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|
;;; ob-sql.el --- Babel Functions for SQL -*- lexical-binding: t; -*-
;; Copyright (C) 2009-2018 Free Software Foundation, Inc.
;; Author: Eric Schulte
;; Keywords: literate programming, reproducible research
;; Homepage: https://orgmode.org
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Org-Babel support for evaluating sql source code.
;; (see also ob-sqlite.el)
;;
;; SQL is somewhat unique in that there are many different engines for
;; the evaluation of sql (Mysql, PostgreSQL, etc...), so much of this
;; file will have to be implemented engine by engine.
;;
;; Also SQL evaluation generally takes place inside of a database.
;;
;; Header args used:
;; - engine
;; - cmdline
;; - dbhost
;; - dbport
;; - dbuser
;; - dbpassword
;; - database
;; - colnames (default, nil, means "yes")
;; - result-params
;; - out-file
;;
;; The following are used but not really implemented for SQL:
;; - colname-names
;; - rownames
;; - rowname-names
;;
;; Engines supported:
;; - mysql
;; - dbi
;; - mssql
;; - sqsh
;; - postgresql
;; - oracle
;; - vertica
;;
;; TODO:
;;
;; - support for sessions
;; - support for more engines
;; - what's a reasonable way to drop table data into SQL?
;;
;;; Code:
(require 'ob)
(declare-function org-table-import "org-table" (file arg))
(declare-function orgtbl-to-csv "org-table" (table params))
(declare-function org-table-to-lisp "org-table" (&optional txt))
(declare-function cygwin-convert-file-name-to-windows "cygw32.c" (file &optional absolute-p))
(defvar org-babel-default-header-args:sql '())
(defconst org-babel-header-args:sql
'((engine . :any)
(out-file . :any)
(dbhost . :any)
(dbport . :any)
(dbuser . :any)
(dbpassword . :any)
(database . :any))
"SQL-specific header arguments.")
(defun org-babel-expand-body:sql (body params)
"Expand BODY according to the values of PARAMS."
(org-babel-sql-expand-vars
body (org-babel--get-vars params)))
(defun org-babel-sql-dbstring-mysql (host port user password database)
"Make MySQL cmd line args for database connection. Pass nil to omit that arg."
(combine-and-quote-strings
(delq nil
(list (when host (concat "-h" host))
(when port (format "-P%d" port))
(when user (concat "-u" user))
(when password (concat "-p" password))
(when database (concat "-D" database))))))
(defun org-babel-sql-dbstring-postgresql (host port user database)
"Make PostgreSQL command line args for database connection.
Pass nil to omit that arg."
(combine-and-quote-strings
(delq nil
(list (when host (concat "-h" host))
(when port (format "-p%d" port))
(when user (concat "-U" user))
(when database (concat "-d" database))))))
(defun org-babel-sql-dbstring-oracle (host port user password database)
"Make Oracle command line args for database connection."
(format "%s/%s@%s:%s/%s" user password host port database))
(defun org-babel-sql-dbstring-mssql (host user password database)
"Make sqlcmd command line args for database connection.
`sqlcmd' is the preferred command line tool to access Microsoft
SQL Server on Windows and Linux platform."
(mapconcat #'identity
(delq nil
(list (when host (format "-S \"%s\"" host))
(when user (format "-U \"%s\"" user))
(when password (format "-P \"%s\"" password))
(when database (format "-d \"%s\"" database))))
" "))
(defun org-babel-sql-dbstring-sqsh (host user password database)
"Make sqsh command line args for database connection.
\"sqsh\" is one method to access Sybase or MS SQL via Linux platform"
(mapconcat #'identity
(delq nil
(list (when host (format "-S \"%s\"" host))
(when user (format "-U \"%s\"" user))
(when password (format "-P \"%s\"" password))
(when database (format "-D \"%s\"" database))))
" "))
(defun org-babel-sql-dbstring-vertica (host port user password database)
"Make Vertica command line args for database connection. Pass nil to omit that arg."
(mapconcat #'identity
(delq nil
(list (when host (format "-h %s" host))
(when port (format "-p %d" port))
(when user (format "-U %s" user))
(when password (format "-w %s" (shell-quote-argument password) ))
(when database (format "-d %s" database))))
" "))
(defun org-babel-sql-convert-standard-filename (file)
"Convert FILE to OS standard file name.
If in Cygwin environment, uses Cygwin specific function to
convert the file name. In a Windows-NT environment, do nothing.
Otherwise, use Emacs' standard conversion function."
(cond ((fboundp 'cygwin-convert-file-name-to-windows)
(format "%S" (cygwin-convert-file-name-to-windows file)))
((string= "windows-nt" system-type) file)
(t (format "%S" (convert-standard-filename file)))))
(defun org-babel-execute:sql (body params)
"Execute a block of Sql code with Babel.
This function is called by `org-babel-execute-src-block'."
