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https://issues.apache.org/jira/browse/FLINK-13503?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jing Zhang updated FLINK-13503:
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Summary: Correct the behavior of `JDBCLookupFunction` when input data has
null (was: Correct the behavior of `JDBCLookupFunction` )
> Correct the behavior of `JDBCLookupFunction` when input data has null
> ----------------------------------------------------------------------
>
> Key: FLINK-13503
> URL: https://issues.apache.org/jira/browse/FLINK-13503
> Project: Flink
> Issue Type: Task
> Components: Connectors / JDBC
> Affects Versions: 1.9.0, 1.10
> Reporter: Jing Zhang
> Priority: Minor
>
> The query template in `JdbcLookUpFunction` like:
> SELECT c, d, e, f from T where a = ? and b = ?
> If pass (null, 1) to `eval` method, it will generate the following query:
> SELECT c, d, e, f from T where a = null and b = ?
> Which always outputs empty records.
> Is this behavior reasonable?
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