toSql method
Implementation
@override
String toSql() {
StringBuffer sb = new StringBuffer();
sb.write("UPDATE `${this._tbl.name}` SET ");
sb.writeAll(_assigns.map((a) => a.toSql(this)), " , ");
//
if (_cond != null) {
sb.write(" WHERE (${_cond!.toSql(this)}) ");
}
return sb.toString();
}