1 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
2 ;;;; *************************************************************************
3 ;;;; FILE IDENTIFICATION
5 ;;;; Name: oracle-sql.lisp
9 ;;;; This file is part of CLSQL.
11 ;;;; CLSQL users are granted the rights to distribute and use this software
12 ;;;; as governed by the terms of the Lisp Lesser GNU Public License
13 ;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
14 ;;;; *************************************************************************
16 (in-package #:clsql-oracle)
18 (defmethod database-initialize-database-type
19 ((database-type (eql :oracle)))
22 ;;;; arbitrary parameters, tunable for performance or other reasons
24 (eval-when (:compile-toplevel :load-toplevel :execute)
25 (defconstant +errbuf-len+ 512
26 "the number of characters that we allocate for an error message buffer")
27 (defconstant +n-buf-rows+ 200
28 "the number of table rows that we buffer at once when reading a table.
29 CMUCL has a compiled-in limit on how much C data can be allocated
30 (through malloc() and friends) at any given time, typically 8 Mb.
31 Setting this constant to a moderate value should make it less
32 likely that we'll have to worry about the CMUCL limit."))
35 (defmacro deref-vp (foreign-object)
36 `(uffi:deref-pointer ,foreign-object :pointer-void))
38 ;; constants - from OCI?
40 (defconstant +var-not-in-list+ 1007)
41 (defconstant +no-data-found+ 1403)
42 (defconstant +null-value-returned+ 1405)
43 (defconstant +field-truncated+ 1406)
45 (eval-when (:compile-toplevel :load-toplevel :execute)
46 (defconstant SQLT-NUMBER 2)
47 (defconstant SQLT-INT 3)
48 (defconstant SQLT-STR 5)
49 (defconstant SQLT-FLT 4)
50 (defconstant SQLT-DATE 12))
52 ;;; Note that despite the suggestive class name (and the way that the
53 ;;; *DEFAULT-DATABASE* variable holds an object of this class), a DB
54 ;;; object is not actually a database but is instead a connection to a
55 ;;; database. Thus, there's no obstacle to having any number of DB
56 ;;; objects referring to the same database.
58 (uffi:def-type pointer-pointer-void '(* :pointer-void))
60 (defclass oracle-database (database) ; was struct db
64 :type pointer-pointer-void
66 "OCI environment handle")
70 :type pointer-pointer-void
76 :type pointer-pointer-void
78 "OCI service context handle")
83 "optional data source name (used only for debugging/printing)")
89 "the \"user\" value given when data source connection was made")
93 :initform "YYYY-MM-DD HH24:MI:SS\"+00\"")
97 "Each database connection can be configured with its own date
98 output format. In order to extract date strings from output buffers
99 holding multiple date strings in fixed-width fields, we need to know
100 the length of that format.")
103 :initarg :server-version
104 :reader server-version
106 "Version string of Oracle server.")
107 (major-version-number
108 :type (or null fixnum)
109 :initarg :major-version-number
110 :reader major-version-number
112 "The major version number of Oracle, should be 8, 9, or 10")))
115 ;;; Handle the messy case of return code=+oci-error+, querying the
116 ;;; system for subcodes and reporting them as appropriate. ERRHP and
117 ;;; NULLS-OK are as in the OERR function.
119 (defun handle-oci-error (&key database nulls-ok)
123 (uffi:with-foreign-objects ((errbuf '(:array :unsigned-char
126 ;; ensure errbuf empty string
127 (setf (uffi:deref-array errbuf '(:array :unsigned-char) 0)
128 (uffi:ensure-char-storable (code-char 0)))
130 (setf (uffi:deref-pointer errcode :long) 0)
131 (oci-error-get (deref-vp errhp) 1
132 (uffi:make-null-pointer :unsigned-char)
133 errcode errbuf +errbuf-len+ +oci-htype-error+)
134 (let ((subcode (uffi:deref-pointer errcode :long)))
135 (unless (and nulls-ok (= subcode +null-value-returned+))
136 (error 'sql-database-error
139 :message (uffi:convert-from-foreign-string errbuf)))))))
141 (error 'sql-database-error
143 :message "can't handle NULLS-OK without ERRHP"))
145 (error 'sql-database-error
147 :message "OCI Error (and no ERRHP available to find subcode)"))))
149 ;;; Require an OCI success code.
