reifydb_routine/function/datetime/
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 DateTimeDiff {
10	info: RoutineInfo,
11}
12
13impl Default for DateTimeDiff {
14	fn default() -> Self {
15		Self::new()
16	}
17}
18
19impl DateTimeDiff {
20	pub fn new() -> Self {
21		Self {
22			info: RoutineInfo::new("datetime::diff"),
23		}
24	}
25}
26
27impl<'a> Routine<FunctionContext<'a>> for DateTimeDiff {
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::DateTime(container1), ColumnBuffer::DateTime(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(dt1), Some(dt2)) => {
58							let diff_nanos = dt1.to_nanos() as i64 - dt2.to_nanos() as i64;
59							container.push(Duration::from_nanoseconds(diff_nanos)?);
60						}
61						_ => container.push_default(),
62					}
63				}
64
65				ColumnBuffer::Duration(container)
66			}
67			(ColumnBuffer::DateTime(_), other) => {
68				return Err(RoutineError::FunctionInvalidArgumentType {
69					function: ctx.fragment.clone(),
70					argument_index: 1,
71					expected: vec![Type::DateTime],
72					actual: other.get_type(),
73				});
74			}
75			(other, _) => {
76				return Err(RoutineError::FunctionInvalidArgumentType {
77					function: ctx.fragment.clone(),
78					argument_index: 0,
79					expected: vec![Type::DateTime],
80					actual: other.get_type(),
81				});
82			}
83		};
84
85		let final_data = match (bitvec1, bitvec2) {
86			(Some(bv), _) | (_, Some(bv)) => ColumnBuffer::Option {
87				inner: Box::new(result_data),
88				bitvec: bv.clone(),
89			},
90			_ => result_data,
91		};
92
93		Ok(Columns::new(vec![ColumnWithName::new(ctx.fragment.clone(), final_data)]))
94	}
95}
96
97impl Function for DateTimeDiff {
98	fn kinds(&self) -> &[FunctionKind] {
99		&[FunctionKind::Scalar]
100	}
101}
reifydb_routine/function/datetime/diff.rs

reifydb_routine/function/datetime/
diff.rs
