[jira] [Created] (FLINK-16781) add built-in cache mechanism for LookupableTableSource in lookup join

[Shang Yuanchun (Jira)]

Bowen Li created FLINK-16781:
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             Summary: add built-in cache mechanism for LookupableTableSource in lookup join
                 Key: FLINK-16781
                 URL: https://issues.apache.org/jira/browse/FLINK-16781
             Project: Flink
          Issue Type: Improvement
          Components: Table SQL / API
            Reporter: Bowen Li


Currently there's no built-in cache mechanism for LookupableTableSource. Developers have to either build their own cache or give up caching and bear with poor lookup performance.

Flink should provide a generic caching layer for all the LookupableTableSource to take advantage of.

cc [~ykt836] [~jark] [~lzljs3620320]



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