FQL v4 will be decommissioned on June 30, 2025. Ensure that you complete your migration from FQL v4 to FQL v10 by that date.

Fauna accounts created after August 21, 2024 must use FQL v10. These accounts will not be able to run FQL v4 queries or access the v4 Dashboard.

For more details, see the v4 EOL announcement and migration guide. Contact support@fauna.com with any questions.

ToMicros

This reference topic applies to FQL v4. Go to this page for the latest FQL v10 reference topics.

 
ToMicros( value )
to_micros( value )
ToMicros( value )
ToMicros( value )
ToMicros( value )
ToMicros( value )

Description

The ToMicros function converts a value to the number of microseconds since Unix epoch (midnight, January 1, 1970), if possible.

Attempting to convert a value to a number of microseconds which has no numeric representation results in an "invalid argument" error.

Parameters

Parameter Type Definition and Requirements

value

Any

The value to attempt to convert to a number of microseconds since Unix epoch.

If you provide a Number, it is interpreted as the number of microseconds since Unix epoch.

Returns

A Number representing the number of microseconds since Unix epoch.

Examples

The following query calls ToMicros twice:

  1. To convert 1 second after Unix epoch into microseconds.

  2. To convert the current transaction time into microseconds.

client.query([
  q.ToMicros(q.Epoch(1, 'second')),
  q.ToMicros(q.Time('2020-07-06T12:34:56.789Z')),
])
.then((ret) => console.log(ret))
.catch((err) => console.error(
  'Error: [%s] %s: %s',
  err.name,
  err.message,
  err.errors()[0].description,
))
[ 1000000, 1594038896789000 ]
result = client.query(
  [
    q.to_micros(q.epoch(1, 'second')),
    q.to_micros(q.time('2020-07-06T12:34:56.789Z')),
  ]
)
print(result)
[1000000, 1594038896789000]
result, err := client.Query(
	f.Arr{
		f.ToMicros(f.Epoch(1, "second")),
		f.ToMicros(f.Time("2020-07-06T12:34:56.789Z")),
	})

if err != nil {
	fmt.Fprintln(os.Stderr, err)
} else {
	fmt.Println(result)
}
[1000000 1594038896789000]
try
{
    Value result = await client.Query(
        Arr(
            ToMicros(Epoch(1, "second")),
            ToMicros(Time("2020-07-06T12:34:56.789Z"))
        )
    );

    Console.WriteLine(result);
}
catch (Exception e)
{
    Console.WriteLine($"ERROR: {e.Message}");
}
Arr(LongV(1000000), LongV(1594038896789000))
System.out.println(
    client.query(
        Arr(
            ToMicros(Epoch(1, "second")),
            ToMicros(Time("2020-07-06T12:34:56.789Z"))
        )
    ).get());
[1000000, 1594038896789000]
[
  ToMicros(Epoch(1, 'second')),
  ToMicros(Time('2020-07-06T12:34:56.789Z'))
]
[ 1000000, 1594038896789000 ]
Query metrics:

  •    bytesIn:  93

  •   bytesOut:  39

  • computeOps:   1

  •    readOps:   0

  •   writeOps:   0

  •  readBytes:   0

  • writeBytes:   0

  •  queryTime: 5ms

  •    retries:   0

Is this article helpful? 

Tell Fauna how the article can be improved:
 Visit Fauna's forums or email docs@fauna.com

Thank you for your feedback!