1 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
2 ;;;; *************************************************************************
6 ;;;; The CLSQL Object Oriented Data Manipulation Language (OODML).
8 ;;;; This file is part of CLSQL.
10 ;;;; CLSQL users are granted the rights to distribute and use this software
11 ;;;; as governed by the terms of the Lisp Lesser GNU Public License
12 ;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
13 ;;;; *************************************************************************
15 (in-package #:clsql-sys
)
18 (defun key-qualifier-for-instance (obj &key
(database *default-database
*))
19 (let ((tb (view-table (class-of obj
))))
22 (sql-expression :attribute
23 (view-class-slot-column k
)
27 (slot-value obj
(slot-definition-name k
))
29 (let* ((keys (keyslots-for-class (class-of obj
)))
30 (keyxprs (mapcar #'qfk
(reverse keys
))))
32 ((= (length keyxprs
) 0) nil
)
33 ((= (length keyxprs
) 1) (car keyxprs
))
34 ((> (length keyxprs
) 1) (apply #'sql-operation
'and keyxprs
)))))))
37 ;; Function used by 'generate-selection-list'
40 (defun generate-attribute-reference (vclass slotdef
)
42 ((eq (view-class-slot-db-kind slotdef
) :base
)
43 (sql-expression :attribute
(view-class-slot-column slotdef
)
44 :table
(view-table vclass
)))
45 ((eq (view-class-slot-db-kind slotdef
) :key
)
46 (sql-expression :attribute
(view-class-slot-column slotdef
)
47 :table
(view-table vclass
)))
51 ;; Function used by 'find-all'
54 (defun generate-selection-list (vclass)
56 (dolist (slotdef (ordered-class-slots vclass
))
57 (let ((res (generate-attribute-reference vclass slotdef
)))
59 (push (cons slotdef res
) sels
))))
62 (error "No slots of type :base in view-class ~A" (class-name vclass
)))))
66 (defun generate-retrieval-joins-list (vclass retrieval-method
)
67 "Returns list of immediate join slots for a class."
68 (let ((join-slotdefs nil
))
69 (dolist (slotdef (ordered-class-slots vclass
) join-slotdefs
)
70 (when (and (eq :join
(view-class-slot-db-kind slotdef
))
71 (eq retrieval-method
(gethash :retrieval
(view-class-slot-db-info slotdef
))))
72 (push slotdef join-slotdefs
)))))
74 (defun generate-immediate-joins-selection-list (vclass)
75 "Returns list of immediate join slots for a class."
77 (dolist (joined-slot (generate-retrieval-joins-list vclass
:immediate
) sels
)
78 (let* ((join-class-name (gethash :join-class
(view-class-slot-db-info joined-slot
)))
79 (join-class (when join-class-name
(find-class join-class-name
))))
80 (dolist (slotdef (ordered-class-slots join-class
))
81 (let ((res (generate-attribute-reference join-class slotdef
)))
83 (push (cons slotdef res
) sels
))))))
87 ;; Called by 'get-slot-values-from-view'
90 (defmethod update-slot-from-db ((instance standard-db-object
) slotdef value
)
91 (declare (optimize (speed 3) #+cmu
(extensions:inhibit-warnings
3)))
92 (let* ((slot-reader (view-class-slot-db-reader slotdef
))
93 (slot-name (slot-definition-name slotdef
))
94 (slot-type (specified-type slotdef
)))
95 (cond ((and value
(null slot-reader
))
96 (setf (slot-value instance slot-name
)
97 (read-sql-value value
(delistify slot-type
)
98 (view-database instance
)
99 (database-underlying-type
100 (view-database instance
)))))
102 (update-slot-with-null instance slot-name slotdef
))
103 ((typep slot-reader
'string
)
104 (setf (slot-value instance slot-name
)
105 (format nil slot-reader value
)))
106 ((typep slot-reader
'(or symbol function
))
107 (setf (slot-value instance slot-name
)
108 (apply slot-reader
(list value
))))
110 (error "Slot reader is of an unusual type.")))))
112 (defmethod key-value-from-db (slotdef value database
)
113 (declare (optimize (speed 3) #+cmu
(extensions:inhibit-warnings
3)))
114 (let ((slot-reader (view-class-slot-db-reader slotdef
))
115 (slot-type (specified-type slotdef
)))
116 (cond ((and value
(null slot-reader
))
117 (read-sql-value value
(delistify slot-type
) database
118 (database-underlying-type database
)))
121 ((typep slot-reader
'string
)
122 (format nil slot-reader value
))
123 ((typep slot-reader
'(or symbol function
))
124 (apply slot-reader
(list value
)))
126 (error "Slot reader is of an unusual type.")))))
128 (defun db-value-from-slot (slotdef val database
)
129 (let ((dbwriter (view-class-slot-db-writer slotdef
))
130 (dbtype (specified-type slotdef
)))
132 (string (format nil dbwriter val
))
133 ((and (or symbol function
) (not null
)) (apply dbwriter
(list val
)))
135 (database-output-sql-as-type
139 val database
(database-underlying-type database
))))))
141 (defun check-slot-type (slotdef val
)
142 (let* ((slot-type (specified-type slotdef
))
143 (basetype (if (listp slot-type
) (car slot-type
) slot-type
)))
144 (when (and slot-type val
)
145 (unless (typep val basetype
)
146 (error 'sql-user-error
148 (format nil
"Invalid value ~A in slot ~A, not of type ~A."
