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feat(connect): add temporal functions #3799
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Feb 12, 2025
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| use daft_core::datatypes::TimeUnit; | ||
| use daft_functions::temporal::{Day, DayOfWeek, Hour, Minute, Month, Second, Year}; | ||
| use daft_schema::dtype::DataType; | ||
|
|
||
| use super::{FunctionModule, UnaryFunction, TODO_FUNCTION}; | ||
|
|
||
| /// https://spark.apache.org/docs/latest/api/python/reference/pyspark.sql/functions.html#datetime-functions | ||
| pub struct DatetimeFunctions; | ||
|
|
||
| impl FunctionModule for DatetimeFunctions { | ||
| fn register(parent: &mut super::SparkFunctions) { | ||
| parent.add_fn("add_months", TODO_FUNCTION); | ||
| parent.add_fn("convert_timezone", TODO_FUNCTION); | ||
| parent.add_fn("curdate", TODO_FUNCTION); | ||
| parent.add_fn("current_date", TODO_FUNCTION); | ||
| parent.add_fn("current_timestamp", TODO_FUNCTION); | ||
| parent.add_fn("current_timezone", TODO_FUNCTION); | ||
| parent.add_fn("date_add", TODO_FUNCTION); | ||
| parent.add_fn("date_diff", TODO_FUNCTION); | ||
| parent.add_fn("date_format", TODO_FUNCTION); | ||
| parent.add_fn("date_from_unix_date", TODO_FUNCTION); | ||
| parent.add_fn("date_part", TODO_FUNCTION); | ||
| parent.add_fn("date_sub", TODO_FUNCTION); | ||
| parent.add_fn("date_trunc", TODO_FUNCTION); | ||
| parent.add_fn("dateadd", TODO_FUNCTION); | ||
| parent.add_fn("datediff", TODO_FUNCTION); | ||
| parent.add_fn("datepart", TODO_FUNCTION); | ||
| parent.add_fn("day", Day); | ||
| parent.add_fn("dayofmonth", TODO_FUNCTION); | ||
| parent.add_fn("dayofweek", DayOfWeek); | ||
| parent.add_fn("dayofyear", TODO_FUNCTION); | ||
| parent.add_fn("extract", TODO_FUNCTION); | ||
| parent.add_fn("from_unixtime", TODO_FUNCTION); | ||
| parent.add_fn("from_utc_timestamp", TODO_FUNCTION); | ||
| parent.add_fn("hour", Hour); | ||
| parent.add_fn("last_day", TODO_FUNCTION); | ||
| parent.add_fn("localtimestamp", TODO_FUNCTION); | ||
| parent.add_fn("make_date", TODO_FUNCTION); | ||
| parent.add_fn("make_dt_interval", TODO_FUNCTION); | ||
| parent.add_fn("make_interval", TODO_FUNCTION); | ||
| parent.add_fn("make_timestamp", TODO_FUNCTION); | ||
| parent.add_fn("make_timestamp_ltz", TODO_FUNCTION); | ||
| parent.add_fn("make_timestamp_ntz", TODO_FUNCTION); | ||
| parent.add_fn("make_ym_interval", TODO_FUNCTION); | ||
| parent.add_fn("minute", Minute); | ||
| parent.add_fn("month", Month); | ||
| parent.add_fn("months_between", TODO_FUNCTION); | ||
| parent.add_fn("next_day", TODO_FUNCTION); | ||
| parent.add_fn("now", TODO_FUNCTION); | ||
| parent.add_fn("quarter", TODO_FUNCTION); | ||
| parent.add_fn("second", Second); | ||
| parent.add_fn("session_window", TODO_FUNCTION); | ||
| parent.add_fn("timestamp_micros", TODO_FUNCTION); | ||
| parent.add_fn("timestamp_millis", TODO_FUNCTION); | ||
| parent.add_fn("timestamp_seconds", TODO_FUNCTION); | ||
| parent.add_fn("to_date", UnaryFunction(|arg| arg.cast(&DataType::Date))); | ||
| parent.add_fn( | ||
| "to_timestamp", | ||
| UnaryFunction(|arg| arg.cast(&DataType::Timestamp(TimeUnit::Milliseconds, None))), | ||
| ); | ||
| parent.add_fn("to_timestamp_ltz", TODO_FUNCTION); | ||
| parent.add_fn("to_timestamp_ntz", TODO_FUNCTION); | ||
| parent.add_fn("to_unix_timestamp", TODO_FUNCTION); | ||
| parent.add_fn("to_utc_timestamp", TODO_FUNCTION); | ||
| parent.add_fn("trunc", TODO_FUNCTION); | ||
| parent.add_fn("try_to_timestamp", TODO_FUNCTION); | ||
| parent.add_fn("unix_date", TODO_FUNCTION); | ||
| parent.add_fn("unix_micros", TODO_FUNCTION); | ||
| parent.add_fn("unix_millis", TODO_FUNCTION); | ||
| parent.add_fn("unix_seconds", TODO_FUNCTION); | ||
| parent.add_fn("unix_timestamp", TODO_FUNCTION); | ||
| parent.add_fn("weekday", TODO_FUNCTION); | ||
| parent.add_fn("weekofyear", TODO_FUNCTION); | ||
| parent.add_fn("window", TODO_FUNCTION); | ||
| parent.add_fn("window_time", TODO_FUNCTION); | ||
| parent.add_fn("year", Year); | ||
| } | ||
| } | ||
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I'm curious if the semantics of our cast are actually the same, cast rules are rightfully prescriptive but we/spark could do anything with a
to_typefunction. No need to update here – am mostly curious if these accurate.There was a problem hiding this comment.
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yeah, I'm not entirely sure if this is correct (according to spark). AFAIK, most
to_timestampmethods usemillisecondsas the default, and i couldn't find anything in the spark docs saying otherwise