res,err:=db.Query(fmt.Sprintf("show full columns from `%s`.`%s`",Escape(db.Database,false),Escape(tableName,false)))
iferr!=nil{
res,err=db.Query(fmt.Sprintf("SELECT `COLUMN_NAME` AS `Field`, `DATA_TYPE` AS `Type`, `COLLATION_NAME` AS `Collation`, `IS_NULLABLE` AS `Null`, `COLUMN_KEY` AS `Key`, "+
"`COLUMN_DEFAULT` AS `Default`, `EXTRA` AS `Extra`, `Privileges` AS `Privileges`, `COLUMN_COMMENT` AS `Comment` "+
"FROM information_schema.COLUMNS WHERE TABLE_SCHEMA = '%s' AND TABLE_NAME = '%s'",