import type { Client } from 'pg';
/**
 * Fire a pg_notify on the realtime channel for a given schema.table.
 *
 * The channel format matches what emit_change uses:
 *   `realtime:<schema>.<table>`
 *
 * @param client - A pg Client (or PoolClient) to run the NOTIFY on
 * @param schema - The PostgreSQL schema name (e.g. 'public')
 * @param table - The table name (e.g. 'items')
 * @param payload - The NOTIFY payload string
 */
export declare function notify(client: Client, schema: string, table: string, payload: string): Promise<void>;
/**
 * Build a standard DML payload string in the format emit_change uses.
 *
 * @param operation - The DML operation: 'INSERT', 'UPDATE', or 'DELETE'
 * @param rowIds - Array of affected row IDs (UUIDs)
 * @returns Formatted payload string (e.g. "INSERT:uuid1,uuid2")
 */
export declare function buildPayload(operation: 'INSERT' | 'UPDATE' | 'DELETE', rowIds: string[]): string;
/**
 * Build an INVALIDATE (overflow) payload.
 */
export declare function buildInvalidatePayload(): string;
/**
 * Convenience: fire a DML NOTIFY for a table.
 *
 * @param client - A pg Client to run the NOTIFY on
 * @param schema - The PostgreSQL schema name
 * @param table - The table name
 * @param operation - The DML operation
 * @param rowIds - Array of affected row IDs
 */
export declare function notifyChange(client: Client, schema: string, table: string, operation: 'INSERT' | 'UPDATE' | 'DELETE', rowIds: string[]): Promise<void>;
/**
 * Convenience: fire an INVALIDATE NOTIFY for a table.
 */
export declare function notifyInvalidate(client: Client, schema: string, table: string): Promise<void>;