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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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10
writeengine/wrapper/we_colopcompress.cpp
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@ -121,9 +121,9 @@ int ColumnOpCompress0::saveBlock(IDBDataFile* pFile, const unsigned char* writeB
* Constructor
*/
ColumnOpCompress1::ColumnOpCompress1(Log* logger)
ColumnOpCompress1::ColumnOpCompress1(uint32_t compressionType, Log* logger)
{
m_compressionType = 1;
m_compressionType = compressionType;
m_chunkManager = new ChunkManager();
if (logger)
@ -164,11 +164,7 @@ bool ColumnOpCompress1::abbreviatedExtent(IDBDataFile* pFile, int colWidth) cons
int ColumnOpCompress1::blocksInFile(IDBDataFile* pFile) const
{
CompFileHeader compFileHeader;
readHeaders(pFile, compFileHeader.fControlData, compFileHeader.fPtrSection);
compress::IDBCompressInterface compressor;
return compressor.getBlockCount(compFileHeader.fControlData);
return m_chunkManager->getBlockCount(pFile);
}