import type { DriverSpecs } from './Driver.js';
import { type HasSql, type HasTable, type HasTarget, internalSql } from './Internal.js';
import { type Sql } from './Sql.js';
import type { Table, TableRow } from './Table.js';
import type { Expand } from './Types.js';
import type { Include } from './expr/Include.js';
import type { JoinOp } from './query/Query.js';
declare const nullable: unique symbol;
export interface SelectionRecord extends Record<string, SelectionInput> {
}
export type IsNullable = {
    [nullable]: true;
};
export type MakeNullable<T> = Expand<{
    [K in keyof T]: T[K] & IsNullable;
}>;
export type SelectionInput = HasSql | HasTable | HasTarget | SelectionRecord | Include<unknown>;
export type RowOfRecord<Input> = Expand<{
    [Key in keyof Input as Key extends string ? Key : never]: SelectionRow<Input[Key]>;
}>;
export type SelectionRow<Input> = Input extends HasSql<infer Value> ? Value : Input extends IsNullable ? RowOfRecord<Input> | null : Input extends SelectionRecord ? RowOfRecord<Input> : Input extends Table<infer Definition> ? TableRow<Definition> : never;
export interface MapRowContext {
    values: Array<unknown>;
    index: number;
    specs: DriverSpecs;
}
export declare class Selection implements HasSql {
    #private;
    input: SelectionInput;
    nullable: Set<string>;
    mapRow: (ctx: MapRowContext) => unknown;
    constructor(input: SelectionInput, nullable?: Set<string>);
    makeVirtual<Input>(name: string): Input & HasTarget;
    fieldNames(): Array<string>;
    get [internalSql](): Sql;
    join(right: HasTarget | Sql, operator: JoinOp): Selection;
}
export declare class TableSelection extends Selection {
    table: HasTable;
    constructor(table: HasTable);
    join(right: HasTarget | Sql, operator: JoinOp): Selection;
}
export declare class JoinSelection extends Selection {
    tables: Array<HasTable>;
    constructor(tables: Array<HasTable>, nullable: Set<string>);
    join(right: HasTarget | Sql, operator: JoinOp): Selection;
}
export declare function selection(input: SelectionInput): Selection;
export {};