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--[[ $%BEGINLICENSE%$
Copyright (C) 2008 MySQL AB, 2008 Sun Microsystems, Inc
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
$%ENDLICENSE%$ --]]
---
-- map SQL commands to the hidden MySQL Protocol commands
--
-- some protocol commands are only available through the mysqladmin tool like
-- * ping
-- * shutdown
-- * debug
-- * statistics
--
-- ... while others are avaible
-- * process info (SHOW PROCESS LIST)
-- * process kill (KILL <id>)
--
-- ... and others are ignored
-- * time
--
-- that way we can test MySQL Servers more easily with "mysqltest"
--
---
-- recognize special SQL commands and turn them into COM_* sequences
--
function read_query(packet)
if packet:byte() ~= proxy.COM_QUERY then return end
if packet:sub(2) == "COMMIT SUICIDE" then
proxy.queries:append(proxy.COM_SHUTDOWN, string.char(proxy.COM_SHUTDOWN), { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "PING" then
proxy.queries:append(proxy.COM_PING, string.char(proxy.COM_PING), { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "STATISTICS" then
proxy.queries:append(proxy.COM_STATISTICS, string.char(proxy.COM_STATISTICS), { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "PROCINFO" then
proxy.queries:append(proxy.COM_PROCESS_INFO, string.char(proxy.COM_PROCESS_INFO), { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "TIME" then
proxy.queries:append(proxy.COM_TIME, string.char(proxy.COM_TIME), { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "DEBUG" then
proxy.queries:append(proxy.COM_DEBUG, string.char(proxy.COM_DEBUG), { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "PROCKILL" then
proxy.queries:append(proxy.COM_PROCESS_KILL, string.char(proxy.COM_PROCESS_KILL), { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "SETOPT" then
proxy.queries:append(proxy.COM_SET_OPTION, string.char(proxy.COM_SET_OPTION), { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "BINLOGDUMP" then
proxy.queries:append(proxy.COM_BINLOG_DUMP, string.char(proxy.COM_BINLOG_DUMP), { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "BINLOGDUMP1" then
proxy.queries:append(proxy.COM_BINLOG_DUMP,
string.char(proxy.COM_BINLOG_DUMP) ..
"\004\000\000\000" ..
"\000\000" ..
"\002\000\000\000" ..
"\000" ..
""
, { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "REGSLAVE" then
proxy.queries:append(proxy.COM_REGISTER_SLAVE, string.char(proxy.COM_REGISTER_SLAVE), { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "REGSLAVE1" then
proxy.queries:append(proxy.COM_REGISTER_SLAVE,
string.char(proxy.COM_REGISTER_SLAVE) ..
"\001\000\000\000" .. -- server-id
"\000" .. -- report-host
"\000" .. -- report-user
"\000" .. -- report-password ?
"\001\000" .. -- our port
"\000\000\000\000" .. -- recovery rank
"\001\000\000\000" .. -- master id ... what ever that is
""
, { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "PREP" then
proxy.queries:append(proxy.COM_STMT_PREPARE, string.char(proxy.COM_STMT_PREPARE), { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "PREP1" then
proxy.queries:append(proxy.COM_STMT_PREPARE, string.char(proxy.COM_STMT_PREPARE) .. "SELECT ?", { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "EXEC" then
proxy.queries:append(proxy.COM_STMT_EXECUTE, string.char(proxy.COM_STMT_EXECUTE), { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "EXEC1" then
proxy.queries:append(proxy.COM_STMT_EXECUTE,
string.char(proxy.COM_STMT_EXECUTE) ..
"\001\000\000\000" .. -- stmt-id
"\000" .. -- flags
"\001\000\000\000" .. -- iteration count
"\000" .. -- null-bits
"\001" .. -- new-parameters
"\000\254" ..
"\004" .. "1234" ..
"", { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "DEAL" then
proxy.queries:append(proxy.COM_STMT_CLOSE, string.char(proxy.COM_STMT_CLOSE), { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "DEAL1" then
proxy.queries:append(proxy.COM_STMT_CLOSE, string.char(proxy.COM_STMT_CLOSE) .. "\001\000\000\000", { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "RESET" then
proxy.queries:append(proxy.COM_STMT_RESET, string.char(proxy.COM_STMT_RESET), { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "RESET1" then
proxy.queries:append(proxy.COM_STMT_RESET, string.char(proxy.COM_STMT_RESET) .. "\001\000\000\000", { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "FETCH" then
proxy.queries:append(proxy.COM_STMT_FETCH, string.char(proxy.COM_STMT_FETCH), { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "FETCH1" then
proxy.queries:append(proxy.COM_STMT_FETCH, string.char(proxy.COM_STMT_FETCH) .. "\001\000\000\000" .. "\128\000\000\000", { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "FLIST" then
proxy.queries:append(proxy.COM_FIELD_LIST, string.char(proxy.COM_FIELD_LIST), { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "FLIST1" then
proxy.queries:append(proxy.COM_FIELD_LIST, string.char(proxy.COM_FIELD_LIST) .. "t1\000id\000\000\000", { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "TDUMP" then
proxy.queries:append(proxy.COM_TABLE_DUMP, string.char(proxy.COM_TABLE_DUMP), { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "TDUMP1" then
proxy.queries:append(proxy.COM_TABLE_DUMP, string.char(proxy.COM_TABLE_DUMP) .. "\004test\002t1", { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
elseif packet:sub(2) == "TDUMP2" then
proxy.queries:append(proxy.COM_TABLE_DUMP, string.char(proxy.COM_TABLE_DUMP) .. "\004test\002t2", { resultset_is_needed = true })
return proxy.PROXY_SEND_QUERY
end
end
---
-- adjust the response to match the needs of COM_QUERY
-- where neccesary
--
-- * some commands return EOF (COM_SHUTDOWN),
-- * some are plain-text (COM_STATISTICS)
--
-- in the end the client sent us a COM_QUERY and we have to hide
-- all those specifics
function read_query_result(inj)
if inj.id == proxy.COM_SHUTDOWN or
inj.id == proxy.COM_SET_OPTION or
inj.id == proxy.COM_BINLOG_DUMP or
inj.id == proxy.COM_STMT_PREPARE or
inj.id == proxy.COM_STMT_FETCH or
inj.id == proxy.COM_FIELD_LIST or
inj.id == proxy.COM_TABLE_DUMP or
inj.id == proxy.COM_DEBUG then
-- translate the EOF packet from the COM_SHUTDOWN into a OK packet
-- to match the needs of the COM_QUERY we got
if inj.resultset.raw:byte() ~= 255 then
proxy.response = {
type = proxy.MYSQLD_PACKET_OK,
}
return proxy.PROXY_SEND_RESULT
end
elseif inj.id == proxy.COM_PING or
inj.id == proxy.COM_TIME or
inj.id == proxy.COM_PROCESS_KILL or
inj.id == proxy.COM_REGISTER_SLAVE or
inj.id == proxy.COM_STMT_EXECUTE or
inj.id == proxy.COM_STMT_RESET or
inj.id == proxy.COM_PROCESS_INFO then
-- no change needed
elseif inj.id == proxy.COM_STATISTICS then
-- the response a human readable plain-text
--
-- just turn it into a proper result-set
proxy.response = {
type = proxy.MYSQLD_PACKET_OK,
resultset = {
fields = {
{ name = "statisitics" }
},
rows = {
{ inj.resultset.raw }
}
}
}
return proxy.PROXY_SEND_RESULT
else
-- we don't know them yet, just return ERR to the client to
-- match the needs of COM_QUERY
print(("got: %q"):format(inj.resultset.raw))
proxy.response = {
type = proxy.MYSQLD_PACKET_ERR,
}
return proxy.PROXY_SEND_RESULT
end
end
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