chenjunjiedada commented on a change in pull request #1266:
URL: https://github.com/apache/iceberg/pull/1266#discussion_r469699851
##########
File path:
flink/src/main/java/org/apache/iceberg/flink/data/FlinkParquetReaders.java
##########
@@ -19,64 +19,678 @@
package org.apache.iceberg.flink.data;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.nio.ByteBuffer;
import java.util.List;
-import org.apache.flink.types.Row;
+import java.util.Map;
+import org.apache.commons.lang3.ArrayUtils;
+import org.apache.flink.table.data.ArrayData;
+import org.apache.flink.table.data.DecimalData;
+import org.apache.flink.table.data.GenericRowData;
+import org.apache.flink.table.data.MapData;
+import org.apache.flink.table.data.RawValueData;
+import org.apache.flink.table.data.RowData;
+import org.apache.flink.table.data.StringData;
+import org.apache.flink.table.data.TimestampData;
import org.apache.iceberg.Schema;
-import org.apache.iceberg.data.parquet.BaseParquetReaders;
import org.apache.iceberg.parquet.ParquetValueReader;
import org.apache.iceberg.parquet.ParquetValueReaders;
+import org.apache.iceberg.parquet.TypeWithSchemaVisitor;
+import org.apache.iceberg.relocated.com.google.common.collect.ImmutableList;
+import org.apache.iceberg.relocated.com.google.common.collect.ImmutableMap;
+import org.apache.iceberg.relocated.com.google.common.collect.Lists;
+import org.apache.iceberg.relocated.com.google.common.collect.Maps;
import org.apache.iceberg.types.Types;
+import org.apache.parquet.column.ColumnDescriptor;
+import org.apache.parquet.io.api.Binary;
+import org.apache.parquet.schema.GroupType;
+import
org.apache.parquet.schema.LogicalTypeAnnotation.DecimalLogicalTypeAnnotation;
import org.apache.parquet.schema.MessageType;
+import org.apache.parquet.schema.PrimitiveType;
import org.apache.parquet.schema.Type;
-public class FlinkParquetReaders extends BaseParquetReaders<Row> {
+class FlinkParquetReaders {
+ private FlinkParquetReaders() {
+ }
- private static final FlinkParquetReaders INSTANCE = new
FlinkParquetReaders();
+ public static ParquetValueReader<RowData> buildReader(Schema expectedSchema,
MessageType fileSchema) {
+ return buildReader(expectedSchema, fileSchema, ImmutableMap.of());
+ }
- private FlinkParquetReaders() {
+ @SuppressWarnings("unchecked")
+ public static ParquetValueReader<RowData> buildReader(Schema expectedSchema,
+ MessageType fileSchema,
+ Map<Integer, ?>
idToConstant) {
+ return (ParquetValueReader<RowData>)
TypeWithSchemaVisitor.visit(expectedSchema.asStruct(), fileSchema,
+ new ReadBuilder(fileSchema, idToConstant)
+ );
+ }
+
+ private static class ReadBuilder extends
TypeWithSchemaVisitor<ParquetValueReader<?>> {
+ private final MessageType type;
+ private final Map<Integer, ?> idToConstant;
+
+ ReadBuilder(MessageType type, Map<Integer, ?> idToConstant) {
+ this.type = type;
+ this.idToConstant = idToConstant;
+ }
+
+ @Override
+ public ParquetValueReader<RowData> message(Types.StructType expected,
MessageType message,
+ List<ParquetValueReader<?>>
fieldReaders) {
+ return struct(expected, message.asGroupType(), fieldReaders);
+ }
+
+ @Override
+ public ParquetValueReader<RowData> struct(Types.StructType expected,
GroupType struct,
+ List<ParquetValueReader<?>>
fieldReaders) {
+ // match the expected struct's order
+ Map<Integer, ParquetValueReader<?>> readersById = Maps.newHashMap();
+ Map<Integer, Type> typesById = Maps.newHashMap();
+ List<Type> fields = struct.getFields();
+ for (int i = 0; i < fields.size(); i += 1) {
+ Type fieldType = fields.get(i);
+ int fieldD = type.getMaxDefinitionLevel(path(fieldType.getName())) - 1;
+ if (fieldType.getId() != null) {
+ int id = fieldType.getId().intValue();
+ readersById.put(id, ParquetValueReaders.option(fieldType, fieldD,
fieldReaders.get(i)));
+ typesById.put(id, fieldType);
+ }
+ }
+
+ List<Types.NestedField> expectedFields = expected != null ?