149 val
(slot-definition-name slotdef
) slot-type
))))))
152 ;; Called by find-all
155 (defmethod get-slot-values-from-view (obj slotdeflist values
)
156 (flet ((update-slot (slot-def values
)
157 (update-slot-from-db obj slot-def values
)))
158 (mapc #'update-slot slotdeflist values
)
161 (defmethod update-record-from-slot ((obj standard-db-object
) slot
&key
162 (database *default-database
*))
163 (let* ((database (or (view-database obj
) database
))
164 (vct (view-table (class-of obj
)))
165 (sd (slotdef-for-slot-with-class slot
(class-of obj
))))
166 (check-slot-type sd
(slot-value obj slot
))
167 (let* ((att (view-class-slot-column sd
))
168 (val (db-value-from-slot sd
(slot-value obj slot
) database
)))
169 (cond ((and vct sd
(view-database obj
))
170 (update-records (sql-expression :table vct
)
171 :attributes
(list (sql-expression :attribute att
))
173 :where
(key-qualifier-for-instance
174 obj
:database database
)
176 ((and vct sd
(not (view-database obj
)))
177 (insert-records :into
(sql-expression :table vct
)
178 :attributes
(list (sql-expression :attribute att
))
181 (setf (slot-value obj
'view-database
) database
))
183 (error "Unable to update record.")))))
186 (defmethod update-record-from-slots ((obj standard-db-object
) slots
&key
187 (database *default-database
*))
188 (let* ((database (or (view-database obj
) database
))
189 (vct (view-table (class-of obj
)))
190 (sds (slotdefs-for-slots-with-class slots
(class-of obj
)))
191 (avps (mapcar #'(lambda (s)
192 (let ((val (slot-value
193 obj
(slot-definition-name s
))))
194 (check-slot-type s val
)
195 (list (sql-expression
196 :attribute
(view-class-slot-column s
))
197 (db-value-from-slot s val database
))))
199 (cond ((and avps
(view-database obj
))
200 (update-records (sql-expression :table vct
)
202 :where
(key-qualifier-for-instance
203 obj
:database database
)
205 ((and avps
(not (view-database obj
)))
206 (insert-records :into
(sql-expression :table vct
)
209 (setf (slot-value obj
'view-database
) database
))
211 (error "Unable to update records"))))
214 (defmethod update-records-from-instance ((obj standard-db-object
) &key database
)
215 (let ((database (or database
(view-database obj
) *default-database
*)))
216 (labels ((slot-storedp (slot)
217 (and (member (view-class-slot-db-kind slot
) '(:base
:key
))
218 (slot-boundp obj
(slot-definition-name slot
))))
219 (slot-value-list (slot)
220 (let ((value (slot-value obj
(slot-definition-name slot
))))
221 (check-slot-type slot value
)
222 (list (sql-expression :attribute
(view-class-slot-column slot
))
223 (db-value-from-slot slot value database
)))))
224 (let* ((view-class (class-of obj
))
225 (view-class-table (view-table view-class
))
226 (slots (remove-if-not #'slot-storedp
227 (ordered-class-slots view-class
)))
228 (record-values (mapcar #'slot-value-list slots
)))
229 (unless record-values
230 (error "No settable slots."))
231 (if (view-database obj
)
232 (update-records (sql-expression :table view-class-table
)
233 :av-pairs record-values
234 :where
(key-qualifier-for-instance
235 obj
:database database
)
238 (insert-records :into
(sql-expression :table view-class-table
)
239 :av-pairs record-values
241 (setf (slot-value obj
'view-database
) database
))))))
244 (defmethod delete-instance-records ((instance standard-db-object
))
245 (let ((vt (sql-expression :table
(view-table (class-of instance
))))
246 (vd (view-database instance
)))
248 (let ((qualifier (key-qualifier-for-instance instance
:database vd
)))
249 (delete-records :from vt
:where qualifier
:database vd
)
250 (setf (record-caches vd
) nil
)
251 (setf (slot-value instance
'view-database
) nil
)
253 (signal-no-database-error vd
))))
255 (defmethod update-instance-from-records ((instance standard-db-object
)
256 &key
(database *default-database
*))
257 (let* ((view-class (find-class (class-name (class-of instance
))))
258 (view-table (sql-expression :table
(view-table view-class
)))
259 (vd (or (view-database instance
) database
))
260 (view-qual (key-qualifier-for-instance instance
:database vd
))
261 (sels (generate-selection-list view-class
))
262 (res (apply #'select
(append (mapcar #'cdr sels
)
263 (list :from view-table
268 (get-slot-values-from-view instance
(mapcar #'car sels
) (car res
)))))
270 (defmethod update-slot-from-record ((instance standard-db-object
)
271 slot
&key
(database *default-database
*))
272 (let* ((view-class (find-class (class-name (class-of instance
))))
273 (view-table (sql-expression :table
(view-table view-class
)))
274 (vd (or (view-database instance
) database
))
275 (view-qual (key-qualifier-for-instance instance
:database vd
))
276 (slot-def (slotdef-for-slot-with-class slot view-class
))
277 (att-ref (generate-attribute-reference view-class slot-def
))
278 (res (select att-ref
:from view-table
:where view-qual
281 (get-slot-values-from-view instance
(list slot-def
) (car res
)))))
284 (defmethod update-slot-with-null ((object standard-db-object
)
287 (setf (slot-value object slotname
) (slot-value slotdef
'void-value
)))
289 (defvar +no-slot-value
+ '+no-slot-value
+)
291 (defsql sql-slot-value
(:symbol
"slot-value") (classname slot
&optional
(value +no-slot-value
+) (database *default-database
*))
292 (let* ((class (find-class classname
))
293 (sld (slotdef-for-slot-with-class slot class
)))
295 (if (eq value
+no-slot-value
+)
296 (sql-expression :attribute
(view-class-slot-column sld
)
297 :table
(view-table class
))
302 (error "Unknown slot ~A for class ~A" slot classname
))))
304 (defsql sql-view-class
(:symbol
"view-class") (classname &optional
(database *default-database
*))
305 (declare (ignore database
))
306 (let* ((class (find-class classname
)))
307 (unless (view-table class
)
308 (error "No view-table for class ~A" classname
))
309 (sql-expression :table
(view-table class
))))
312 (defmethod database-get-type-specifier (type args database db-type
)
313 (declare (ignore type args database db-type
))
314 (format nil
"VARCHAR(~D)" *default-string-length
*))
316 (defmethod database-get-type-specifier ((type (eql 'integer
)) args database db-type
)
317 (declare (ignore database db-type
))
319 (format nil
"INT(~A)" (car args
))
323 "An 8-bit integer, this width may vary by SQL implementation."
