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### 1. `variant_doc_materialization_min_rows` - Remove the restriction that prevented modifying this variant column property via `ALTER TABLE MODIFY COLUMN`. - This property controls the minimum row threshold for materializing variant sub-columns. The change is propagated via Light Schema Change. ### 2. `vertical_compaction_num_columns_per_group` - Allow modifying this table property via `ALTER TABLE SET(...)`. This controls how many columns are merged in each group during vertical compaction. - For wide variant tables, reducing this value significantly reduces peak memory usage during compaction.