-
Notifications
You must be signed in to change notification settings - Fork 3.3k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Browse files
Browse the repository at this point in the history
* Closes: #34223 The purpose of this PR is to implement: 1. JNI Wrappers to consume Acero capabilities that execute Substrait Plans. 2. Java base code to offer API that consume Substrait Plans. 3. Initial Substrait documentation Lead-authored-by: david dali susanibar arce <davi.sarces@gmail.com> Co-authored-by: David Li <li.davidm96@gmail.com> Signed-off-by: David Li <li.davidm96@gmail.com>
- Loading branch information
1 parent
c4ea194
commit 95c33d8
Showing
15 changed files
with
809 additions
and
5 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,107 @@ | ||
.. 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. | ||
========= | ||
Substrait | ||
========= | ||
|
||
The ``arrow-dataset`` module can execute Substrait_ plans via the :doc:`Acero <../cpp/streaming_execution>` | ||
query engine. | ||
|
||
Executing Substrait Plans | ||
========================= | ||
|
||
Plans can reference data in files via URIs, or "named tables" that must be provided along with the plan. | ||
|
||
Here is an example of a Java program that queries a Parquet file using Java Substrait | ||
(this example use `Substrait Java`_ project to compile a SQL query to a Substrait plan): | ||
|
||
.. code-block:: Java | ||
import com.google.common.collect.ImmutableList; | ||
import io.substrait.isthmus.SqlToSubstrait; | ||
import io.substrait.proto.Plan; | ||
import org.apache.arrow.dataset.file.FileFormat; | ||
import org.apache.arrow.dataset.file.FileSystemDatasetFactory; | ||
import org.apache.arrow.dataset.jni.NativeMemoryPool; | ||
import org.apache.arrow.dataset.scanner.ScanOptions; | ||
import org.apache.arrow.dataset.scanner.Scanner; | ||
import org.apache.arrow.dataset.source.Dataset; | ||
import org.apache.arrow.dataset.source.DatasetFactory; | ||
import org.apache.arrow.dataset.substrait.AceroSubstraitConsumer; | ||
import org.apache.arrow.memory.BufferAllocator; | ||
import org.apache.arrow.memory.RootAllocator; | ||
import org.apache.arrow.vector.ipc.ArrowReader; | ||
import org.apache.calcite.sql.parser.SqlParseException; | ||
import java.nio.ByteBuffer; | ||
import java.util.HashMap; | ||
import java.util.Map; | ||
public class ClientSubstrait { | ||
public static void main(String[] args) { | ||
String uri = "file:///data/tpch_parquet/nation.parquet"; | ||
ScanOptions options = new ScanOptions(/*batchSize*/ 32768); | ||
try ( | ||
BufferAllocator allocator = new RootAllocator(); | ||
DatasetFactory datasetFactory = new FileSystemDatasetFactory(allocator, NativeMemoryPool.getDefault(), | ||
FileFormat.PARQUET, uri); | ||
Dataset dataset = datasetFactory.finish(); | ||
Scanner scanner = dataset.newScan(options); | ||
ArrowReader reader = scanner.scanBatches() | ||
) { | ||
// map table to reader | ||
Map<String, ArrowReader> mapTableToArrowReader = new HashMap<>(); | ||
mapTableToArrowReader.put("NATION", reader); | ||
// get binary plan | ||
Plan plan = getPlan(); | ||
ByteBuffer substraitPlan = ByteBuffer.allocateDirect(plan.toByteArray().length); | ||
substraitPlan.put(plan.toByteArray()); | ||
// run query | ||
try (ArrowReader arrowReader = new AceroSubstraitConsumer(allocator).runQuery( | ||
substraitPlan, | ||
mapTableToArrowReader | ||
)) { | ||
while (arrowReader.loadNextBatch()) { | ||
System.out.println(arrowReader.getVectorSchemaRoot().contentToTSVString()); | ||
} | ||
} | ||
} catch (Exception e) { | ||
e.printStackTrace(); | ||
} | ||
} | ||
static Plan getPlan() throws SqlParseException { | ||
String sql = "SELECT * from nation"; | ||
String nation = "CREATE TABLE NATION (N_NATIONKEY BIGINT NOT NULL, N_NAME CHAR(25), " + | ||
"N_REGIONKEY BIGINT NOT NULL, N_COMMENT VARCHAR(152))"; | ||
SqlToSubstrait sqlToSubstrait = new SqlToSubstrait(); | ||
Plan plan = sqlToSubstrait.execute(sql, ImmutableList.of(nation)); | ||
return plan; | ||
} | ||
} | ||
.. code-block:: text | ||
// Results example: | ||
FieldPath(0) FieldPath(1) FieldPath(2) FieldPath(3) | ||
0 ALGERIA 0 haggle. carefully final deposits detect slyly agai | ||
1 ARGENTINA 1 al foxes promise slyly according to the regular accounts. bold requests alon | ||
.. _`Substrait`: https://substrait.io/ | ||
.. _`Substrait Java`: https://github.com/substrait-io/substrait-java | ||
.. _`Acero`: https://arrow.apache.org/docs/cpp/streaming_execution.html |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.