Enable partitioning in custom dataset

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Enable partitioning in custom dataset

I am trying to implement enabling partitioning in plugin custom dataset. And there are several functions in skeleton waiting for implementing eg. "get_partitioning", "list_partitions", "partittion_exists", "get_records_count".

Screenshot 2023-12-08 145947.png

If I understand correctly, get_partitioning method is mainly to return what partitioning schema I am going to split based on. And list_partitioning method should list out all possible value of partition. But what is "partition_exists" and "get_records_count" method mainly for and in what stage or timing will these two methods be triggered?

And what is the corresponding flag mentioned here?

Screenshot 2023-12-08 150123.png

Operating system used: Windows

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