import type { FunctionDefinition } from '../../definition_types';
/**
 * Subtracts the `startTimestamp` from the `endTimestamp` and returns the difference in multiples of `unit`.
 * If `startTimestamp` is later than the `endTimestamp`, negative values are returned.
 *
 * @example
 * ROW date1 = TO_DATETIME("2023-12-02T11:00:00.000Z"),
 *     date2 = TO_DATETIME("2023-12-02T11:00:00.001Z")
 * | EVAL dd_ms = DATE_DIFF("microseconds", date1, date2)
 *
 * @example
 * ROW end_23 = TO_DATETIME("2023-12-31T23:59:59.999Z"),
 *   start_24 = TO_DATETIME("2024-01-01T00:00:00.000Z"),
 *     end_24 = TO_DATETIME("2024-12-31T23:59:59.999")
 * | EVAL end23_to_start24 = DATE_DIFF("year", end_23, start_24)
 * | EVAL end23_to_end24   = DATE_DIFF("year", end_23, end_24)
 * | EVAL start_to_end_24  = DATE_DIFF("year", start_24, end_24)
 */
declare const definition: FunctionDefinition;
export default definition;
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