reifydb_routine/function/text/
count.rs

1// SPDX-License-Identifier: Apache-2.0
2// Copyright (c) 2025 ReifyDB
3
4use reifydb_core::value::column::{Column, columns::Columns, data::ColumnData};
5use reifydb_type::value::r#type::Type;
6
7use crate::function::{Function, FunctionCapability, FunctionContext, FunctionInfo, error::FunctionError};
8
9pub struct TextCount {
10	info: FunctionInfo,
11}
12
13impl Default for TextCount {
14	fn default() -> Self {
15		Self::new()
16	}
17}
18
19impl TextCount {
20	pub fn new() -> Self {
21		Self {
22			info: FunctionInfo::new("text::count"),
23		}
24	}
25}
26
27impl Function for TextCount {
28	fn info(&self) -> &FunctionInfo {
29		&self.info
30	}
31
32	fn capabilities(&self) -> &[FunctionCapability] {
33		&[FunctionCapability::Scalar]
34	}
35
36	fn return_type(&self, _input_types: &[Type]) -> Type {
37		Type::Int4
38	}
39
40	fn execute(&self, ctx: &FunctionContext, args: &Columns) -> Result<Columns, FunctionError> {
41		if args.len() != 1 {
42			return Err(FunctionError::ArityMismatch {
43				function: ctx.fragment.clone(),
44				expected: 1,
45				actual: args.len(),
46			});
47		}
48
49		let column = &args[0];
50		let (data, bitvec) = column.data().unwrap_option();
51		let row_count = data.len();
52
53		match data {
54			ColumnData::Utf8 {
55				container,
56				..
57			} => {
58				let mut result = Vec::with_capacity(row_count);
59				let mut res_bitvec = Vec::with_capacity(row_count);
60
61				for i in 0..row_count {
62					if container.is_defined(i) {
63						let text = &container[i];
64						result.push(text.chars().count() as i32);
65						res_bitvec.push(true);
66					} else {
67						result.push(0);
68						res_bitvec.push(false);
69					}
70				}
71
72				let result_data = ColumnData::int4_with_bitvec(result, res_bitvec);
73				let final_data = match bitvec {
74					Some(bv) => ColumnData::Option {
75						inner: Box::new(result_data),
76						bitvec: bv.clone(),
77					},
78					None => result_data,
79				};
80				Ok(Columns::new(vec![Column::new(ctx.fragment.clone(), final_data)]))
81			}
82			other => Err(FunctionError::InvalidArgumentType {
83				function: ctx.fragment.clone(),
84				argument_index: 0,
85				expected: vec![Type::Utf8],
86				actual: other.get_type(),
87			}),
88		}
89	}
90}
reifydb_routine/function/text/count.rs

reifydb_routine/function/text/
count.rs
