[jira] [Created] (FLINK-18976) Support user defined query in JDBC Source

[Leonard Xu (Jira)]

Leonard Xu created FLINK-18976:
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             Summary: Support user defined query in JDBC Source
                 Key: FLINK-18976
                 URL: https://issues.apache.org/jira/browse/FLINK-18976
             Project: Flink
          Issue Type: Improvement
          Components: Connectors / JDBC
            Reporter: Leonard Xu


User may want to filter some useless data before loading data from a DB table, 
we can expose a `connector.read.query` to support this feature in DDL.

 



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