use reifydb_core::value::column::data::ColumnData;
use reifydb_type::value::{container::temporal::TemporalContainer, duration::Duration, r#type::Type};
use crate::function::{
ScalarFunction, ScalarFunctionContext,
error::{ScalarFunctionError, ScalarFunctionResult},
propagate_options,
};
pub struct DurationTrunc;
impl DurationTrunc {
pub fn new() -> Self {
Self
}
}
impl ScalarFunction for DurationTrunc {
fn scalar(&self, ctx: ScalarFunctionContext) -> ScalarFunctionResult<ColumnData> {
if let Some(result) = propagate_options(self, &ctx) {
return result;
}
let columns = ctx.columns;
let row_count = ctx.row_count;
if columns.len() != 2 {
return Err(ScalarFunctionError::ArityMismatch {
function: ctx.fragment.clone(),
expected: 2,
actual: columns.len(),
});
}
let dur_col = columns.get(0).unwrap();
let prec_col = columns.get(1).unwrap();
match (dur_col.data(), prec_col.data()) {
(
ColumnData::Duration(dur_container),
ColumnData::Utf8 {
container: prec_container,
..
},
) => {
let mut container = TemporalContainer::with_capacity(row_count);
for i in 0..row_count {
match (dur_container.get(i), prec_container.is_defined(i)) {
(Some(dur), true) => {
let precision = &prec_container[i];
let months = dur.get_months();
let days = dur.get_days();
let nanos = dur.get_nanos();
let truncated = match precision.as_str() {
"year" => Duration::new((months / 12) * 12, 0, 0)?,
"month" => Duration::new(months, 0, 0)?,
"day" => Duration::new(months, days, 0)?,
"hour" => Duration::new(
months,
days,
(nanos / 3_600_000_000_000) * 3_600_000_000_000,
)?,
"minute" => Duration::new(
months,
days,
(nanos / 60_000_000_000) * 60_000_000_000,
)?,
"second" => Duration::new(
months,
days,
(nanos / 1_000_000_000) * 1_000_000_000,
)?,
"millis" => Duration::new(
months,
days,
(nanos / 1_000_000) * 1_000_000,
)?,
other => {
return Err(
ScalarFunctionError::ExecutionFailed {
function: ctx.fragment.clone(),
reason: format!(
"invalid precision: '{}'",
other
),
},
);
}
};
container.push(truncated);
}
_ => container.push_default(),
}
}
Ok(ColumnData::Duration(container))
}
(ColumnData::Duration(_), other) => Err(ScalarFunctionError::InvalidArgumentType {
function: ctx.fragment.clone(),
argument_index: 1,
expected: vec![Type::Utf8],
actual: other.get_type(),
}),
(other, _) => Err(ScalarFunctionError::InvalidArgumentType {
function: ctx.fragment.clone(),
argument_index: 0,
expected: vec![Type::Duration],
actual: other.get_type(),
}),
}
}
fn return_type(&self, _input_types: &[Type]) -> Type {
Type::Duration
}
}