/**
 * DB adapter for MCP.
 * - `connectPglite()` returns a PGlite-backed client.
 * - `connectPostgres()` returns a `pg.Pool`-backed client.
 * - `createMcpDbClient()` selects adapter based on `persistenceDriver` config.
 *
 * Schema is the caller's responsibility — these factories do NOT bootstrap any
 * tables. Apply drizzle-kit migrations (`pnpm --filter @revealui/db db:migrate`
 * or the PGlite equivalent) before issuing queries.
 */
import type { McpDocumentOperationsInsert, McpDocumentOperationsRow } from '@revealui/contracts';
export interface QueryResult<T = Record<string, unknown>> {
    rows: T[];
    affectedRows?: number;
}
export type McpDbClient = {
    query: <T = Record<string, unknown>>(sql: string, params?: unknown[]) => Promise<QueryResult<T>>;
    close: () => Promise<void>;
};
/**
 * Re-export the Drizzle-generated types for MCP's document-operations log so
 * consumers of `@revealui/mcp` don't have to also import `@revealui/contracts`
 * just to type a `mcp_document_operations` row. These types ARE the source of
 * truth — they are generated from the Drizzle schema at
 * `packages/db/src/schema/mcp-document-operations.ts` and will track any
 * future column changes automatically.
 */
export type { McpDocumentOperationsInsert, McpDocumentOperationsRow };
/**
 * Connect to PGlite (embedded PostgreSQL) for local development/testing.
 * Uses dynamic import to avoid bundling @electric-sql/pglite when not needed.
 *
 * @param options - Optional connection options
 * @param options.dataDir - Override the default data directory. Use ':memory:' for in-memory.
 */
export declare function connectPglite(options?: {
    dataDir?: string;
}): Promise<McpDbClient>;
/**
 * Connect to PostgreSQL for production use.
 * Supports Neon, Supabase, and generic PostgreSQL with SSL.
 */
export declare function connectPostgres(): Promise<McpDbClient>;
/**
 * Factory function that creates an MCP database client based on configuration.
 * Reads `persistenceDriver` from getMcpConfig() to determine which adapter to use.
 */
export declare function createMcpDbClient(): Promise<McpDbClient>;
declare const _default: {
    connectPglite: typeof connectPglite;
    connectPostgres: typeof connectPostgres;
    createMcpDbClient: typeof createMcpDbClient;
};
export default _default;
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