import { QueryHookPlugin, QueryResultContext } from '../index';
/**
 * Options for ResultValidatorPlugin
 */
export interface ResultValidatorOptions {
    /**
     * Threshold for large result set warning (default: 1000 rows)
     */
    largeResultThreshold?: number;
    /**
     * Callback when a query returns no results
     */
    onEmptyResult?: (context: QueryResultContext) => void;
    /**
     * Callback when a query returns a large result set
     */
    onLargeResult?: (context: QueryResultContext) => void;
    /**
     * Table names to monitor for empty results (default: [] - monitors all tables)
     * Provide specific table names to only monitor those tables: ['users', 'orders']
     */
    monitorTables?: string[];
    /**
     * Enable console logging for this plugin (default: false)
     * When true, the plugin will log empty results, large results, and general query results to console
     */
    enableLogging?: boolean;
}
/**
 * Plugin for validating and monitoring query results
 * Detects empty results and large result sets
 *
 * @example
 * ```typescript
 * import { enableQueryHooks, registerPlugin } from 'typeorm-query-hooks';
 * import { ResultValidatorPlugin } from 'typeorm-query-hooks/plugins/result-validator';
 *
 * enableQueryHooks();
 *
 * registerPlugin(ResultValidatorPlugin({
 *   largeResultThreshold: 5000,        // custom threshold (default: 1000)
 *   monitorTables: ['users', 'orders'], // specific tables (default: [] = all)
 *   enableLogging: true,                // log to console (default: false)
 *   onEmptyResult: (context) => {
 *     // Alert if critical queries return nothing
 *     console.warn('Empty result detected', {
 *       sql: context.sql.substring(0, 100),
 *       method: context.methodName
 *     });
 *   },
 *   onLargeResult: (context) => {
 *     // Alert on large result sets (pagination needed)
 *     console.warn(`Large result: ${context.rowCount} rows`);
 *   }
 * }));
 * ```
 */
export declare function ResultValidatorPlugin(options?: ResultValidatorOptions): QueryHookPlugin;
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