reifydb_function/date/
diff.rs

1// SPDX-License-Identifier: AGPL-3.0-or-later
2// Copyright (c) 2025 ReifyDB
3
4use reifydb_core::value::column::data::ColumnData;
5use reifydb_type::value::{container::temporal::TemporalContainer, duration::Duration, r#type::Type};
6
7use crate::{
8	ScalarFunction, ScalarFunctionContext,
9	error::{ScalarFunctionError, ScalarFunctionResult},
10	propagate_options,
11};
12
13pub struct DateDiff;
14
15impl DateDiff {
16	pub fn new() -> Self {
17		Self
18	}
19}
20
21impl ScalarFunction for DateDiff {
22	fn scalar(&self, ctx: ScalarFunctionContext) -> ScalarFunctionResult<ColumnData> {
23		if let Some(result) = propagate_options(self, &ctx) {
24			return result;
25		}
26
27		let columns = ctx.columns;
28		let row_count = ctx.row_count;
29
30		if columns.len() != 2 {
31			return Err(ScalarFunctionError::ArityMismatch {
32				function: ctx.fragment.clone(),
33				expected: 2,
34				actual: columns.len(),
35			});
36		}
37
38		let col1 = columns.get(0).unwrap();
39		let col2 = columns.get(1).unwrap();
40
41		match (col1.data(), col2.data()) {
42			(ColumnData::Date(container1), ColumnData::Date(container2)) => {
43				let mut container = TemporalContainer::with_capacity(row_count);
44
45				for i in 0..row_count {
46					match (container1.get(i), container2.get(i)) {
47						(Some(d1), Some(d2)) => {
48							let diff_days = (d1.to_days_since_epoch()
49								- d2.to_days_since_epoch()) as i64;
50							container.push(Duration::from_days(diff_days));
51						}
52						_ => container.push_default(),
53					}
54				}
55
56				Ok(ColumnData::Duration(container))
57			}
58			(ColumnData::Date(_), other) => Err(ScalarFunctionError::InvalidArgumentType {
59				function: ctx.fragment.clone(),
60				argument_index: 1,
61				expected: vec![Type::Date],
62				actual: other.get_type(),
63			}),
64			(other, _) => Err(ScalarFunctionError::InvalidArgumentType {
65				function: ctx.fragment.clone(),
66				argument_index: 0,
67				expected: vec![Type::Date],
68				actual: other.get_type(),
69			}),
70		}
71	}
72
73	fn return_type(&self, _input_types: &[Type]) -> Type {
74		Type::Duration
75	}
76}
reifydb_function/date/diff.rs

reifydb_function/date/
diff.rs
