danny0405 commented on code in PR #11914:
URL: https://github.com/apache/hudi/pull/11914#discussion_r1769517298
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hudi-hadoop-mr/src/main/java/org/apache/hudi/hadoop/hive/HoodieCombineHiveInputFormat.java:
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@@ -375,6 +388,38 @@ public InputSplit[] getSplits(JobConf job, int numSplits)
throws IOException {
// clear work from ThreadLocal after splits generated in case of thread is
reused in pool.
Utilities.clearWorkMapForConf(job);
+ // build internal schema for the query
+ if (result.size() > 0) {
+ ArrayList<String> uniqTablePaths = new ArrayList<>();
+ Arrays.stream(paths).forEach(path -> {
+ HoodieStorage storage = null;
+ try {
+ storage = new HoodieHadoopStorage(path.getFileSystem(job));
+ Option<StoragePath> tablePath = TablePathUtils.getTablePath(storage,
HadoopFSUtils.convertToStoragePath(path));
+ if (tablePath.isPresent()) {
+ uniqTablePaths.add(tablePath.get().toUri().toString());
+ }
+ } catch (IOException e) {
+ throw new RuntimeException(e);
+ }
+ });
+
+ try {
+ for (String path : uniqTablePaths) {
+ HoodieTableMetaClient metaClient =
HoodieTableMetaClient.builder().setBasePath(path).setConf(new
HadoopStorageConfiguration(job)).build();
+ TableSchemaResolver schemaUtil = new TableSchemaResolver(metaClient);
+ Option<InternalSchema> schema =
schemaUtil.getTableInternalSchemaFromCommitMetadata();
+ if (schema.isPresent()) {
+ LOG.info("Set internal schema and avro schema of path: " +
path.toString());
+ job.set(INTERNAL_SCHEMA_CACHE_KEY_PREFIX + "." + path,
SerDeHelper.toJson(schema.get()));
+ job.set(SCHEMA_CACHE_KEY_PREFIX + "." + path,
schemaUtil.getTableAvroSchema().toString());
Review Comment:
We cache the schema by path or by table name? The table name looks more
straight-forward. And the schemaUtil.getTableAvroSchema() should be invoked
first to set up the commit metadata cache to avoid redundant commit metadata
deserialization.
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