postgrejs
Version:
Professional PostgreSQL client NodeJS
87 lines (86 loc) • 3.05 kB
JavaScript
import { DataTypeOIDs } from '../constants.js';
import { parseDateTime } from '../util/parse-datetime.js';
const timeShift = 946684800000;
const timeMul = 4294967296;
export const TimestampType = {
name: 'timestamp',
oid: DataTypeOIDs.timestamp,
jsType: 'Date',
parseBinary(v, options) {
const fetchAsString = options.fetchAsString &&
options.fetchAsString.includes(DataTypeOIDs.timestamp);
const hi = v.readInt32BE();
const lo = v.readUInt32BE(4);
if (lo === 0xffffffff && hi === 0x7fffffff)
return fetchAsString ? 'infinity' : Infinity;
if (lo === 0x00000000 && hi === -0x80000000)
return fetchAsString ? '-infinity' : -Infinity;
// Shift from 2000 to 1970
let d = new Date((lo + hi * timeMul) / 1000 + timeShift);
if (fetchAsString || !options.utcDates) {
d = new Date(d.getUTCFullYear(), d.getUTCMonth(), d.getUTCDate(), d.getUTCHours(), d.getUTCMinutes(), d.getUTCSeconds(), d.getUTCMilliseconds());
}
return fetchAsString ? dateToTimestampString(d) : d;
},
encodeBinary(buf, v, options) {
if (typeof v === 'string')
v = parseDateTime(v, true, false, options.utcDates);
if (v === Infinity) {
buf.writeInt32BE(0x7fffffff); // hi
buf.writeUInt32BE(0xffffffff); // lo
return;
}
if (v === -Infinity) {
buf.writeInt32BE(-0x80000000); // hi
buf.writeUInt32BE(0x00000000); // lo
return;
}
if (!(v instanceof Date))
v = new Date(v);
// Postgresql ignores timezone data so we are
let n = options.utcDates
? v.getTime()
: v.getTime() - v.getTimezoneOffset() * 60 * 1000;
n = (n - timeShift) * 1000;
const hi = Math.floor(n / timeMul);
const lo = n - hi * timeMul;
buf.writeInt32BE(hi);
buf.writeUInt32BE(lo);
},
parseText(v, options) {
if (options.fetchAsString &&
options.fetchAsString.includes(DataTypeOIDs.timestamp))
return v;
return parseDateTime(v, true, false, options.utcDates);
},
isType(v) {
return (v instanceof Date &&
!(v.getFullYear() === 1970 && v.getMonth() === 0 && v.getDate() === 1) &&
!(v.getHours() === 0 &&
v.getMinutes() === 0 &&
v.getSeconds() === 0 &&
v.getMilliseconds() === 0));
},
};
function padZero(v) {
return v < 9 ? '0' + v : '' + v;
}
function dateToTimestampString(d) {
return (d.getFullYear() +
'-' +
padZero(d.getMonth() + 1) +
'-' +
padZero(d.getDate()) +
' ' +
padZero(d.getHours()) +
':' +
padZero(d.getMinutes()) +
':' +
padZero(d.getSeconds()));
}
export const ArrayTimestampType = {
...TimestampType,
name: '_timestamp',
oid: DataTypeOIDs._timestamp,
elementsOID: DataTypeOIDs.timestamp,
};