use sane value for length of string selected; merged with current master
use sane value for length of string selected; merged with current master

Freeaqingme/golang-sql-driver-mysql,rlowe/mysql,eXcomm/gomysql,muthusubbu459/mysql,helight/helight_code,cw2018/mysql,LightKool/mysql-go,siriele/mysql,segmentio/mysql,Vorstack/mysql,helight/helight_code,helight/helight_code,dalinaum/go-mysql-driver,methane/mysql,yonglehou/mysql,eklitzke/mysql,springning/mysql,zhgo/mysql,helight/helight_code,methane/mysql,wfxiang08/mysql,Go-SQL-Driver/MySQL,cxflag203/mysql,bookerzzz/mysql,go-sql-driver/mysql,roth1002/mysql,chinanjjohn2012/mysql,henrylee2cn/mysql,joshuaprunier/mysql,tmulchay/mysql,Frca/mysql,segmentio/mysql,helight/helight_code,LightKool/mysql-go,aperera/mysql,helight/helight_code,VividCortex/mysql,hebihui/mysql,beego/mysql,nanata1115/mysql,helight/helight_code,hyperworks/mysql,bookerzzz/mysql,VividCortex/mysql,jockchou/mysql,yyljlyy/mysql,helight/helight_code,rafaeljusto/mysql,netroby/mysql,sunjian1/mysql,helight/helight_code