host.c

local mysql = require('luamysql')

dbarg = {
    host = "127.0.0.1", -- required
    port = 3306, -- required
    user = "ouonline", -- optional
    password = "foobar", -- optional
    db = "test", -- optional
}

-------------------------------------------------------------------------------

client, errmsg = mysql.newclient(dbarg)
if errmsg ~= nil then
    io.write("connect to mysql error: ", errmsg, "\n")
    return
end

errmsg = client:selectdb(dbarg.db)
if errmsg ~= nil then
    io.write("selectdb error: ", errmsg, "\n")
    return
end

errmsg = client:setcharset("utf8")
if errmsg ~= nil then
    io.write("setcharset error: ", errmsg, "\n")
    return
end

errmsg = client:ping()
if errmsg ~= nil then
    io.write("ping: ", errmsg, "\n")
    return
end

result, errmsg = client:escape("'ouonline'")
if errmsg ~= nil then
    io.write("escape error: ", errmsg, "\n")
    return
end
io.write("excape string -> ", result, "\n")

result, errmsg = client:query("select * from test")
if errmsg ~= nil then
    io.write("query error: ", errmsg, "\n")
    return
end

io.write("result size = ", result:size(), "\n")

fieldnamelist = result:fieldnamelist()
if fieldnamelist == nil then
    io.write("get fieldnamelist error.\n")
    return
end

for record in result:recordlist() do
    io.write("--------------------------------\n")
    for k, v in pairs(record) do
        io.write("[", k, "] -> ", fieldnamelist[k], ": ", v, "\n")
    end
end