dingli123 created FLINK-17993:
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Summary: read schema from orc file
Key: FLINK-17993
URL: https://issues.apache.org/jira/browse/FLINK-17993
Project: Flink
Issue Type: Improvement
Components: Connectors / ORC
Reporter: dingli123
now , if we use OrcTableSource , we must provide schema info.
In fact, the orc file already store schema info in file.
(hive --orcfiledump can see the schema info)
so OrcTableSource can read schema info from orc file
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