org-mode macros inside code blocks and using babel - emacs

Question

Inspired by this great post, I'm trying to use the combination of org-mode and babel for issuing queries to elasticsearch. For example, counting the number of entries in an index:
#+BEGIN_SRC sh
curl -XGET 'http://my.uri.example:8080/index/_count'
#+END_SRC
The above code can be evaluated using C-c C-c when the point is in the block.1
On the other hand, one can define macros in the org document. My question is: is it possible to define a macro
#+MACRO: live-db http://my.uri.example:8080
and rewrite the code block as follow:
#+BEGIN_SRC sh
curl -XGET '{{{live-db}}}/index/_count'
#+END_SRC
Out of the box, for me, it didn't work... It seems like babel is not expanding the macro before the evaluation of the block. Ideas?
Edit
Now, once I learned that I can use es-mode, I won't to fine tune my question. Consider the following two requests:
#+BEGIN_SRC es :url http://mu.uri.stage:8080
GET /users/_search?pretty
{
"query": {
"match_all":{}
}
}
#+END_SRC
and
#+BEGIN_SRC es :url http://mu.uri.live:8080
GET /users/_search?pretty
{
"query": {
"match_all":{}
}
}
#+END_SRC
They merely differ in the URL. I would like to define two macros:
#+MACRO staging http://my.uri.stage:8080
#+MACRO live http://my.uri.live:8080
and then use the macros as the variables of the blocks. Is it possible?
1 Make sure you enable the evaluation of sh. Add something like:
(org-babel-do-load-languages
'org-babel-load-languages
'((sh . t)))
to your .emacs.

Answer 1

macro expansion is not natively supported when executing code blocks, but the Noweb reference syntax which is supported is much more powerful.
However, I doubt that it will work using es-mode, since it passes the url in a header argument and not a variable.
This is a simple example for a sh code block:
#+name: staging
: http://my.uri.stage:8080
#+name: live
: http://my.uri.live:8080
#+name: test
#+begin_src sh :var url=staging
echo $url
#+end_src
#+call: test(live)
#+RESULTS:
: http://my.uri.live:8080
#+call: test(staging)
#+RESULTS:
: http://my.uri.stage:8080