MySQL 8.4 Release Notes
ST_UNITS_OF_MEASURE 表提供关于 ST_Distance() 函数可接受单位的信息。The ST_UNITS_OF_MEASURE table
provides information about acceptable units for the
ST_Distance() function.
ST_UNITS_OF_MEASURE 表具有以下列：The ST_UNITS_OF_MEASURE table has
these columns:
UNIT_NAME单位名称。The name of the unit.
UNIT_TYPE单位类型（例如，
LINEAR）。The unit type (for example,LINEAR).CONVERSION_FACTOR用于内部计算的转换因子。A conversion factor used for internal calculations.
DESCRIPTIONDESCRIPTION该单位的描述。A description of the unit.