从Oracle date 到 hdfs orc 文件 timestamp 问题
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- Dominant language
- Java
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Description
代码com.alibaba.datax.plugin.writer.hdfswriter.HdfsHelper#orcFileStartWrite 方法可以写进hdfs ， 但是hive 查询查不出，报错orc does not support type conversion from file type struct(9)>
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Research direction
Start at com.alibaba.datax.plugin.writer.hdfswriter.HdfsHelper#orcFileStartWrite and trace how an Oracle DATE is written to the HDFS ORC file. Reproduce the Hive query failure involving struct(9), then determine whether the written ORC type matches Hive's expected timestamp type; done means Hive can query the generated file successfully.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- data-engineering, databases
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100