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add docs
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@ -42,3 +42,4 @@ PRIMARY KEY key
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- `primary key` must be specified, only support one primary key. The primary key will serializeBinary as rocksdb key.
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- Columns other than the primary key will be serializeBinary as rocksdb value in corresponding order.
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- Queries with key `equals` or `in` filtering will be optimized to multi keys look up from rocksdb.
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