use reifydb_core::value::column::{Column, columns::Columns, data::ColumnData};
use reifydb_type::value::{container::temporal::TemporalContainer, duration::Duration, r#type::Type};
use crate::function::{Function, FunctionCapability, FunctionContext, FunctionInfo, error::FunctionError};
pub struct DurationTrunc {
info: FunctionInfo,
}
impl Default for DurationTrunc {
fn default() -> Self {
Self::new()
}
}
impl DurationTrunc {
pub fn new() -> Self {
Self {
info: FunctionInfo::new("duration::trunc"),
}
}
}
impl Function for DurationTrunc {
fn info(&self) -> &FunctionInfo {
&self.info
}
fn capabilities(&self) -> &[FunctionCapability] {
&[FunctionCapability::Scalar]
}
fn return_type(&self, _input_types: &[Type]) -> Type {
Type::Duration
}
fn execute(&self, ctx: &FunctionContext, args: &Columns) -> Result<Columns, FunctionError> {
if args.len() != 2 {
return Err(FunctionError::ArityMismatch {
function: ctx.fragment.clone(),
expected: 2,
actual: args.len(),
});
}
let dur_col = &args[0];
let prec_col = &args[1];
let (dur_data, dur_bv) = dur_col.data().unwrap_option();
let (prec_data, _) = prec_col.data().unwrap_option();
match (dur_data, prec_data) {
(
ColumnData::Duration(dur_container),
ColumnData::Utf8 {
container: prec_container,
..
},
) => {
let row_count = dur_data.len();
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(FunctionError::ExecutionFailed {
function: ctx.fragment.clone(),
reason: format!(
"invalid precision: '{}'",
other
),
});
}
};
container.push(truncated);
}
_ => container.push_default(),
}
}
let mut result_data = ColumnData::Duration(container);
if let Some(bv) = dur_bv {
result_data = ColumnData::Option {
inner: Box::new(result_data),
bitvec: bv.clone(),
};
}
Ok(Columns::new(vec![Column::new(ctx.fragment.clone(), result_data)]))
}
(ColumnData::Duration(_), other) => Err(FunctionError::InvalidArgumentType {
function: ctx.fragment.clone(),
argument_index: 1,
expected: vec![Type::Utf8],
actual: other.get_type(),
}),
(other, _) => Err(FunctionError::InvalidArgumentType {
function: ctx.fragment.clone(),
argument_index: 0,
expected: vec![Type::Duration],
actual: other.get_type(),
}),
}
}
}