer, columns));
    }
}