+ expected.fields() : ImmutableList.of();
+ List<ParquetValueReader<?>> reorderedFields =
Lists.newArrayListWithExpectedSize(
+ expectedFields.size());
+ List<Type> types =
Lists.newArrayListWithExpectedSize(expectedFields.size());
+ for (Types.NestedField field : expectedFields) {
+ int id = field.fieldId();
+ if (idToConstant.containsKey(id)) {
+ // containsKey is used because the constant may be null
+
reorderedFields.add(ParquetValueReaders.constant(idToConstant.get(id)));
+ types.add(null);
+ } else {
+ ParquetValueReader<?> reader = readersById.get(id);
+ if (reader != null) {
+ reorderedFields.add(reader);
+ types.add(typesById.get(id));
+ } else {
+ reorderedFields.add(ParquetValueReaders.nulls());
+ types.add(null);
+ }
+ }
+ }
+
+ return new RowDataReader(types, reorderedFields);
+ }
+
+ @Override
+ public ParquetValueReader<?> list(Types.ListType expectedList, GroupType
array,
+ ParquetValueReader<?> elementReader) {
+ GroupType repeated = array.getFields().get(0).asGroupType();
+ String[] repeatedPath = currentPath();
+
+ int repeatedD = type.getMaxDefinitionLevel(repeatedPath) - 1;
+ int repeatedR = type.getMaxRepetitionLevel(repeatedPath) - 1;
+
+ Type elementType = repeated.getType(0);
+ int elementD = type.getMaxDefinitionLevel(path(elementType.getName())) -
1;
+
+ return new ArrayReader<>(repeatedD, repeatedR,
ParquetValueReaders.option(elementType, elementD, elementReader));
+ }
+
+ @Override
+ public ParquetValueReader<?> map(Types.MapType expectedMap, GroupType map,
+ ParquetValueReader<?> keyReader,
+ ParquetValueReader<?> valueReader) {
+ GroupType repeatedKeyValue = map.getFields().get(0).asGroupType();
+ String[] repeatedPath = currentPath();
+
+ int repeatedD = type.getMaxDefinitionLevel(repeatedPath) - 1;
+ int repeatedR = type.getMaxRepetitionLevel(repeatedPath) - 1;
+
+ Type keyType = repeatedKeyValue.getType(0);
+ int keyD = type.getMaxDefinitionLevel(path(keyType.getName())) - 1;
+ Type valueType = repeatedKeyValue.getType(1);
+ int valueD = type.getMaxDefinitionLevel(path(valueType.getName())) - 1;
+
+ return new MapReader<>(repeatedD, repeatedR,
+ ParquetValueReaders.option(keyType, keyD, keyReader),
+ ParquetValueReaders.option(valueType, valueD, valueReader));
+ }
+
+ @Override
+ public ParquetValueReader<?>
primitive(org.apache.iceberg.types.Type.PrimitiveType expected,
+ PrimitiveType primitive) {
+ ColumnDescriptor desc = type.getColumnDescription(currentPath());
+
+ if (primitive.getOriginalType() != null) {
+ switch (primitive.getOriginalType()) {
+ case ENUM:
+ case JSON:
+ case UTF8:
+ return new StringReader(desc);
+ case INT_8:
+ case INT_16:
+ case INT_32:
+ if (expected != null && expected.typeId() ==
Types.LongType.get().typeId()) {
+ return new ParquetValueReaders.IntAsLongReader(desc);
+ } else {
+ return new ParquetValueReaders.UnboxedReader<>(desc);
+ }
+ case TIME_MICROS:
+ return new LossyMicrosToMillisTimeReader(desc);
+ case DATE:
+ case INT_64:
+ return new ParquetValueReaders.UnboxedReader<>(desc);
+ case TIMESTAMP_MICROS:
+ return new TimestampMicrosReader(desc);
+ case DECIMAL:
+ DecimalLogicalTypeAnnotation decimal =
(DecimalLogicalTypeAnnotation) primitive.getLogicalTypeAnnotation();
