ob-sql: Fix `case' calls

* lisp/ob-sql.el (org-babel-execute:sql): Replace erroneous `case' call
  with `pcase'.  Small refactoring.  Keep lines within 80 characters.

lisp/ob-sql.el

@@ -119,45 +119,48 @@ This function is called by `org-babel-execute-src-block'."
          (out-file (or (cdr (assoc :out-file params))
                        (org-babel-temp-file "sql-out-")))
 	 (header-delim "")
-         (command (case (intern engine)
-                    ('dbi (format "dbish --batch %s < %s | sed '%s' > %s"
+         (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)))
-                    ('msosql (format "osql %s -s \"\t\" -i %s -o %s"
-                                     (or cmdline "")
-                                     (org-babel-process-file-name in-file)
-                                     (org-babel-process-file-name out-file)))
-                    ('mysql (format "mysql %s %s %s < %s > %s"
+                    (`monetdb (format "mclient -f tab %s < %s > %s"
+				      (or cmdline "")
+				      (org-babel-process-file-name in-file)
+				      (org-babel-process-file-name out-file)))
+                    (`msosql (format "osql %s -s \"\t\" -i %s -o %s"
+				     (or cmdline "")
+				     (org-babel-process-file-name in-file)
+				     (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 "")
+				    (or cmdline "")
 				    (org-babel-process-file-name in-file)
 				    (org-babel-process-file-name out-file)))
-		    ('postgresql (format
-				  "psql --set=\"ON_ERROR_STOP=1\" %s -A -P footer=off -F \"\t\"  %s -f %s -o %s %s"
+		    (`postgresql (format
+				  "psql --set=\"ON_ERROR_STOP=1\" %s -A -P \
+footer=off -F \"\t\"  %s -f %s -o %s %s"
 				  (if colnames-p "" "-t")
-				  (org-babel-sql-dbstring-postgresql dbhost dbuser database)
+				  (org-babel-sql-dbstring-postgresql
+				   dbhost dbuser 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)
+                    (`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)))
-                    (t (error "No support for the %s SQL engine" engine)))))
+                    (_ (error "No support for the %s SQL engine" engine)))))
     (with-temp-file in-file
       (insert
-       (case (intern engine)
-	 ('dbi "/format partbox\n")
-         ('oracle "SET PAGESIZE 50000
+       (pcase (intern engine)
+	 (`dbi "/format partbox\n")
+         (`oracle "SET PAGESIZE 50000
 SET NEWPAGE 0
 SET TAB OFF
 SET SPACE 0
@@ -170,42 +173,40 @@ SET MARKUP HTML OFF SPOOL OFF
 SET COLSEP '|'
 
 ")
-	 (t ""))
+	 (_ ""))
        (org-babel-expand-body:sql body params)))
     (message command)
     (org-babel-eval command "")
     (org-babel-result-cond result-params
       (with-temp-buffer
-	  (progn (insert-file-contents-literally out-file) (buffer-string)))
+	(progn (insert-file-contents-literally out-file) (buffer-string)))
       (with-temp-buffer
 	(cond
-	  ((or (eq (intern engine) 'mysql)
-	       (eq (intern engine) 'dbi)
-	       (eq (intern engine) 'postgresql))
-	   ;; 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))))
+	 ((memq (intern engine) '(dbi myslq postgresql))
+	  ;; 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 '(16))
 	(org-babel-reassemble-table
 	 (mapcar (lambda (x)