fix(function): Const(Nullable(Object)) column downcast to Nullable failed

[b41sh]

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Summary

If the column is Const(Nullable(Object)), it will panic when downcast to Nullable(Object) column.

There is one more issue to be concerned about. The column data type returned by the storage is a little different. If the engine is FUSE, it will return the Nullable column, but if the engine is Memory, it will return the Const Nullable column.

Changelog

• Bug Fix

Related Issues

#4684

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