修改数据类型关系

修改数据类型关系

类型定义	旧	新
typeMediumInteger	number($length, 0)	int
typeSmall	number($length, 0)	smallint
typeTinyInteger	number($length, 0)	tinyint
typeFloat	number($column->total, $column->places)	typeDouble
typeDouble	number($column->total, $column->places)	double($column->total, $column->places)/double
typeDecimal	number($column->total, $column->places)	decimal($column->total, $column->places)
typeBoolean	char(1)	tinyint(1)