Impala – Use Incremental stats instead of Full Table stats

If you have a table which is partitioned on a column then doingCompute stats TABLE_NAMEwill execute on all partitions. Internally compute stats run NDV function on each column to get numbers. However NDV function works faster then other count(COLUMN), but it will run for each partition which may be irrelevant when you are working/updating/modifying values … Read more