v.25.12Improvement
Add support of sparse serialization for columns
Added support of sparse serialization for columns of Nullable type. This continues #44539. #88999 (Amos Bird).Why it matters
This feature improves the efficiency of storing and transmittingNullable columns by enabling sparse serialization, reducing storage space and potentially improving performance when working with tables containing many null values. It continues the enhancement started in issue #44539.How to use it
This feature is applied automatically when serializingNullable columns using supported formats that benefit from sparse serialization. No additional user configuration is required.