export interface EntityType<TUnsaved = any, TSaved = any, TIds extends object = any> {
    _saved: TSaved;
    _unsaved: TUnsaved;
    _idKeys: TIds;
    idOf: (rec: TSaved) => TIds;
}
export declare type UnsavedR<T extends {
    _unsaved: any;
}> = T["_unsaved"];
export declare type SavedR<T extends {
    _saved: any;
}> = T["_saved"];
export declare type KeyType<R extends EntityType> = R["_idKeys"];
export interface PgRecordInfo<Unsaved = any, Saved extends Unsaved & IdType = any, IdType extends object = any> extends EntityType<Unsaved, Saved, IdType> {
    tableName: string;
    schemaName: string;
    idKeys: (keyof Saved)[];
}
/**
 * Extract the runtime key name from a recordInfo
 */
export declare function idKeysOf<RI extends PgRecordInfo>(recordInfoWithIdKey: RI): string[];
/**
 * Turns a record type with possibly more fields than "id" into an array
 */
export declare function collectIdValues<RecordT extends PgRecordInfo>(idObj: KeyType<RecordT>, knexRecordType: RecordT): string[];
/**
 *
 * Creates a record descriptor that captures the table name, primary key name,
 * unsaved type, and saved type of a database record type. Assumes "id" as the
 * primary key name
 *
 */
export declare function recordInfo<Unsaved, Saved extends Unsaved & {
    id: any;
}>(schemaName: string, tableName: string): PgRecordInfo<Unsaved, Saved, Pick<Saved, "id">>;
export declare function recordInfo<Type extends {
    id: string;
}>(schemaName: string, tableName: string): PgRecordInfo<Type, Type, Pick<Type, "id">>;
/**
 *
 * Creates a record descriptor that captures the table name, primary key name,
 * unsaved type, and saved type of a database record type.
 *
 */
export declare function recordInfo<Unsaved, Saved extends Unsaved, Id extends keyof Saved>(schemaName: string, tableName: string, idKey: Id[]): PgRecordInfo<Unsaved, Saved, Pick<Saved, Id>>;
/**
 *
 * Creates a record descriptor for records with composite primary keys
 *
 */
export declare function compositeRecordType<TUnsaved, TSaved extends TUnsaved = TUnsaved>(schemaName: string, tableName: string): {
    withCompositeKeys<TKeys extends keyof TSaved>(keys: TKeys[]): PgRecordInfo<TUnsaved, TSaved, Pick<TSaved, TKeys>>;
};