pitrou commented on code in PR #38784:
URL: https://github.com/apache/arrow/pull/38784#discussion_r1400708489
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cpp/src/parquet/encoding.cc:
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@@ -1983,7 +1990,7 @@ class DictByteArrayDecoderImpl : public
DictDecoderImpl<ByteArrayType>,
int values_decoded = 0;
ArrowBinaryHelper<ByteArrayType> helper(out, num_values);
- RETURN_NOT_OK(helper.Prepare(len_));
+ RETURN_NOT_OK(helper.Prepare());
Review Comment:
I still don't understand why we don't want to presize here.... This can be
called for non-dict decoding, right?
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