ColumnDataType

Enums
COLUMN_DATA_TYPE_UNSPECIFIED Default enum value, no effect on types. Do not use.
COLUMN_DATA_TYPE_STRING The associated column should be treated as a string (in the same encoding as the input file, if the file is CSV). Useful if the column is auto-detected as numeric.
COLUMN_DATA_TYPE_NUMERIC The associated column should be treated as a numeric (useful for columns with no data, which become strings by default).
COLUMN_DATA_TYPE_LONG The associated column should be treated as a long.