THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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- Introduce some public interfaces for supporting other dialects in flink-table-api-jave module
- Introduce a slim module called flink-table-calcite-bridge providing calcite dependencys dependency as a part of migrating Hive dialect. It's just a tempory way to migrate Hive dialect, the specific dependencys dependency or logic should be dropped at the end.
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