151 ;;; (The ordinary OCI error reporting mechanisms uses a fair amount of
152 ;;; machinery (environments and other handles). In order to get to
153 ;;; where we can use these mechanisms, we have to be able to allocate
154 ;;; the machinery. The functions for allocating the machinery can
155 ;;; return errors (e.g. out of memory) but shouldn't. Wrapping this function
156 ;;; around function calls to such have-to-succeed functions enforces
160 (declare (type fixnum code))
161 (unless (= code +oci-success+)
162 (error 'sql-database-error
163 :message (format nil "unexpected OCI failure, code=~S" code))))
166 ;;; Enabling this can be handy for low-level debugging.
169 (trace oci-initialize #+oci-8-1-5 oci-env-create oci-handle-alloc oci-logon
170 oci-error-get oci-stmt-prepare oci-stmt-execute
171 oci-param-get oci-logon oci-attr-get oci-define-by-pos oci-stmt-fetch)
172 (setf debug::*debug-print-length* nil))
175 ;;;; the OCI library, part V: converting from OCI representations to Lisp
178 ;; Return the INDEXth string of the OCI array, represented as Lisp
179 ;; SIMPLE-STRING. SIZE is the size of the fixed-width fields used by
180 ;; Oracle to store strings within the array.
182 ;; In the wild world of databases, trailing spaces aren't generally
183 ;; significant, since e.g. "LARRY " and "LARRY " are the same string
184 ;; stored in different fixed-width fields. OCI drops trailing spaces
185 ;; for us in some cases but apparently not for fields of fixed
186 ;; character width, e.g.
188 ;; (dbi:sql "create table employees (name char(15), job char(15), city
189 ;; char(15), rate float)" :db orcl :types :auto)
190 ;; In order to map the "same string" property above onto Lisp equality,
191 ;; we drop trailing spaces in all cases:
193 (uffi:def-type string-array (:array :unsigned-char))
195 (defun deref-oci-string (arrayptr string-index size)
196 (declare (type string-array arrayptr))
197 (declare (type (mod #.+n-buf-rows+) string-index))
198 (declare (type (and unsigned-byte fixnum) size))
199 (let* ((raw (uffi:convert-from-foreign-string
201 (+ (uffi:pointer-address arrayptr) (* string-index size))
203 (trimmed (string-trim " " raw)))
204 (if (equal trimmed "NULL") nil trimmed)))
206 ;; the OCI library, part Z: no-longer used logic to convert from
207 ;; Oracle's binary date representation to Common Lisp's native date
211 (defvar +oci-date-bytes+ 7)
213 ;;; Return the INDEXth date in the OCI array, represented as
214 ;;; a Common Lisp "universal time" (i.e. seconds since 1900).
217 (defun deref-oci-date (arrayptr index)
218 (oci-date->universal-time (uffi:pointer-address
219 (uffi:deref-array arrayptr
220 '(:array :unsigned-char)
221 (* index +oci-date-bytes+)))))
223 (defun oci-date->universal-time (oci-date)
224 (declare (type (alien (* :unsigned-char)) oci-date))
225 (flet (;; a character from OCI-DATE, interpreted as an unsigned byte
227 (declare (type (mod #.+oci-date-bytes+) i))
228 (mod (uffi:deref-array oci-date string-array i) 256)))
229 (let* ((century (* (- (ub 0) 100) 100))
230 (year (+ century (- (ub 1) 100)))
235 (second (1- (ub 6))))
236 (encode-universal-time second minute hour day month year))))
239 (defmethod database-list-tables ((database oracle-database) &key owner)
243 "select user_tables.table_name from user_tables,all_tables where user_tables.table_name=all_tables.table_name and all_tables.owner='~:@(~A~)'"
245 "select table_name from user_tables")))
246 (mapcar #'car (database-query query database nil nil))))
249 (defmethod database-list-views ((database oracle-database) &key owner)
253 "select user_views.view_name from user_views,all_views where user_views.view_name=all_views.view_name and all_views.owner='~:@(~A~)'"
255 "select view_name from user_views")))
257 (database-query query database nil nil))))
259 (defmethod database-list-indexes ((database oracle-database)
264 "select user_indexes.index_name from user_indexes,all_indexes where user_indexes.index_name=all_indexes.index_name and all_indexes.owner='~:@(~A~)'"
266 "select index_name from user_indexes")))
267 (mapcar #'car (database-query query database nil nil))))
269 (defmethod database-list-table-indexes (table (database oracle-database)
274 "select user_indexes.index_name from user_indexes,all_indexes where user_indexes.table_name='~A' and user_indexes.index_name=all_indexes.index_name and all_indexes.owner='~:@(~A~)'"
276 (format nil "select index_name from user_indexes where table_name='~A'"
278 (mapcar #'car (database-query query database nil nil))))
280 (defmethod list-all-table-columns (table (db oracle-database))
281 (declare (string table))
282 (let* ((sql-stmt (concatenate
288 "user_tab_columns.COLUMN_NAME,"
289 "user_tab_columns.DATA_TYPE from user_tab_columns,"
290 "all_tables where all_tables.table_name = '" table "'"
291 " and user_tab_columns.table_name = '" table "'"))
292 (preresult (database-query sql-stmt db :auto nil)))
293 ;; PRERESULT is like RESULT except that it has a name instead of
294 ;; type codes in the fifth column of each row. To fix this, we
295 ;; destructively modify PRERESULT.
