com.cloudera.sqoop.TestFreeFormQueryImport.java Source code

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Here is the source code for com.cloudera.sqoop.TestFreeFormQueryImport.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.
 */

package com.cloudera.sqoop;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IOUtils;

import com.cloudera.sqoop.testutil.CommonArgs;
import com.cloudera.sqoop.testutil.ImportJobTestCase;

/**
 * Test free form query import.
 */
public class TestFreeFormQueryImport extends ImportJobTestCase {

    private Log log;

    public TestFreeFormQueryImport() {
        this.log = LogFactory.getLog(TestFreeFormQueryImport.class.getName());
    }

    /**
     * @return the Log object to use for reporting during this test
     */
    protected Log getLogger() {
        return log;
    }

    /** the names of the tables we're creating. */
    private List<String> tableNames;

    @Override
    public void tearDown() {
        // Clean up the database on our way out.
        for (String tableName : tableNames) {
            try {
                dropTableIfExists(tableName);
            } catch (SQLException e) {
                log.warn("Error trying to drop table '" + tableName + "' on tearDown: " + e);
            }
        }
        super.tearDown();
    }

    /**
     * Create the argv to pass to Sqoop.
     * @param splitByCol column of the table used to split work.
     * @param query free form query to be used.
     * @return the argv as an array of strings.
     */
    protected String[] getArgv(String splitByCol, String query) {
        ArrayList<String> args = new ArrayList<String>();

        CommonArgs.addHadoopFlags(args);

        args.add("--connect");
        args.add(getConnectString());
        args.add("--target-dir");
        args.add(getWarehouseDir());
        args.add("--split-by");
        args.add(splitByCol);
        args.add("--num-mappers");
        args.add("2");
        args.add("--query");
        args.add(query);

        return args.toArray(new String[0]);
    }

    /**
     * Create two tables that share the common id column.  Run free-form query
     * import on the result table that is created by joining the two tables on
     * the id column.
     */
    public void testSimpleJoin() throws IOException {
        tableNames = new ArrayList<String>();

        String[] types1 = { "SMALLINT", };
        String[] vals1 = { "1", };
        String tableName1 = getTableName();
        createTableWithColTypes(types1, vals1);
        tableNames.add(tableName1);

        incrementTableNum();

        String[] types2 = { "SMALLINT", "VARCHAR(32)", };
        String[] vals2 = { "1", "'foo'", };
        String tableName2 = getTableName();
        createTableWithColTypes(types2, vals2);
        tableNames.add(tableName2);

        String query = "SELECT " + tableName1 + "." + getColName(0) + ", " + tableName2 + "." + getColName(1) + " "
                + "FROM " + tableName1 + " JOIN " + tableName2 + " ON (" + tableName1 + "." + getColName(0) + " = "
                + tableName2 + "." + getColName(0) + ") WHERE " + tableName1 + "." + getColName(0)
                + " < 3 AND $CONDITIONS";

        runImport(getArgv(tableName1 + "." + getColName(0), query));

        Path warehousePath = new Path(this.getWarehouseDir());
        Path filePath = new Path(warehousePath, "part-m-00000");
        String expectedVal = "1,foo";

        BufferedReader reader = null;
        if (!isOnPhysicalCluster()) {
            reader = new BufferedReader(new InputStreamReader(new FileInputStream(new File(filePath.toString()))));
        } else {
            FileSystem dfs = FileSystem.get(getConf());
            FSDataInputStream dis = dfs.open(filePath);
            reader = new BufferedReader(new InputStreamReader(dis));
        }
        try {
            String line = reader.readLine();
            assertEquals("QueryResult expected a different string", expectedVal, line);
        } finally {
            IOUtils.closeStream(reader);
        }
    }
}