Hive 3.1无法创建从内部/托管表复制架构的外部表

问题描述

我们尝试制作一个外部配置单元表，该模式的结构与现有的内部/托管表相似，下一步将插入ecternal的数据。

下面的代码使用托管表的复制模式创建外部表

CREATE EXTERNAL TABLE IF NOT EXISTS sls_test_ext like sls_test
ROW FORMAT DELIMITED 
FIELDS TERMINATED BY ","
LINES TERMINATED BY "\n"
LOCATION "/bla/bla/";

但是执行后，它会返回如下

ERROR : FAILED: Execution Error,return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. MetaException(message:sp2020.sls_test_ext cannot be declared transactional because it's an external table)
INFO  : Completed executing command(queryId=hive_20201111233927_593d38ff-39ed-412e-b128-41d949a3a476); Time taken: 0.017 seconds
Error: Error while processing statement: FAILED: Execution Error,return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. MetaException(message:sp2020.sls_test_ext cannot be declared transactional because it's an external table) (state=08S01,code=1)

然后我们尝试如下修改上面的代码

CREATE EXTERNAL TABLE IF NOT EXISTS sls_test_ext like sls_test
ROW FORMAT DELIMITED 
FIELDS TERMINATED BY ","
LINES TERMINATED BY "\n"
LOCATION "/bla/bla/"
TBLPROPERTIES ("transactional"="false");

它将返回相同的错误。 是否缺少任何代码或需要更改的配置单元

NB：托管表是使用sqoop import配置单元表自动创建的 ？

解决方法

您可以尝试以下解决方案：

托管表：

CREATE TABLE sls_test(<columns>)
ROW FORMAT DELIMITED
FIELDS TERMINATED BY ',';

外部表格：

CREATE EXTERNAL TABLE IF NOT EXISTS sls_test_ext
LIKE sls_test
LOCATION '/bla/bla/';