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Binlog compressed

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Add some event types for the compressed event, there are:
     QUERY_COMPRESSED_EVENT,
     WRITE_ROWS_COMPRESSED_EVENT_V1,
     UPDATE_ROWS_COMPRESSED_EVENT_V1,
     DELETE_POWS_COMPRESSED_EVENT_V1,
     WRITE_ROWS_COMPRESSED_EVENT,
     UPDATE_ROWS_COMPRESSED_EVENT,
     DELETE_POWS_COMPRESSED_EVENT.
These events inheritance the uncompressed editor events. One of their constructor functions and write
function have been overridden for uncompressing and compressing. Anything but this is totally the same.

On slave, The IO thread will uncompress and convert them When it receiving the events from the master.
So the SQL and worker threads can be stay unchanged.

Now we use zlib as compress algorithm. It maybe support other algorithm in the future.
This commit is contained in:
vinchen 2016-10-08 12:07:26 +08:00 • committed by Kristian Nielsen
commit 640051e06a
13 changed files with 797 additions and 39 deletions
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sql/share/errmsg-utf8.txt
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@ -7232,3 +7232,5 @@ ER_PARTITION_DEFAULT_ERROR
ukr "Припустимо мати тільки один DEFAULT розділ"
ER_REFERENCED_TRG_DOES_NOT_EXIST
eng "Referenced trigger '%s' for the given action time and event type does not exist"
ER_BINLOG_UNCOMPRESS_ERROR
eng "Uncompress the compressed binlog failed"