/**
 * Durable resume-at anchor map (E18) — SINGLE-FILE DUAL-DIALECT ([ref] A12 收编). The service-owned
 * eventId→entryId translation: the shell holds the live E2 `eventId` (core never persists it); core's
 * `TaskSpec.resumeAt` takes a persisted `SessionTreeEntry.id`. Keyed (session_id, event_id) so `resolve`
 * is a PK point-lookup. `owner` is the single-DB-fleet null-safe defense-in-depth guard, the data-layer
 * twin of the route's session-owner gate. GC'd with the session (E21 delete). The historical
 * `TiDBResumeAnchorStore` / `PgResumeAnchorStore` class names survive as thin ctor subclasses so every
 * consumer (store-backend.ts, the resume-anchor integration suite) is untouched.
 *
 * ── Dialect deltas, kept EXPLICIT (no genuinely-divergent algorithm in this pair — every method is
 *    SQL-text-only) ──────────────────────────────────────────────────────────────────────────────────
 *   - `?` placeholders vs `$n`
 *   - `ON DUPLICATE KEY UPDATE … VALUES(col)` vs `ON CONFLICT (session_id, event_id) DO UPDATE SET …
 *     EXCLUDED.col`
 *   - null-safe owner compare: `<=>` vs `IS NOT DISTINCT FROM`
 *   - affectedRows vs rowCount (via SqlDriver)
 */
import type { Pool as MySqlPool } from "mysql2/promise";
import type { Pool as PgPool } from "pg";
import { type SqlDriver } from "./sql-driver.js";
/** Dual-dialect durable resume-at anchor map. See the file header for the dialect-delta ledger. */
export declare class SqlResumeAnchorStore {
    protected readonly db: SqlDriver;
    constructor(db: SqlDriver);
    /** Pick the dialect's SQL text. Both statements stay written out at the call site ON PURPOSE. */
    private q;
    /** Record/overwrite the anchor for one settled message boundary (idempotent upsert on the (session_id,event_id) PK). */
    put(sessionId: string, eventId: string, entryId: string, owner: string | null): Promise<void>;
    /** Resolve a shell-supplied eventId → the persisted SessionTreeEntry.id; undefined = unknown anchor. */
    resolve(sessionId: string, eventId: string, owner: string | null): Promise<string | undefined>;
    /** 2c session-sync: ALL anchors for a session (every eventId→entryId + its owner), UNFILTERED — a cross-backend
     *  session EXPORT bundles the whole anchor map so the importer can RE-KEY owner to the target principal (§9). The
     *  route already proved session ownership (the export gate), so no per-row owner filter here. owner carried verbatim. */
    listBySession(sessionId: string): Promise<Array<{
        eventId: string;
        entryId: string;
        owner: string | null;
    }>>;
    /** E21 — purge ALL anchors for a session, scoped by session_id ALONE (the route proved ownership; a per-row owner
     *  guard would orphan rows whose per-run principal diverged from the session owner). Idempotent (affected count). */
    deleteBySession(sessionId: string): Promise<number>;
}
/** MySQL-protocol (TiDB) binding — historical class name + ctor shape preserved. */
export declare class TiDBResumeAnchorStore extends SqlResumeAnchorStore {
    constructor(pool: MySqlPool);
}
/** PostgreSQL binding — historical class name + ctor shape preserved. */
export declare class PgResumeAnchorStore extends SqlResumeAnchorStore {
    constructor(pool: PgPool);
}
//# sourceMappingURL=resume-anchor-store-sql.d.ts.map