Because Impala is part of the ASF, it cannot contain any GPL code. https://www.apache.org/legal/resolved.html
"However, if the component is only needed for optional features, a project can provide the user with instructions on how to obtain and install the non-included work. Optional means that the component is not required for standard use of the product or for the product to achieve a desirable level of quality. The question to ask yourself in this situation is: 'Will the majority of users want to use my product without adding the optional components?'" As I understand it, this is the rule by which Impala can use https://github.com/cloudera/impala-lzo On Mon, Jun 12, 2017 at 8:30 AM, Tim Armstrong <[email protected]> wrote: > You would need to add a new codec to the Impala source tree. The codecs are > implemented in be/src/util/codec.h, be/src/util/compress.h and > be/src/util/decompress.h. There are a few other places you may need to > change. I would just "git grep -i gzip" to see how the gzip codec is > implemented. > > For compressed text files you would also need to add support to the > frontend, e.g. in > fe/src/main/java/org/apache/impala/catalog/HdfsCompression.java > > I'm also not sure if there are any licensing issues here since the XZ > library is GPL licensed. > > On Sat, Jun 10, 2017 at 5:41 PM, 孙清孟 <[email protected]> wrote: > >> I have added lzma codec (hadoop-xz) to parquet(modify the parquet-format >> and parquet-mr) for hive, and get a higher compression ratio. >> >> But how add a new codec for Impala? >>
