Xuwei Fu created PARQUET-2241: --------------------------------- Summary: ByteStreamSplitDecoder broken in presence of nulls Key: PARQUET-2241 URL: https://issues.apache.org/jira/browse/PARQUET-2241 Project: Parquet Issue Type: Bug Components: parquet-format Affects Versions: format-2.8.0 Reporter: Xuwei Fu Fix For: format-2.10.0
This problem is shown in this issue: [https://github.com/apache/arrow/issues/15173|https://github.com/apache/arrow/issues/15173Let] Let me talk about it briefly: * Encoder doesn't write "num_values" on Page payload for BYTE_STREAM_SPLIT, but using "num_values" as stride in BYTE_STREAM_SPLIT * When decoding, for DATA_PAGE_V2, it can now the num_values and num_nulls in the page, however, in DATA_PAGE_V1, without statistics, we should read def-levels and rep-levels to get the real num-of-values. And without the num-of-values, we aren't able to decode BYTE_STREAM_SPLIT correctly The bug-reproducing code is in the issue. -- This message was sent by Atlassian Jira (v8.20.10#820010)