import type { WaveletConfig } from '@risingwave/wavelet';
export interface DdlAction {
    type: 'create' | 'update' | 'delete' | 'unchanged';
    resource: 'event' | 'source' | 'query' | 'subscription';
    name: string;
    detail?: string;
}
export declare class DdlManager {
    private connectionString;
    private client;
    constructor(connectionString: string);
    connect(): Promise<void>;
    close(): Promise<void>;
    /**
     * Sync all events, queries, and subscriptions to match the config.
     * Returns a list of actions taken.
     * Idempotent - safe to call multiple times.
     */
    sync(config: WaveletConfig): Promise<DdlAction[]>;
    private getExistingTables;
    private getExistingMaterializedViews;
    private getExistingSources;
    private getExistingSubscriptions;
    private tableHasDependentMVs;
    private createTable;
    private dropTable;
    private createMaterializedView;
    private dropMaterializedView;
    private createSubscription;
    private dropSubscription;
    private createCdcSource;
}
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