+ switch (primitive.getPrimitiveTypeName()) {
+ case BINARY:
+ case FIXED_LEN_BYTE_ARRAY:
+ return new BinaryDecimalReader(desc, decimal.getPrecision(),
decimal.getScale());
+ case INT64:
+ return new LongDecimalReader(desc, decimal.getPrecision(),
decimal.getScale());
+ case INT32:
+ return new IntegerDecimalReader(desc, decimal.getPrecision(),
decimal.getScale());
+ default:
+ throw new UnsupportedOperationException(
+ "Unsupported base type for decimal: " +
primitive.getPrimitiveTypeName());
+ }
+ case BSON:
+ return new ParquetValueReaders.ByteArrayReader(desc);
+ default:
+ throw new UnsupportedOperationException(
+ "Unsupported logical type: " + primitive.getOriginalType());
+ }
+ }
+
+ switch (primitive.getPrimitiveTypeName()) {
+ case FIXED_LEN_BYTE_ARRAY:
+ case BINARY:
+ return new ParquetValueReaders.ByteArrayReader(desc);
+ case INT32:
+ if (expected != null && expected.typeId() ==
org.apache.iceberg.types.Type.TypeID.LONG) {
+ return new ParquetValueReaders.IntAsLongReader(desc);
+ } else {
+ return new ParquetValueReaders.UnboxedReader<>(desc);
+ }
+ case FLOAT:
+ if (expected != null && expected.typeId() ==
org.apache.iceberg.types.Type.TypeID.DOUBLE) {
+ return new ParquetValueReaders.FloatAsDoubleReader(desc);
+ } else {
+ return new ParquetValueReaders.UnboxedReader<>(desc);
+ }
+ case BOOLEAN:
+ case INT64:
+ case DOUBLE:
+ return new ParquetValueReaders.UnboxedReader<>(desc);
+ default:
+ throw new UnsupportedOperationException("Unsupported type: " +
primitive);
+ }
+ }
+ }
+
+ private static class BinaryDecimalReader extends
ParquetValueReaders.PrimitiveReader<DecimalData> {
+ private final int precision;
+ private final int scale;
+
+ BinaryDecimalReader(ColumnDescriptor desc, int precision, int scale) {
+ super(desc);
+ this.precision = precision;
+ this.scale = scale;
+ }
+
+ @Override
+ public DecimalData read(DecimalData ignored) {
+ Binary binary = column.nextBinary();
+ BigDecimal bigDecimal = new BigDecimal(new
BigInteger(binary.getBytes()), scale);
+ // TODO: need a unit test to write-read-validate decimal via
FlinkParquetWrite/Reader
+ return DecimalData.fromBigDecimal(bigDecimal, precision, scale);
+ }
+ }
+
+ private static class IntegerDecimalReader extends
ParquetValueReaders.PrimitiveReader<DecimalData> {
+ private final int precision;
+ private final int scale;
+
+ IntegerDecimalReader(ColumnDescriptor desc, int precision, int scale) {
+ super(desc);
+ this.precision = precision;
+ this.scale = scale;
+ }
+
+ @Override
+ public DecimalData read(DecimalData ignored) {
+ return DecimalData.fromUnscaledLong(column.nextInteger(), precision,
scale);
+ }
}
- public static ParquetValueReader<Row> buildReader(Schema expectedSchema,
MessageType fileSchema) {
- return INSTANCE.createReader(expectedSchema, fileSchema);
+ private static class LongDecimalReader extends
ParquetValueReaders.PrimitiveReader<DecimalData> {
+ private final int precision;
+ private final int scale;
+
+ LongDecimalReader(ColumnDescriptor desc, int precision, int scale) {
+ super(desc);
+ this.precision = precision;
+ this.scale = scale;
+ }
+
+ @Override
+ public DecimalData read(DecimalData ignored) {
+ return DecimalData.fromUnscaledLong(column.nextLong(), precision, scale);
