general_date_trunc_array_fine_granularity

datafusion_functions::datetime::date_trunc

Function general_date_trunc_array_fine_granularity 

Source 
fn general_date_trunc_array_fine_granularity<T: ArrowTimestampType>(
    tu: TimeUnit,
    array: &PrimitiveArray<T>,
    granularity: DateTruncGranularity,
) -> Result<ArrayRef>
Expand description

Fast path for fine granularities (hour and smaller) that can be handled with simple arithmetic operations without calendar complexity.

This function is timezone-agnostic and should only be used when:

  • No timezone is specified in the input, OR
  • The granularity is less than hour as hour can be affected by DST transitions in some cases