Examples with FileStatusCache org.apache.spark.sql.execution.datasources.FileStatusCache used on opensource projects

Example 1 with FileStatusCache

use of org.apache.spark.sql.execution.datasources.FileStatusCache in project iceberg by apache.

the class Spark3Util method getPartitions.

/**
 * Use Spark to list all partitions in the table.
 *
 * @param spark a Spark session
 * @param rootPath a table identifier
 * @param format format of the file
 * @return all table's partitions
 */
public static List<SparkPartition> getPartitions(SparkSession spark, Path rootPath, String format) {
    FileStatusCache fileStatusCache = FileStatusCache.getOrCreate(spark);
    Map<String, String> emptyMap = Collections.emptyMap();
    InMemoryFileIndex fileIndex = new InMemoryFileIndex(spark, JavaConverters.collectionAsScalaIterableConverter(ImmutableList.of(rootPath)).asScala().toSeq(), JavaConverters.mapAsScalaMapConverter(emptyMap).asScala().toMap(Predef.conforms()), Option.empty(), fileStatusCache, Option.empty(), Option.empty());
    org.apache.spark.sql.execution.datasources.PartitionSpec spec = fileIndex.partitionSpec();
    StructType schema = spec.partitionColumns();
    return JavaConverters.seqAsJavaListConverter(spec.partitions()).asJava().stream().map(partition -> {
        Map<String, String> values = Maps.newHashMap();
        JavaConverters.asJavaIterableConverter(schema).asJava().forEach(field -> {
            int fieldIndex = schema.fieldIndex(field.name());
            Object catalystValue = partition.values().get(fieldIndex, field.dataType());
            Object value = CatalystTypeConverters.convertToScala(catalystValue, field.dataType());
            values.put(field.name(), String.valueOf(value));
        });
        return new SparkPartition(values, partition.path().toString(), format);
    }).collect(Collectors.toList());
}

Example 2 with FileStatusCache

use of org.apache.spark.sql.execution.datasources.FileStatusCache in project iceberg by apache.

the class Spark3Util method getPartitions.

/**
 * Use Spark to list all partitions in the table.
 *
 * @param spark a Spark session
 * @param rootPath a table identifier
 * @param format format of the file
 * @param partitionFilter partitionFilter of the file
 * @return all table's partitions
 */
public static List<SparkPartition> getPartitions(SparkSession spark, Path rootPath, String format, Map<String, String> partitionFilter) {
    FileStatusCache fileStatusCache = FileStatusCache.getOrCreate(spark);
    InMemoryFileIndex fileIndex = new InMemoryFileIndex(spark, JavaConverters.collectionAsScalaIterableConverter(ImmutableList.of(rootPath)).asScala().toSeq(), scala.collection.immutable.Map$.MODULE$.<String, String>empty(), Option.empty(), fileStatusCache, Option.empty(), Option.empty());
    org.apache.spark.sql.execution.datasources.PartitionSpec spec = fileIndex.partitionSpec();
    StructType schema = spec.partitionColumns();
    if (schema.isEmpty()) {
        return Lists.newArrayList();
    }
    List<org.apache.spark.sql.catalyst.expressions.Expression> filterExpressions = SparkUtil.partitionMapToExpression(schema, partitionFilter);
    Seq<org.apache.spark.sql.catalyst.expressions.Expression> scalaPartitionFilters = JavaConverters.asScalaBufferConverter(filterExpressions).asScala().toIndexedSeq();
    List<org.apache.spark.sql.catalyst.expressions.Expression> dataFilters = Lists.newArrayList();
    Seq<org.apache.spark.sql.catalyst.expressions.Expression> scalaDataFilters = JavaConverters.asScalaBufferConverter(dataFilters).asScala().toIndexedSeq();
    Seq<PartitionDirectory> filteredPartitions = fileIndex.listFiles(scalaPartitionFilters, scalaDataFilters).toIndexedSeq();
    return JavaConverters.seqAsJavaListConverter(filteredPartitions).asJava().stream().map(partition -> {
        Map<String, String> values = Maps.newHashMap();
        JavaConverters.asJavaIterableConverter(schema).asJava().forEach(field -> {
            int fieldIndex = schema.fieldIndex(field.name());
            Object catalystValue = partition.values().get(fieldIndex, field.dataType());
            Object value = CatalystTypeConverters.convertToScala(catalystValue, field.dataType());
            values.put(field.name(), String.valueOf(value));
        });
        FileStatus fileStatus = JavaConverters.seqAsJavaListConverter(partition.files()).asJava().get(0);
        return new SparkPartition(values, fileStatus.getPath().getParent().toString(), format);
    }).collect(Collectors.toList());
}