diff --git a/src/common/function/src/scalars/vector.rs b/src/common/function/src/scalars/vector.rs index 0c0428ce9a45..d462b917af59 100644 --- a/src/common/function/src/scalars/vector.rs +++ b/src/common/function/src/scalars/vector.rs @@ -16,6 +16,7 @@ mod convert; mod distance; pub(crate) mod impl_conv; mod scalar_add; +mod scalar_mul; use std::sync::Arc; @@ -36,5 +37,6 @@ impl VectorFunction { // scalar calculation registry.register(Arc::new(scalar_add::ScalarAddFunction)); + registry.register(Arc::new(scalar_mul::ScalarMulFunction)); } } diff --git a/src/common/function/src/scalars/vector/scalar_mul.rs b/src/common/function/src/scalars/vector/scalar_mul.rs new file mode 100644 index 000000000000..3c7fe4c07035 --- /dev/null +++ b/src/common/function/src/scalars/vector/scalar_mul.rs @@ -0,0 +1,173 @@ +// 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. + +use std::borrow::Cow; +use std::fmt::Display; + +use common_query::error::{InvalidFuncArgsSnafu, Result}; +use common_query::prelude::Signature; +use datatypes::prelude::ConcreteDataType; +use datatypes::scalars::ScalarVectorBuilder; +use datatypes::vectors::{BinaryVectorBuilder, MutableVector, VectorRef}; +use nalgebra::DVectorView; +use snafu::ensure; + +use crate::function::{Function, FunctionContext}; +use crate::helper; +use crate::scalars::vector::impl_conv::{as_veclit, as_veclit_if_const, veclit_to_binlit}; + +const NAME: &str = "vec_scalar_mul"; + +/// Multiples a scalar to each element of a vector. +/// +/// # Example +/// +/// ```sql +/// SELECT vec_to_string(vec_scalar_mul(2, "[1, 2, 3]")) as result; +/// +/// +---------+ +/// | result | +/// +---------+ +/// | [2,4,6] | +/// +---------+ +/// +/// -- 1/scalar to simulate division +/// SELECT vec_to_string(vec_scalar_mul(0.5, "[2, 4, 6]")) as result; +/// +/// +---------+ +/// | result | +/// +---------+ +/// | [1,2,3] | +/// +---------+ +/// ``` +#[derive(Debug, Clone, Default)] +pub struct ScalarMulFunction; + +impl Function for ScalarMulFunction { + fn name(&self) -> &str { + NAME + } + + fn return_type(&self, _input_types: &[ConcreteDataType]) -> Result { + Ok(ConcreteDataType::binary_datatype()) + } + + fn signature(&self) -> Signature { + helper::one_of_sigs2( + vec![ConcreteDataType::float64_datatype()], + vec![ + ConcreteDataType::string_datatype(), + ConcreteDataType::binary_datatype(), + ], + ) + } + + fn eval(&self, _func_ctx: FunctionContext, columns: &[VectorRef]) -> Result { + ensure!( + columns.len() == 2, + InvalidFuncArgsSnafu { + err_msg: format!( + "The length of the args is not correct, expect exactly two, have: {}", + columns.len() + ), + } + ); + let arg0 = &columns[0]; + let arg1 = &columns[1]; + + let len = arg0.len(); + let mut result = BinaryVectorBuilder::with_capacity(len); + if len == 0 { + return Ok(result.to_vector()); + } + + let arg1_const = as_veclit_if_const(arg1)?; + + for i in 0..len { + let arg0 = arg0.get(i).as_f64_lossy(); + let Some(arg0) = arg0 else { + result.push_null(); + continue; + }; + + let arg1 = match arg1_const.as_ref() { + Some(arg1) => Some(Cow::Borrowed(arg1.as_ref())), + None => as_veclit(arg1.get_ref(i))?, + }; + let Some(arg1) = arg1 else { + result.push_null(); + continue; + }; + + let vec = DVectorView::from_slice(&arg1, arg1.len()); + let vec_res = vec.scale(arg0 as _); + + let veclit = vec_res.as_slice(); + let binlit = veclit_to_binlit(veclit); + result.push(Some(&binlit)); + } + + Ok(result.to_vector()) + } +} + +impl Display for ScalarMulFunction { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + write!(f, "{}", NAME.to_ascii_uppercase()) + } +} + +#[cfg(test)] +mod tests { + use std::sync::Arc; + + use datatypes::vectors::{Float32Vector, StringVector}; + + use super::*; + + #[test] + fn test_scalar_mul() { + let func = ScalarMulFunction; + + let input0 = Arc::new(Float32Vector::from(vec![ + Some(2.0), + Some(-0.5), + None, + Some(3.0), + ])); + let input1 = Arc::new(StringVector::from(vec![ + Some("[1.0,2.0,3.0]".to_string()), + Some("[8.0,10.0,12.0]".to_string()), + Some("[7.0,8.0,9.0]".to_string()), + None, + ])); + + let result = func + .eval(FunctionContext::default(), &[input0, input1]) + .unwrap(); + + let result = result.as_ref(); + assert_eq!