import type { Client } from 'pg';
export interface IArtifactSummary {
    triggerNames: string[];
    tableNames: string[];
    droppedColumns: Array<{
        tableName: string;
        columnName: string;
    }>;
    totalCount: number;
}
/** Trigger names matching non-destructive renames (`ddp sync` / diff); need table for DROP TRIGGER. */
export declare const collectPreservedTriggerDropRefs: (client: Client, schema: string) => Promise<Array<{
    triggerName: string;
    eventObjectTable: string;
}>>;
export declare const collectPreservedArtifacts: (client: Client, schema: string) => Promise<IArtifactSummary>;
export declare const formatArtifactNoticeLines: (artifacts: IArtifactSummary, schema: string) => string[];
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