;;; ob-sql.el --- Babel Functions for SQL -*- lexical-binding: t; -*- ;; Copyright (C) 2009-2023 Free Software Foundation, Inc. ;; Author: Eric Schulte ;; Maintainer: Daniel Kraus ;; Keywords: literate programming, reproducible research ;; URL: 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 . ;;; 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 ;; - dbconnection (to reference connections in sql-connection-alist) ;; - dbinstance (currently only used by SAP HANA) ;; - 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 (postgres) ;; - oracle ;; - vertica ;; - saphana ;; ;; TODO: ;; ;; - support for sessions ;; - support for more engines ;; - what's a reasonable way to drop table data into SQL? ;; ;;; Code: (require 'org-macs) (org-assert-version) (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)) (declare-function sql-set-product "sql" (product)) (defvar sql-connection-alist) (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) (dbinstance . :any) (database . :any)) "SQL-specific header arguments.") (defun org-babel-expand-body:sql (body params) "Expand BODY according to the values of PARAMS." (let ((prologue (cdr (assq :prologue params))) (epilogue (cdr (assq :epilogue params)))) (mapconcat 'identity (list prologue (org-babel-sql-expand-vars body (org-babel--get-vars params)) epilogue) "\n"))) (defun org-babel-edit-prep:sql (info) "Set `sql-product' in Org edit buffer. Set `sql-product' in Org edit buffer according to the corresponding :engine source block header argument." (let ((product (cdr (assq :engine (nth 2 info))))) (condition-case nil (sql-set-product product) (user-error "Cannot set `sql-product' in Org Src edit buffer")))) (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 arguments for database connection. If HOST and PORT are nil then don't pass them. This allows you to use names defined in your \"TNSNAMES\" file. So you can connect with /@:/ or /@ using its alias." (cond ((and user password database host port) (format "%s/%s@%s:%s/%s" user password host port database)) ((and user password database) (format "%s/%s@%s" user password database)) (t (user-error "Missing information to connect to 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-dbstring-saphana (host port instance user password database) "Make SAP HANA command line args for database connection. Pass nil to omit that arg." (mapconcat #'identity (delq nil (list (and host port (format "-n %s:%s" host port)) (and host (not port) (format "-n %s" host)) (and instance (format "-i %d" instance)) (and user (format "-u %s" user)) (and password (format "-p %s" (shell-quote-argument password))) (and 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-find-db-connection-param (params name) "Return database connection parameter NAME. Given a parameter NAME, if :dbconnection is defined in PARAMS then look for the parameter into the corresponding connection defined in `sql-connection-alist', otherwise look into PARAMS. See `sql-connection-alist' (part of SQL mode) for how to define database connections." (or (cdr (assq name params)) (and (assq :dbconnection params) (let* ((dbconnection (cdr (assq :dbconnection params))) (name-mapping '((:dbhost . sql-server) (:dbport . sql-port) (:dbuser . sql-user) (:dbpassword . sql-password) (:dbinstance . sql-dbinstance) (:database . sql-database) (:engine . sql-product))) (mapped-name (cdr (assq name name-mapping)))) (if (string-equal ":engine" name) (symbol-name (cadr (cadr (assq mapped-name (cdr (assoc-string dbconnection sql-connection-alist t)))))) (cadr (assq mapped-name (cdr (assoc-string dbconnection sql-connection-alist t))))))))) (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 (org-babel-find-db-connection-param params :dbhost)) (dbport (org-babel-find-db-connection-param params :dbport)) (dbuser (org-babel-find-db-connection-param params :dbuser)) (dbpassword (org-babel-find-db-connection-param params :dbpassword)) (dbinstance (org-babel-find-db-connection-param params :dbinstance)) (database (org-babel-find-db-connection-param params :database)) (engine (org-babel-find-db-connection-param params :engine)) (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 (cl-case (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 postgres) (format "%s%s --set=\"ON_ERROR_STOP=1\" %s -A -P \ footer=off -F \"\t\" %s -f %s -o %s %s" (if dbpassword (format "PGPASSWORD=%s " dbpassword) "") (or (bound-and-true-p sql-postgres-program) "psql") (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))) (saphana (format "hdbsql %s -I %s -o %s %s" (org-babel-sql-dbstring-saphana dbhost dbport dbinstance dbuser dbpassword database) (org-babel-process-file-name in-file) (org-babel-process-file-name out-file) (or cmdline ""))) (t (user-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 TRIMOUT ON TRIMSPOOL ON 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 postgres saphana 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 &optional sqlite) "Expand the variables held in VARS in BODY. If SQLITE has been provided, prevent passing a format to `orgtbl-to-csv'. This prevents overriding the default format, which if there were commas in the context of the table broke the table as an argument mechanism." (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 (if sqlite nil '(: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