Caizhi Weng created FLINK-13490:
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Summary: Fix return null in JDBCUtils::getFieldFromResultSet
Key: FLINK-13490
URL: https://issues.apache.org/jira/browse/FLINK-13490
Project: Flink
Issue Type: Sub-task
Components: Connectors / JDBC
Reporter: Caizhi Weng
Fix For: 1.9.0, 1.10.0
The null checking in `JDBCUtils::getFieldFromResultSet` is incorrect. Under the
current implementation, if one column is null in the result set, the following
calls to this method using the same result set will always return null, no
matter what the content of the column is.
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