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refactor: extract implicit conversion helper functions of vector type (…
…#5118) refactor: extract implicit conversion helper functions of vector Signed-off-by: Zhenchi <zhongzc_arch@outlook.com>
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@@ -14,6 +14,7 @@ | |
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| mod convert; | ||
| mod distance; | ||
| pub(crate) mod impl_conv; | ||
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| use std::sync::Arc; | ||
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| @@ -0,0 +1,156 @@ | ||
| // Copyright 2023 Greptime Team | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| use std::borrow::Cow; | ||
| use std::sync::Arc; | ||
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| use common_query::error::{InvalidFuncArgsSnafu, Result}; | ||
| use datatypes::prelude::ConcreteDataType; | ||
| use datatypes::value::ValueRef; | ||
| use datatypes::vectors::Vector; | ||
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| /// Convert a constant string or binary literal to a vector literal. | ||
| pub fn as_veclit_if_const(arg: &Arc<dyn Vector>) -> Result<Option<Cow<'_, [f32]>>> { | ||
| if !arg.is_const() { | ||
| return Ok(None); | ||
| } | ||
| if arg.data_type() != ConcreteDataType::string_datatype() | ||
| && arg.data_type() != ConcreteDataType::binary_datatype() | ||
| { | ||
| return Ok(None); | ||
| } | ||
| as_veclit(arg.get_ref(0)) | ||
| } | ||
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| /// Convert a string or binary literal to a vector literal. | ||
| pub fn as_veclit(arg: ValueRef<'_>) -> Result<Option<Cow<'_, [f32]>>> { | ||
| match arg.data_type() { | ||
| ConcreteDataType::Binary(_) => arg | ||
| .as_binary() | ||
| .unwrap() // Safe: checked if it is a binary | ||
| .map(binlit_as_veclit) | ||
| .transpose(), | ||
| ConcreteDataType::String(_) => arg | ||
| .as_string() | ||
| .unwrap() // Safe: checked if it is a string | ||
| .map(|s| Ok(Cow::Owned(parse_veclit_from_strlit(s)?))) | ||
| .transpose(), | ||
| ConcreteDataType::Null(_) => Ok(None), | ||
| _ => InvalidFuncArgsSnafu { | ||
| err_msg: format!("Unsupported data type: {:?}", arg.data_type()), | ||
| } | ||
| .fail(), | ||
| } | ||
| } | ||
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| /// Convert a u8 slice to a vector literal. | ||
| pub fn binlit_as_veclit(bytes: &[u8]) -> Result<Cow<'_, [f32]>> { | ||
| if bytes.len() % std::mem::size_of::<f32>() != 0 { | ||
| return InvalidFuncArgsSnafu { | ||
| err_msg: format!("Invalid binary length of vector: {}", bytes.len()), | ||
| } | ||
| .fail(); | ||
| } | ||
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| if cfg!(target_endian = "little") { | ||
| Ok(unsafe { | ||
| let vec = std::slice::from_raw_parts( | ||
| bytes.as_ptr() as *const f32, | ||
| bytes.len() / std::mem::size_of::<f32>(), | ||
| ); | ||
| Cow::Borrowed(vec) | ||
| }) | ||
| } else { | ||
| let v = bytes | ||
| .chunks_exact(std::mem::size_of::<f32>()) | ||
| .map(|chunk| f32::from_le_bytes(chunk.try_into().unwrap())) | ||
| .collect::<Vec<f32>>(); | ||
| Ok(Cow::Owned(v)) | ||
| } | ||
| } | ||
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| /// Parse a string literal to a vector literal. | ||
| /// Valid inputs are strings like "[1.0, 2.0, 3.0]". | ||
| pub fn parse_veclit_from_strlit(s: &str) -> Result<Vec<f32>> { | ||
| let trimmed = s.trim(); | ||
| if !trimmed.starts_with('[') || !trimmed.ends_with(']') { | ||
| return InvalidFuncArgsSnafu { | ||
| err_msg: format!( | ||
| "Failed to parse {s} to Vector value: not properly enclosed in brackets" | ||
| ), | ||
| } | ||
| .fail(); | ||
| } | ||
| let content = trimmed[1..trimmed.len() - 1].trim(); | ||
| if content.is_empty() { | ||
| return Ok(Vec::new()); | ||
| } | ||
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| content | ||
| .split(',') | ||
| .map(|s| s.trim().parse::<f32>()) | ||
| .collect::<std::result::Result<_, _>>() | ||
| .map_err(|e| { | ||
| InvalidFuncArgsSnafu { | ||
| err_msg: format!("Failed to parse {s} to Vector value: {e}"), | ||
| } | ||
| .build() | ||
| }) | ||
| } | ||
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| #[allow(unused)] | ||
| /// Convert a vector literal to a binary literal. | ||
| pub fn veclit_to_binlit(vec: &[f32]) -> Vec<u8> { | ||
| if cfg!(target_endian = "little") { | ||
| unsafe { | ||
| std::slice::from_raw_parts(vec.as_ptr() as *const u8, std::mem::size_of_val(vec)) | ||
| .to_vec() | ||
| } | ||
| } else { | ||
| let mut bytes = Vec::with_capacity(std::mem::size_of_val(vec)); | ||
| for e in vec { | ||
| bytes.extend_from_slice(&e.to_le_bytes()); | ||
| } | ||
| bytes | ||
| } | ||
| } | ||
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| #[cfg(test)] | ||
| mod tests { | ||
| use super::*; | ||
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| #[test] | ||
| fn test_parse_veclit_from_strlit() { | ||
| let result = parse_veclit_from_strlit("[1.0, 2.0, 3.0]").unwrap(); | ||
| assert_eq!(result, vec![1.0, 2.0, 3.0]); | ||
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| let result = parse_veclit_from_strlit("[]").unwrap(); | ||
| assert_eq!(result, Vec::<f32>::new()); | ||
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| let result = parse_veclit_from_strlit("[1.0, a, 3.0]"); | ||
| assert!(result.is_err()); | ||
| } | ||
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| #[test] | ||
| fn test_binlit_as_veclit() { | ||
| let vec = &[1.0, 2.0, 3.0]; | ||
| let bytes = veclit_to_binlit(vec); | ||
| let result = binlit_as_veclit(&bytes).unwrap(); | ||
| assert_eq!(result.as_ref(), vec); | ||
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| let invalid_bytes = [0, 0, 128]; | ||
| let result = binlit_as_veclit(&invalid_bytes); | ||
| assert!(result.is_err()); | ||
| } | ||
| } |