reifydb_function/date/
start_of_month.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 DateStartOfMonth;
10
11impl DateStartOfMonth {
12	pub fn new() -> Self {
13		Self
14	}
15}
16
17impl ScalarFunction for DateStartOfMonth {
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() != 1 {
27			return Err(ScalarFunctionError::ArityMismatch {
28				function: ctx.fragment.clone(),
29				expected: 1,
30				actual: columns.len(),
31			});
32		}
33
34		let col = columns.get(0).unwrap();
35
36		match col.data() {
37			ColumnData::Date(container) => {
38				let mut result = TemporalContainer::with_capacity(row_count);
39
40				for i in 0..row_count {
41					if let Some(date) = container.get(i) {
42						match Date::new(date.year(), date.month(), 1) {
43							Some(d) => result.push(d),
44							None => result.push_default(),
45						}
46					} else {
47						result.push_default();
48					}
49				}
50
51				Ok(ColumnData::Date(result))
52			}
53			other => Err(ScalarFunctionError::InvalidArgumentType {
54				function: ctx.fragment.clone(),
55				argument_index: 0,
56				expected: vec![Type::Date],
57				actual: other.get_type(),
58			}),
59		}
60	}
61
62	fn return_type(&self, _input_types: &[Type]) -> Type {
63		Type::Date
64	}
65}
reifydb_function/date/start_of_month.rs

reifydb_function/date/
start_of_month.rs
