SELECT x
FROM zydb.dual
UNION ALL
SELECT x
FROM zydb.dual
执行如上sql语句,可能会遇到如下错误:
[Simba][HiveJDBCDriver](500051) ERROR processing query/statement. Error Code: 42000, SQL state: Syntax error or access violation, Query: AEUnion is not supported. [SQL State=HY000, DB Errorcode=500051]
可能是JDBC版本问题,可以到https://www.cloudera.com/downloads/connectors/hive/jdbc/2-6-1.html下载最新版本