/**
 * sql-normalizer (v3.1)
 *
 * Strip literals from SQL to produce a stable template that hashes the same
 * for "the same query" with different parameters. Used by PlanHistory to
 * group EXPLAIN snapshots across versions of the same logical query.
 *
 * Examples:
 *   SELECT * FROM users WHERE id = 5
 *     → SELECT * FROM users WHERE id = ?
 *   SELECT a, b FROM t WHERE a IN (1, 2, 3)
 *     → SELECT a, b FROM t WHERE a IN (?, ?, ?)
 *
 * Conservative: only replaces literals we can identify with high confidence.
 */
export interface NormalizedSql {
    template: string;
    hash: string;
}
export declare class SqlNormalizer {
    /** Normalize and hash SQL. */
    static normalize(sql: string): NormalizedSql;
    /** Just the hash. */
    static hash(sql: string): string;
}
//# sourceMappingURL=sql-normalizer.d.ts.map