import type { FunctionDefinition } from '../../definition_types';
/**
 * Returns a substring of a string, specified by a start position and an optional length.
 *
 * @example
 * FROM employees
 * | KEEP last_name
 * | EVAL ln_sub = SUBSTRING(last_name, 1, 3)
 *
 * @example
 * FROM employees
 * | KEEP last_name
 * | EVAL ln_sub = SUBSTRING(last_name, -3, 3)
 *
 * @example
 * FROM employees
 * | KEEP last_name
 * | EVAL ln_sub = SUBSTRING(last_name, 2)
 */
declare const definition: FunctionDefinition;
export default definition;
//# sourceMappingURL=substring.d.ts.map