org.apache.spark.sql.catalyst.expressions.AttributeReference Java Examples

The following examples show how to use org.apache.spark.sql.catalyst.expressions.AttributeReference. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: SparkBenchmarkUtil.java    From iceberg with Apache License 2.0 6 votes vote down vote up 
public static UnsafeProjection projection(Schema expectedSchema, Schema actualSchema) {
  StructType struct = SparkSchemaUtil.convert(actualSchema);

  List<AttributeReference> refs = JavaConverters.seqAsJavaListConverter(struct.toAttributes()).asJava();
  List<Attribute> attrs = Lists.newArrayListWithExpectedSize(struct.fields().length);
  List<Expression> exprs = Lists.newArrayListWithExpectedSize(struct.fields().length);

  for (AttributeReference ref : refs) {
    attrs.add(ref.toAttribute());
  }

  for (Types.NestedField field : expectedSchema.columns()) {
    int indexInIterSchema = struct.fieldIndex(field.name());
    exprs.add(refs.get(indexInIterSchema));
  }

  return UnsafeProjection.create(
      JavaConverters.asScalaBufferConverter(exprs).asScala().toSeq(),
      JavaConverters.asScalaBufferConverter(attrs).asScala().toSeq());
}
Example #2
Source File: RowDataReader.java    From iceberg with Apache License 2.0 6 votes vote down vote up 
private static UnsafeProjection projection(Schema finalSchema, Schema readSchema) {
  StructType struct = SparkSchemaUtil.convert(readSchema);

  List<AttributeReference> refs = JavaConverters.seqAsJavaListConverter(struct.toAttributes()).asJava();
  List<Attribute> attrs = Lists.newArrayListWithExpectedSize(struct.fields().length);
  List<org.apache.spark.sql.catalyst.expressions.Expression> exprs =
      Lists.newArrayListWithExpectedSize(struct.fields().length);

  for (AttributeReference ref : refs) {
    attrs.add(ref.toAttribute());
  }

  for (Types.NestedField field : finalSchema.columns()) {
    int indexInReadSchema = struct.fieldIndex(field.name());
    exprs.add(refs.get(indexInReadSchema));
  }

  return UnsafeProjection.create(
      JavaConverters.asScalaBufferConverter(exprs).asScala().toSeq(),
      JavaConverters.asScalaBufferConverter(attrs).asScala().toSeq());
}
Example #3
Source File: Reader.java    From iceberg with Apache License 2.0 6 votes vote down vote up 
private static UnsafeProjection projection(Schema finalSchema, Schema readSchema) {
  StructType struct = convert(readSchema);

  List<AttributeReference> refs = seqAsJavaListConverter(struct.toAttributes()).asJava();
  List<Attribute> attrs = Lists.newArrayListWithExpectedSize(struct.fields().length);
  List<org.apache.spark.sql.catalyst.expressions.Expression> exprs =
      Lists.newArrayListWithExpectedSize(struct.fields().length);

  for (AttributeReference ref : refs) {
    attrs.add(ref.toAttribute());
  }

  for (Types.NestedField field : finalSchema.columns()) {
    int indexInReadSchema = struct.fieldIndex(field.name());
    exprs.add(refs.get(indexInReadSchema));
  }

  return UnsafeProjection.create(
      asScalaBufferConverter(exprs).asScala().toSeq(),
      asScalaBufferConverter(attrs).asScala().toSeq());
}