postgres-interval

Parse Postgres interval columns

Install

npm install --save postgres-interval

Usage

var parse = require('postgres-interval')
var interval = parse('01:02:03')
// => { hours: 1, minutes: 2, seconds: 3 }
interval.toPostgres()
// 1 hour 2 minutes 3 seconds
interval.toISOString()
// P0Y0M0DT1H2M3S
interval.toISOStringShort()
// PT1H2M3S

This package parses the default Postgres interval style. If you have changed intervalstyle, you will need to set it back to the default:

set intervalstyle to default;

API

parse(pgInterval) -> interval

pgInterval

Required
Type: string

A Postgres interval string.

This package is focused on parsing Postgres outputs. It optimizes for performance by assuming that inputs follow the default interval format. It does not perform any validation on the input. If any interval field is not found, its value will be set to 0 in the returned interval.

interval.toPostgres() -> string

Returns an interval string. This allows the interval object to be passed into prepared statements.

interval.toISOString() -> string

Returns an ISO 8601 compliant string, for example P0Y0M0DT0H9M0S.

Also available as interval.toISO() for backwards compatibility.

interval.toISOStringShort() -> string

Returns an ISO 8601 compliant string shortened to minimum length, for example PT9M.

interval.toTemporalDuration() -> Temporal.Duration

Returns a Temporal.Duration representing the interval.

Requires globalThis.Temporal. It ships unflagged in Node 26+. On older runtimes, install a polyfill such as @js-temporal/polyfill and assign it to globalThis.Temporal. The method throws if Temporal is unavailable.

Postgres mixed-sign intervals (e.g. 1 mon -1 days) throw a RangeError. Temporal.Duration requires all fields to share a single sign, which these intervals violate.

The Temporal types are not yet in the default TypeScript lib. To resolve the return type, your project needs Temporal lib types: the TypeScript lib once available, or the @js-temporal/polyfill types. This package adds no type dependency.

License

MIT © Ben Drucker