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MCOL-987 Add LZ4 compression.

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* Adds CompressInterfaceLZ4 which uses LZ4 API for compress/uncompress.
* Adds CMake machinery to search LZ4 on running host.
* All methods which use static data and do not modify any internal data - become `static`,
  so we can use them without creation of the specific object. This is possible, because
  the header specification has not been modified. We still use 2 sections in header, first
  one with file meta data, the second one with pointers for compressed chunks.
* Methods `compress`, `uncompress`, `maxCompressedSize`, `getUncompressedSize` - become
  pure virtual, so we can override them for the other compression algos.
* Adds method `getChunkMagicNumber`, so we can verify chunk magic number
  for each compression algo.
* Renames "s/IDBCompressInterface/CompressInterface/g" according to requirement.
This commit is contained in:
Denis Khalikov
2021-04-01 17:26:38 +03:00
parent dd12bd3cd0
commit cc1c3629c5
45 changed files with 1311 additions and 549 deletions
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4
dbcon/joblist/pcolstep.cpp
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@ -146,9 +146,7 @@ pColStep::pColStep(
if (fOid < 1000)
throw runtime_error("pColStep: invalid column");
compress::IDBCompressInterface cmpif;
if (!cmpif.isCompressionAvail(fColType.compressionType))
if (!compress::CompressInterface::isCompressionAvail(fColType.compressionType))
{
ostringstream oss;
oss << "Unsupported compression type " << fColType.compressionType;