database/mariadb-columnstore-engine
1
0
Fork 0
mirror of https://github.com/mariadb-corporation/mariadb-columnstore-engine.git synced 2025-07-30 19:23:07 +03:00
Code Activity

MCOL-987 Add LZ4 compression.

Browse Source 
* 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
Download Patch File Download Diff File Expand all files Collapse all files

10
writeengine/shared/we_fileop.h
View File

@ -529,11 +529,11 @@ private:
FileOp(const FileOp& rhs);
FileOp& operator=(const FileOp& rhs);
int expandAbbrevColumnChunk( IDBDataFile* pFile,
const uint8_t* emptyVal,
int colWidth,
const compress::CompChunkPtr& chunkInPtr,
compress::CompChunkPtr& chunkOutPt);
int expandAbbrevColumnChunk(IDBDataFile* pFile, const uint8_t* emptyVal,
int colWidth,
const compress::CompChunkPtr& chunkInPtr,
compress::CompChunkPtr& chunkOutPt,
const char* hdrs = nullptr);
int initAbbrevCompColumnExtent(
IDBDataFile* pFile, uint16_t dbRoot, int nBlocks,