DanielLeens commented on issue #12754:
URL: https://github.com/apache/seatunnel/issues/12754#issuecomment-6145193543

   Thanks for separating the type families and testing them against Doris 
4.0.6. The current converter does not recognize IPV4, IPV6, STRUCT, or the 
metadata value reported as TIMESTAMP, so the catalog failures are expected from 
the present switch. They should not be fixed as one broad mapping change.
   
   Please start with one focused PR for IPV4 and IPV6 only, mapping them to 
STRING while retaining their source types and adding catalog plus value 
coverage. Keep STRUCT separate because it needs a deliberate nested SeaTunnel 
schema contract. Keep TIMESTAMPTZ separate as well: `information_schema` 
reporting only `timestamp` means the current catalog input cannot distinguish 
it from ordinary TIMESTAMP, so it must not be mapped to a timezone-aware 
logical type without a reliable metadata source and round-trip semantics. 
BITMAP/HLL/QUANTILE_STATE are also outside this first scope. Please link the 
IPV4/IPV6 PR here.


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