326 (defmethod database-get-type-specifier ((type (eql 'tinyint
)) args database db-type
)
327 (declare (ignore args database db-type
))
331 "An integer smaller than a 32-bit integer. this width may vary by SQL implementation."
334 (defmethod database-get-type-specifier ((type (eql 'smallint
)) args database db-type
)
335 (declare (ignore args database db-type
))
338 (deftype mediumint
()
339 "An integer smaller than a 32-bit integer, but may be larger than a smallint. This width may vary by SQL implementation."
342 (defmethod database-get-type-specifier ((type (eql 'mediumint
)) args database db-type
)
343 (declare (ignore args database db-type
))
347 "An integer larger than a 32-bit integer, this width may vary by SQL implementation."
350 (defmethod database-get-type-specifier ((type (eql 'bigint
)) args database db-type
)
351 (declare (ignore args database db-type
))
354 (deftype varchar
(&optional size
)
355 "A variable length string for the SQL varchar type."
356 (declare (ignore size
))
359 (defmethod database-get-type-specifier ((type (eql 'varchar
)) args
361 (declare (ignore database db-type
))
363 (format nil
"VARCHAR(~A)" (car args
))
364 (format nil
"VARCHAR(~D)" *default-string-length
*)))
366 (defmethod database-get-type-specifier ((type (eql 'string
)) args database db-type
)
367 (declare (ignore database db-type
))
369 (format nil
"CHAR(~A)" (car args
))
370 (format nil
"VARCHAR(~D)" *default-string-length
*)))
372 (deftype universal-time
()
373 "A positive integer as returned by GET-UNIVERSAL-TIME."
376 (defmethod database-get-type-specifier ((type (eql 'universal-time
)) args database db-type
)
377 (declare (ignore args database db-type
))
380 (defmethod database-get-type-specifier ((type (eql 'wall-time
)) args database db-type
)
381 (declare (ignore args database db-type
))
384 (defmethod database-get-type-specifier ((type (eql 'date
)) args database db-type
)
385 (declare (ignore args database db-type
))
388 (defmethod database-get-type-specifier ((type (eql 'duration
)) args database db-type
)
389 (declare (ignore database args db-type
))
392 (defmethod database-get-type-specifier ((type (eql 'money
)) args database db-type
)
393 (declare (ignore database args db-type
))
397 (deftype char
(&optional len
)
398 "A lisp type for the SQL CHAR type."
401 (defmethod database-get-type-specifier ((type (eql 'float
)) args database db-type
)
402 (declare (ignore database db-type
))
404 (format nil
"FLOAT(~A)" (car args
))
407 (defmethod database-get-type-specifier ((type (eql 'long-float
)) args database db-type
)
408 (declare (ignore database db-type
))
410 (format nil
"FLOAT(~A)" (car args
))
413 (deftype generalized-boolean
()
414 "A type which outputs a SQL boolean value, though any lisp type can be stored in the slot."
