v.21.9Backward Incompatible Changes
Do not apply parametric aggregate functions with different parameters for state finalization
Do not allow to apply parametric aggregate function with-Mergecombinator to aggregate function state if state was produced by aggregate function with different parameters. For example, state offooState(42)(x)cannot be finalized withfooMerge(s)orfooMerge(123)(s), parameters must be specified explicitly likefooMerge(42)(s)and must be equal. It does not affect some special aggregate functions likequantileandsequence*that use parameters for finalization only. #26847 (tavplubix).