Performance Schema session_connect_attrs Table
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MariaDB starting with 10.0.5
The session_connect_attrs table was added in MariaDB 10.0 (along with many other new
Performance Schema tables).
Description
The session_connect_attrs table shows connection attributes for all sessions.
In MariaDB 10.0.5, applications can pass key/value connection attributes to the server when a connection is made. The session_connect_attrs and session_account_connect_attrs tables provide access to this information, for all sessions and the current session respectively.
The C API functions mysql_options() and mysql_optionsv() are used for passing connection attributes to the server.
session_connect_attrs contains the following columns:
| Column | Description |
|---|---|
PROCESSLIST_ID | Session connection identifier. |
ATTR_NAME | Attribute name. |
ATTR_VALUE | Attribute value. |
ORDINAL_POSITION | Order in which attribute was added to the connection attributes. |
Example
Returning the current connection's attributes:
SELECT * FROM performance_schema.session_connect_attrs WHERE processlist_id=CONNECTION_ID(); +----------------+-----------------+------------------+------------------+ | PROCESSLIST_ID | ATTR_NAME | ATTR_VALUE | ORDINAL_POSITION | +----------------+-----------------+------------------+------------------+ | 45 | _os | debian-linux-gnu | 0 | | 45 | _client_name | libmysql | 1 | | 45 | _pid | 7711 | 2 | | 45 | _client_version | 10.0.5 | 3 | | 45 | _platform | x86_64 | 4 | | 45 | program_name | mysql | 5 | +----------------+-----------------+------------------+------------------+
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