OK_Packet
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OK_Packet
OK_Packet is sent by the server to the client and indicates a successful completion of a command sent by the client before.
Direction
Server to client.
Fields
- int<1> 0x00 : OK_Packet header
- int<lenenc> affected rows
- int<lenenc> last insert id
- int<2> status flags
- int<2> warning count
- if (session_tracking_supported)
- string<lenenc> info
- if (status flags & SERVER_SESSION_STATE_CHANGED)
- string<lenenc> session state info
- string<lenenc> value of variable
- else
- string<EOF> info
- string<EOF> info
Status flag
| IN_TRANSACTION | 1 |
| AUTOCOMMIT | 2 |
| MORE_RESULTS_EXISTS | 8 |
| QUERY_NO_GOOD_INDEX_USED | 16 |
| QUERY_NO_INDEX_USED | 32 |
| CURSOR_EXISTS | 64 |
| LAST_ROW_SENT | 128 |
| DB_DROPPED | 1 << 8 |
| NO_BACKSLASH_ESCAPES | 1 << 9 |
| METADATA_CHANGED | 1 << 10 |
| QUERY_WAS_SLOW | 1 << 11 |
| PS_OUT_PARAMETERS | 1 << 12 |
| SERVER_STATUS_IN_TRANS_READONLY | 1 << 13 |
| SERVER_SESSION_STATE_CHANGED | 1 << 14 |
Session state info
- until packet has remaining data
- int<1> session change type
- string<lenenc> change data
Session change type
| 0 | SESSION_TRACK_SYSTEM_VARIABLES |
| 1 | SESSION_TRACK_SCHEMA |
| 2 | SESSION_TRACK_STATE_CHANGE |
| 3 | SESSION_TRACK_GTIDS |
| 4 | SESSION_TRACK_TRANSACTION_CHARACTERISTICS |
| 5 | SESSION_TRACK_TRANSACTION_STATE |
Notes
- Session tracking is supported from MariaDB 10.2. To determine if session tracking is enabled, check if the CLIENT_SESSION_TRACK flag is set in server_capabilities.
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