import { type HasConstraint, type HasData, internalConstraint, internalData } from './Internal.js';
import { type Sql } from './Sql.js';
import type { Field, FieldData } from './expr/Field.js';
export interface ConstraintData {
    name?: string;
}
export interface UniqueConstraintData extends ConstraintData {
    fields: Array<FieldData>;
    nullsNotDistinct?: boolean;
}
export declare class UniqueConstraint<TableName extends string = string> implements HasData<UniqueConstraintData>, HasConstraint {
    private brand;
    [internalData]: UniqueConstraintData;
    constructor(data: UniqueConstraintData);
    on<TableName extends string>(...columns: Array<Field<unknown, TableName>>): UniqueConstraint<TableName>;
    nullsNotDistinct(): UniqueConstraint<TableName>;
    get [internalConstraint](): Sql;
}
export declare function unique(name?: string): UniqueConstraint;
export interface PrimaryKeyConstraintData extends ConstraintData {
    fields: Array<FieldData>;
}
export declare class PrimaryKeyConstraint<TableName extends string = string> implements HasData<PrimaryKeyConstraintData>, HasConstraint {
    data: PrimaryKeyConstraintData;
    private brand;
    [internalData]: PrimaryKeyConstraintData;
    constructor(data: PrimaryKeyConstraintData);
    get [internalConstraint](): Sql;
}
export declare function primaryKey<TableName extends string = string>(options: {
    name?: string;
    columns: Array<Field<unknown, TableName>>;
}): PrimaryKeyConstraint<TableName>;
export declare function primaryKey<TableName extends string = string>(...fields: Array<Field<unknown, TableName>>): PrimaryKeyConstraint<TableName>;
export interface ForeignKeyConstraintData extends ConstraintData {
    fields: Array<FieldData>;
    references: Array<FieldData>;
}
export declare class ForeignKeyConstraint<TableName extends string = string> implements HasData<ForeignKeyConstraintData>, HasConstraint {
    private brand;
    [internalData]: ForeignKeyConstraintData;
    constructor(data: ForeignKeyConstraintData);
    references<ForeignTable extends string>(...fields: Array<Field<unknown, ForeignTable>>): ForeignKeyConstraint<TableName>;
    get [internalConstraint](): Sql;
}
export declare function foreignKey<TableName extends string = string>(options: {
    name?: string;
    columns: Array<Field<unknown, TableName>>;
}): ForeignKeyConstraint<TableName>;
export declare function foreignKey<TableName extends string = string>(...fields: Array<Field<unknown, TableName>>): ForeignKeyConstraint<TableName>;
export type Constraint = UniqueConstraint | PrimaryKeyConstraint | ForeignKeyConstraint;