ClickHouse

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Fix INSERT SELECT incorrectly fills MATERIALIZED column based of Nullable column Required columns of the default expression should not be converted to NULL, since this map value to default and MATERIALIZED values will not work. Consider the following structure: - A Nullable(Int64) - X Int64 materialized coalesce(A, -1) With recursive_null_as_default=true you will get: _CAST(coalesce(A, -1), 'Int64') AS X, NULL AS A And this will ignore default expression. Fixes: #23524 (Cc: @kssenii) Fixes: #29729 (Cc: @tavplubix) Backport: 21.7+ 2021-10-14 18:02:26 +00:00			`1 42 42`
			`1 42 42`