[
https://issues.apache.org/jira/browse/BEAM-8933?focusedWorklogId=616516&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-616516
]
ASF GitHub Bot logged work on BEAM-8933:
----------------------------------------
Author: ASF GitHub Bot
Created on: 29/Jun/21 14:23
Start Date: 29/Jun/21 14:23
Worklog Time Spent: 10m
Work Description: MiguelAnzoWizeline commented on a change in pull
request #14586:
URL: https://github.com/apache/beam/pull/14586#discussion_r660670124
##########
File path:
sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/BigQueryStorageArrowReader.java
##########
@@ -0,0 +1,105 @@
+/*
+ * 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.
+ */
+package org.apache.beam.sdk.io.gcp.bigquery;
+
+import com.google.cloud.bigquery.storage.v1.ArrowSchema;
+import com.google.cloud.bigquery.storage.v1.ReadRowsResponse;
+import com.google.cloud.bigquery.storage.v1.ReadSession;
+import java.io.IOException;
+import java.io.InputStream;
+import javax.annotation.Nullable;
+import org.apache.arrow.memory.RootAllocator;
+import org.apache.arrow.vector.types.pojo.Schema;
+import org.apache.avro.generic.GenericRecord;
+import org.apache.beam.sdk.extensions.arrow.ArrowConversion;
+import
org.apache.beam.sdk.extensions.arrow.ArrowConversion.RecordBatchRowIterator;
+import org.apache.beam.sdk.schemas.utils.AvroUtils;
+import org.apache.beam.sdk.values.Row;
+
+@SuppressWarnings("nullness")
+class BigQueryStorageArrowReader implements BigQueryStorageReader {
+
+ private org.apache.beam.sdk.schemas.Schema arrowBeamSchema;
+ private @Nullable RecordBatchRowIterator recordBatchIterator;
+ private long rowCount;
+ private ArrowSchema protoSchema;
+ private @Nullable RootAllocator alloc;
+
+ BigQueryStorageArrowReader(ReadSession readSession) throws IOException {
+ protoSchema = readSession.getArrowSchema();
+ InputStream input = protoSchema.getSerializedSchema().newInput();
+ this.arrowBeamSchema =
+ ArrowConversion.ArrowSchemaTranslator.toBeamSchema(
+ ArrowConversion.arrowSchemaFromInput(input));
+ this.rowCount = 0;
+ this.alloc = null;
+ }
+
+ @Override
+ public void processReadRowsResponse(ReadRowsResponse readRowsResponse)
throws IOException {
+ com.google.cloud.bigquery.storage.v1.ArrowRecordBatch recordBatch =
+ readRowsResponse.getArrowRecordBatch();
+ rowCount = recordBatch.getRowCount();
+ this.alloc = new RootAllocator(Long.MAX_VALUE);
+ InputStream input = protoSchema.getSerializedSchema().newInput();
+ Schema arrowSchema = ArrowConversion.arrowSchemaFromInput(input);
+ this.recordBatchIterator =
+ ArrowConversion.rowsFromSerializedRecordBatch(
+ arrowSchema, recordBatch.getSerializedRecordBatch().newInput(),
this.alloc);
+ }
+
+ @Override
+ public long getRowCount() {
+ return rowCount;
+ }
+
+ @Override
+ public GenericRecord readSingleRecord() throws IOException {
+ if (recordBatchIterator == null) {
+ throw new IOException("Not Initialized");
+ }
+ Row row = recordBatchIterator.next();
+ return AvroUtils.toGenericRecord(row, null);
Review comment:
Issue created [here](https://issues.apache.org/jira/browse/BEAM-12551)
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Issue Time Tracking
-------------------
Worklog Id: (was: 616516)
Time Spent: 64h 20m (was: 64h 10m)
> BigQuery IO should support reading Arrow format over Storage API
> ----------------------------------------------------------------
>
> Key: BEAM-8933
> URL: https://issues.apache.org/jira/browse/BEAM-8933
> Project: Beam
> Issue Type: Improvement
> Components: io-java-gcp
> Reporter: Kirill Kozlov
> Assignee: Miguel Anzo
> Priority: P3
> Time Spent: 64h 20m
> Remaining Estimate: 0h
>
> As of right now BigQuery uses Avro format for reading and writing.
> We should add a config to BigQueryIO to specify which format to use: Arrow or
> Avro (with Avro as default).
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