X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;f=sql%2Fexpressions.lisp;h=c7236a454f56cb4c4c08a102c4ee61381c162996;hb=8f46e0fa45fc54bccceb5a0e86f596dd8e480853;hp=746ed001ee608232be7f24e6f78d9591b62ac4bc;hpb=2a0e0fdaa59c9b431bad7ef35cab891f831a9d3b;p=clsql.git

diff --git a/sql/expressions.lisp b/sql/expressions.lisp
index 746ed00..c7236a4 100644
--- a/sql/expressions.lisp
+++ b/sql/expressions.lisp
@@ -1,8 +1,6 @@
 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
 ;;;; *************************************************************************
 ;;;;
-;;;; $Id$
-;;;;
 ;;;; Classes defining SQL expressions and methods for formatting the
 ;;;; appropriate SQL commands.
 ;;;;
@@ -194,15 +192,25 @@
     sql
     `(make-instance 'sql-ident-table :name ',name :table-alias ',alias)))
 
+(defun special-char-p (s)
+  "Check if a string has any special characters"
+  (loop for char across s
+       thereis (find char '(#\space #\, #\. #\! #\@ #\# #\$ #\%
+                                 #\^ #\& #\* #\| #\( #\) #\- #\+))))
+
 (defmethod output-sql ((expr sql-ident-table) database)
   (with-slots (name alias) expr
-    (etypecase name
-      (string
-       (format *sql-stream* "~s" (sql-escape name)))
-      (symbol
-       (write-string (sql-escape name) *sql-stream*)))
-    (when alias
-      (format *sql-stream* " ~s" alias)))
+    (flet ((p (s) ;; the etypecase is in sql-escape too
+	     (let ((sym? (symbolp s))
+		   (s (sql-escape s)))
+	       (format *sql-stream*
+		       (if (and sym? (not (special-char-p s)))
+			   "~a" "~s")
+		       s))))
+      (p name)
+      (when alias
+	(princ #\space *sql-stream*)
+	(p alias))))
   t)
 
 (defmethod output-sql-hash-key ((expr sql-ident-table) database)
@@ -242,19 +250,34 @@
 ;; should do arity checking of subexpressions
 
 (defmethod output-sql ((expr sql-relational-exp) database)
-  (with-slots (operator sub-expressions)
-    expr
-    (let ((subs (if (consp (car sub-expressions))
-                    (car sub-expressions)
-                    sub-expressions)))
-      (write-char #\( *sql-stream*)
-      (do ((sub subs (cdr sub)))
-          ((null (cdr sub)) (output-sql (car sub) database))
-        (output-sql (car sub) database)
-        (write-char #\Space *sql-stream*)
-        (output-sql operator database)
-        (write-char #\Space *sql-stream*))
-      (write-char #\) *sql-stream*)))
+  (with-slots (operator sub-expressions) expr
+     ;; we do this as two runs so as not to emit confusing superflous parentheses
+     ;; The first loop renders all the child outputs so that we can skip anding with
+     ;; empty output (which causes sql errors)
+     ;; the next loop simply emits each sub-expression with the appropriate number of
+     ;; parens and operators
+     (flet ((trim (sub)
+	      (string-trim +whitespace-chars+
+			   (with-output-to-string (*sql-stream*)
+			     (output-sql sub database)))))
+       (let ((str-subs (loop for sub in sub-expressions
+			     for str-sub = (trim sub)
+			   when (and str-sub (> (length str-sub) 0))
+			     collect str-sub)))
+	 (case (length str-subs)
+	   (0 nil)
+	   (1 (write-string (first str-subs) *sql-stream*))
+	   (t
+	      (write-char #\( *sql-stream*)
+	      (write-string (first str-subs) *sql-stream*)
+	      (loop for str-sub in (rest str-subs)
+		    do
+		 (write-char #\Space *sql-stream*)
+		 (output-sql operator database)
+		 (write-char #\Space *sql-stream*)
+		 (write-string str-sub *sql-stream*))
+	      (write-char #\) *sql-stream*))
+	   ))))
   t)
 
 (defclass sql-upcase-like (sql-relational-exp)
@@ -563,12 +586,16 @@ uninclusive, and the args from that keyword to the end."
     (when *in-subselect*
       (write-string "(" *sql-stream*))
     (write-string "SELECT " *sql-stream*)
+    (when (and limit (eql :mssql (database-underlying-type database)))
+      (write-string " TOP " *sql-stream*)
+      (output-sql limit database)
+      (write-string " " *sql-stream*))
     (when all
-      (write-string "ALL " *sql-stream*))
+      (write-string " ALL " *sql-stream*))
     (when (and distinct (not all))
-      (write-string "DISTINCT " *sql-stream*)
+      (write-string " DISTINCT " *sql-stream*)
       (unless (eql t distinct)
-        (write-string "ON " *sql-stream*)
+        (write-string " ON " *sql-stream*)
         (output-sql distinct database)
         (write-char #\Space *sql-stream*)))
     (let ((*in-subselect* t))
@@ -634,7 +661,7 @@ uninclusive, and the args from that keyword to the end."
               (when (cdr order)
                 (write-char #\, *sql-stream*))))
           (output-sql order-by database)))
-    (when limit
+    (when (and limit (not (eql :mssql (database-underlying-type database))))
       (write-string " LIMIT " *sql-stream*)
       (output-sql limit database))
     (when offset
@@ -774,9 +801,9 @@ uninclusive, and the args from that keyword to the end."
 
 (declaim (inline listify))
 (defun listify (x)
-  (if (atom x)
-      (list x)
-      x))
+  (if (listp x)
+      x
+      (list x)))
 
 (defmethod output-sql ((stmt sql-create-table) database)
   (flet ((output-column (column-spec)
@@ -967,7 +994,10 @@ uninclusive, and the args from that keyword to the end."
    (cons (symbol-name-default-case "UNSIGNED") "UNSIGNED")
    (cons (symbol-name-default-case "ZEROFILL") "ZEROFILL")
    (cons (symbol-name-default-case "AUTO-INCREMENT") "AUTO_INCREMENT")
-   (cons (symbol-name-default-case "UNIQUE") "UNIQUE")))
+   (cons (symbol-name-default-case "DEFAULT") "DEFAULT")
+   (cons (symbol-name-default-case "UNIQUE") "UNIQUE")
+   (cons (symbol-name-default-case "IDENTITY") "IDENTITY (1,1)") ;; added for sql-server support
+   ))
 
 (defmethod database-constraint-statement (constraint-list database)
   (declare (ignore database))
@@ -986,6 +1016,9 @@ uninclusive, and the args from that keyword to the end."
                        :message (format nil "unsupported column constraint '~A'"
                                         constraint))
                 (setq string (concatenate 'string string (cdr output))))
+	    (when (equal (symbol-name (car constraint)) "DEFAULT")
+	      (setq constraint (cdr constraint))
+	      (setq string (concatenate 'string string " " (car constraint))))
             (if (< 1 (length constraint))
                 (setq string (concatenate 'string string " "))))))))