import type { DateValue, DecimalValue, IntervalValue, TimeTzValue, TimeValue, TimestampValue } from "./vector";
/** Create a tagged DuckDB DECIMAL value from a scaled decimal literal. */
export declare function decimalValue(value: string | number | bigint, width: number, scale: number): DecimalValue;
/** Create a tagged DuckDB DATE value from days since 1970-01-01. */
export declare function dateValue(days: number): DateValue;
/** Convert a JavaScript Date to a DuckDB DATE value using UTC date fields. */
export declare function dateFromJSDate(value: Date): DateValue;
/** Create a DuckDB DATE value from an ISO `YYYY-MM-DD` string. */
export declare function dateFromISODate(value: string): DateValue;
/** Convert a DuckDB DATE value to a JavaScript Date at UTC midnight. */
export declare function dateValueToJSDate(value: DateValue): Date;
/** Create a tagged DuckDB TIME or TIME_NS value. */
export declare function timeValue(value: bigint | number | string, unit?: "micros" | "nanos"): TimeValue;
/** Create a tagged DuckDB TIME WITH TIME ZONE value from DuckDB's packed bits. */
export declare function timeTzValue(bits: bigint | number | string): TimeTzValue;
/** Create a tagged DuckDB TIMESTAMP value in the specified unit. */
export declare function timestampValue(value: bigint | number | string, unit?: "seconds" | "millis" | "micros" | "nanos", timezone?: "utc"): TimestampValue;
/** Convert a JavaScript Date to a tagged DuckDB TIMESTAMP value. */
export declare function timestampFromJSDate(value: Date, unit?: "seconds" | "millis" | "micros" | "nanos", timezone?: "utc"): TimestampValue;
/** Convert a tagged DuckDB TIMESTAMP value to a JavaScript Date. */
export declare function timestampValueToJSDate(value: TimestampValue): Date;
/** Create a tagged DuckDB INTERVAL value. */
export declare function intervalValue(months?: number, days?: number, micros?: bigint | number | string): IntervalValue;