SemanticException添加partiton Hive表

Question

尝试使用以下内容在Hive表上创建分区:

> alter table stock_ticker add if not exists
> partition(stock_symbol='ASP')
> location 'data/stock_ticker_sample/stock_symbol=ASP/'

这产生以下输出

FAILED : SemanticException table is not partitioned but partition spec exists: {stock_symbol=ASP} 

在此添加尝试之前,此表上没有分区

> show partitions stock_ticker;

结果

FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. 
Table stock_ticker_sample is not a partitioned table

毫无疑问,stock_symbol列存在且类型为string.

查询是为了添加此分区需要采取的步骤？

Answer 1

解决方案是将分区信息添加到stock_ticker表的定义中:

CREATE EXTERNAL TABLE stock_ticker (
... 
)
PARTITIONED BY (stock_symbol STRING);

然后,您可以通过以下方式将外部数据添加到表中

> alter table stock_ticker add if not exists
> partition(stock_symbol='ASP')
> location 'data/stock_ticker_sample/stock_symbol=ASP/'

GL!