reifydb_routine/function/date/
trunc.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, date::Date, r#type::Type};
6
7use crate::routine::{Function, FunctionKind, Routine, RoutineInfo, context::FunctionContext, error::RoutineError};
8
9pub struct DateTrunc {
10	info: RoutineInfo,
11}
12
13impl Default for DateTrunc {
14	fn default() -> Self {
15		Self::new()
16	}
17}
18
19impl DateTrunc {
20	pub fn new() -> Self {
21		Self {
22			info: RoutineInfo::new("date::trunc"),
23		}
24	}
25}
26
27impl<'a> Routine<FunctionContext<'a>> for DateTrunc {
28	fn info(&self) -> &RoutineInfo {
29		&self.info
30	}
31
32	fn return_type(&self, _input_types: &[Type]) -> Type {
33		Type::Date
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 date_col = &args[0];
46		let prec_col = &args[1];
47		let (date_data, date_bitvec) = date_col.unwrap_option();
48		let (prec_data, prec_bitvec) = prec_col.unwrap_option();
49		let row_count = date_data.len();
50
51		let result_data = match (date_data, prec_data) {
52			(
53				ColumnBuffer::Date(date_container),
54				ColumnBuffer::Utf8 {
55					container: prec_container,
56					..
57				},
58			) => {
59				let mut container = TemporalContainer::with_capacity(row_count);
60
61				for i in 0..row_count {
62					match (date_container.get(i), prec_container.is_defined(i)) {
63						(Some(d), true) => {
64							let precision = prec_container.get(i).unwrap();
65							let truncated =
66								match precision {
67									"year" => Date::new(d.year(), 1, 1),
68									"month" => Date::new(d.year(), d.month(), 1),
69									other => {
70										return Err(RoutineError::FunctionExecutionFailed {
71										function: ctx.fragment.clone(),
72										reason: format!("invalid precision: '{}'", other),
73									});
74									}
75								};
76							match truncated {
77								Some(val) => container.push(val),
78								None => container.push_default(),
79							}
80						}
81						_ => container.push_default(),
82					}
83				}
84
85				ColumnBuffer::Date(container)
86			}
87			(ColumnBuffer::Date(_), other) => {
88				return Err(RoutineError::FunctionInvalidArgumentType {
89					function: ctx.fragment.clone(),
90					argument_index: 1,
91					expected: vec![Type::Utf8],
92					actual: other.get_type(),
93				});
94			}
95			(other, _) => {
96				return Err(RoutineError::FunctionInvalidArgumentType {
97					function: ctx.fragment.clone(),
98					argument_index: 0,
99					expected: vec![Type::Date],
100					actual: other.get_type(),
101				});
102			}
103		};
104
105		let final_data = match (date_bitvec, prec_bitvec) {
106			(Some(bv), _) | (_, Some(bv)) => ColumnBuffer::Option {
107				inner: Box::new(result_data),
108				bitvec: bv.clone(),
109			},
110			_ => result_data,
111		};
112
113		Ok(Columns::new(vec![ColumnWithName::new(ctx.fragment.clone(), final_data)]))
114	}
115}
116
117impl Function for DateTrunc {
118	fn kinds(&self) -> &[FunctionKind] {
119		&[FunctionKind::Scalar]
120	}
121}
reifydb_routine/function/date/trunc.rs

reifydb_routine/function/date/
trunc.rs
