Examples with ReadSessionResponse com.google.cloud.bigquery.connector.common.ReadSessionResponse used on opensource projects

Example 1 with ReadSessionResponse

use of com.google.cloud.bigquery.connector.common.ReadSessionResponse in project spark-bigquery-connector by GoogleCloudDataproc.

the class BigQueryDataSourceReaderContext method createConverter.

private ReadRowsResponseToInternalRowIteratorConverter createConverter(ImmutableList<String> selectedFields, ReadSessionResponse readSessionResponse, Optional<StructType> userProvidedSchema) {
    ReadRowsResponseToInternalRowIteratorConverter converter;
    DataFormat format = readSessionCreatorConfig.getReadDataFormat();
    if (format == DataFormat.AVRO) {
        Schema schema = SchemaConverters.getSchemaWithPseudoColumns(readSessionResponse.getReadTableInfo());
        if (selectedFields.isEmpty()) {
            // means select *
            selectedFields = schema.getFields().stream().map(Field::getName).collect(ImmutableList.toImmutableList());
        } else {
            Set<String> requiredColumnSet = ImmutableSet.copyOf(selectedFields);
            schema = Schema.of(schema.getFields().stream().filter(field -> requiredColumnSet.contains(field.getName())).collect(Collectors.toList()));
        }
        return ReadRowsResponseToInternalRowIteratorConverter.avro(schema, selectedFields, readSessionResponse.getReadSession().getAvroSchema().getSchema(), userProvidedSchema);
    }
    throw new IllegalArgumentException("No known converted for " + readSessionCreatorConfig.getReadDataFormat());
}

Example 2 with ReadSessionResponse

use of com.google.cloud.bigquery.connector.common.ReadSessionResponse in project spark-bigquery-connector by GoogleCloudDataproc.

the class BigQueryDataSourceReaderContext method planBatchInputPartitionContexts.

public Stream<InputPartitionContext<ColumnarBatch>> planBatchInputPartitionContexts() {
    if (!enableBatchRead()) {
        throw new IllegalStateException("Batch reads should not be enabled");
    }
    ImmutableList<String> selectedFields = schema.map(requiredSchema -> ImmutableList.copyOf(requiredSchema.fieldNames())).orElse(ImmutableList.copyOf(fields.keySet()));
    Optional<String> filter = getCombinedFilter();
    ReadSessionResponse readSessionResponse = readSessionCreator.create(tableId, selectedFields, filter);
    ReadSession readSession = readSessionResponse.getReadSession();
    logger.info("Created read session for {}: {} for application id: {}", tableId.toString(), readSession.getName(), applicationId);
    if (selectedFields.isEmpty()) {
        // means select *
        Schema tableSchema = SchemaConverters.getSchemaWithPseudoColumns(readSessionResponse.getReadTableInfo());
        selectedFields = tableSchema.getFields().stream().map(Field::getName).collect(ImmutableList.toImmutableList());
    }
    ImmutableList<String> partitionSelectedFields = selectedFields;
    return Streams.stream(Iterables.partition(readSession.getStreamsList(), readSessionCreatorConfig.streamsPerPartition())).map(streams -> new ArrowInputPartitionContext(bigQueryReadClientFactory, bigQueryTracerFactory, streams.stream().map(ReadStream::getName).collect(Collectors.toCollection(ArrayList::new)), readSessionCreatorConfig.toReadRowsHelperOptions(), partitionSelectedFields, readSessionResponse, userProvidedSchema));
}

Example 3 with ReadSessionResponse

use of com.google.cloud.bigquery.connector.common.ReadSessionResponse in project spark-bigquery-connector by GoogleCloudDataproc.

the class BigQueryDataSourceReaderContext method planInputPartitionContexts.

public Stream<InputPartitionContext<InternalRow>> planInputPartitionContexts() {
    if (isEmptySchema()) {
        // create empty projection
        return createEmptyProjectionPartitions();
    }
    ImmutableList<String> selectedFields = schema.map(requiredSchema -> ImmutableList.copyOf(requiredSchema.fieldNames())).orElse(ImmutableList.copyOf(fields.keySet()));
    Optional<String> filter = getCombinedFilter();
    ReadSessionResponse readSessionResponse = readSessionCreator.create(tableId, selectedFields, filter);
    ReadSession readSession = readSessionResponse.getReadSession();
    logger.info("Created read session for {}: {} for application id: {}", tableId.toString(), readSession.getName(), applicationId);
    return readSession.getStreamsList().stream().map(stream -> new BigQueryInputPartitionContext(bigQueryReadClientFactory, stream.getName(), readSessionCreatorConfig.toReadRowsHelperOptions(), createConverter(selectedFields, readSessionResponse, userProvidedSchema)));
}