Hi..
I am happy that this year also mysql is participating in SOC.
I am interested in mysql development as part of SOC.
From the project Ideas page I found, *Adding Lua
<http://www.lua.org/>support to the
mysql command-line client *interesting.
I want to know more about this project.
and here is what I understood.
Please correct me If I am wrong and add if I'm missing something.
- *Purpose of the project:*
This gives more flexibility to the user by providing him a feature to
execute a program(written by him in lua)
I feel this feature serves the same purpose as Shell Scripting in Unix or
m-file programs in matlab.
SQL file is also an executable script, but it is just a QUERY language and
its not like a full fledged programming lanugage
and so there comes the need for proper programming environment and this
project is going to provide it.
since we are adding support of a programming language. It enables user to
build applications using this programming language
and hence it leads to the personalization of mysql interface.
- *Why only LUA*? :
LUA is proven to be fast,portable,small yet powerful and most importantly *
Embeddable*.
It is easy to extend Lua with libraries written in other languages.
It is also easy to extend programs written in other languages with Lua.
- *How it works?*
- user issues the command for lua script execution.
- lua interpreter will be invoked.(which is *lua.c* file as
mentioned in documentation of lua)
- while executing the script it builds the mysql command.
- and now we call the same functions of mysql library which are
called when that built command was directly given on command line client.
- So, ultimately here we are doing the same thing but prepending
the process with an additional step.
- (*This is just my understanding. **Please correct me if am
wrong. **)*
- *How this can be done?*
- firstly I should add a feature to command line client to invoke
interpreter when proper command for execution of lua script is given.
- next step is regarding Lua library and interpretation. The
library is available from Lua and Interpreter is also written by them
- It depends on us if we are willing to use their Interpreter of
write our own from scratch(I feel its useless to reinvent the wheel).
- In the interpreter we have to add functionality to hand over
the control to an intermediate(new) program(to be written).
- this new program maps the command command handed by
interpreter to the mysql functionality which is supposed to be executed.
- (*am I right?)*
*
*
- *Qualifications:*
- programming skills: c++,lua
- Idea of compilers.(how they work?)
- knowledge mysql command line client source.
1. Am I right? If not please correct me. and guide me to know it
better.
2. Kindly give me some keywords or reference which would help me in
knowing this better.
