import { sql } from 'slonik';
/**
 * Change sort_codes primary key from (key) to (key, owner_id).
 *
 * Previously `key` was the sole PK (integer), which collides across tenants
 * because different businesses legitimately use the same key values. The
 * composite PK makes the uniqueness constraint per-tenant.
 *
 * Only financial_entities still has a sort_code column referencing sort_codes —
 * businesses and tax_categories dropped theirs in 2024-02-26. The FK on
 * financial_entities is dropped and re-added as a composite
 * (sort_code, owner_id) → sort_codes(key, owner_id).
 *
 * Index changes:
 *   - DROP unique index hash_sort_codes_key_uindex (key alone — no longer unique)
 *   - New composite PK btree index replaces the old single-column PK
 *   - KEEP idx_sort_codes_owner_id for lookups by owner
 *   - ADD idx_sort_codes_owner_key on (owner_id, key) for owner-first lookups
 */
declare const _default: {
    name: string;
    run: ({ connection }: {
        sql: typeof sql.unsafe;
        connection: import("slonik").DatabaseTransactionConnection | import("slonik").DatabasePool;
    }) => Promise<void>;
};
export default _default;