viirya commented on code in PR #40043:
URL: https://github.com/apache/arrow/pull/40043#discussion_r1488754966
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java/vector/src/main/java/org/apache/arrow/vector/BaseVariableWidthVector.java:
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@@ -476,11 +507,12 @@ private void allocateBytes(final long valueBufferSize,
final int valueCount) {
}
/* allocate offset buffer */
- private void allocateOffsetBuffer(final long size) {
+ private ArrowBuf allocateOffsetBuffer(final long size) {
Review Comment:
> > I don't think an inconsistent offset (sometimes it is empty sometimes it
is one value buffer) is a good idea. Very confused and easy to cause bugs.
>
> Code shouldn't make assumptions because we've already documented that
those assumptions are wrong. It would be equally true for code working with
imported arrays: they may have a one value buffer.
Hmm, but this is the current code status...
You can see how these var-size vectors handle offset buffer, they assume
that the initial capacity of offset buffer is 0. That's why I got some many
test failure after I changed the initial offset buffer.
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