[CONC-575] Support for (MySQL) zstd compression - Jira

Details

Type: Task
Status: Closed (View Workflow)
Priority: Major
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 3.3.0
Component/s: Protocol
Labels:
None

Description

ZStandard compression was added in MySQL 8.0 but is currently not supported by MariaDB Connector/C.

MySQL indicates ZStandard compression support by setting CLIENT_ZSTD_COMPRESSION flag (1UL << 26).

For using ZStandard compression the client set's CLIENT_ZSTD_COMPRESSION flag, instead of CLIENT_COMPRESS (=zlib compression) flag.
In addition to the capability flag, the client will send a 4 byte (unsigned integer) after connection attributes which specifies the compress level:

Client Handshake Response:

...

if (server_capabilities & CLIENT_CONNECT_ATTRS)

    int<lenenc> size of connection attributes

    while packet has remaining data

        string<lenenc> key

        string<lenenc> value

*NEW*

if (server_capabilities & CLIENT_ZSTD_COMPRESSION)

    int<4> compression level

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Activity

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Georg Richter created issue - 2022-01-13 07:57

Georg Richter made changes - 2022-01-13 07:58

Field	Original Value	New Value
Summary	Support for zstd compression	Support for (MySQL) zstd compression

Georg Richter made changes - 2022-01-13 07:58

Description

ZStandard compression was added in MySQL 8.0 but is currently not supported by MariaDB Connector/C.

MySQL indicates ZStandard compression support by setting CLIENT_ZSTD_COMPRESSION flag (1UL << 26).

For using ZStandard compression the client set's CLIENT_ZSTD_COMPRESSION flag, instead of CLIENT_COMPRESS (=zlib compression) flag.
In addition to the capability flag, the client will send a 4 byte (unsigned integer) after connection attributes which specifies the compress level:

*Client Handshake Response:*

{noformat}
if (server_capabilities & CLIENT_CONNECT_ATTRS)
    int<lenenc> size of connection attributes
    while packet has remaining data
        string<lenenc> key
        string<lenenc> value
if (server_capabilities & CLIENT_ZSTD_COMPRESSION)
    int<4> compression level
{noformat}

ZStandard compression was added in MySQL 8.0 but is currently not supported by MariaDB Connector/C.

MySQL indicates ZStandard compression support by setting CLIENT_ZSTD_COMPRESSION flag (1UL << 26).

For using ZStandard compression the client set's CLIENT_ZSTD_COMPRESSION flag, instead of CLIENT_COMPRESS (=zlib compression) flag.
In addition to the capability flag, the client will send a 4 byte (unsigned integer) after connection attributes which specifies the compress level:

*Client Handshake Response:*

{noformat}
...
if (server_capabilities & CLIENT_CONNECT_ATTRS)
    int<lenenc> size of connection attributes
    while packet has remaining data
        string<lenenc> key
        string<lenenc> value
*NEW*
if (server_capabilities & CLIENT_ZSTD_COMPRESSION)
    int<4> compression level
{noformat}

Georg Richter made changes - 2022-01-25 04:04

Resolution		Fixed [ 1 ]
Status	Open [ 1 ]	Closed [ 6 ]

People

Assignee:: Georg Richter

Reporter:: Georg Richter

Votes:: 0 Vote for this issue

Watchers:: 2 Start watching this issue

Dates

Created:: 2022-01-13 07:57

Updated:: 2022-01-25 04:04

Resolved:: 2022-01-25 04:04

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