lua mysql quickstart

    <p>Here is the tutorial to write and build Lua application that can communicate with MySQL database.</p>

Dependency Installation

At first, we need to install LuaRocks. Here is the tutorial.

We need to install dependency to access MySQL database through Lua. Execute the command to install dependency:

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luarocks install luasql-mysql MYSQL_INCDIR=/usr/include/mysql/

But default dependency miss some libraries or variables. In that case, we need to use different source:

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luarocks --from=http://rocks.luarocks.org/dev install luasql-mysql cvs-1 MYSQL_INCDIR=/usr/include/mysql

Sample Code

Below is the sample code to do MySQL query. The file name is mysql.lua:

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luasql = require "luasql.mysql"
env = assert (luasql.mysql())
con = assert (env:connect("database_name","user_name","password","host_ip",port))

print(env,con)

cur,errorString = con:execute([[select * from test;]])
print(cur,errorString )

row = cur:fetch ({}, "a")

while row do
    print(string.format("Id: %s ", row.id))
    row = cur:fetch (row, "a")
end

cur:close()
con:close()
env:close()

Then execute above lua script using following command:

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lua mysql.lua

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