import type { MigrationPlan } from './model-types.js';
/**
 * Renders ` ON CLUSTER '<name>'`, or `''` when cluster mode is off. The name is
 * validated at config resolution (`assertValidClusterName`), so it is safe to
 * interpolate. Single-quoted so the `{cluster}` macro form also works.
 */
export declare function onClusterClause(cluster: string | undefined): string;
/**
 * Injects `ON CLUSTER <name>` into every DDL statement of a migration plan (and
 * the rename-suggestion confirmations). No-op when `cluster` is undefined.
 *
 * Done as a post-pass over the already-rendered SQL so the planner and renderers
 * stay cluster-agnostic — `ON CLUSTER` is an execution directive, never part of
 * the schema model or drift comparison.
 */
export declare function applyOnClusterToPlan(plan: MigrationPlan, cluster: string | undefined): MigrationPlan;
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