export interface SQLQuery {
    type: "sql";
    query: string;
    params?: any[];
}
export interface MongoQuery {
    type: "mongodb";
    collection: string;
    method: string;
    args?: any[];
}
export interface CassandraQuery {
    type: "cassandra";
    query: string;
    params?: any[];
}
export type Query = string | SQLQuery | MongoQuery | CassandraQuery | {
    collection: string;
    method: string;
    args?: any[];
};
/**
 * Executes a query using the connection determined by the tenant context.
 * For PostgreSQL and MySQL, the native connection.query is used.
 * For MongoDB and Cassandra, corresponding helper functions are invoked.
 */
export declare function executeQuery(query: Query, params?: any[]): Promise<any>;