417 (defmethod database-get-type-specifier ((type (eql 'boolean
)) args database db-type
)
418 (declare (ignore args database db-type
))
421 (defmethod database-get-type-specifier ((type (eql 'generalized-boolean
)) args database db-type
)
422 (declare (ignore args database db-type
))
425 (defmethod database-get-type-specifier ((type (eql 'number
)) args database db-type
)
426 (declare (ignore database db-type
))
428 ((and (consp args
) (= (length args
) 2))
429 (format nil
"NUMBER(~D,~D)" (first args
) (second args
)))
430 ((and (consp args
) (= (length args
) 1))
431 (format nil
"NUMBER(~D)" (first args
)))
435 (defmethod database-get-type-specifier ((type (eql 'char
)) args database db-type
)
436 (declare (ignore database db-type
))
438 (format nil
"CHAR(~D)" (first args
))
442 (defmethod database-output-sql-as-type (type val database db-type
)
443 (declare (ignore type database db-type
))
446 (defmethod database-output-sql-as-type ((type (eql 'list
)) val database db-type
)
447 (declare (ignore database db-type
))
448 (progv '(*print-circle
* *print-array
*) '(t t
)
449 (let ((escaped (prin1-to-string val
)))
450 (substitute-char-string
451 escaped
#\Null
" "))))
453 (defmethod database-output-sql-as-type ((type (eql 'symbol
)) val database db-type
)
454 (declare (ignore database db-type
))
457 (package-name (symbol-package val
))
462 (defmethod database-output-sql-as-type ((type (eql 'keyword
)) val database db-type
)
463 (declare (ignore database db-type
))
468 (defmethod database-output-sql-as-type ((type (eql 'vector
)) val database db-type
)
469 (declare (ignore database db-type
))
470 (progv '(*print-circle
* *print-array
*) '(t t
)
471 (prin1-to-string val
)))
473 (defmethod database-output-sql-as-type ((type (eql 'array
)) val database db-type
)
474 (declare (ignore database db-type
))
475 (progv '(*print-circle
* *print-array
*) '(t t
)
476 (prin1-to-string val
)))
478 (defmethod database-output-sql-as-type ((type (eql 'boolean
)) val database db-type
)
479 (declare (ignore database db-type
))
482 (defmethod database-output-sql-as-type ((type (eql 'generalized-boolean
)) val database db-type
)
483 (declare (ignore database db-type
))
486 (defmethod database-output-sql-as-type ((type (eql 'string
)) val database db-type
)
487 (declare (ignore database db-type
))
490 (defmethod database-output-sql-as-type ((type (eql 'char
)) val database db-type
)
491 (declare (ignore database db-type
))
493 (character (write-to-string val
))
496 (defmethod database-output-sql-as-type ((type (eql 'float
)) val database db-type
)
497 (declare (ignore database db-type
))
498 (let ((*read-default-float-format
* (type-of val
)))
499 (format nil
"~F" val
)))
501 (defmethod read-sql-value (val type database db-type
)
502 (declare (ignore type database db-type
))
503 (read-from-string val
))
505 (defmethod read-sql-value (val (type (eql 'string
)) database db-type
)
506 (declare (ignore database db-type
))
509 (defmethod read-sql-value (val (type (eql 'varchar
)) database db-type
)
510 (declare (ignore database db-type
))
513 (defmethod read-sql-value (val (type (eql 'char
)) database db-type
)
514 (declare (ignore database db-type
))
517 (defmethod read-sql-value (val (type (eql 'keyword
)) database db-type
)
518 (declare (ignore database db-type
))
519 (when (< 0 (length val
))
520 (intern (symbol-name-default-case val
)
521 (find-package '#:keyword
))))
523 (defmethod read-sql-value (val (type (eql 'symbol
)) database db-type
)
524 (declare (ignore database db-type
))
525 (when (< 0 (length val
))
526 (unless (string= val
(symbol-name-default-case "NIL"))
527 (read-from-string val
))))
529 (defmethod read-sql-value (val (type (eql 'integer
)) database db-type
)
530 (declare (ignore database db-type
))
533 (unless (string-equal "NIL" val
)
534 (parse-integer val
)))
537 (defmethod read-sql-value (val (type (eql 'smallint
)) database db-type
)
538 (declare (ignore database db-type
))
541 (unless (string-equal "NIL" val
)
542 (parse-integer val
)))
545 (defmethod read-sql-value (val (type (eql 'bigint
)) database db-type
)
546 (declare (ignore database db-type
))
549 (unless (string-equal "NIL" val
)
550 (parse-integer val
)))
553 (defmethod read-sql-value (val (type (eql 'float
)) database db-type
)
554 (declare (ignore database db-type
))
555 ;; writing 1.0 writes 1, so we we *really* want a float, must do (float ...)
558 (float (read-from-string val
)))
562 (defmethod read-sql-value (val (type (eql 'boolean
)) database db-type
)
563 (declare (ignore database db-type
))
566 (defmethod read-sql-value (val (type (eql 'generalized-boolean
)) database db-type
)
567 (declare (ignore database db-type
))
570 (defmethod read-sql-value (val (type (eql 'number
)) database db-type
)
571 (declare (ignore database db-type
))
574 (unless (string-equal "NIL" val
)
