reifydb_routine/function/date/
diff.rs

1// SPDX-License-Identifier: Apache-2.0
2// Copyright (c) 2025 ReifyDB
3
4use reifydb_core::value::column::{ColumnWithName, buffer::ColumnBuffer, columns::Columns};
5use reifydb_type::value::{container::temporal::TemporalContainer, duration::Duration, r#type::Type};
6
7use crate::routine::{Function, FunctionKind, Routine, RoutineInfo, context::FunctionContext, error::RoutineError};
8
9pub struct DateDiff {
10	info: RoutineInfo,
11}
12
13impl Default for DateDiff {
14	fn default() -> Self {
15		Self::new()
16	}
17}
18
19impl DateDiff {
20	pub fn new() -> Self {
21		Self {
22			info: RoutineInfo::new("date::diff"),
23		}
24	}
25}
26
27impl<'a> Routine<FunctionContext<'a>> for DateDiff {
28	fn info(&self) -> &RoutineInfo {
29		&self.info
30	}
31
32	fn return_type(&self, _input_types: &[Type]) -> Type {
33		Type::Duration
34	}
35
36	fn execute(&self, ctx: &mut FunctionContext<'a>, args: &Columns) -> Result<Columns, RoutineError> {
37		if args.len() != 2 {
38			return Err(RoutineError::FunctionArityMismatch {
39				function: ctx.fragment.clone(),
40				expected: 2,
41				actual: args.len(),
42			});
43		}
44
45		let col1 = &args[0];
46		let col2 = &args[1];
47		let (data1, bitvec1) = col1.unwrap_option();
48		let (data2, bitvec2) = col2.unwrap_option();
49		let row_count = data1.len();
50
51		let result_data = match (data1, data2) {
52			(ColumnBuffer::Date(container1), ColumnBuffer::Date(container2)) => {
53				let mut container = TemporalContainer::with_capacity(row_count);
54
55				for i in 0..row_count {
56					match (container1.get(i), container2.get(i)) {
57						(Some(d1), Some(d2)) => {
58							let diff_days = (d1.to_days_since_epoch()
59								- d2.to_days_since_epoch()) as i64;
60							container.push(Duration::from_days(diff_days)?);
61						}
62						_ => container.push_default(),
63					}
64				}
65
66				ColumnBuffer::Duration(container)
67			}
68			(ColumnBuffer::Date(_), other) => {
69				return Err(RoutineError::FunctionInvalidArgumentType {
70					function: ctx.fragment.clone(),
71					argument_index: 1,
72					expected: vec![Type::Date],
73					actual: other.get_type(),
74				});
75			}
76			(other, _) => {
77				return Err(RoutineError::FunctionInvalidArgumentType {
78					function: ctx.fragment.clone(),
79					argument_index: 0,
80					expected: vec![Type::Date],
81					actual: other.get_type(),
82				});
83			}
84		};
85
86		let final_data = match (bitvec1, bitvec2) {
87			(Some(bv), _) | (_, Some(bv)) => ColumnBuffer::Option {
88				inner: Box::new(result_data),
89				bitvec: bv.clone(),
90			},
91			_ => result_data,
92		};
93
94		Ok(Columns::new(vec![ColumnWithName::new(ctx.fragment.clone(), final_data)]))
95	}
96}
97
98impl Function for DateDiff {
99	fn kinds(&self) -> &[FunctionKind] {
100		&[FunctionKind::Scalar]
101	}
102}
reifydb_routine/function/date/diff.rs

reifydb_routine/function/date/
diff.rs
