morrySnow commented on PR #31312:
URL: https://github.com/apache/doris/pull/31312#issuecomment-1963835069

   cast `string` to `array` is ok, we parse it as json. string `'[1,2,3]'` cast 
to `array<string>` will produce text array with 3 elements: `'1'`, `'2'` and 
`'3'`. It is not ambiguous. All strings that do not meet the required format 
will be converted to `null`.


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