Does Pinot support change schema existing column name? I tried change a column name, but got following exceptions on query:

[
  {
    "errorCode": 500,
    "message": "MergeResponseError:\nData schema mismatch between merged block: [time_to_hour(LONG),age_decade(STRING),age_level(STRING),city(STRING),company_id(STRING),company_name(STRING),count_impression(LONG),count_in(LONG),count_passby(LONG),create_time(LONG),day(STRING),day_in_week(STRING),district(STRING),gate_id(STRING),gender(STRING),holiday_id(STRING),holiday_name(STRING),hour(STRING),is_holiday(STRING),month(STRING),province(STRING),region(STRING),shop_id(STRING),shop_name(STRING),temperature(STRING),temperature_id(STRING),total_duration(LONG),total_impression_duration(LONG),weather_cate_id(STRING),weather_cate_name(STRING),year(STRING)] and block to merge: [time_to_hour(LONG),age_decade(STRING),age_level(STRING),city(STRING),company_id(STRING),company_name(STRING),count_impression(LONG),count_in(LONG),count_passby(LONG),create_time(LONG),day(STRING),day_in_week(STRING),district(STRING),gate_id(STRING),gender(STRING),holiday_id(STRING),holiday_name(STRING),hour(STRING),is_holiday(STRING),month(STRING),province(STRING),region(STRING),shop_id(STRING),shop_name(STRING),temperature(STRING),temperature_id(STRING),total_duration(LONG),total_impression_duraion(LONG),weather_cate_id(STRING),weather_cate_name(STRING),year(STRING)], drop block to merge"
  }
]

Hello, schema evolution is supported as long as it is backward compatible. Changing a column name or type is considered backward incompatible, and is not supported

Thanks, so in this case, I should delete all the segment and re-ingest all the data?

Yes, for incompatible schema change, that is the option