omalley commented on a change in pull request #652:
URL: https://github.com/apache/orc/pull/652#discussion_r598019072
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File path: java/core/src/java/org/apache/orc/impl/InStream.java
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@@ -397,13 +397,14 @@ public String toString() {
}
}
- private static class CompressedStream extends InStream {
+ static class CompressedStream extends InStream {
private final int bufferSize;
private ByteBuffer uncompressed;
private final CompressionCodec codec;
protected ByteBuffer compressed;
protected DiskRangeList currentRange;
private boolean isUncompressedOriginal;
+ protected long currentCompressedStart;
Review comment:
This should be initialized to -1 so that we don't have someone seek to 0
and get incorrect data.
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File path: java/core/src/test/org/apache/orc/impl/TestInStream.java
##########
@@ -19,6 +19,9 @@
package org.apache.orc.impl;
Review comment:
It would be nice to have a test case for blocks that used the original
bytes (header.isOriginal).
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File path: java/core/src/java/org/apache/orc/impl/InStream.java
##########
@@ -551,15 +556,20 @@ public void changeIv(Consumer<byte[]> modifier) {
@Override
public void seek(PositionProvider index) throws IOException {
- seek(index.getNext());
+ boolean seeked = seek(index.getNext());
long uncompressedBytes = index.getNext();
- if (uncompressedBytes != 0) {
- readHeader();
- uncompressed.position(uncompressed.position() +
- (int) uncompressedBytes);
- } else if (uncompressed != null) {
- // mark the uncompressed buffer as done
- uncompressed.position(uncompressed.limit());
+ if (!seeked && uncompressed != null) {
Review comment:
Can we get into the case of !seeked && uncompressed == null? I suspect
not, but this code would probably be doing the wrong thing by ignoring the case.
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