296 (dolist (preresult-row preresult)
297 (setf (fifth preresult-row)
298 (if (find (fifth preresult-row)
305 (defmethod database-list-attributes (table (database oracle-database) &key owner)
309 "select user_tab_columns.column_name from user_tab_columns,all_tables where user_tab_columns.table_name='~A' and all_tables.table_name=user_tab_columns.table_name and all_tables.owner='~:@(~A~)'"
312 "select column_name from user_tab_columns where table_name='~A'"
314 (mapcar #'car (database-query query database nil nil))))
316 (defmethod database-attribute-type (attribute (table string)
317 (database oracle-database)
322 "select data_type,data_length,data_scale,nullable from user_tab_columns,all_tables where user_tab_columns.table_name='~A' and column_name='~A' and all_tables.table_name=user_tab_columns.table_name and all_tables.owner='~:@(~A~)'"
323 table attribute owner)
325 "select data_type,data_length,data_scale,nullable from user_tab_columns where table_name='~A' and column_name='~A'"
327 (destructuring-bind (type length scale nullable) (car (database-query query database :auto nil))
328 (values (ensure-keyword type) length scale
329 (if (char-equal #\Y (schar nullable 0)) 1 0)))))
331 ;; Return one row of the table referred to by QC, represented as a
332 ;; list; or if there are no more rows, signal an error if EOF-ERRORP,
333 ;; or return EOF-VALUE otherwise.
335 ;; KLUDGE: This CASE statement is a strong sign that the code would be
336 ;; cleaner if CD were made into an abstract class, we made variant
337 ;; classes for CD-for-column-of-strings, CD-for-column-of-floats,
338 ;; etc., and defined virtual functions to handle operations like
339 ;; get-an-element-from-column. (For a small special purpose module
340 ;; like this, would arguably be overkill, so I'm not going to do it
341 ;; now, but if this code ends up getting more complicated in
342 ;; maintenance, it would become a really good idea.)
344 ;; Arguably this would be a good place to signal END-OF-FILE, but
345 ;; since the ANSI spec specifically says that END-OF-FILE means a
346 ;; STREAM which has no more data, and QC is not a STREAM, we signal
347 ;; DBI-ERROR instead.
349 (uffi:def-type short-array '(:array :short))
350 (uffi:def-type int-pointer '(* :int))
351 (uffi:def-type double-pointer '(* :double))
353 ;;; the result of a database query: a cursor through a table
354 (defstruct (oracle-result-set (:print-function print-query-cursor)
356 (:constructor %make-query-cursor))
357 (db (error "missing DB") ; db conn. this table is associated with
358 :type oracle-database
360 (stmthp (error "missing STMTHP") ; the statement handle used to create
361 ;; :type alien ; this table. owned by the QUERY-CURSOR
362 :read-only t) ; object, deallocated on CLOSE-QUERY
363 (cds) ; (error "missing CDS") ; column descriptors
364 ; :type (simple-array cd 1)
367 0 ; buffered rows: number of rows recv'd
368 :type (integer 0 #.+n-buf-rows+)) ; from the database on the last read
370 0 ; number of buffered rows returned, i.e.
