difin commented on code in PR #3833:
URL: https://github.com/apache/hive/pull/3833#discussion_r1071406567
##########
ql/src/java/org/apache/hadoop/hive/ql/io/orc/encoded/EncodedTreeReaderFactory.java:
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@@ -224,7 +237,252 @@ private static void skipCompressedIndex(boolean
isCompressed, PositionProvider i
index.getNext();
}
- protected static class StringStreamReader extends StringTreeReader
+ public static class StringDictionaryTreeReaderHive extends TreeReader {
Review Comment:
This is added as a fix to many failed CI tests that happened without this
fix.
In more detail: Hive implements its own TreeReaderFactory. In ORC project,
ORC-1060 - "Reduce memory usage when vectorized reading dictionary string
encoding columns" introduced changes to StringDictionaryTreeReader which were
causing exceptions in Hive EncodedTreeReaderFactory when attempting to upgrade
to ORC 1.8.1. To handle that I added changes to Hive's EncodedTreeReaderFactory
to use StringDictionaryTreeReader version as without ORC-1060.
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