private Table LoadFromSchema() { // todo 判断是否存在表,表不存在时返回null List <IColumn> cols = QuerySession.ExecuteSqlString(QuerySession.DatabaseInfo.SqlDialect.SchemaSql, new PropertyEqualColumnMapper <Column>(), tableName).Cast <IColumn>().ToList(); if (cols.Count == 0) { return(null); } var table = new Table(cols); table.TableName = tableName; return(table); }