7 Commits

Author	SHA1	Message	Date
Denis Khalikov	cc1c3629c5	MCOL-987 Add LZ4 compression. ... * 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.	2021-07-06 18:04:37 +03:00
Roman Nozdrin	6f120d2637	MCOL-4328 MCS avoids chown() calls for files that are on S3 ... MCS now chowns created directories hierarchy not only files and immediate parent directories Minor changes to cpimport's help printout cpimport's -f option is now mandatory with mode 2	2020-10-09 11:02:31 +00:00
Roman Nozdrin	9dc33c4e82	Another try to cope with warnings under gcc 8.2.	2019-04-29 11:05:03 +03:00
Andrew Hutchings	01446d1e22	Reformat all code to coding standard	2017-10-26 17:18:17 +01:00
Andrew Hutchings	f586f3b46a	MCOL-423 Fixes to I_S tables ... Fixes the following: * Compression ratio calculation was incorrect * Possible issues due to system catalog thread ID usage * Compressed file size data count was leaking many FDs when the table wasn't compressed * Compressed file size data count was allocating random large amounts of RAM and then leaking it when the table wasn't compressed	2016-11-29 10:45:38 +00:00
Andrew Hutchings	3b1de94cd8	MCOL-406 Improved Information Schema ... * Add INFORMATION_SCHEMA.COLUMNSTORE_FILES which contains information about files * Remove file information from COLUMNSTORE_EXTENTS (due to above) * Hide columns with Object ID < 3000 (internal columns) * Fix bad calculation in data_size columns * Fix minor memory leak * Add compressedSize() function to IDBFileSystem to get the used file size for a compressed file * Add columnstore_info schema with utility stored procedures to access the information_schema tables	2016-11-23 22:11:26 +00:00
david hill	f6afc42dd0	the begginning	2016-01-06 14:08:59 -06:00