371 :type (integer 0 #.+n-buf-rows+)) ; the index, within the buffered rows,
372 ; of the next row which hasn't already
375 0 ; total number of bytes recv'd from OCI
376 :type unsigned-byte) ; in all reads
377 (oci-end-seen-p nil)) ; Have we seen the end of OCI
378 ; data, i.e. OCI returning
379 ; less data than we requested?
380 ; OCI doesn't seem to like us
381 ; to try to read more data
382 ; from it after that..
385 (defun fetch-row (qc &optional (eof-errorp t) eof-value)
386 ;;(declare (optimize (speed 3)))
387 (cond ((zerop (qc-n-from-oci qc))
389 (error 'sql-database-error :message
390 (format nil "no more rows available in ~S" qc))
392 ((>= (qc-n-to-dbi qc)
394 (refill-qc-buffers qc)
395 (fetch-row qc nil eof-value))
397 (let ((cds (qc-cds qc))
398 (reversed-result nil)
399 (irow (qc-n-to-dbi qc)))
400 (dotimes (icd (length cds))
401 (let* ((cd (aref cds icd))
402 (b (foreign-resource-buffer (cd-buffer cd)))
404 (let* ((arb (foreign-resource-buffer (cd-indicators cd)))
405 (indicator (uffi:deref-array arb '(:array :short) irow)))
406 (declare (type short-array arb))
407 (unless (= indicator -1)
408 (ecase (cd-oci-data-type cd)
410 (deref-oci-string b irow (cd-sizeof cd)))
412 (uffi:deref-array b '(:array :double) irow))
414 (uffi:deref-array b '(:array :int) irow))
416 (deref-oci-string b irow (cd-sizeof cd))))))))
417 (when (and (eq :string (cd-result-type cd))
419 (not (stringp value)))
420 (setq value (write-to-string value)))
421 (push value reversed-result)))
422 (incf (qc-n-to-dbi qc))
423 (nreverse reversed-result)))))
425 (defun refill-qc-buffers (qc)
426 (with-slots (errhp) (qc-db qc)
427 (setf (qc-n-to-dbi qc) 0)
428 (cond ((qc-oci-end-seen-p qc)
429 (setf (qc-n-from-oci qc) 0))
431 (let ((oci-code (%oci-stmt-fetch
432 (deref-vp (qc-stmthp qc))
435 +oci-fetch-next+ +oci-default+)))
437 (#.+oci-success+ (values))
438 (#.+oci-no-data+ (setf (qc-oci-end-seen-p qc) t)
440 (#.+oci-error+ (handle-oci-error :database (qc-db qc)
442 (uffi:with-foreign-object (rowcount :long)
443 (oci-attr-get (deref-vp (qc-stmthp qc))
446 (uffi:make-null-pointer :unsigned-long)
449 (setf (qc-n-from-oci qc)
450 (- (uffi:deref-pointer rowcount :long)
451 (qc-total-n-from-oci qc)))
452 (when (< (qc-n-from-oci qc) +n-buf-rows+)
453 (setf (qc-oci-end-seen-p qc) t))
454 (setf (qc-total-n-from-oci qc)
455 (uffi:deref-pointer rowcount :long)))))
458 ;; the guts of the SQL function
460 ;; (like the SQL function, but with the QUERY argument hardwired to T, so
461 ;; that the return value is always a cursor instead of a list)
463 ;; Is this a SELECT statement? SELECT statements are handled
464 ;; specially by OCIStmtExecute(). (Non-SELECT statements absolutely
465 ;; require a nonzero iteration count, while the ordinary choice for a
466 ;; SELECT statement is a zero iteration count.
468 ;; SELECT statements are the only statements which return tables. We
469 ;; don't free STMTHP in this case, but instead give it to the new
470 ;; QUERY-CURSOR, and the new QUERY-CURSOR becomes responsible for
471 ;; freeing the STMTHP when it is no longer needed.
