Data type representing a calendar date and time of day.

Description

The underlying representation of this type is a 64-bit signed integer. The integer indicates the number of time units since the Unix epoch (1970-01-01 00:00:00). The number can be negative to indicate datetimes before the epoch.

Usage

DataType_Datetime(time_unit = "us", time_zone = NULL)

Arguments

`time_unit`	Unit of time. One of `“ms”`, `“us”` (default) or `“ns”`.
`time_zone`	Time zone string, as defined in `OlsonNames()`. Setting `timezone = “\*“` will match any timezone, which can be useful to select all Datetime columns containing a timezone.

Value

Datetime DataType

Examples

library(polars)

pl$Datetime("ns", "Pacific/Samoa")

#> DataType: Datetime(
#>     Nanoseconds,
#>     Some(
#>         "Pacific/Samoa",
#>     ),
#> )

df = pl$DataFrame(
  naive_time = as.POSIXct("1900-01-01"),
  zoned_time = as.POSIXct("1900-01-01", "UTC")
)
df

#> shape: (1, 2)
#> ┌─────────────────────┬─────────────────────────┐
#> │ naive_time          ┆ zoned_time              │
#> │ ---                 ┆ ---                     │
#> │ datetime[ms]        ┆ datetime[ms, UTC]       │
#> ╞═════════════════════╪═════════════════════════╡
#> │ 1900-01-01 00:00:00 ┆ 1900-01-01 00:00:00 UTC │
#> └─────────────────────┴─────────────────────────┘

df$select(pl$col(pl$Datetime("us", "*")))

#> shape: (0, 0)
#> ┌┐
#> ╞╡
#> └┘