title: Hive / DynamoDB error "Could not find column mapping for column"
body: <p>I am running the following Hive query on an Amazon Elastic MapReduce EC2 instance:</p>
  
  <pre><code>CREATE EXTERNAL TABLE myExport (access_key string, active bigint,
      api_id string, secret_key string)
  STORED BY 'org.apache.hadoop.hive.dynamodb.DynamoDBStorageHandler'
  TBLPROPERTIES ("dynamodb.table.name" = "Authentication",
      "dynamodb.column.mapping" = "access_key:access_key, active:active, api_id:api_id, secret_key:secret_key");
  </code></pre>
  
  <p>I am trying to grab the contents of the <code>Authentication</code> DynamoDB table, but instead I am seeing the following error:</p>
  
  <pre><code>FAILED: Error in metadata: MetaException(message:Could not find column mapping for column: active)
  FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask
  </code></pre>