88 lines
3.2 KiB
EmacsLisp
88 lines
3.2 KiB
EmacsLisp
;;; org-babel-sql.el --- org-babel functions for sql evaluation
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;; Copyright (C) 2009 Eric Schulte
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;; Author: Eric Schulte
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;; Keywords: literate programming, reproducible research
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;; Homepage: http://orgmode.org
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;; Version: 0.01
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;;; License:
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 3, or (at your option)
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;; any later version.
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;;
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;; Org-Babel support for evaluating sql source code.
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;;
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;; SQL is somewhat unique in that there are many different engines for
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;; the evaluation of sql (Mysql, PostgreSQL, etc...), so much of this
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;; file will have to be implemented engine by engine.
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;;
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;; Also SQL evaluation generally takes place inside of a database.
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;;
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;; For now lets just allow a generic ':cmdline' header argument.
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;;
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;; TODO:
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;;
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;; - support for sessions
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;; - add more useful header arguments (user, passwd, database, etc...)
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;; - support for more engines (currently only supports mysql)
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;; - what's a reasonable way to drop table data into SQL?
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;;
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;;; Code:
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(require 'org-babel)
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(org-babel-add-interpreter "sql")
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(add-to-list 'org-babel-tangle-langs '("sql" "sql"))
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(defun org-babel-expand-body:sql (body params &optional processed-params) body)
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(defun org-babel-execute:sql (body params)
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"Execute a block of Sql code with org-babel. This function is
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called by `org-babel-execute-src-block'."
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(message "executing Sql source code block")
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(let* ((result-params (split-string (or (cdr (assoc :results params)) "")))
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(cmdline (cdr (assoc :cmdline params)))
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(engine (cdr (assoc :engine params)))
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(in-file (make-temp-file "org-babel-sql-in"))
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(out-file (or (cdr (assoc :out-file params))
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(make-temp-file "org-babel-sql-out")))
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(command (case (intern engine)
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('mysql (format "mysql %s -e \"source %s\" > %s"
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(or cmdline "") in-file out-file))
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(t (error "no support for the %s sql engine")))))
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(with-temp-file in-file
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(insert (org-babel-expand-body:sql body params)))
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(message command)
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(shell-command command)
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(with-temp-buffer
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(org-table-import out-file nil)
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(org-babel-reassemble-table
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(org-table-to-lisp)
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(org-babel-pick-name (nth 4 processed-params) (cdr (assoc :colnames params)))
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(org-babel-pick-name (nth 5 processed-params) (cdr (assoc :rownames params)))))))
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(defun org-babel-prep-session:sql (session params)
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"Prepare SESSION according to the header arguments specified in PARAMS."
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(error "sql sessions not yet implemented"))
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(provide 'org-babel-sql)
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;;; org-babel-sql.el ends here
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