min_varchar

Default: 0
Range: 0 to 255
Recommended Value: 4

This parameter supplements the use_varchar configuration file parameter by adding the condition that the length must be at least equal to the value of this parameter. Setting this parameter value to 4 would force columns whose data types would have been VARCHAR(1), VARCHAR(2), or VARCHAR(3) to instead be CHAR(1), CHAR(2), and CHAR(3) if use_varchar is set to True.

Note: Setting this parameter to a non-zero value when use_varchar is set to False has no effect.