Flyangz commented on a change in pull request #3271:
URL: https://github.com/apache/iceberg/pull/3271#discussion_r740192429
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File path: flink/src/main/java/org/apache/iceberg/flink/FlinkCatalog.java
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@@ -684,12 +713,139 @@ public void alterPartitionColumnStatistics(ObjectPath
tablePath, CatalogPartitio
@Override
public List<CatalogPartitionSpec> listPartitions(ObjectPath tablePath,
CatalogPartitionSpec partitionSpec)
+ throws TableNotExistException, TableNotPartitionedException,
CatalogException, PartitionSpecInvalidException {
+ Preconditions.checkNotNull(tablePath, "Table path cannot be null");
+ Preconditions.checkNotNull(partitionSpec, "CatalogPartitionSpec cannot be
null");
+
+ Table table = loadIcebergTable(tablePath);
+ ensurePartitionedTable(tablePath, table);
+ Optional<PartitionSpec> matchingPartitionSpec =
getMatchingPartitionSpec(partitionSpec, table.specs());
+ if (!matchingPartitionSpec.isPresent()) {
+ throw new PartitionSpecInvalidException(getName(),
+ table.specs().values().stream()
+ .map(spec -> spec.fields().stream()
+ .map(PartitionField::name)
+ .collect(Collectors.joining(",", "{", "}")))
+ .collect(Collectors.toList()),
+ tablePath, partitionSpec);
+ }
+
+ Types.StructType structType = matchingPartitionSpec.get().partitionType();
+ Expression partitionFilter = Expressions.alwaysTrue();
+ for (Map.Entry<String, String> specEntry :
partitionSpec.getPartitionSpec().entrySet()) {
+ String specName = specEntry.getKey();
+ String specValue = specEntry.getValue();
+ Type type = structType.fieldType(specName);
+ if (!FILTERS.containsKey(type.getClass())) {
+ throw new CatalogException(String.format("Failed to list partitions of
table %s. Occur unsupported type %s",
+ tablePath, type));
+ }
+ Expression filter = FILTERS.get(type.getClass()).apply(specName,
specValue);
+ partitionFilter = Expressions.and(partitionFilter, filter);
+ }
+
+ return getPartitions(table, tablePath, partitionFilter);
+ }
+
+ private List<CatalogPartitionSpec> getPartitions(Table table, ObjectPath
tablePath, Expression filter)
throws CatalogException {
- throw new UnsupportedOperationException();
+ TableScan scan = table.newScan().filter(filter);
+ Map<Integer, PartitionSpec> specs = table.specs();
+ Set<Map<String, Object>> setMap = Sets.newHashSet();
+ try (CloseableIterable<FileScanTask> tasks = scan.planFiles()) {
+ for (DataFile dataFile : CloseableIterable.transform(tasks,
FileScanTask::file)) {
+ Map<String, Object> map = Maps.newHashMap();
+ StructLike structLike = dataFile.partition();
+ PartitionSpec spec = specs.get(dataFile.specId());
+ for (int i = 0; i < structLike.size(); i++) {
+ String name = spec.fields().get(i).name();
+ map.put(name, getValue(spec.schema().findType(name), i, structLike));
+ }
+
+ setMap.add(map);
+ }
+ } catch (IOException e) {
+ throw new CatalogException(String.format("Failed to list partitions of
table %s", tablePath), e);
+ }
+
+ List<Map<String, Object>> list = Lists.newArrayList(setMap);
+ sortPartitions(list);
+ List<CatalogPartitionSpec> partitionSpecs =
Lists.newArrayListWithCapacity(list.size());
+ for (Map<String, Object> partitionMap : list) {
+ Map<String, String> partitions =
partitionMap.entrySet().stream().collect(Collectors.toMap(
+ Map.Entry::getKey,
+ e -> String.valueOf(e.getValue())
+ ));
+ partitionSpecs.add(new CatalogPartitionSpec(partitions));
+ }
+
+ return partitionSpecs;
+ }
+
+ /**
+ * Sort the partition map by the value
+ *
+ * @param list the partition list
+ */
+ @SuppressWarnings("unchecked")
+ private void sortPartitions(List<Map<String, Object>> list) {
+ list.sort((map1, map2) -> {
+ for (Map.Entry<String, Object> entry : map1.entrySet()) {
+ String key = entry.getKey();
+ Object value1 = entry.getValue();
+ Object value2 = map2.get(key);
+ if (value1 instanceof Comparable && value2 instanceof Comparable &&
!value1.equals(value2)) {
+ return ((Comparable<Object>) value1).compareTo(value2);
+ }
+ }
+
+ return 0;
+ });
+ }
+
+ private Object getValue(Type type, int index, StructLike structLike) {
+ if (type instanceof Types.DateType) {
+ return DateTimeUtil.dateFromDays(structLike.get(index, Integer.class));
+ } else if (type instanceof Types.TimeType) {
+ return DateTimeUtil.timeFromMicros(structLike.get(index, Long.class));
+ } else if (type instanceof Types.TimestampType) {
+ return DateTimeUtil.timestampFromMicros(structLike.get(index,
Long.class));
+ } else if (type instanceof Types.BinaryType) {
+ return new String(structLike.get(index, ByteBuffer.class).array());
Review comment:
Here is to make `ByteBuffer` readable(human string) in the final return
result, instead of something like [B@2cf93603 .
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