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sql-mode backend for Org Babel
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ob-sql-mode is an alternative backend for Org-Babel SQL SRC blocks that uses sql-mode to evaluate the query instead of Org-Babel's built-in SQL backends.

The practical upshot of this is that you can use any backend that sql-mode supports, not just the ones that Org-Babel supports.

Also, unlike the sql backend, ob-sql-mode supports multiple different sessions within the same Org document.

Some familiarity with sql-mode is assumed.



ob-sql-mode is available on MELPA. If you are not already using MELPA, add this to your .emacs (or equivalent):

(require 'package)
(add-to-list 'package-archives
	         '("melpa" . ""))

and then evaluate that code.

You can then install ob-sql-mode with the following command:

M-x package-install [RET] ob-sql-mode [RET]

or by adding the following to your .emacs:

(unless (package-installed-p 'ob-sql-mode)
  (package-install 'ob-sql-mode))

or by using use-package:

(use-package ob-sql-mode
  :ensure t)

After installing, enable with:

(require 'ob-sql-mode)

To guard against security risks, Org defaults to prompting for confirmation every time you evaluate a code block (see Code evaluation and security issues for details). To disable this for ob-sql-mode blocks you can enter and evaluate the following.

(setq org-confirm-babel-evaluate
      (lambda (lang body)
        (not (string= lang "sql-mode"))))


Enter an Org SRC block that specifies sql-mode. For example:

#+BEGIN_SRC sql-mode
SELECT 1, 2, 3;

Then place the point within the block and press C-c C-c to evaluate it and have the results inserted in to the document.

Tip: To avoid writing this in full each time you can type <Q [TAB] to insert a pre-filled template (to use a key other than Q customize org-babel-sql-mode-template-selector).

Although all the statements in the block will be executed only the the results from executing the final statement will be returned.

Add a :product header argument to set the product to use. For example:

#+BEGIN_SRC sql-mode :product oracle

The product must be known to sql-mode (i.e., it must be in sql-product-alist).

All blocks that use the same product run in the same session. To change this add a :session header argument with a name for the session. Blocks that share a session name will be run in the same session.

Per Using header arguments in the Org manual you can set these on a per-file level with the following syntax:

#+PROPERTY: header-args:sql-mode :product sqlite
#+PROPERTY: header-args:sql-mode+ :session session-name

Or you can apply them to all blocks below a particular heading by adding a properties drawer to the heading with the following syntax:

** TODO Perform some queries to investigate some data
:header-args:sql-mode :product sqlite
:header-args:sql-mode+ :session session-name

#+BEGIN_SRC sql-mode
-- No :product or :session specified here, so the values from the
-- PROPERTIES drawer are used.
SELECT 1, 2, 3

To change the default product globally, customize org-babel-default-header-args:sql-mode.

See header commentary in the code for implementation notes and other options.


GPLv3, see the LICENSE file in the repository and the copyright statement in the code for further information.

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