官方文档，权威
http://cwiki.apachecn.org/pages/viewpage.action?pageId=10813620#Kudu%E9%9B%86%E6%88%90ApacheImpala-%E4%BD%BF%E7%94%A8ApacheKudu%E4%B8%8EApacheImpala%EF%BC%88%E5%AD%B5%E5%8C%96%EF%BC%89
impala官方文档：
https://www.cloudera.com/documentation/enterprise/latest/topics/impala_tables.html