+ }
}
- @Override
- protected ParquetValueReader<Row> createStructReader(List<Type> types,
-
List<ParquetValueReader<?>> fieldReaders,
- Types.StructType
structType) {
- return new RowReader(types, fieldReaders, structType);
+ private static class TimestampMicrosReader extends
ParquetValueReaders.UnboxedReader<TimestampData> {
+ TimestampMicrosReader(ColumnDescriptor desc) {
+ super(desc);
+ }
+
+ @Override
+ public TimestampData read(TimestampData ignored) {
+ long micros = readLong();
+ return TimestampData.fromEpochMillis(Math.floorDiv(micros, 1_000),
+ (int) Math.floorMod(micros, 1_000) * 1_000);
+ }
+
+ @Override
+ public long readLong() {
+ return column.nextLong();
+ }
+ }
+
+ private static class StringReader extends
ParquetValueReaders.PrimitiveReader<StringData> {
+ StringReader(ColumnDescriptor desc) {
+ super(desc);
+ }
+
+ @Override
+ public StringData read(StringData ignored) {
+ Binary binary = column.nextBinary();
+ ByteBuffer buffer = binary.toByteBuffer();
+ if (buffer.hasArray()) {
+ return StringData.fromBytes(
+ buffer.array(), buffer.arrayOffset() + buffer.position(),
buffer.remaining());
+ } else {
+ return StringData.fromBytes(binary.getBytes());
+ }
+ }
+ }
+
+ private static class LossyMicrosToMillisTimeReader extends
ParquetValueReaders.PrimitiveReader<Integer> {
+ LossyMicrosToMillisTimeReader(ColumnDescriptor desc) {
+ super(desc);
+ }
+
+ @Override
+ public Integer read(Integer reuse) {
+ // Discard microseconds since Flink uses millisecond unit for TIME type.
+ return (int) Math.floorDiv(column.nextLong(), 1000);
+ }
+ }
+
+ private static class ArrayReader<E> extends
ParquetValueReaders.RepeatedReader<ArrayData, ReusableArrayData, E> {
+ private int readPos = 0;
+ private int writePos = 0;
+
+ ArrayReader(int definitionLevel, int repetitionLevel,
ParquetValueReader<E> reader) {
+ super(definitionLevel, repetitionLevel, reader);
+ }
+
+ @Override
+ protected ReusableArrayData newListData(ArrayData reuse) {
+ this.readPos = 0;
+ this.writePos = 0;
+
+ if (reuse instanceof ReusableArrayData) {
+ return (ReusableArrayData) reuse;
+ } else {
+ return new ReusableArrayData();
+ }
+ }
+
+ @Override
+ @SuppressWarnings("unchecked")
+ protected E getElement(ReusableArrayData list) {
+ E value = null;
+ if (readPos < list.capacity()) {
+ value = (E) list.values[readPos];
+ }
+
+ readPos += 1;
+
+ return value;
+ }
+
+ @Override
+ protected void addElement(ReusableArrayData reused, E element) {
+ if (writePos >= reused.capacity()) {
+ reused.grow();
+ }
+
+ reused.values[writePos] = element;
+
+ writePos += 1;
+ }
+
+ @Override
+ protected ArrayData buildList(ReusableArrayData list) {
+ list.setNumElements(writePos);
+ return list;
+ }
+ }
+
+ private static class MapReader<K, V> extends
+ ParquetValueReaders.RepeatedKeyValueReader<MapData, ReusableMapData, K,
V> {
+ private int readPos = 0;
+ private int writePos = 0;
+
+ private final ParquetValueReaders.ReusableEntry<K, V> entry = new
ParquetValueReaders.ReusableEntry<>();
+ private final ParquetValueReaders.ReusableEntry<K, V> nullEntry = new
ParquetValueReaders.ReusableEntry<>();
+
+ MapReader(int definitionLevel, int repetitionLevel,
+ ParquetValueReader<K> keyReader, ParquetValueReader<V>
