*************************** 1. row ***************************

        VARIABLE_NAME: HISTOGRAM_TYPE

        SESSION_VALUE: DOUBLE_PREC_HB

         GLOBAL_VALUE: DOUBLE_PREC_HB

  GLOBAL_VALUE_ORIGIN: COMPILE-TIME

        DEFAULT_VALUE: DOUBLE_PREC_HB

       VARIABLE_SCOPE: SESSION

        VARIABLE_TYPE: ENUM

     VARIABLE_COMMENT: Specifies type of the histograms created by ANALYZE. Possible values are: SINGLE_PREC_HB - single precision height-balanced, DOUBLE_PREC_HB - double precision height-balanced.

    NUMERIC_MIN_VALUE: NULL

    NUMERIC_MAX_VALUE: NULL

   NUMERIC_BLOCK_SIZE: NULL

      ENUM_VALUE_LIST: SINGLE_PREC_HB,DOUBLE_PREC_HB,JSON_HB

            READ_ONLY: NO

COMMAND_LINE_ARGUMENT: REQUIRED

    GLOBAL_VALUE_PATH: NULL

1 row in set (0.003 sec)

$ sql/mysqld --help --verbose

<...>

  --histogram-type=name 

                      Specifies type of the histograms created by ANALYZE.

                      Possible values are: SINGLE_PREC_HB - single precision

                      height-balanced, DOUBLE_PREC_HB - double precision

                      height-balanced.