/** Validate a PostgreSQL identifier (schema/table/column name supplied by the host). */
export declare function validateIdentifier(name: string): void;
/** Double-quote a validated PostgreSQL identifier. */
export declare function quoteIdentifier(name: string): string;
/** Return `schema.table` with both identifiers quoted and validated. */
export declare function qualifyTable(schema: string, table: string): string;
/** Stable 32-bit advisory-lock key derived from the schema name. */
export declare function schemaAdvisoryLockKey(schema: string): number;
/** Namespace constant for `pg_advisory_xact_lock(key1, key2)` migration locks. */
export declare const MIGRATION_LOCK_NAMESPACE = 1886546291;