575 (read-from-string val
)))
578 (defmethod read-sql-value (val (type (eql 'universal-time
)) database db-type
)
579 (declare (ignore database db-type
))
580 (unless (eq 'NULL val
)
586 (defmethod read-sql-value (val (type (eql 'wall-time
)) database db-type
)
587 (declare (ignore database db-type
))
588 (unless (eq 'NULL val
)
589 (parse-timestring val
)))
591 (defmethod read-sql-value (val (type (eql 'date
)) database db-type
)
592 (declare (ignore database db-type
))
593 (unless (eq 'NULL val
)
594 (parse-datestring val
)))
596 (defmethod read-sql-value (val (type (eql 'duration
)) database db-type
)
597 (declare (ignore database db-type
))
598 (unless (or (eq 'NULL val
)
600 (parse-timestring val
)))
602 ;; ------------------------------------------------------------
603 ;; Logic for 'faulting in' :join slots
605 ;; this works, but is inefficient requiring (+ 1 n-rows)
608 (defun fault-join-target-slot (class object slot-def
)
609 (let* ((res (fault-join-slot-raw class object slot-def
))
610 (dbi (view-class-slot-db-info slot-def
))
611 (target-name (gethash :target-slot dbi
))
612 (target-class (find-class target-name
)))
614 (mapcar (lambda (obj)
620 (find target-name
(class-slots (class-of obj
))
621 :key
#'slot-definition-name
)))
624 #+ignore
;; this doesn't work when attempting to call slot-value
625 (mapcar (lambda (obj)
626 (cons obj
(slot-value obj ts
))) res
))))
628 (defun fault-join-target-slot (class object slot-def
)
629 (let* ((dbi (view-class-slot-db-info slot-def
))
630 (ts (gethash :target-slot dbi
))
631 (jc (gethash :join-class dbi
))
632 (jc-view-table (view-table (find-class jc
)))
633 (tdbi (view-class-slot-db-info
634 (find ts
(class-slots (find-class jc
))
635 :key
#'slot-definition-name
)))
636 (retrieval (gethash :retrieval tdbi
))
637 (tsc (gethash :join-class tdbi
))
638 (ts-view-table (view-table (find-class tsc
)))
639 (jq (join-qualifier class object slot-def
))
640 (key (slot-value object
(gethash :home-key dbi
))))
647 :inner-join
(sql-expression :table jc-view-table
)
651 :attribute
(gethash :foreign-key tdbi
)
652 :table ts-view-table
)
654 :attribute
(gethash :home-key tdbi
)
655 :table jc-view-table
))
658 :database
(view-database object
))))
659 (mapcar #'(lambda (i)
660 (let* ((instance (car i
))
661 (jcc (make-instance jc
:view-database
(view-database instance
))))
662 (setf (slot-value jcc
(gethash :foreign-key dbi
))
664 (setf (slot-value jcc
(gethash :home-key tdbi
))
665 (slot-value instance
(gethash :foreign-key tdbi
)))
666 (list instance jcc
)))
669 ;; just fill in minimal slots
672 (let ((instance (make-instance tsc
:view-database
(view-database object
)))
673 (jcc (make-instance jc
:view-database
(view-database object
)))
675 (setf (slot-value instance
(gethash :home-key tdbi
)) fk
)
676 (setf (slot-value jcc
(gethash :foreign-key dbi
))
678 (setf (slot-value jcc
(gethash :home-key tdbi
))
680 (list instance jcc
)))
681 (select (sql-expression :attribute
(gethash :foreign-key tdbi
) :table jc-view-table
)
682 :from
(sql-expression :table jc-view-table
)
684 :database
(view-database object
))))))))
689 (defvar *default-update-objects-max-len
* nil
690 "The default value to use for the MAX-LEN keyword argument to
691 UPDATE-OBJECT-JOINS.")
693 (defun update-objects-joins (objects &key
(slots t
) (force-p t
)
695 *default-update-objects-max-len
*))
696 "Updates from the records of the appropriate database tables
697 the join slots specified by SLOTS in the supplied list of View
698 Class instances OBJECTS. SLOTS is t by default which means that
699 all join slots with :retrieval :immediate are updated. CLASS-NAME
700 is used to specify the View Class of all instance in OBJECTS and
701 default to nil which means that the class of the first instance
702 in OBJECTS is used. FORCE-P is t by default which means that all
703 join slots are updated whereas a value of nil means that only
704 unbound join slots are updated. MAX-LEN defaults to
705 *DEFAULT-UPDATE-OBJECTS-MAX-LEN* and when non-nil specifies that
706 UPDATE-OBJECT-JOINS may issue multiple database queries with a
707 maximum of MAX-LEN instances updated in each query."
708 (assert (or (null max-len
) (plusp max-len
)))
711 (setq class-name
(class-name (class-of (first objects
)))))
712 (let* ((class (find-class class-name
))
713 (class-slots (ordered-class-slots class
))
716 (generate-retrieval-joins-list class
:deferred
)
718 (mapcar #'(lambda (name)
719 (let ((slotdef (find name class-slots
:key
#'slot-definition-name
)))
721 (warn "Unable to find slot named ~S in class ~S." name class
))
724 (dolist (slotdef slotdefs
)
725 (let* ((dbi (view-class-slot-db-info slotdef
))
726 (slotdef-name (slot-definition-name slotdef
))
727 (foreign-key (gethash :foreign-key dbi
))
728 (home-key (gethash :home-key dbi
))
732 (mapcar #'(lambda (o) (slot-value o home-key
