databend
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optimize transform_serialize_block for scalar column
Summary
these steps in BlockBuilder.build covert block to full first.
- [x] BloomIndexState::from_data_block https://github.com/datafuselabs/databend/pull/15910
- [x] gen_columns_statistics https://github.com/datafuselabs/databend/pull/15909
the effect is verified by
https://github.com/datafuselabs/databend/pull/15880