;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
;;;; *************************************************************************
-(in-package #:clsql)
+(in-package #:clsql-sys)
(defvar +empty-string+ "''")
(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)))
+ (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
:initform nil)
(order-by-descending
:initarg :order-by-descending
+ :initform nil)
+ (inner-join
+ :initarg :inner-join
+ :initform nil)
+ (on
+ :initarg :on
:initform nil))
(:documentation "An SQL SELECT query."))
+(defclass sql-object-query (%sql-expression)
+ ((objects
+ :initarg :objects
+ :initform nil)
+ (flatp
+ :initarg :flatp
+ :initform nil)
+ (exp
+ :initarg :exp
+ :initform nil)
+ (refresh
+ :initarg :refresh
+ :initform nil)))
+
(defmethod collect-table-refs ((sql sql-query))
(remove-duplicates (collect-table-refs (slot-value sql 'where))
:test (lambda (tab1 tab2)
(defvar *select-arguments*
'(:all :database :distinct :flatp :from :group-by :having :order-by
- :order-by-descending :set-operation :where :offset :limit))
+ :order-by-descending :set-operation :where :offset :limit
+ :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*))
(multiple-value-bind (selections arglist)
(query-get-selections args)
(if (select-objects selections)
- (apply #'select args)
+ (destructuring-bind (&key flatp refresh &allow-other-keys) arglist
+ (make-instance 'sql-object-query :objects selections
+ :flatp flatp :refresh refresh
+ :exp arglist))
(destructuring-bind (&key all flatp set-operation distinct from where
group-by having order-by order-by-descending
- offset limit &allow-other-keys)
+ offset limit inner-join on &allow-other-keys)
arglist
(if (null selections)
(error "No target columns supplied to select statement."))
:distinct distinct :from from :where where
:limit limit :offset offset
:group-by group-by :having having :order-by order-by
- :order-by-descending order-by-descending))))))
+ :order-by-descending order-by-descending
+ :inner-join inner-join :on on))))))
(defvar *in-subselect* nil)
(defmethod output-sql ((query sql-query) database)
(with-slots (distinct selections from where group-by having order-by
- order-by-descending limit offset)
+ order-by-descending limit offset inner-join on)
query
(when *in-subselect*
(write-string "(" *sql-stream*))
(output-sql distinct database)
(write-char #\Space *sql-stream*)))
(output-sql (apply #'vector selections) database)
- (write-string " FROM " *sql-stream*)
- (if (listp from)
- (output-sql (apply #'vector from) database)
- (output-sql from database))
+ (when from
+ (write-string " FROM " *sql-stream*)
+ (if (listp from)
+ (output-sql (apply #'vector from) database)
+ (output-sql from database)))
+ (when inner-join
+ (write-string " INNER JOIN " *sql-stream*)
+ (output-sql inner-join database))
+ (when on
+ (write-string " ON " *sql-stream*)
+ (output-sql on database))
(when where
(write-string " WHERE " *sql-stream*)
(let ((*in-subselect* t))
(write-string ")" *sql-stream*)))
t)
+(defmethod output-sql ((query sql-object-query) database)
+ (with-slots (objects)
+ query
+ (when objects
+ (format *sql-stream* "(~{~A~^ ~})" objects))))
+
+
;; INSERT
(defclass sql-insert (%sql-expression)
;; Here's a real warhorse of a function!
+(declaim (inline listify))
(defun listify (x)
(if (atom x)
(list x)
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