(let* ((result-params (cdr (assq :result-params params)))
(cmdline (cdr (assq :cmdline params)))
(dbhost (cdr (assq :dbhost params)))
(dbport (cdr (assq :dbport params)))
(dbuser (cdr (assq :dbuser params)))
(dbpassword (cdr (assq :dbpassword params)))
(database (cdr (assq :database params)))
(engine (cdr (assq :engine params)))
(colnames-p (not (equal "no" (cdr (assq :colnames params)))))
(in-file (org-babel-temp-file "sql-in-"))
(out-file (or (cdr (assq :out-file params))
(org-babel-temp-file "sql-out-")))
(header-delim "")
(command (pcase (intern engine)
(`dbi (format "dbish --batch %s < %s | sed '%s' > %s"
(or cmdline "")
(org-babel-process-file-name in-file)
"/^+/d;s/^|//;s/(NULL)/ /g;$d"
(org-babel-process-file-name out-file)))
(`monetdb (format "mclient -f tab %s < %s > %s"
(or cmdline "")
(org-babel-process-file-name in-file)
(org-babel-process-file-name out-file)))
(`mssql (format "sqlcmd %s -s \"\t\" %s -i %s -o %s"
(or cmdline "")
(org-babel-sql-dbstring-mssql
dbhost dbuser dbpassword database)
(org-babel-sql-convert-standard-filename
(org-babel-process-file-name in-file))
(org-babel-sql-convert-standard-filename
(org-babel-process-file-name out-file))))
(`mysql (format "mysql %s %s %s < %s > %s"
(org-babel-sql-dbstring-mysql
dbhost dbport dbuser dbpassword database)
(if colnames-p "" "-N")
(or cmdline "")
(org-babel-process-file-name in-file)
(org-babel-process-file-name out-file)))
(`postgresql (format
"%spsql --set=\"ON_ERROR_STOP=1\" %s -A -P \
footer=off -F \"\t\" %s -f %s -o %s %s"
(if dbpassword
(format "PGPASSWORD=%s " dbpassword)
"")
(if colnames-p "" "-t")
(org-babel-sql-dbstring-postgresql
dbhost dbport dbuser database)
(org-babel-process-file-name in-file)
(org-babel-process-file-name out-file)
(or cmdline "")))
(`sqsh (format "sqsh %s %s -i %s -o %s -m csv"
(or cmdline "")
(org-babel-sql-dbstring-sqsh
dbhost dbuser dbpassword database)
(org-babel-sql-convert-standard-filename
(org-babel-process-file-name in-file))
(org-babel-sql-convert-standard-filename
(org-babel-process-file-name out-file))))
(`vertica (format "vsql %s -f %s -o %s %s"
(org-babel-sql-dbstring-vertica
dbhost dbport dbuser dbpassword database)
(org-babel-process-file-name in-file)
(org-babel-process-file-name out-file)
(or cmdline "")))
(`oracle (format
"sqlplus -s %s < %s > %s"
(org-babel-sql-dbstring-oracle
dbhost dbport dbuser dbpassword database)
(org-babel-process-file-name in-file)
(org-babel-process-file-name out-file)))
(_ (error "No support for the %s SQL engine" engine)))))
(with-temp-file in-file
(insert
(pcase (intern engine)
(`dbi "/format partbox\n")
(`oracle "SET PAGESIZE 50000
SET NEWPAGE 0
SET TAB OFF
SET SPACE 0
SET LINESIZE 9999
SET ECHO OFF
SET FEEDBACK OFF
SET VERIFY OFF
SET HEADING ON
SET MARKUP HTML OFF SPOOL OFF
SET COLSEP '|'
")
((or `mssql `sqsh) "SET NOCOUNT ON
")
(`vertica "\\a\n")
(_ ""))
(org-babel-expand-body:sql body params)
;; "sqsh" requires "go" inserted at EOF.
(if (string= engine "sqsh") "\ngo" "")))
(org-babel-eval command "")
(org-babel-result-cond result-params
(with-temp-buffer
(progn (insert-file-contents-literally out-file) (buffer-string)))
(with-temp-buffer
(cond
((memq (intern engine) '(dbi mysql postgresql sqsh vertica))
;; Add header row delimiter after column-names header in first line
(cond
(colnames-p
(with-temp-buffer
(insert-file-contents out-file)
(goto-char (point-min))
(forward-line 1)
(insert "-\n")
(setq header-delim "-")
(write-file out-file)))))
(t
;; Need to figure out the delimiter for the header row
(with-temp-buffer
(insert-file-contents out-file)
(goto-char (point-min))
(when (re-search-forward "^\\(-+\\)[^-]" nil t)
(setq header-delim (match-string-no-properties 1)))
(goto-char (point-max))
(forward-char -1)
(while (looking-at "\n")
(delete-char 1)
(goto-char (point-max))
(forward-char -1))
(write-file out-file))))
(org-table-import out-file (if (string= engine "sqsh") '(4) '(16)))
(org-babel-reassemble-table
(mapcar (lambda (x)
(if (string= (car x) header-delim)
'hline
x))
(org-table-to-lisp))
(org-babel-pick-name (cdr (assq :colname-names params))
(cdr (assq :colnames params)))
(org-babel-pick-name (cdr (assq :rowname-names params))
(cdr (assq :rownames params))))))))
(defun org-babel-sql-expand-vars (body vars)
"Expand the variables held in VARS in BODY."
(mapc
(lambda (pair)
(setq body
(replace-regexp-in-string
(format "$%s" (car pair))
(let ((val (cdr pair)))
(if (listp val)
(let ((data-file (org-babel-temp-file "sql-data-")))
(with-temp-file data-file
(insert (orgtbl-to-csv
val '(:fmt (lambda (el) (if (stringp el)
el
(format "%S" el)))))))
data-file)
(if (stringp val) val (format "%S" val))))
body)))
vars)
body)
(defun org-babel-prep-session:sql (_session _params)
"Raise an error because Sql sessions aren't implemented."
(error "SQL sessions not yet implemented"))
(provide 'ob-sql)
;;; ob-sql.el ends here
|
