Support Decimal256 column in create external table #7865
Description
Is your feature request related to a problem or challenge?
In sqltests decimal.slt, we can create external table which contains decimal128 columns to test. But for decimal256, create external table statement cannot create decimal256 column for now.
We should support decimal256 column in the statement to help test decimal256 features.
Describe the solution you'd like
Support Decimal256 column in create external table.
Describe alternatives you've considered
No response
Additional context
No response