import type { SQL } from 'drizzle-orm/sql/sql';
/**
 * Inline a string as a SQL literal. MotherDuck AI functions read some
 * arguments at bind time and reject bound parameters there.
 */
export declare function constantString(value: string, functionName: string): SQL;
/** DuckDB STRUCT field names are case-insensitive, so `a` and `A` collide. */
export declare function assertUniqueStructKeys(keys: readonly string[], kind: string): void;
export declare function requireNonEmptyString(value: unknown, name: string, functionName: string): string;