You are viewing a plain text version of this content. The canonical link for it is here.
Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2020/06/04 06:39:36 UTC
[GitHub] [arrow] houqp commented on a change in pull request #7324: ARROW-9005: [Rust] [Datafusion] support sort expression
houqp commented on a change in pull request #7324:
URL: https://github.com/apache/arrow/pull/7324#discussion_r435023936
##########
File path: rust/arrow/src/compute/kernels/concat.rs
##########
@@ -0,0 +1,395 @@
+// 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.
+
+//! Defines concat kernel for `ArrayRef`
+//!
+//! Example:
+//!
+//! ```
+//! use std::sync::Arc;
+//! use arrow::array::{ArrayRef, StringArray};
+//! use arrow::compute::concat;
+//!
+//! let arr = concat(&vec![
+//! Arc::new(StringArray::from(vec!["hello", "world"])) as ArrayRef,
+//! Arc::new(StringArray::from(vec!["!"])) as ArrayRef,
+//! ]).unwrap();
+//! assert_eq!(arr.len(), 3);
+//! ```
+
+use std::sync::Arc;
+
+use crate::array::*;
+use crate::datatypes::*;
+use crate::error::{ArrowError, Result};
+
+use TimeUnit::*;
+
+/// Concatenate multiple `ArrayRef` with the same type.
+///
+/// Returns a new ArrayRef.
+pub fn concat(array_list: &Vec<ArrayRef>) -> Result<ArrayRef> {
+ let mut data_type: Option<DataType> = None;
+ let array_data_list = &array_list
+ .iter()
+ .map(|a| {
+ let array_data = a.data_ref().clone();
+ let curr_data_type = array_data.data_type().clone();
+ match &data_type {
+ Some(t) => {
+ if t != &curr_data_type {
+ return Err(ArrowError::ComputeError(
+ "Cannot concat arrays with data type".to_string(),
+ ));
+ }
+ }
+ None => {
+ data_type = Some(curr_data_type);
+ }
+ }
+ Ok(array_data)
+ })
+ .collect::<Result<Vec<ArrayDataRef>>>()?;
+
+ let data_type = match data_type {
+ None => {
+ return Err(ArrowError::ComputeError(
+ "Cannot concat 0 array".to_string(),
+ ));
+ }
+ Some(t) => t,
+ };
+ match data_type {
+ DataType::Utf8 => concat_raw_string(array_data_list),
+ DataType::Boolean => concat_primitive::<BooleanType>(array_data_list),
+ DataType::Int8 => concat_raw_primitive::<Int8Type>(array_data_list),
+ DataType::Int16 => concat_raw_primitive::<Int16Type>(array_data_list),
+ DataType::Int32 => concat_raw_primitive::<Int32Type>(array_data_list),
+ DataType::Int64 => concat_raw_primitive::<Int64Type>(array_data_list),
+ DataType::UInt8 => concat_raw_primitive::<UInt8Type>(array_data_list),
+ DataType::UInt16 => concat_raw_primitive::<UInt16Type>(array_data_list),
+ DataType::UInt32 => concat_raw_primitive::<UInt32Type>(array_data_list),
+ DataType::UInt64 => concat_raw_primitive::<UInt64Type>(array_data_list),
+ DataType::Float32 => concat_raw_primitive::<Float32Type>(array_data_list),
+ DataType::Float64 => concat_raw_primitive::<Float64Type>(array_data_list),
+ DataType::Date32(_) => concat_raw_primitive::<Date32Type>(array_data_list),
+ DataType::Date64(_) => concat_raw_primitive::<Date64Type>(array_data_list),
+ DataType::Time32(Second) => {
+ concat_raw_primitive::<Time32SecondType>(array_data_list)
+ }
+ DataType::Time32(Millisecond) => {
+ concat_raw_primitive::<Time32MillisecondType>(array_data_list)
+ }
+ DataType::Time64(Microsecond) => {
+ concat_raw_primitive::<Time64MicrosecondType>(array_data_list)
+ }
+ DataType::Time64(Nanosecond) => {
+ concat_raw_primitive::<Time64NanosecondType>(array_data_list)
+ }
+ DataType::Timestamp(Second, _) => {
+ concat_raw_primitive::<TimestampSecondType>(array_data_list)
+ }
+ DataType::Timestamp(Millisecond, _) => {
+ concat_raw_primitive::<TimestampMillisecondType>(array_data_list)
+ }
+ DataType::Timestamp(Microsecond, _) => {
+ concat_raw_primitive::<TimestampMicrosecondType>(array_data_list)
+ }
+ DataType::Timestamp(Nanosecond, _) => {
+ concat_raw_primitive::<TimestampNanosecondType>(array_data_list)
+ }
+ DataType::Interval(IntervalUnit::YearMonth) => {
+ concat_raw_primitive::<IntervalYearMonthType>(array_data_list)
+ }
+ DataType::Interval(IntervalUnit::DayTime) => {
+ concat_raw_primitive::<IntervalDayTimeType>(array_data_list)
+ }
+ DataType::Duration(TimeUnit::Second) => {
+ concat_raw_primitive::<DurationSecondType>(array_data_list)
+ }
+ DataType::Duration(TimeUnit::Millisecond) => {
+ concat_raw_primitive::<DurationMillisecondType>(array_data_list)
+ }
+ DataType::Duration(TimeUnit::Microsecond) => {
+ concat_raw_primitive::<DurationMicrosecondType>(array_data_list)
+ }
+ DataType::Duration(TimeUnit::Nanosecond) => {
+ concat_raw_primitive::<DurationNanosecondType>(array_data_list)
+ }
+ t => unimplemented!("Concat not supported for data type {:?}", t),
+ }
+}
+
+fn concat_primitive<T>(array_data_list: &Vec<ArrayDataRef>) -> Result<ArrayRef>
Review comment:
good catch. I have updated it.
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
users@infra.apache.org