/**
 * Migration Risk Analysis Engine
 *
 * Statically analyzes SQL migrations for Expand-Contract violations, destructive DDL,
 * and lock-heavy operations (e.g. non-concurrent index creation, non-null additions without default).
 */
export type MigrationRiskLevel = "HIGH" | "MEDIUM" | "LOW";
export interface MigrationRiskItem {
    level: MigrationRiskLevel;
    type: string;
    description: string;
    recommendation: string;
    statementSnippet?: string;
    blocksTransactionalPush?: true;
}
export interface MigrationFileRisk {
    file: string;
    overallRisk: MigrationRiskLevel;
    risks: MigrationRiskItem[];
}
export interface MigrationRiskAnalysis {
    overallRisk: MigrationRiskLevel;
    highRiskCount: number;
    mediumRiskCount: number;
    lowRiskCount: number;
    transactionalPushBlockerCount: number;
    files: MigrationFileRisk[];
}
export declare function maskSqlNoise(sql: string): string;
export declare function splitSqlStatements(sql: string): string[];
export declare function analyzeMigrationSql(sql: string): MigrationRiskItem[];
export declare function analyzeMigrationFiles(files: Array<{
    file: string;
    sql: string;
}>): MigrationRiskAnalysis;
export declare function formatMigrationRiskReport(analysis: MigrationRiskAnalysis): string;