reifydb_routine/function/datetime/
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, datetime::DateTime, r#type::Type};
6
7use crate::routine::{Function, FunctionKind, Routine, RoutineInfo, context::FunctionContext, error::RoutineError};
8
9pub struct DateTimeTrunc {
10	info: RoutineInfo,
11}
12
13impl Default for DateTimeTrunc {
14	fn default() -> Self {
15		Self::new()
16	}
17}
18
19impl DateTimeTrunc {
20	pub fn new() -> Self {
21		Self {
22			info: RoutineInfo::new("datetime::trunc"),
23		}
24	}
25}
26
27impl<'a> Routine<FunctionContext<'a>> for DateTimeTrunc {
28	fn info(&self) -> &RoutineInfo {
29		&self.info
30	}
31
32	fn return_type(&self, _input_types: &[Type]) -> Type {
33		Type::DateTime
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 dt_col = &args[0];
46		let prec_col = &args[1];
47		let (dt_data, dt_bitvec) = dt_col.unwrap_option();
48		let (prec_data, prec_bitvec) = prec_col.unwrap_option();
49		let row_count = dt_data.len();
50
51		let result_data = match (dt_data, prec_data) {
52			(
53				ColumnBuffer::DateTime(dt_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 (dt_container.get(i), prec_container.is_defined(i)) {
63						(Some(dt), true) => {
64							let precision = prec_container.get(i).unwrap();
65							let truncated = match precision {
66								"year" => DateTime::new(dt.year(), 1, 1, 0, 0, 0, 0),
67								"month" => DateTime::new(
68									dt.year(),
69									dt.month(),
70									1,
71									0,
72									0,
73									0,
74									0,
75								),
76								"day" => DateTime::new(
77									dt.year(),
78									dt.month(),
79									dt.day(),
80									0,
81									0,
82									0,
83									0,
84								),
85								"hour" => DateTime::new(
86									dt.year(),
87									dt.month(),
88									dt.day(),
89									dt.hour(),
90									0,
91									0,
92									0,
93								),
94								"minute" => DateTime::new(
95									dt.year(),
96									dt.month(),
97									dt.day(),
98									dt.hour(),
99									dt.minute(),
100									0,
101									0,
102								),
103								"second" => DateTime::new(
104									dt.year(),
105									dt.month(),
106									dt.day(),
107									dt.hour(),
108									dt.minute(),
109									dt.second(),
110									0,
111								),
112								other => {
113									return Err(
114										RoutineError::FunctionExecutionFailed {
115											function: ctx.fragment.clone(),
116											reason: format!(
117												"invalid precision: '{}'",
118												other
119											),
120										},
121									);
122								}
123							};
124							match truncated {
125								Some(val) => container.push(val),
126								None => container.push_default(),
127							}
128						}
129						_ => container.push_default(),
130					}
131				}
132
133				ColumnBuffer::DateTime(container)
134			}
135			(ColumnBuffer::DateTime(_), other) => {
136				return Err(RoutineError::FunctionInvalidArgumentType {
137					function: ctx.fragment.clone(),
138					argument_index: 1,
139					expected: vec![Type::Utf8],
140					actual: other.get_type(),
141				});
142			}
143			(other, _) => {
144				return Err(RoutineError::FunctionInvalidArgumentType {
145					function: ctx.fragment.clone(),
146					argument_index: 0,
147					expected: vec![Type::DateTime],
148					actual: other.get_type(),
149				});
150			}
151		};
152
153		let final_data = match (dt_bitvec, prec_bitvec) {
154			(Some(bv), _) | (_, Some(bv)) => ColumnBuffer::Option {
155				inner: Box::new(result_data),
156				bitvec: bv.clone(),
157			},
158			_ => result_data,
159		};
160
161		Ok(Columns::new(vec![ColumnWithName::new(ctx.fragment.clone(), final_data)]))
162	}
163}
164
165impl Function for DateTimeTrunc {
166	fn kinds(&self) -> &[FunctionKind] {
167		&[FunctionKind::Scalar]
168	}
169}
reifydb_routine/function/datetime/trunc.rs

reifydb_routine/function/datetime/
trunc.rs
