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feat: improve Spark from_utc_timestamp compatibility #25979
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -106,3 +106,7 @@ name = "sha2" | |
| [[bench]] | ||
| harness = false | ||
| name = "floor" | ||
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||
| [[bench]] | ||
| harness = false | ||
| name = "from_utc_timestamp" | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| // 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. | ||
|
|
||
| //! Measure the physical evaluator with a timezone column. The narrow and wide batches use | ||
| //! identical timestamp and timezone columns; only the number of unused Int64 columns differs. | ||
| //! Mixed-null timestamps expose any cost from filtering those unrelated columns. | ||
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| use std::hint::black_box; | ||
| use std::sync::Arc; | ||
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| use arrow::array::{ArrayRef, Int64Array, StringArray, TimestampMicrosecondArray}; | ||
| use arrow::datatypes::{DataType, Field, Schema, TimeUnit}; | ||
| use arrow::record_batch::RecordBatch; | ||
| use criterion::{BenchmarkId, Criterion, Throughput, criterion_group, criterion_main}; | ||
| use datafusion::physical_expr::expressions::Column; | ||
| use datafusion_physical_expr_common::physical_expr::PhysicalExpr; | ||
| use datafusion_spark::function::datetime::from_utc_timestamp::SparkFromUtcTimestampExpr; | ||
|
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||
| fn batch(rows: usize, columns: usize, half_null: bool) -> RecordBatch { | ||
| let mut fields = vec![ | ||
| Field::new( | ||
| "timestamp", | ||
| DataType::Timestamp(TimeUnit::Microsecond, None), | ||
| true, | ||
| ), | ||
| Field::new("timezone", DataType::Utf8, false), | ||
| ]; | ||
| let mut arrays: Vec<ArrayRef> = vec![ | ||
| Arc::new(TimestampMicrosecondArray::from_iter((0..rows).map(|row| { | ||
| (!half_null || row % 2 != 0).then_some(row as i64 * 86_400_000_000) | ||
| }))), | ||
| Arc::new(StringArray::from_iter_values( | ||
| (0..rows).map(|row| if (row / 2) % 2 == 0 { "PST" } else { "EST" }), | ||
| )), | ||
| ]; | ||
|
|
||
| for column in 2..columns { | ||
| fields.push(Field::new( | ||
| format!("unused_{column}"), | ||
| DataType::Int64, | ||
| false, | ||
| )); | ||
| arrays.push(Arc::new(Int64Array::from_iter_values( | ||
| (0..rows).map(|row| (column * rows + row) as i64), | ||
| ))); | ||
| } | ||
|
|
||
| RecordBatch::try_new(Arc::new(Schema::new(fields)), arrays).unwrap() | ||
| } | ||
|
|
||
| fn criterion_benchmark(c: &mut Criterion) { | ||
| let rows = 8192; | ||
| let expr = SparkFromUtcTimestampExpr::new( | ||
| Arc::new(Column::new("timestamp", 0)), | ||
| Arc::new(Column::new("timezone", 1)), | ||
| ); | ||
| let mut group = c.benchmark_group("from_utc_timestamp_column"); | ||
| group.throughput(Throughput::Elements(rows as u64)); | ||
|
|
||
| for columns in [2, 64, 256] { | ||
| for (half_null, name) in [(false, "no_nulls"), (true, "half_nulls")] { | ||
| let batch = batch(rows, columns, half_null); | ||
| let result = expr.evaluate(&batch).unwrap().into_array(rows).unwrap(); | ||
| assert_eq!(result.len(), rows); | ||
| assert_eq!(result.null_count(), if half_null { rows / 2 } else { 0 }); | ||
|
|
||
| group.bench_with_input( | ||
| BenchmarkId::new(format!("{columns}_columns"), name), | ||
| &batch, | ||
| |b, batch| { | ||
| b.iter(|| black_box(expr.evaluate(black_box(batch)).unwrap())); | ||
| }, | ||
| ); | ||
| } | ||
| } | ||
| group.finish(); | ||
| } | ||
|
|
||
| criterion_group!(benches, criterion_benchmark); | ||
| criterion_main!(benches); | ||
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Nonblocking: could we also benchmark a computed timezone expression, with sparse and mixed null timestamps, across these batch widths? This
Columntakes the fast path and bypassesevaluate_selection, so it does not exercise the branch that filters every input column. A computed-expression case would measure the remaining allocation/width tradeoff; a literal timezone case would also cover scalar broadcasting.