Support registry external function in connector and implement a example in the mysql jdbc connector;
store external function stored in memory;
Support push external function push down to jdbc connector and add mysql connector example.
Co-Author: bryawongsz <bryanwangsz@163.com>
Co-Author: Yize Li <liyizeyouxiang@live.cn>
Co-Author: chenpingzeng <chenpingzeng@huawei.com>
Co-Author: wyy566 <531938832@qq.com>
1. Removed the filter type saved in state-store
2. Refactored DynamicFilterService logic
3. Fixed extract expression symbol in DynamicFilterService with CAST expressions
4. Reduced synchronization scope in LocalDynamicFilterCollector methods to reduce blocking time
5. Added getOrCreateStateCollection in StateStore
6. Moved DynamicFilter classes back to spi
1. Use internal BloomFilter instead of Guava BloomFilter for better performance
2. Improve row filtering logic using DynamicFilter for better performance
3. Moved BloomFilter and DynamicFilter implementations to hetu-common
4. Refactored DynamicFilter related classes
Raghunandan