473 (defun sql-stmt-exec (sql-stmt-string db result-types field-names)
474 (with-slots (envhp svchp errhp)
476 (let ((stmthp (uffi:allocate-foreign-object :pointer-void)))
477 (uffi:with-foreign-object (stmttype :unsigned-short)
479 (oci-handle-alloc (deref-vp envhp)
481 +oci-htype-stmt+ 0 +null-void-pointer-pointer+)
482 (oci-stmt-prepare (deref-vp stmthp)
484 (uffi:convert-to-cstring sql-stmt-string)
485 (length sql-stmt-string)
486 +oci-ntv-syntax+ +oci-default+ :database db)
487 (oci-attr-get (deref-vp stmthp)
490 (uffi:make-null-pointer :unsigned-int)
494 (let* ((select-p (= (uffi:deref-pointer stmttype :unsigned-short) 1))
495 (iters (if select-p 0 1)))
497 (oci-stmt-execute (deref-vp svchp)
500 iters 0 +null-void-pointer+ +null-void-pointer+ +oci-default+
503 (make-query-cursor db stmthp result-types field-names))
505 (oci-handle-free (deref-vp stmthp) +oci-htype-stmt+)
509 ;; Return a QUERY-CURSOR representing the table returned from the OCI
510 ;; operation done through STMTHP. TYPES is the argument of the same
511 ;; name from the external SQL function, controlling type conversion
512 ;; of the returned arguments.
514 (defun make-query-cursor (db stmthp result-types field-names)
515 (let ((qc (%make-query-cursor :db db
517 :cds (make-query-cursor-cds db stmthp
520 (refill-qc-buffers qc)
524 ;; the hairy part of MAKE-QUERY-CURSOR: Ask OCI for information
525 ;; about table columns, translate the information into a Lisp
526 ;; vector of column descriptors, and return it.
528 ;; Allegro defines several flavors of type conversion, but this
529 ;; implementation only supports the :AUTO flavor.
531 ;; A note of explanation: OCI's internal number format uses 21
532 ;; bytes (42 decimal digits). 2 separate (?) one-byte fields,
533 ;; scale and precision, are used to deduce the nature of these
534 ;; 21 bytes. See pp. 3-10, 3-26, and 6-13 of OCI documentation
537 ;; When calling OCI C code to handle the conversion, we have
538 ;; only two numeric types available to pass the return value:
539 ;; double-float and signed-long. It would be possible to
540 ;; bypass the OCI conversion functions and write Lisp code
541 ;; which reads the 21-byte field directly and decodes
542 ;; it. However this is left as an exercise for the reader. :-)
544 ;; The following table describes the mapping, based on the implicit
545 ;; assumption that C's "signed long" type is a 32-bit integer.
547 ;; Internal Values SQL Type C Return Type
548 ;; =============== ======== =============
549 ;; Precision > 0 SCALE = -127 FLOAT --> double-float
550 ;; Precision > 0 && <=9 SCALE = 0 INTEGER --> signed-long
551 ;; Precision = 0 || > 9 SCALE = 0 BIG INTEGER --> double-float
552 ;; Precision > 0 SCALE > 0 DECIMAL --> double-float
554 ;; (OCI uses 1-based indexing here.)
556 ;; KLUDGE: This should work for all other data types except those
557 ;; which don't actually fit in their fixed-width field (BLOBs and the
558 ;; like). As Winton says, we (Cadabra) don't need to worry much about
559 ;; those, since we can't reason with them, so we don't use them. But
560 ;; for a more general application it'd be good to have a more
561 ;; selective and rigorously correct test here for whether we can
562 ;; actually handle the given DEREF-DTYPE value. -- WHN 20000106
564 ;; Note: The OCI documentation doesn't seem to say whether the COLNAME
565 ;; value returned here is a newly-allocated copy which we're
566 ;; responsible for freeing, or a pointer into some system copy which
567 ;; will be freed when the system itself is shut down. But judging
568 ;; from the way that the result is used in the cdemodsa.c example
569 ;; program, it looks like the latter: we should make our own copy of
570 ;; the value, but not try to free it.
572 ;; WORKAROUND: OCI seems to return ub2 values for the
573 ;; +oci-attr-data-size+ attribute even though its documentation claims
574 ;; that it returns a ub4, and even though the associated "sizep" value
575 ;; is 4, not 2. In order to make the code here work reliably, without
576 ;; having to patch it later if OCI is ever fixed to match its
577 ;; documentation, we pre-zero COLSIZE before making the call into OCI.
