v.19.11Bug Fix

Fixed Irrelevant Exception in Cast of Lowcardinality(nullable) to Not-nullable Column in Case If It Does Not Contain Nulls (e.g

Official CH changelog text
Fixed irrelevant exception in cast of LowCardinality(Nullable) to not-Nullable column in case if it does not contain Nulls (e.g. in query like SELECT CAST(CAST('Hello' AS LowCardinality(Nullable(String))) AS String). #6094 #6119 (Nikolai Kochetov)
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