database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-08-08 11:22:35 +03:00
Code Activity

MDEV-11371 - column compression

Browse Source 
Storage engine independent support for column compression.

TINYBLOB, BLOB, MEDIUMBLOB, LONGBLOB, TINYTEXT, TEXT, MEDIUMTEXT, LONGTEXT,
VARCHAR and VARBINARY columns can be compressed.

New COMPRESSED column attribute added:
COMPRESSED[=<compression_method>]

System variables added:
column_compression_threshold
column_compression_zlib_level
column_compression_zlib_strategy
column_compression_zlib_wrap

Status variables added:
Column_compressions
Column_decompressions

Limitations:
- the only supported method currently is zlib
- CSV storage engine stores data uncompressed on-disk even if COMPRESSED
  attribute is present
- it is not possible to create indexes over compressed columns.
This commit is contained in:
Sergey Vojtovich
2017-04-24 17:54:18 +04:00
parent dd4e9cdded
commit fdc4779235
32 changed files with 2648 additions and 151 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
storage/mroonga/lib/mrn_multiple_column_key_codec.cpp
View File

@@ -518,6 +518,9 @@ namespace mrn {
*data_type = TYPE_BYTE_SEQUENCE;
*data_size = key_part->length;
break;
case MYSQL_TYPE_VARCHAR_COMPRESSED:
case MYSQL_TYPE_BLOB_COMPRESSED:
DBUG_ASSERT(0);
}
DBUG_VOID_RETURN;
}