579 ;; To exercise the weird OCI behavior (thereby blowing up the code
580 ;; below, beware!) try setting this value into COLSIZE, calling OCI,
581 ;; then looking at the value in COLSIZE. (setf colsize #x12345678)
585 (defun make-query-cursor-cds (database stmthp result-types field-names)
586 (declare (optimize (safety 3) #+nil (speed 3))
587 (type oracle-database database)
588 (type pointer-pointer-void stmthp))
589 (with-slots (errhp) database
590 (uffi:with-foreign-objects ((dtype-foreign :unsigned-short)
591 (parmdp ':pointer-void)
594 (colname '(* :unsigned-char))
595 (colnamelen :unsigned-long)
596 (colsize :unsigned-long)
597 (colsizesize :unsigned-long)
598 (defnp ':pointer-void))
601 (do ((icolumn 0 (1+ icolumn))
602 (cds-as-reversed-list nil))
603 ((not (eql (oci-param-get (deref-vp stmthp)
607 (1+ icolumn) :database database)
609 (coerce (reverse cds-as-reversed-list) 'simple-vector))
610 ;; Decode type of ICOLUMNth column into a type we're prepared to
612 (oci-attr-get (deref-vp parmdp)
615 (uffi:make-null-pointer :unsigned-int)
618 (let ((dtype (uffi:deref-pointer dtype-foreign :unsigned-short)))
621 (setf buffer (acquire-foreign-resource :unsigned-char
622 (* 32 +n-buf-rows+)))
623 (setf sizeof 32 dtype #.SQLT-STR))
625 (oci-attr-get (deref-vp parmdp)
628 (uffi:make-null-pointer :unsigned-int)
631 (oci-attr-get (deref-vp parmdp)
634 (uffi:make-null-pointer :unsigned-int)
637 (let ((*scale (uffi:deref-pointer scale :byte))
638 (*precision (uffi:deref-pointer precision :byte)))
639 ;;(format t "scale=~d, precision=~d~%" *scale *precision)
642 (and (minusp *scale) (< *precision 10)))
643 (setf buffer (acquire-foreign-resource :int +n-buf-rows+)
644 sizeof 4 ;; sizeof(int)
647 (setf buffer (acquire-foreign-resource :double +n-buf-rows+)
648 sizeof 8 ;; sizeof(double)
649 dtype #.SQLT-FLT)))) )
650 ;; Default to SQL-STR
652 (setf (uffi:deref-pointer colsize :unsigned-long) 0
654 (oci-attr-get (deref-vp parmdp)
657 (uffi:make-null-pointer :unsigned-int) ;; (uffi:pointer-address colsizesize)
660 (let ((colsize-including-null (1+ (uffi:deref-pointer colsize :unsigned-long))))
661 (setf buffer (acquire-foreign-resource
662 :unsigned-char (* +n-buf-rows+ colsize-including-null)))
663 (setf sizeof colsize-including-null))))
664 (let ((retcodes (acquire-foreign-resource :unsigned-short +n-buf-rows+))
665 (indicators (acquire-foreign-resource :short +n-buf-rows+))
668 (oci-attr-get (deref-vp parmdp)
674 (setq colname-string (uffi:convert-from-foreign-string
675 (uffi:deref-pointer colname '(* :unsigned-char))
676 :length (uffi:deref-pointer colnamelen :unsigned-long))))
677 (push (make-cd :name colname-string
682 :indicators indicators
684 ((consp result-types)
685 (nth icolumn result-types))
690 cds-as-reversed-list)
691 (oci-define-by-pos (deref-vp stmthp)
694 (1+ icolumn) ; OCI 1-based indexing again
695 (uffi:with-cast-pointer (vp (foreign-resource-buffer buffer) :void)
699 (uffi:with-cast-pointer (vp (foreign-resource-buffer indicators) :void)
701 (uffi:make-null-pointer :unsigned-short)
702 (uffi:with-cast-pointer (vp (foreign-resource-buffer retcodes) :unsigned-short)
704 +oci-default+))))))))
706 ;; Release the resources associated with a QUERY-CURSOR.
708 (defun close-query (qc)
709 (oci-handle-free (deref-vp (qc-stmthp qc)) +oci-htype-stmt+)
710 (let ((cds (qc-cds qc)))
711 (dotimes (i (length cds))
712 (release-cd-resources (aref cds i))))
716 ;; Release the resources associated with a column description.