valueReader) {
+ super(definitionLevel, repetitionLevel, keyReader, valueReader);
+ }
+
+ @Override
+ protected ReusableMapData newMapData(MapData reuse) {
+ this.readPos = 0;
+ this.writePos = 0;
+
+ if (reuse instanceof ReusableMapData) {
+ return (ReusableMapData) reuse;
+ } else {
+ return new ReusableMapData();
+ }
+ }
+
+ @Override
+ @SuppressWarnings("unchecked")
+ protected Map.Entry<K, V> getPair(ReusableMapData map) {
+ Map.Entry<K, V> kv = nullEntry;
+ if (readPos < map.capacity()) {
+ entry.set((K) map.keys.values[readPos], (V)
map.values.values[readPos]);
+ kv = entry;
+ }
+
+ readPos += 1;
+
+ return kv;
+ }
+
+ @Override
+ protected void addPair(ReusableMapData map, K key, V value) {
+ if (writePos >= map.capacity()) {
+ map.grow();
+ }
+
+ map.keys.values[writePos] = key;
+ map.values.values[writePos] = value;
+
+ writePos += 1;
+ }
+
+ @Override
+ protected MapData buildMap(ReusableMapData map) {
+ map.setNumElements(writePos);
+ return map;
+ }
}
- private static class RowReader extends ParquetValueReaders.StructReader<Row,
Row> {
- private final Types.StructType structType;
+ private static class RowDataReader extends
ParquetValueReaders.StructReader<RowData, GenericRowData> {
+ private final int numFields;
- RowReader(List<Type> types, List<ParquetValueReader<?>> readers,
Types.StructType struct) {
+ RowDataReader(List<Type> types, List<ParquetValueReader<?>> readers) {
super(types, readers);
- this.structType = struct;
+ this.numFields = readers.size();
}
@Override
- protected Row newStructData(Row reuse) {
- if (reuse != null) {
- return reuse;
+ protected GenericRowData newStructData(RowData reuse) {
+ if (reuse instanceof GenericRowData) {
+ return (GenericRowData) reuse;
} else {
- return new Row(structType.fields().size());
+ return new GenericRowData(numFields);
}
}
@Override
- protected Object getField(Row row, int pos) {
- return row.getField(pos);
+ protected Object getField(GenericRowData intermediate, int pos) {
+ return intermediate.getField(pos);
+ }
+
+ @Override
+ protected RowData buildStruct(GenericRowData struct) {
+ return struct;
+ }
+
+ @Override
+ protected void set(GenericRowData row, int pos, Object value) {
+ row.setField(pos, value);
+ }
+
+ @Override
+ protected void setNull(GenericRowData row, int pos) {
+ row.setField(pos, null);
+ }
+
+ @Override
+ protected void setBoolean(GenericRowData row, int pos, boolean value) {
+ row.setField(pos, value);
+ }
+
+ @Override
+ protected void setInteger(GenericRowData row, int pos, int value) {
+ row.setField(pos, value);
+ }
+
+ @Override
+ protected void setLong(GenericRowData row, int pos, long value) {
+ row.setField(pos, value);
}
@Override
- protected Row buildStruct(Row row) {
- return row;
+ protected void setFloat(GenericRowData row, int pos, float value) {
+ row.setField(pos, value);
}
@Override
- protected void set(Row row, int pos, Object value) {
+ protected void setDouble(GenericRowData row, int pos, double value) {
row.setField(pos, value);
}
}
+
+ private static class ReusableMapData implements MapData {
Review comment:
Opened https://github.com/apache/iceberg/issues/1331.
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