(result.len(), 4); + assert_eq!( + result.get_ref(0).as_binary().unwrap(), + Some(veclit_to_binlit(&[2.0, 4.0, 6.0]).as_slice()) + ); + assert_eq!( + result.get_ref(1).as_binary().unwrap(), + Some(veclit_to_binlit(&[-4.0, -5.0, -6.0]).as_slice()) + ); + assert!(result.get_ref(2).is_null()); + assert!(result.get_ref(3).is_null()); + } +} diff --git a/tests/cases/standalone/common/function/vector/vector_scalar.result b/tests/cases/standalone/common/function/vector/vector_scalar.result index 5750a0adfdb8..a379c385fa24 100644 --- a/tests/cases/standalone/common/function/vector/vector_scalar.result +++ b/tests/cases/standalone/common/function/vector/vector_scalar.result @@ -46,3 +46,51 @@ SELECT vec_to_string(vec_scalar_add(-1, '[1.0, 2.0]')); | [0,1] | +-------------------------------------------------------------+ +SELECT vec_to_string(vec_scalar_mul(1.0, '[1.0, 2.0]')); + ++--------------------------------------------------------------+ +| vec_to_string(vec_scalar_mul(Float64(1),Utf8("[1.0, 2.0]"))) | ++--------------------------------------------------------------+ +| [1,2] | ++--------------------------------------------------------------+ + +SELECT vec_to_string(vec_scalar_mul(-0.5, '[2.0, 4.0]')); + ++-----------------------------------------------------------------+ +| vec_to_string(vec_scalar_mul(Float64(-0.5),Utf8("[2.0, 4.0]"))) | ++-----------------------------------------------------------------+ +| [-1,-2] | ++-----------------------------------------------------------------+ + +SELECT vec_to_string(vec_scalar_mul(1.0, parse_vec('[1.0, 2.0]'))); + ++-------------------------------------------------------------------------+ +| vec_to_string(vec_scalar_mul(Float64(1),parse_vec(Utf8("[1.0, 2.0]")))) | ++-------------------------------------------------------------------------+ +| [1,2] | ++-------------------------------------------------------------------------+ + +SELECT vec_to_string(vec_scalar_mul(-0.5, parse_vec('[2.0, 4.0]'))); + ++----------------------------------------------------------------------------+ +| vec_to_string(vec_scalar_mul(Float64(-0.5),parse_vec(Utf8("[2.0, 4.0]")))) | ++----------------------------------------------------------------------------+ +| [-1,-2] | ++----------------------------------------------------------------------------+ + +SELECT vec_to_string(vec_scalar_mul(1, '[1.0, 2.0]')); + ++------------------------------------------------------------+ +| vec_to_string(vec_scalar_mul(Int64(1),Utf8("[1.0, 2.0]"))) | ++------------------------------------------------------------+ +| [1,2] | ++------------------------------------------------------------+ + +SELECT vec_to_string(vec_scalar_mul(-0.5, '[2.0, 4.0]')); + ++-----------------------------------------------------------------+ +| vec_to_string(vec_scalar_mul(Float64(-0.5),Utf8("[2.0, 4.0]"))) | ++-----------------------------------------------------------------+ +| [-1,-2] | ++-----------------------------------------------------------------+ + diff --git a/tests/cases/standalone/common/function/vector/vector_scalar.sql b/tests/cases/standalone/common/function/vector/vector_scalar.sql index e438ac6a40ba..2727f2970507 100644 --- a/tests/cases/standalone/common/function/vector/vector_scalar.sql +++ b/tests/cases/standalone/common/function/vector/vector_scalar.sql @@ -9,3 +9,15 @@ SELECT vec_to_string(vec_scalar_add(-1.0, parse_vec('[1.0, 2.0]'))); SELECT vec_to_string(vec_scalar_add(1, '[1.0, 2.0]')); SELECT vec_to_string(vec_scalar_add(-1, '[1.0, 2.0]')); + +SELECT vec_to_string(vec_scalar_mul(1.0, '[1.0, 2.0]')); + +SELECT vec_to_string(vec_scalar_mul(-0.5, '[2.0, 4.0]')); + +SELECT vec_to_string(vec_scalar_mul(1.0, parse_vec('[1.0, 2.0]'))); + +SELECT vec_to_string(vec_scalar_mul(-0.5, parse_vec('[2.0, 4.0]'))); + +SELECT vec_to_string(vec_scalar_mul(1, '[1.0, 2.0]')); + +SELECT vec_to_string(vec_scalar_mul(-0.5, '[2.0, 4.0]')); \ No newline at end of file