718 (defun release-cd-resources (cd)
719 (free-foreign-resource (cd-buffer cd))
720 (free-foreign-resource (cd-retcodes cd))
721 (free-foreign-resource (cd-indicators cd))
725 (defmethod database-name-from-spec (connection-spec (database-type (eql :oracle)))
726 (check-connection-spec connection-spec database-type (dsn user password))
727 (destructuring-bind (dsn user password) connection-spec
728 (declare (ignore password))
729 (concatenate 'string dsn "/" user)))
732 (defmethod database-connect (connection-spec (database-type (eql :oracle)))
733 (check-connection-spec connection-spec database-type (dsn user password))
734 (destructuring-bind (data-source-name user password)
736 (let ((envhp (uffi:allocate-foreign-object :pointer-void))
737 (errhp (uffi:allocate-foreign-object :pointer-void))
738 (svchp (uffi:allocate-foreign-object :pointer-void))
739 (srvhp (uffi:allocate-foreign-object :pointer-void)))
740 ;; Requests to allocate environments and handles should never
741 ;; fail in normal operation, and they're done too early to
742 ;; handle errors very gracefully (since they're part of the
743 ;; error-handling mechanism themselves) so we just assert they
745 (setf (deref-vp envhp) +null-void-pointer+)
748 (oci-env-create envhp +oci-default+ +null-void-pointer+
749 +null-void-pointer+ +null-void-pointer+
750 +null-void-pointer+ 0 +null-void-pointer-pointer+)
751 (oci-handle-alloc envhp
754 +null-void-pointer-pointer+))
757 (oci-initialize +oci-object+ +null-void-pointer+ +null-void-pointer+
758 +null-void-pointer+ +null-void-pointer-pointer+)
759 (ignore-errors (oci-handle-alloc +null-void-pointer+ envhp
761 +null-void-pointer-pointer+)) ;no testing return
762 (oci-env-init envhp +oci-default+ 0 +null-void-pointer-pointer+)
763 (oci-handle-alloc (deref-vp envhp) errhp
764 +oci-htype-error+ 0 +null-void-pointer-pointer+)
765 (oci-handle-alloc (deref-vp envhp) srvhp
766 +oci-htype-server+ 0 +null-void-pointer-pointer+)
767 (uffi:with-cstring (dblink nil)
768 (oci-server-attach (deref-vp srvhp)
772 (oci-handle-alloc (deref-vp envhp) svchp
773 +oci-htype-svcctx+ 0 +null-void-pointer-pointer+)
774 (oci-attr-set (deref-vp svchp)
776 (deref-vp srvhp) 0 +oci-attr-server+
778 ;; oci-handle-alloc((dvoid *)encvhp, (dvoid **)&stmthp, OCI_HTYPE_STMT, 0, 0);
781 (let (db server-version)
782 (uffi:with-foreign-object (buf '(:array :unsigned-char #.+errbuf-len+))
783 (oci-server-version (deref-vp svchp)
785 (uffi:char-array-to-pointer buf)
786 +errbuf-len+ +oci-htype-svcctx+)
787 (setf server-version (uffi:convert-from-foreign-string buf)))
788 (setq db (make-instance 'oracle-database
789 :name (database-name-from-spec connection-spec
793 :database-type :oracle
795 :dsn data-source-name
797 :server-version server-version
798 :major-version-number (major-version-from-string
801 (oci-logon (deref-vp envhp)
804 (uffi:convert-to-cstring user) (length user)
805 (uffi:convert-to-cstring password) (length password)
806 (uffi:convert-to-cstring data-source-name) (length data-source-name)
808 ;; :date-format-length (1+ (length date-format)))))
809 (setf (slot-value db 'clsql-sys::state) :open)
810 (database-execute-command
811 (format nil "alter session set NLS_DATE_FORMAT='~A'" (date-format db)) db)
815 (defun major-version-from-string (str)
817 ((search " 10g " str)
819 ((search "Oracle9i " str)
823 ;; Close a database connection.
825 (defmethod database-disconnect ((database oracle-database))
826 (osucc (oci-logoff (deref-vp (svchp database))
827 (deref-vp (errhp database))))
828 (osucc (oci-handle-free (deref-vp (envhp database)) +oci-htype-env+))
829 ;; Note: It's neither required nor allowed to explicitly deallocate the
830 ;; ERRHP handle here, since it's owned by the ENVHP deallocated above,
831 ;; and was therefore automatically deallocated at the same time.
