anchor.diff:  volume that a query might generate.
   
   
  +`VarcharLimit` (default: `0`)::
  +The maximum width of the string columns.
  +If this setting is greater than zero, the driver will advertise all the string
  +type columns as having a maximum character length equal to this value and will
  +truncate any longer string to it. The string types are textual fields
  +(TEXT, KEYWORD etc.) and some specialized fields (IP, the GEOs etc.). Note that
  +no interpretation of the value is performed before trunctation, which can lead
  +to invalid values if the limit is set too low.
  +This is required for those applications that do not support column lengths as
  +large as {es} fields can be.
  +
  +
   `ApplyTZ` (default: `no`)::
   A boolean value controlling the timezone of:
   
  
positive.code: If this parameter is `true`, the server will include the frozen indices in the
  query execution.
  This corresponds to {es-sql}'s request parameter `index_include_frozen`
  (see <<sql-rest-fields>>).
  
  
negative.code: supported by {es-sql}.
  This setting is not effective when the application fetches from the driver the
  values as numbers and then does the conversion subsequently itself.
  
  
  `MultiFieldLenient` (default: `true`)::
  