reifydb_function/text/
count.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 TextCount;
14
15impl TextCount {
16	pub fn new() -> Self {
17		Self
18	}
19}
20
21impl ScalarFunction for TextCount {
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 column = columns.get(0).unwrap();
39
40		match &column.data() {
41			ColumnData::Utf8 {
42				container,
43				..
44			} => {
45				let mut result = Vec::with_capacity(row_count);
46				let mut bitvec = Vec::with_capacity(row_count);
47
48				for i in 0..row_count {
49					if container.is_defined(i) {
50						let text = &container[i];
51						result.push(text.chars().count() as i32);
52						bitvec.push(true);
53					} else {
54						result.push(0);
55						bitvec.push(false);
56					}
57				}
58
59				Ok(ColumnData::int4_with_bitvec(result, bitvec))
60			}
61			other => Err(ScalarFunctionError::InvalidArgumentType {
62				function: ctx.fragment.clone(),
63				argument_index: 0,
64				expected: vec![Type::Utf8],
65				actual: other.get_type(),
66			}),
67		}
68	}
69
70	fn return_type(&self, _input_types: &[Type]) -> Type {
71		Type::Int4
72	}
73}
reifydb_function/text/count.rs

reifydb_function/text/
count.rs
