Answer: _rescued_data

Auto Loader adds a `_rescued_data` column automatically when it infers the schema. This column captures any data that doesn't match the schema due to missing columns, type mismatches, or case mismatches, ensuring no data is lost. The data is stored in JSON format within this column, including the source file path of the record. You can rename this column or include it explicitly by setting the `rescuedDataColumn` option.

Author: LeetQuiz Editorial Team