reifydb_function/date/
trunc.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, date::Date, r#type::Type};
6
7use crate::{ScalarFunction, ScalarFunctionContext, error::ScalarFunctionError, propagate_options};
8
9pub struct DateTrunc;
10
11impl DateTrunc {
12	pub fn new() -> Self {
13		Self
14	}
15}
16
17impl ScalarFunction for DateTrunc {
18	fn scalar(&self, ctx: ScalarFunctionContext) -> crate::error::ScalarFunctionResult<ColumnData> {
19		if let Some(result) = propagate_options(self, &ctx) {
20			return result;
21		}
22
23		let columns = ctx.columns;
24		let row_count = ctx.row_count;
25
26		if columns.len() != 2 {
27			return Err(ScalarFunctionError::ArityMismatch {
28				function: ctx.fragment.clone(),
29				expected: 2,
30				actual: columns.len(),
31			});
32		}
33
34		let date_col = columns.get(0).unwrap();
35		let prec_col = columns.get(1).unwrap();
36
37		match (date_col.data(), prec_col.data()) {
38			(
39				ColumnData::Date(date_container),
40				ColumnData::Utf8 {
41					container: prec_container,
42					..
43				},
44			) => {
45				let mut container = TemporalContainer::with_capacity(row_count);
46
47				for i in 0..row_count {
48					match (date_container.get(i), prec_container.is_defined(i)) {
49						(Some(d), true) => {
50							let precision = &prec_container[i];
51							let truncated =
52								match precision.as_str() {
53									"year" => Date::new(d.year(), 1, 1),
54									"month" => Date::new(d.year(), d.month(), 1),
55									other => {
56										return Err(ScalarFunctionError::ExecutionFailed {
57										function: ctx.fragment.clone(),
58										reason: format!("invalid precision: '{}'", other),
59									});
60									}
61								};
62							match truncated {
63								Some(val) => container.push(val),
64								None => container.push_default(),
65							}
66						}
67						_ => container.push_default(),
68					}
69				}
70
71				Ok(ColumnData::Date(container))
72			}
73			(ColumnData::Date(_), other) => Err(ScalarFunctionError::InvalidArgumentType {
74				function: ctx.fragment.clone(),
75				argument_index: 1,
76				expected: vec![Type::Utf8],
77				actual: other.get_type(),
78			}),
79			(other, _) => Err(ScalarFunctionError::InvalidArgumentType {
80				function: ctx.fragment.clone(),
81				argument_index: 0,
82				expected: vec![Type::Date],
83				actual: other.get_type(),
84			}),
85		}
86	}
87
88	fn return_type(&self, _input_types: &[Type]) -> Type {
89		Type::Date
90	}
91}
reifydb_function/date/trunc.rs

reifydb_function/date/
trunc.rs