)) objects
)
735 #'(lambda (o) (if (slot-boundp o slotdef-name
)
737 (slot-value o home-key
)))
739 (n-object-keys (length object-keys
))
740 (query-len (or max-len n-object-keys
)))
742 (do ((i 0 (+ i query-len
)))
743 ((>= i n-object-keys
))
744 (let* ((keys (if max-len
745 (subseq object-keys i
(min (+ i query-len
) n-object-keys
))
747 (results (unless (gethash :target-slot dbi
)
748 (find-all (list (gethash :join-class dbi
))
749 :where
(make-instance 'sql-relational-exp
751 :sub-expressions
(list (sql-expression :attribute foreign-key
)
756 (dolist (object objects
)
757 (when (or force-p
(not (slot-boundp object slotdef-name
)))
758 (let ((res (if results
759 (remove-if-not #'(lambda (obj)
760 (equal obj
(slot-value
769 (when (gethash :target-slot dbi
)
770 (fault-join-target-slot class object slotdef
))))))
772 (setf (slot-value object slotdef-name
)
773 (if (gethash :set dbi
) res
(car res
)))))))))))))
776 (defun fault-join-slot-raw (class object slot-def
)
777 (let* ((dbi (view-class-slot-db-info slot-def
))
778 (jc (gethash :join-class dbi
)))
779 (let ((jq (join-qualifier class object slot-def
)))
781 (select jc
:where jq
:flatp t
:result-types nil
782 :database
(view-database object
))))))
784 (defun fault-join-slot (class object slot-def
)
785 (let* ((dbi (view-class-slot-db-info slot-def
))
786 (ts (gethash :target-slot dbi
)))
787 (if (and ts
(gethash :set dbi
))
788 (fault-join-target-slot class object slot-def
)
789 (let ((res (fault-join-slot-raw class object slot-def
)))
792 ((and ts
(not (gethash :set dbi
)))
793 (mapcar (lambda (obj) (slot-value obj ts
)) res
))
794 ((and (not ts
) (not (gethash :set dbi
)))
796 ((and (not ts
) (gethash :set dbi
))
799 (defun join-qualifier (class object slot-def
)
800 (declare (ignore class
))
801 (let* ((dbi (view-class-slot-db-info slot-def
))
802 (jc (find-class (gethash :join-class dbi
)))
803 ;;(ts (gethash :target-slot dbi))
804 ;;(tsdef (if ts (slotdef-for-slot-with-class ts jc)))
805 (foreign-keys (gethash :foreign-key dbi
))
806 (home-keys (gethash :home-key dbi
)))
807 (when (every #'(lambda (slt)
808 (and (slot-boundp object slt
)
809 (not (null (slot-value object slt
)))))
810 (if (listp home-keys
) home-keys
(list home-keys
)))
812 (mapcar #'(lambda (hk fk
)
813 (let ((fksd (slotdef-for-slot-with-class fk jc
)))
819 (view-class-slot-column fksd
)
820 :table
(view-table jc
)))
824 (slot-value object hk
))
827 (if (listp home-keys
)
830 (if (listp foreign-keys
)
832 (list foreign-keys
)))))
834 (if (> (length jc
) 1)
838 ;; FIXME: add retrieval immediate for efficiency
839 ;; For example, for (select 'employee-address) in test suite =>
840 ;; select addr.*,ea_join.* FROM addr,ea_join WHERE ea_join.aaddressid=addr.addressid\g
842 (defun build-objects (vals sclasses immediate-join-classes sels immediate-joins database refresh flatp instances
)
843 "Used by find-all to build objects."
844 (labels ((build-object (vals vclass jclasses selects immediate-selects instance
)
845 (let* ((db-vals (butlast vals
(- (list-length vals
)
846 (list-length selects
))))
847 (obj (if instance instance
(make-instance (class-name vclass
) :view-database database
)))
848 (join-vals (subseq vals
(list-length selects
)))
849 (joins (mapcar #'(lambda (c) (when c
(make-instance c
:view-database database
)))
852 ;;(format t "joins: ~S~%db-vals: ~S~%join-values: ~S~%selects: ~S~%immediate-selects: ~S~%"
853 ;;joins db-vals join-vals selects immediate-selects)
855 ;; use refresh keyword here
856 (setf obj
(get-slot-values-from-view obj
(mapcar #'car selects
) db-vals
))
858 ;; find all immediate-select slots and join-vals for this object
859 (let* ((slots (class-slots (class-of jo
)))
860 (pos-list (remove-if #'null
863 (position s immediate-selects
867 (get-slot-values-from-view jo
869 (mapcar #'(lambda (pos)
870 (nth pos immediate-selects
))
872 (mapcar #'(lambda (pos) (nth pos join-vals
))
877 (let ((slot (find (class-name (class-of jc
)) (class-slots vclass
)
878 :key
#'(lambda (slot)
879 (when (and (eq :join
(view-class-slot-db-kind slot
))
880 (eq (slot-definition-name slot
)
881 (gethash :join-class
(view-class-slot-db-info slot
))))
882 (slot-definition-name slot
))))))
884 (setf (slot-value obj
(slot-definition-name slot
)) jc
))))
886 (when refresh
(instance-refreshed obj
))
889 (mapcar #'(lambda (sclass jclass sel immediate-join instance
)
891 (build-object vals sclass jclass sel immediate-join instance
)
892 (setf vals
(nthcdr (+ (list-length sel
) (list-length immediate-join
))
894 sclasses immediate-join-classes sels immediate-joins instances
)))
895 (if (and flatp
(= (length sclasses
) 1))
899 (defun find-all (view-classes
901 &key all set-operation distinct from where group-by having
902 order-by offset limit refresh flatp result-types
904 (database *default-database
*)
