xiarixiaoyao commented on a change in pull request #4910:
URL: https://github.com/apache/hudi/pull/4910#discussion_r830505261
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File path:
hudi-common/src/main/java/org/apache/hudi/common/table/log/AbstractHoodieLogRecordReader.java
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@@ -361,15 +372,38 @@ private boolean isNewInstantBlock(HoodieLogBlock
logBlock) {
*/
private void processDataBlock(HoodieDataBlock dataBlock,
Option<List<String>> keys) throws Exception {
try (ClosableIterator<IndexedRecord> recordItr =
dataBlock.getRecordItr(keys.orElse(Collections.emptyList()))) {
+ boolean headRecord = true;
+ Option<Schema> schemaOption = Option.empty();
while (recordItr.hasNext()) {
- IndexedRecord record = recordItr.next();
+ IndexedRecord currentRecord = recordItr.next();
+ if (headRecord) {
+ schemaOption = getMergedSchema(dataBlock, currentRecord);
+ headRecord = false;
+ }
+ IndexedRecord record = schemaOption.isPresent() ?
AvroSchemaUtil.rewriteRecord(currentRecord, schemaOption.get()) : currentRecord;
processNextRecord(createHoodieRecord(record,
this.hoodieTableMetaClient.getTableConfig(), this.payloadClassFQN,
this.preCombineField, this.withOperationField,
this.simpleKeyGenFields, this.partitionName));
totalLogRecords.incrementAndGet();
}
}
}
+ private Option<Schema> getMergedSchema(HoodieDataBlock dataBlock,
IndexedRecord record) {
Review comment:
added
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