import { type HasData, type HasSql, internalData } from './Internal.js';
import { type Sql } from './Sql.js';
import type { Field } from './expr/Field.js';
declare class IndexData {
    fields: Array<HasSql>;
    concurrently?: boolean;
    unique?: boolean;
    only?: boolean;
    using?: HasSql;
    order?: 'asc' | 'desc';
    nulls?: 'first' | 'last';
    where?: HasSql;
}
export declare class IndexApi extends IndexData {
    toSql(tableName: string, indexName: string, ifNotExists: boolean): Sql;
}
export declare class Index<TableName extends string = string> implements HasData<IndexData> {
    private brand;
    [internalData]: IndexApi;
    constructor(data: IndexData);
    on<TableName extends string>(...fields: Array<Field<unknown, TableName> | HasSql>): Index<TableName>;
    concurrently(): Index<TableName>;
    only(): Index<TableName>;
    using<Sql>(using: HasSql<Sql>): Index<TableName>;
    asc(): Index<TableName>;
    desc(): Index<TableName>;
    nullsFirst(): Index<TableName>;
    nullsLast(): Index<TableName>;
    where(where: HasSql<boolean>): Index<TableName>;
}
export declare function index(): Index<string>;
export declare function uniqueIndex(): Index<string>;
export {};