;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
;;;; *************************************************************************
-(in-package #:clsql)
+(in-package #:clsql-sys)
(defvar +empty-string+ "''")
(convert-to-db-default-case (symbol-name type) database)))
(format *sql-stream* "~@[~A.~]~A"
(when qualifier
- (convert-to-db-default-case (sql-escape qualifier) database))
+ (typecase qualifier
+ (string (format nil "~s" qualifier))
+ (t (convert-to-db-default-case (sql-escape qualifier)
+ database))))
(sql-escape (convert-to-db-default-case name database))))
t))
(when args (output-sql args database)))
t)
+
+(defclass sql-between-exp (sql-function-exp)
+ ()
+ (:documentation "An SQL between expression."))
+
+(defmethod output-sql ((expr sql-between-exp) database)
+ (with-slots (name args)
+ expr
+ (output-sql (first args) database)
+ (write-string " BETWEEN " *sql-stream*)
+ (output-sql (second args) database)
+ (write-string " AND " *sql-stream*)
+ (output-sql (third args) database))
+ t)
+
+(defclass sql-query-modifier-exp (%sql-expression)
+ ((modifier :initarg :modifier :initform nil)
+ (components :initarg :components :initform nil))
+ (:documentation "An SQL query modifier expression."))
+
+(defmethod output-sql ((expr sql-query-modifier-exp) database)
+ (with-slots (modifier components)
+ expr
+ (output-sql modifier database)
+ (write-string " " *sql-stream*)
+ (output-sql (car components) database)
+ (when components
+ (mapc #'(lambda (comp)
+ (write-string ", " *sql-stream*)
+ (output-sql comp database))
+ (cdr components))))
+ t)
+
+(defclass sql-set-exp (%sql-expression)
+ ((operator
+ :initarg :operator
+ :initform nil)
+ (sub-expressions
+ :initarg :sub-expressions
+ :initform nil))
+ (:documentation "An SQL set expression."))
+
+(defmethod collect-table-refs ((sql sql-set-exp))
+ (let ((tabs nil))
+ (dolist (exp (slot-value sql 'sub-expressions))
+ (let ((refs (collect-table-refs exp)))
+ (if refs (setf tabs (append refs tabs)))))
+ (remove-duplicates tabs
+ :test (lambda (tab1 tab2)
+ (equal (slot-value tab1 'name)
+ (slot-value tab2 'name))))))
+
+(defmethod output-sql ((expr sql-set-exp) database)
+ (with-slots (operator sub-expressions)
+ expr
+ (let ((subs (if (consp (car sub-expressions))
+ (car sub-expressions)
+ sub-expressions)))
+ (when (= (length subs) 1)
+ (output-sql operator database)
+ (write-char #\Space *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*))))
+ t)
+
(defclass sql-query (%sql-expression)
((selections
:initarg :selections
(defvar *select-arguments*
'(:all :database :distinct :flatp :from :group-by :having :order-by
:order-by-descending :set-operation :where :offset :limit
- :inner-join :on))
+ :inner-join :on
+ ;; below keywords are not a SQL argument, but these keywords may terminate select
+ :caching :refresh))
(defun query-arg-p (sym)
(member sym *select-arguments*))
(defmethod output-sql ((query sql-query) database)
(with-slots (distinct selections from where group-by having order-by
- order-by-descending limit offset inner-join on)
+ order-by-descending limit offset inner-join on
+ all set-operation)
query
(when *in-subselect*
(write-string "(" *sql-stream*))
(write-string "SELECT " *sql-stream*)
- (when distinct
+ (when all
+ (write-string "ALL " *sql-stream*))
+ (when (and distinct (not all))
(write-string "DISTINCT " *sql-stream*)
(unless (eql t distinct)
(write-string "ON " *sql-stream*)
(output-sql (apply #'vector selections) database)
(when from
(write-string " FROM " *sql-stream*)
- (if (listp from)
- (output-sql (apply #'vector from) database)
- (output-sql from database)))
+ (typecase from
+ (list (output-sql (apply #'vector from) database))
+ (string (write-string
+ (sql-escape
+ (convert-to-db-default-case from database)) *sql-stream*))
+ (t (output-sql from database))))
(when inner-join
(write-string " INNER JOIN " *sql-stream*)
(output-sql inner-join database))
(if (listp order-by)
(do ((order order-by (cdr order)))
((null order))
- (output-sql (car order) database)
- (when (cdr order)
- (write-char #\, *sql-stream*)))
+ (let ((item (car order)))
+ (typecase item
+ (cons
+ (output-sql (car item) database)
+ (format *sql-stream* " ~A" (cadr item)))
+ (t
+ (output-sql item database)))
+ (when (cdr order)
+ (write-char #\, *sql-stream*))))
(output-sql order-by database)))
(when order-by-descending
(write-string " ORDER BY " *sql-stream*)
(write-string " OFFSET " *sql-stream*)
(output-sql offset database))
(when *in-subselect*
- (write-string ")" *sql-stream*)))
+ (write-string ")" *sql-stream*))
+ (when set-operation
+ (write-char #\Space *sql-stream*)
+ (output-sql set-operation database)))
t)
(defmethod output-sql ((query sql-object-query) database)
+ (declare (ignore database))
(with-slots (objects)
query
(when objects