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326 lines (195 loc) · 4.79 KB
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Hooks
=====
connect_server
--------------
read_auth
---------
read_auth_result
----------------
read_query
----------
read_query_result
-----------------
disconnect_client
-----------------
Modules
=======
mysql.proto
-----------
The ``mysql.proto`` module provides encoders and decoders for the packets exchanged between client and server
from_err_packet
...............
Decodes a ERR-packet into a table.
Parameters:
``packet``
(string) mysql packet
On success it returns a table containing:
``errmsg``
(string)
``sqlstate``
(string)
``errcode``
(int)
Otherwise it raises an error.
to_err_packet
.............
Encode a table containing a ERR packet into a MySQL packet.
Parameters:
``err``
(table)
``errmsg``
(string)
``sqlstate``
(string)
``errcode``
(int)
into a MySQL packet.
Returns a string.
from_ok_packet
..............
Decodes a OK-packet
``packet``
(string) mysql packet
On success it returns a table containing:
``server_status``
(int) bit-mask of the connection status
``insert_id``
(int) last used insert id
``warnings``
(int) number of warnings for the last executed statement
``affected_rows``
(int) rows affected by the last statement
Otherwise it raises an error.
to_ok_packet
............
Encode a OK packet
from_eof_packet
...............
Decodes a EOF-packet
Parameters:
``packet``
(string) mysql packet
On success it returns a table containing:
``server_status``
(int) bit-mask of the connection status
``warnings``
(int)
Otherwise it raises an error.
to_eof_packet
.............
from_challenge_packet
.....................
Decodes a auth-challenge-packet
Parameters:
``packet``
(string) mysql packet
On success it returns a table containing:
``protocol_version``
(int) version of the mysql protocol, usually 10
``server_version``
(int) version of the server as integer: 50506 is MySQL 5.5.6
``thread_id``
(int) connection id
``capabilities``
(int) bit-mask of the server capabilities
``charset``
(int) server default character-set
``server_status``
(int) bit-mask of the connection-status
``challenge``
(string) password challenge
to_challenge_packet
...................
Encode a auth-response-packet
from_response_packet
....................
Decodes a auth-response-packet
Parameters:
``packet``
(string) mysql packet
to_response_packet
..................
from_masterinfo_string
......................
Decodes the content of the ``master.info`` file.
to_masterinfo_string
....................
from_stmt_prepare_packet
........................
Decodes a COM_STMT_PREPARE-packet
Parameters:
``packet``
(string) mysql packet
On success it returns a table containing:
``stmt_text``
(string)
text of the prepared statement
Otherwise it raises an error.
from_stmt_prepare_ok_packet
...........................
Decodes a COM_STMT_PACKET OK-packet
Parameters:
``packet``
(string) mysql packet
On success it returns a table containing:
``stmt_id``
(int) statement-id
``num_columns``
(int) number of columns in the resultset
``num_params``
(int) number of parameters
``warnings``
(int) warnings generated by the prepare statement
Otherwise it raises an error.
from_stmt_execute_packet
........................
Decodes a COM_STMT_EXECUTE-packet
Parameters:
``packet``
(string) mysql packet
``num_params``
(int) number of parameters of the corresponding prepared statement
On success it returns a table containing:
``stmt_id``
(int) statemend-id
``flags``
(int) flags describing the kind of cursor used
``iteration_count``
(int) iteration count: always 1
``new_params_bound``
(bool)
``params``
(nil, table)
number-index array of parameters if ``new_params_bound`` is ``true``
Each param is a table of:
``type``
(int)
MYSQL_TYPE_INT, MYSQL_TYPE_STRING ... and so on
``value``
(nil, number, string)
if the value is a NULL, it ``nil``
if it is a number (_INT, _DOUBLE, ...) it is a ``number``
otherwise it is a ``string``
If decoding fails it raises an error.
To get the ``num_params`` for this function, you have to track the track the number of parameters as returned
by the `from_stmt_prepare_ok_packet`_. Use `stmt_id_from_stmt_execute_packet`_ to get the ``statement-id`` from
the COM_STMT_EXECUTE packet and lookup your tracked information.
stmt_id_from_stmt_execute_packet
................................
Decodes statement-id from a COM_STMT_EXECUTE-packet
Parameters:
``packet``
(string) mysql packet
On success it returns the ``statement-id`` as ``int``.
Otherwise it raises an error.
from_stmt_close_packet
......................
Decodes a COM_STMT_CLOSE-packet
Parameters:
``packet``
(string) mysql packet
On success it returns a table containing:
``stmt_id``
(int)
statement-id that shall be closed
Otherwise it raises an error.