/**
 * Database existence checks and optional CREATE DATABASE (user-guided).
 */
import type { IDatabaseConnection } from '../../types/database';
/**
 * Ensure a PostgreSQL schema exists (e.g. from DB_SCHEMA in .env).
 * `ddp init` only creates filesystem layout — it does not create PG schemas.
 */
export declare const ensurePgSchemaExists: (client: {
    query: (sql: string) => Promise<unknown>;
}, schema: string) => Promise<void>;
export declare const databaseExists: (config: IDatabaseConnection) => Promise<boolean>;
export declare const createDatabaseFromConfig: (config: IDatabaseConnection) => Promise<void>;
export interface IEnsureDatabaseOptions {
    nonInteractive?: boolean;
    createDatabase?: boolean;
}
/**
 * If the target database is missing, optionally create it or prompt (TTY).
 * Returns false if the caller should abort (user declined or missing flags).
 */
export declare const ensureTargetDatabase: (config: IDatabaseConnection, options: IEnsureDatabaseOptions) => Promise<boolean>;
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