reifydb_function/date/
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::r#type::Type;
6
7use crate::{
8	ScalarFunction, ScalarFunctionContext,
9	error::{ScalarFunctionError, ScalarFunctionResult},
10	propagate_options,
11};
12
13pub struct DateMonth;
14
15impl DateMonth {
16	pub fn new() -> Self {
17		Self
18	}
19}
20
21impl ScalarFunction for DateMonth {
22	fn scalar(&self, ctx: ScalarFunctionContext) -> ScalarFunctionResult<ColumnData> {
23		if let Some(result) = propagate_options(self, &ctx) {
24			return result;
25		}
26
27		let columns = ctx.columns;
28		let row_count = ctx.row_count;
29
30		if columns.len() != 1 {
31			return Err(ScalarFunctionError::ArityMismatch {
32				function: ctx.fragment.clone(),
33				expected: 1,
34				actual: columns.len(),
35			});
36		}
37
38		let col = columns.get(0).unwrap();
39
40		match col.data() {
41			ColumnData::Date(container) => {
42				let mut data = Vec::with_capacity(row_count);
43				let mut bitvec = Vec::with_capacity(row_count);
44
45				for i in 0..row_count {
46					if let Some(date) = container.get(i) {
47						data.push(date.month() as i32);
48						bitvec.push(true);
49					} else {
50						data.push(0);
51						bitvec.push(false);
52					}
53				}
54
55				Ok(ColumnData::int4_with_bitvec(data, bitvec))
56			}
57			other => Err(ScalarFunctionError::InvalidArgumentType {
58				function: ctx.fragment.clone(),
59				argument_index: 0,
60				expected: vec![Type::Date],
61				actual: other.get_type(),
62			}),
63		}
64	}
65
66	fn return_type(&self, _input_types: &[Type]) -> Type {
67		Type::Int4
68	}
69}
reifydb_function/date/month.rs

reifydb_function/date/
month.rs
