fix: do not transform presto map keys #1021
Merged
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This is a fix for #991
example query that fails:
The reason is that MAP is converted to Python dict, but Python dict cannot have keys with type
list
(which is what ARRAY gets translated to).When Presto output rows in JSON, the keys are already serialized to strings, which means they are not parsable anyway, in this case, we just do not translate the keys at all.
Also added testing