906 "Called by SELECT to generate object query results when the
907 View Classes VIEW-CLASSES are passed as arguments to SELECT."
908 (declare (ignore all set-operation group-by having offset limit inner-join on
))
909 (flet ((ref-equal (ref1 ref2
)
910 (string= (sql-output ref1 database
)
911 (sql-output ref2 database
)))
912 (table-sql-expr (table)
913 (sql-expression :table
(view-table table
)))
914 (tables-equal (table-a table-b
)
915 (when (and table-a table-b
)
916 (string= (string (slot-value table-a
'name
))
917 (string (slot-value table-b
'name
))))))
921 (remf args
:additional-fields
)
922 (remf args
:result-types
)
923 (remf args
:instances
)
924 (let* ((*db-deserializing
* t
)
925 (sclasses (mapcar #'find-class view-classes
))
926 (immediate-join-slots
927 (mapcar #'(lambda (c) (generate-retrieval-joins-list c
:immediate
)) sclasses
))
928 (immediate-join-classes
929 (mapcar #'(lambda (jcs)
930 (mapcar #'(lambda (slotdef)
931 (find-class (gethash :join-class
(view-class-slot-db-info slotdef
))))
933 immediate-join-slots
))
934 (immediate-join-sels (mapcar #'generate-immediate-joins-selection-list sclasses
))
935 (sels (mapcar #'generate-selection-list sclasses
))
936 (fullsels (apply #'append
(mapcar #'append sels immediate-join-sels
)))
937 (sel-tables (collect-table-refs where
))
938 (tables (remove-if #'null
940 (append (mapcar #'table-sql-expr sclasses
)
941 (mapcan #'(lambda (jc-list)
943 #'(lambda (jc) (when jc
(table-sql-expr jc
)))
945 immediate-join-classes
)
947 :test
#'tables-equal
)))
948 (order-by-slots (mapcar #'(lambda (ob) (if (atom ob
) ob
(car ob
)))
953 ;;(format t "sclasses: ~W~%ijc: ~W~%tables: ~W~%" sclasses immediate-join-classes tables)
955 (dolist (ob order-by-slots
)
956 (when (and ob
(not (member ob
(mapcar #'cdr fullsels
)
959 (append fullsels
(mapcar #'(lambda (att) (cons nil att
))
961 (dolist (ob (listify distinct
))
962 (when (and (typep ob
'sql-ident
)
963 (not (member ob
(mapcar #'cdr fullsels
)
966 (append fullsels
(mapcar #'(lambda (att) (cons nil att
))
968 (mapcar #'(lambda (vclass jclasses jslots
)
971 #'(lambda (jclass jslot
)
972 (let ((dbi (view-class-slot-db-info jslot
)))
975 (list (sql-operation '==
977 :attribute
(gethash :foreign-key dbi
)
978 :table
(view-table jclass
))
980 :attribute
(gethash :home-key dbi
)
981 :table
(view-table vclass
))))
982 (when join-where
(listify join-where
))))))
984 sclasses immediate-join-classes immediate-join-slots
)
985 ;; Reported buggy on clsql-devel
986 ;; (when where (setq where (listify where)))
988 ((and where join-where
)
989 (setq where
(list (apply #'sql-and where join-where
))))
990 ((and (null where
) (> (length join-where
) 1))
991 (setq where
(list (apply #'sql-and join-where
)))))
993 (let* ((rows (apply #'select
994 (append (mapcar #'cdr fullsels
)
996 (list (append (when from
(listify from
))
998 (list :result-types result-types
)
1000 (list :where where
))
1002 (instances-to-add (- (length rows
) (length instances
)))
1003 (perhaps-extended-instances
1004 (if (plusp instances-to-add
)
1005 (append instances
(do ((i 0 (1+ i
))
1007 ((= i instances-to-add
) res
)
1008 (push (make-list (length sclasses
) :initial-element nil
) res
)))
1011 #'(lambda (row instance
)
1012 (build-objects row sclasses immediate-join-classes sels
1013 immediate-join-sels database refresh flatp
1014 (if (and flatp
(atom instance
))
1017 rows perhaps-extended-instances
)))
1020 (defmethod instance-refreshed ((instance standard-db-object
)))
1022 (defvar *default-caching
* t
1023 "Controls whether SELECT caches objects by default. The CommonSQL
1024 specification states caching is on by default.")
1026 (defun select (&rest select-all-args
)
1027 "Executes a query on DATABASE, which has a default value of
1028 *DEFAULT-DATABASE*, specified by the SQL expressions supplied
1029 using the remaining arguments in SELECT-ALL-ARGS. The SELECT
1030 argument can be used to generate queries in both functional and
1031 object oriented contexts.
1033 In the functional case, the required arguments specify the
1034 columns selected by the query and may be symbolic SQL expressions
1035 or strings representing attribute identifiers. Type modified
1036 identifiers indicate that the values selected from the specified
1037 column are converted to the specified lisp type. The keyword
1038 arguments ALL, DISTINCT, FROM, GROUP-by, HAVING, ORDER-BY,
1039 SET-OPERATION and WHERE are used to specify, using the symbolic
1040 SQL syntax, the corresponding components of the SQL query
1041 generated by the call to SELECT. RESULT-TYPES is a list of
1042 symbols which specifies the lisp type for each field returned by
1043 the query. If RESULT-TYPES is nil all results are returned as
1044 strings whereas the default value of :auto means that the lisp
1045 types are automatically computed for each field. FIELD-NAMES is t
1046 by default which means that the second value returned is a list
1047 of strings representing the columns selected by the query. If
1048 FIELD-NAMES is nil, the list of column names is not returned as a
1051 In the object oriented case, the required arguments to SELECT are
1052 symbols denoting View Classes which specify the database tables
1053 to query. In this case, SELECT returns a list of View Class
1054 instances whose slots are set from the attribute values of the
1055 records in the specified table. Slot-value is a legal operator
1056 which can be employed as part of the symbolic SQL syntax used in
1057 the WHERE keyword argument to SELECT. REFRESH is nil by default
1058 which means that the View Class instances returned are retrieved
1059 from a cache if an equivalent call to SELECT has previously been
1060 issued. If REFRESH is true, the View Class instances returned are
1061 updated as necessary from the database and the generic function
1062 INSTANCE-REFRESHED is called to perform any necessary operations
1063 on the updated instances.
