import QueryTable from "../query-table";
import NumberColumn from "./number-column";
import GenericsHelper from "../helpers/generics-helper";
import QueryColumnCondition from "../condition/query-column-condition";
import { ColumnModifier, ColumnName } from "../helpers/internal-types";
declare abstract class QueryColumn<Table extends QueryTable<any, any>, T> {
    protected _table: Table;
    protected _name: ColumnName;
    protected _modifiers: ColumnModifier[];
    protected _$type: GenericsHelper<T>;
    protected _type: string;
    constructor(_table: Table, _name: ColumnName, _modifiers?: ColumnModifier[]);
    abstract count(): NumberColumn<Table>;
    as(alias: string): this;
    isNull(): QueryColumnCondition<Table, T>;
    isNotNull(): QueryColumnCondition<Table, T>;
}
export default QueryColumn;