Kezhu Wang created FLINK-20657:
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             Summary: Migrate jdbc connection code of JdbcInputFormat, 
JdbcLookupFunction, JdbcRowDataLookupFunction to SimpleJdbcConnectionProvider
                 Key: FLINK-20657
                 URL: https://issues.apache.org/jira/browse/FLINK-20657
             Project: Flink
          Issue Type: Improvement
          Components: Connectors / JDBC
    Affects Versions: 1.13.0
            Reporter: Kezhu Wang


Currently, there are multiple places to establish jdbc connection, several of 
them were written before introducing of {{JdbcConnectionProvider}} in 
FLINK-15782. We need to migrate these classes for reasons:
* Code reusability.
* Circumvent pitfalls of {{DriverManager}} such as FLINK-19435 and possible 
[others|https://ci.apache.org/projects/tomcat/tomcat85/docs/jndi-datasource-examples-howto.html#DriverManager,_the_service_provider_mechanism_and_memory_leaks]
 in one place.



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