Examples of org.apache.hadoop.hbase.client.HBaseAdmin.tableExists()

Class org.apache.hadoop.hbase.client.HBaseAdmin

Examples of org.apache.hadoop.hbase.client.HBaseAdmin.tableExists()

org.apache.hadoop.hbase.client.HBaseAdmin.tableExists()
@param tableName Table to check. @return True if table exists already. @throws IOException

    tableDesc.addFamily(new HColumnDescriptor(Bytes.toBytes("key")));
    tableDesc.addFamily(new HColumnDescriptor(Bytes.toBytes("familyone")));
    tableDesc.addFamily(new HColumnDescriptor(Bytes.toBytes("familytwo")));


    hAdmin.createTable(tableDesc);
    boolean doesTableExist = hAdmin.tableExists(tableName);
    assertTrue(doesTableExist);


    hcatDriver.run("drop table mytabletwo");
    CommandProcessorResponse response = hcatDriver
        .run("create external table mytabletwo(key int, valueone string, valuetwo string) STORED BY " +

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    assertEquals(0, responseOne.getResponseCode());
    CommandProcessorResponse responseTwo = hcatDriver.run(tableQuery);
    assertEquals(0, responseTwo.getResponseCode());


    HBaseAdmin hAdmin = new HBaseAdmin(getHbaseConf());
    boolean doesTableExist = hAdmin.tableExists(hbaseTableName);
    assertTrue(doesTableExist);


    populateHBaseTable(hbaseTableName, 5);
    Configuration conf = new Configuration(hcatConf);
    conf.set(HCatConstants.HCAT_KEY_HIVE_CONF,

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    String dropTableQuery = "DROP TABLE " + hbaseTableName ;
    CommandProcessorResponse responseThree = hcatDriver.run(dropTableQuery);
    assertEquals(0, responseThree.getResponseCode());


    boolean isHbaseTableThere = hAdmin.tableExists(hbaseTableName);
    assertFalse(isHbaseTableThere);


    String dropDB = "DROP DATABASE " + databaseName;
    CommandProcessorResponse responseFour = hcatDriver.run(dropDB);
    assertEquals(0, responseFour.getResponseCode());

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    CommandProcessorResponse responseTwo = hcatDriver.run(tableQuery);
    assertEquals(0, responseTwo.getResponseCode());


    HBaseAdmin hAdmin = new HBaseAdmin(getHbaseConf());
    boolean doesTableExist = hAdmin.tableExists(hbaseTableName);
    assertTrue(doesTableExist);


    populateHBaseTable(hbaseTableName, 5);


    Configuration conf = new Configuration(hcatConf);

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    String dropTableQuery = "DROP TABLE " + tableName;
    CommandProcessorResponse responseThree = hcatDriver.run(dropTableQuery);
    assertEquals(0, responseThree.getResponseCode());


    boolean isHbaseTableThere = hAdmin.tableExists(hbaseTableName);
    assertFalse(isHbaseTableThere);
  }




  static class MapReadHTable

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    }


    protected void createSchema() throws IOException {
      HBaseAdmin admin = new HBaseAdmin(getConf());
      byte[] tableName = getTableName(getConf());
      if (!admin.tableExists(tableName)) {
        HTableDescriptor htd = new HTableDescriptor(getTableName(getConf()));
        htd.addFamily(new HColumnDescriptor(FAMILY_NAME));
        admin.createTable(htd);
      }
      admin.close();

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  }
  
  @Override
  public void assertSchemaExists(String schemaName) throws Exception {
    HBaseAdmin admin = getTestDriver().getHbaseUtil().getHBaseAdmin();
    Assert.assertTrue(admin.tableExists(schemaName));
  }


  @Override
  public void assertPutArray() throws IOException { 
    HTable table = new HTable("WebPage");

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   * @param cfs the column families
   * @throws IOException
   */
  public void ensureTable(byte[] tableName, byte[][] cfs) throws IOException {
    HBaseAdmin admin = htu.getHBaseAdmin();
    if (!admin.tableExists(tableName)) {
      htu.createTable(tableName, cfs);
    }
  }


  /**

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    // Check to see if the table exists.
    HTableDescriptor tableDesc = null;
    byte [] familyBytes = Bytes.toBytes(familyName);
    HColumnDescriptor colDesc = new HColumnDescriptor(familyBytes);
    if (!admin.tableExists(tableName)) {
      if (options.getCreateHBaseTable()) {
        // Create the table.
        LOG.info("Creating missing HBase table " + tableName);
        tableDesc =  new HTableDescriptor(tableName);
        tableDesc.addFamily(colDesc);

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   * @throws IOException
   */
  private static void createTable(Configuration conf, String htableName, String... families) throws MasterNotRunningException, ZooKeeperConnectionException,
      IOException {
    HBaseAdmin hbase = new HBaseAdmin(conf);
    if (!hbase.tableExists(htableName)) {
      HTableDescriptor desc = new HTableDescriptor(htableName);
      for (String s : families) {
        HColumnDescriptor meta = new HColumnDescriptor(s);
        desc.addFamily(meta);
      }

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