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chore: Move some utility methods to submodules of scalar_funcs
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108 changes: 108 additions & 0 deletions
108
core/src/execution/datafusion/expressions/scalar_funcs/hash_expressions.rs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| // Licensed to the Apache Software Foundation (ASF) under one | ||
| // or more contributor license agreements. See the NOTICE file | ||
| // distributed with this work for additional information | ||
| // regarding copyright ownership. The ASF licenses this file | ||
| // to you 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 crate::execution::datafusion::spark_hash::{create_murmur3_hashes, create_xxhash64_hashes}; | ||
| use arrow_array::{ArrayRef, Int32Array, Int64Array}; | ||
| use datafusion_common::{internal_err, DataFusionError, ScalarValue}; | ||
| use datafusion_expr::ColumnarValue; | ||
| use std::sync::Arc; | ||
|
|
||
| pub fn spark_murmur3_hash(args: &[ColumnarValue]) -> Result<ColumnarValue, DataFusionError> { | ||
| let length = args.len(); | ||
| let seed = &args[length - 1]; | ||
| match seed { | ||
| ColumnarValue::Scalar(ScalarValue::Int32(Some(seed))) => { | ||
| // iterate over the arguments to find out the length of the array | ||
| let num_rows = args[0..args.len() - 1] | ||
| .iter() | ||
| .find_map(|arg| match arg { | ||
| ColumnarValue::Array(array) => Some(array.len()), | ||
| ColumnarValue::Scalar(_) => None, | ||
| }) | ||
| .unwrap_or(1); | ||
| let mut hashes: Vec<u32> = vec![0_u32; num_rows]; | ||
| hashes.fill(*seed as u32); | ||
| let arrays = args[0..args.len() - 1] | ||
| .iter() | ||
| .map(|arg| match arg { | ||
| ColumnarValue::Array(array) => array.clone(), | ||
| ColumnarValue::Scalar(scalar) => { | ||
| scalar.clone().to_array_of_size(num_rows).unwrap() | ||
| } | ||
| }) | ||
| .collect::<Vec<ArrayRef>>(); | ||
| create_murmur3_hashes(&arrays, &mut hashes)?; | ||
| if num_rows == 1 { | ||
| Ok(ColumnarValue::Scalar(ScalarValue::Int32(Some( | ||
| hashes[0] as i32, | ||
| )))) | ||
| } else { | ||
| let hashes: Vec<i32> = hashes.into_iter().map(|x| x as i32).collect(); | ||
| Ok(ColumnarValue::Array(Arc::new(Int32Array::from(hashes)))) | ||
| } | ||
| } | ||
| _ => { | ||
| internal_err!( | ||
| "The seed of function murmur3_hash must be an Int32 scalar value, but got: {:?}.", | ||
| seed | ||
| ) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| pub fn spark_xxhash64(args: &[ColumnarValue]) -> Result<ColumnarValue, DataFusionError> { | ||
| let length = args.len(); | ||
| let seed = &args[length - 1]; | ||
| match seed { | ||
| ColumnarValue::Scalar(ScalarValue::Int64(Some(seed))) => { | ||
| // iterate over the arguments to find out the length of the array | ||
| let num_rows = args[0..args.len() - 1] | ||
| .iter() | ||
| .find_map(|arg| match arg { | ||
| ColumnarValue::Array(array) => Some(array.len()), | ||
| ColumnarValue::Scalar(_) => None, | ||
| }) | ||
| .unwrap_or(1); | ||
| let mut hashes: Vec<u64> = vec![0_u64; num_rows]; | ||
| hashes.fill(*seed as u64); | ||
| let arrays = args[0..args.len() - 1] | ||
| .iter() | ||
| .map(|arg| match arg { | ||
| ColumnarValue::Array(array) => array.clone(), | ||
| ColumnarValue::Scalar(scalar) => { | ||
| scalar.clone().to_array_of_size(num_rows).unwrap() | ||
| } | ||
| }) | ||
| .collect::<Vec<ArrayRef>>(); | ||
| create_xxhash64_hashes(&arrays, &mut hashes)?; | ||
| if num_rows == 1 { | ||
| Ok(ColumnarValue::Scalar(ScalarValue::Int64(Some( | ||
| hashes[0] as i64, | ||
| )))) | ||
| } else { | ||
| let hashes: Vec<i64> = hashes.into_iter().map(|x| x as i64).collect(); | ||
| Ok(ColumnarValue::Array(Arc::new(Int64Array::from(hashes)))) | ||
| } | ||
| } | ||
| _ => { | ||
| internal_err!( | ||
| "The seed of function xxhash64 must be an Int64 scalar value, but got: {:?}.", | ||
| seed | ||
| ) | ||
| } | ||
| } | ||
| } |
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