reifydb_routine/function/date/
start_of_month.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 DateStartOfMonth {
10	info: RoutineInfo,
11}
12
13impl Default for DateStartOfMonth {
14	fn default() -> Self {
15		Self::new()
16	}
17}
18
19impl DateStartOfMonth {
20	pub fn new() -> Self {
21		Self {
22			info: RoutineInfo::new("date::start_of_month"),
23		}
24	}
25}
26
27impl<'a> Routine<FunctionContext<'a>> for DateStartOfMonth {
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() != 1 {
38			return Err(RoutineError::FunctionArityMismatch {
39				function: ctx.fragment.clone(),
40				expected: 1,
41				actual: args.len(),
42			});
43		}
44
45		let column = &args[0];
46		let (data, bitvec) = column.unwrap_option();
47		let row_count = data.len();
48
49		let result_data = match data {
50			ColumnBuffer::Date(container) => {
51				let mut result = TemporalContainer::with_capacity(row_count);
52
53				for i in 0..row_count {
54					if let Some(date) = container.get(i) {
55						match Date::new(date.year(), date.month(), 1) {
56							Some(d) => result.push(d),
57							None => result.push_default(),
58						}
59					} else {
60						result.push_default();
61					}
62				}
63
64				ColumnBuffer::Date(result)
65			}
66			other => {
67				return Err(RoutineError::FunctionInvalidArgumentType {
68					function: ctx.fragment.clone(),
69					argument_index: 0,
70					expected: vec![Type::Date],
71					actual: other.get_type(),
72				});
73			}
74		};
75
76		let final_data = if let Some(bv) = bitvec {
77			ColumnBuffer::Option {
78				inner: Box::new(result_data),
79				bitvec: bv.clone(),
80			}
81		} else {
82			result_data
83		};
84
85		Ok(Columns::new(vec![ColumnWithName::new(ctx.fragment.clone(), final_data)]))
86	}
87}
88
89impl Function for DateStartOfMonth {
90	fn kinds(&self) -> &[FunctionKind] {
91		&[FunctionKind::Scalar]
92	}
93}
reifydb_routine/function/date/start_of_month.rs

reifydb_routine/function/date/
start_of_month.rs