1065 In both object oriented and functional contexts, FLATP has a
1066 default value of nil which means that the results are returned as
1067 a list of lists. If FLATP is t and only one result is returned
1068 for each record selected in the query, the results are returned
1069 as elements of a list."
1071 (flet ((select-objects (target-args)
1073 (every #'(lambda (arg)
1075 (find-class arg nil
)))
1077 (multiple-value-bind (target-args qualifier-args
)
1078 (query-get-selections select-all-args
)
1079 (unless (or *default-database
* (getf qualifier-args
:database
))
1080 (signal-no-database-error nil
))
1083 ((select-objects target-args
)
1084 (let ((caching (getf qualifier-args
:caching
*default-caching
*))
1085 (result-types (getf qualifier-args
:result-types
:auto
))
1086 (refresh (getf qualifier-args
:refresh nil
))
1087 (database (or (getf qualifier-args
:database
) *default-database
*))
1088 (order-by (getf qualifier-args
:order-by
)))
1089 (remf qualifier-args
:caching
)
1090 (remf qualifier-args
:refresh
)
1091 (remf qualifier-args
:result-types
)
1093 ;; Add explicity table name to order-by if not specified and only
1094 ;; one selected table. This is required so FIND-ALL won't duplicate
1096 (when (and order-by
(= 1 (length target-args
)))
1097 (let ((table-name (view-table (find-class (car target-args
))))
1098 (order-by-list (copy-seq (listify order-by
))))
1100 (loop for i from
0 below
(length order-by-list
)
1101 do
(etypecase (nth i order-by-list
)
1102 (sql-ident-attribute
1103 (unless (slot-value (nth i order-by-list
) 'qualifier
)
1104 (setf (slot-value (nth i order-by-list
) 'qualifier
) table-name
)))
1106 (unless (slot-value (car (nth i order-by-list
)) 'qualifier
)
1107 (setf (slot-value (car (nth i order-by-list
)) 'qualifier
) table-name
)))))
1108 (setf (getf qualifier-args
:order-by
) order-by-list
)))
1112 (apply #'find-all target-args
1113 (append qualifier-args
1114 (list :result-types result-types
:refresh refresh
))))
1116 (let ((cached (records-cache-results target-args qualifier-args database
)))
1118 ((and cached
(not refresh
))
1120 ((and cached refresh
)
1121 (let ((results (apply #'find-all
(append (list target-args
) qualifier-args
`(:instances
,cached
:result-types
:auto
:refresh
,refresh
)))))
1122 (setf (records-cache-results target-args qualifier-args database
) results
)
1125 (let ((results (apply #'find-all target-args
(append qualifier-args
1126 `(:result-types
:auto
:refresh
,refresh
)))))
1127 (setf (records-cache-results target-args qualifier-args database
) results
)
1130 (let* ((expr (apply #'make-query select-all-args
))
1132 (mapcar #'(lambda (attrib)
1133 (if (typep attrib
'sql-ident-attribute
)
1134 (let ((type (slot-value attrib
'type
)))
1139 (slot-value expr
'selections
))))
1140 (destructuring-bind (&key
(flatp nil
)
1141 (result-types :auto
)
1143 (database *default-database
*)
1146 (query expr
:flatp flatp
1148 ;; specifying a type for an attribute overrides result-types
1149 (if (some #'(lambda (x) (not (eq t x
))) specified-types
)
1152 :field-names field-names
1153 :database database
))))))))
1155 (defun compute-records-cache-key (targets qualifiers
)
1157 (do ((args *select-arguments
* (cdr args
))
1159 ((null args
) results
)
1160 (let* ((arg (car args
))
1161 (value (getf qualifiers arg
)))
1165 (cons (cons (sql (car value
)) (cdr value
)))
1166 (%sql-expression
(sql value
))
1170 (defun records-cache-results (targets qualifiers database
)
1171 (when (record-caches database
)
1172 (gethash (compute-records-cache-key targets qualifiers
) (record-caches database
))))
1174 (defun (setf records-cache-results
) (results targets qualifiers database
)
1175 (unless (record-caches database
)
1176 (setf (record-caches database
)
1177 (make-hash-table :test
'equal
1178 #+allegro
:values
#+allegro
:weak
1179 #+clisp
:weak
#+clisp
:value
1180 #+lispworks
:weak-kind
#+lispworks
:value
)))
1181 (setf (gethash (compute-records-cache-key targets qualifiers
)
1182 (record-caches database
)) results
)
1187 ;;; Serialization functions
1189 (defun write-instance-to-stream (obj stream
)
1190 "Writes an instance to a stream where it can be later be read.
1191 NOTE: an error will occur if a slot holds a value which can not be written readably."
1192 (let* ((class (class-of obj
))
1194 (dolist (slot (ordered-class-slots (class-of obj
)))
1195 (let ((name (slot-definition-name slot
)))
1196 (when (and (not (eq 'view-database name
))
1197 (slot-boundp obj name
))
1198 (push (cons name
(slot-value obj name
)) alist
))))
1199 (setq alist
(reverse alist
))
1200 (write (cons (class-name class
) alist
) :stream stream
:readably t
))
1203 (defun read-instance-from-stream (stream)
1204 (let ((raw (read stream nil nil
)))
1206 (let ((obj (make-instance (car raw
))))
1207 (dolist (pair (cdr raw
))
1208 (setf (slot-value obj
(car pair
)) (cdr pair
)))