import type { ExprValue } from '../types.js';
/**
 * Given a date/time value, return the milliseconds since the UNIX epoch.
 * @param {ExprValue} expr The date/time expression.
 */
export declare function epoch_ms(expr: ExprValue): import("../index.js").FunctionNode;
/**
 * Perform data binning according to the provided interval unit and steps.
 * @param expr The date/time expression to bin.
 * @param unit The datetime interval unit to bin by.
 * @param steps The number of interval steps.
 */
export declare function dateBin(expr: ExprValue, unit: string, steps?: number): import("../index.js").FunctionNode;
/**
 * Map date/times to a month value, all within the same year for comparison.
 * The resulting value is still date-typed.
 * @param expr The date/time expression.
 */
export declare function dateMonth(expr: ExprValue): import("../index.js").FunctionNode;
/**
 * Map date/times to a month and day value, all within the same year for
 * comparison. The resulting value is still date-typed.
 * @param expr The date/time expression.
 */
export declare function dateMonthDay(expr: ExprValue): import("../index.js").FunctionNode;
/**
 * Map date/times to a day of the month value, all within the same year and month
 * for comparison. The resulting value is still date-typed.
 * @param expr The date/time expression.
 */
export declare function dateDay(expr: ExprValue): import("../index.js").FunctionNode;
/**
 * Convert a timestamp to the specified time zone.
 * See https://duckdb.org/docs/stable/sql/data_types/timezones for
 * supported time zone identifiers.
 * @param tz The time zone identifier string.
 * @param expr The timestamp expression to convert.
 */
export declare function timezone(tz: string, expr: ExprValue): import("../index.js").FunctionNode;
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