834 ;;; Do the database operation described in SQL-STMT-STRING on database
835 ;;; DB and, if the command is a SELECT, return a representation of the
836 ;;; resulting table. The representation of the table is controlled by the
838 ;;; * If QUERY is NIL, the table is returned as a list of rows, with
839 ;;; each row represented by a list.
840 ;;; * If QUERY is non-NIL, the result is returned as a QUERY-CURSOR
841 ;;; suitable for FETCH-ROW and CLOSE-QUERY
842 ;;; The TYPES argument controls the type conversion method used
843 ;;; to construct the table. The Allegro version supports several possible
844 ;;; values for this argument, but we only support :AUTO.
846 (defmethod database-query (query-expression (database oracle-database) result-types field-names)
847 (let ((cursor (sql-stmt-exec query-expression database result-types field-names)))
848 ;; (declare (type (or query-cursor null) cursor))
849 (if (null cursor) ; No table was returned.
851 (do ((reversed-result nil))
853 (let* ((eof-value :eof)
854 (row (fetch-row cursor nil eof-value)))
855 (when (eq row eof-value)
858 (return (values (nreverse reversed-result)
859 (loop for cd across (qc-cds cursor)
860 collect (cd-name cd))))
861 (return (nreverse reversed-result))))
862 (push row reversed-result))))))
865 (defmethod database-create-sequence
866 (sequence-name (database oracle-database))
868 (concatenate 'string "CREATE SEQUENCE "
869 (sql-escape sequence-name))
872 (defmethod database-drop-sequence
873 (sequence-name (database oracle-database))
875 (concatenate 'string "DROP SEQUENCE "
876 (sql-escape sequence-name))
879 (defmethod database-sequence-next (sequence-name (database oracle-database))
882 (concatenate 'string "SELECT "
883 (sql-escape sequence-name)
886 database :auto nil)))
888 (defmethod database-set-sequence-position (name position database)
889 (let* ((next (database-sequence-next name database))
890 (incr (- position next)))
891 (database-execute-command
892 (format nil "ALTER SEQUENCE ~A INCREMENT BY ~D" name incr)
894 (database-sequence-next name database)
895 (database-execute-command
896 (format nil "ALTER SEQUENCE ~A INCREMENT BY 1" name)
899 (defmethod database-list-sequences ((database oracle-database) &key owner)
903 "select user_sequences.sequence_name from user_sequences,all_sequences where user_sequences.sequence_name=all_sequences.sequence_name and all_sequences.sequence_owner='~:@(~A~)'"
905 "select sequence_name from user_sequences")))
906 (mapcar #'car (database-query query database nil nil))))
908 (defmethod database-execute-command (sql-expression (database oracle-database))
909 (database-query sql-expression database nil nil)
911 (database-query "commit" database nil nil)
915 (defstruct (cd (:constructor make-cd)
916 (:print-function print-cd))
917 "a column descriptor: metadata about the data in a table"
919 ;; name of this column
920 (name (error "missing NAME") :type simple-string :read-only t)
921 ;; the size in bytes of a single element
922 (sizeof (error "missing SIZE") :type fixnum :read-only t)
923 ;; an array of +N-BUF-ROWS+ elements in C representation
924 (buffer (error "Missing BUFFER")
925 :type foreign-resource
927 ;; an array of +N-BUF-ROWS+ OCI return codes in C representation.
928 ;; (There must be one return code for every element of every
929 ;; row in order to be able to represent nullness.)
930 (retcodes (error "Missing RETCODES")
931 :type foreign-resource
933 (indicators (error "Missing INDICATORS")
934 :type foreign-resource
936 ;; the OCI code for the data type of a single element
937 (oci-data-type (error "missing OCI-DATA-TYPE")
940 (result-type (error "missing RESULT-TYPE")
944 (defun print-cd (cd stream depth)
945 (declare (ignore depth))
946 (print-unreadable-object (cd stream :type t)
948 ":NAME ~S :OCI-DATA-TYPE ~S :OCI-DATA-SIZE ~S"
950 (cd-oci-data-type cd)
953 (defun print-query-cursor (qc stream depth)
954 (declare (ignore depth))
955 (print-unreadable-object (qc stream :type t :identity t)
956 (prin1 (qc-db qc) stream)))
959 (defmethod database-query-result-set ((query-expression string)
960 (database oracle-database)
961 &key full-set result-types)
962 (let ((cursor (sql-stmt-exec query-expression database result-types nil)))
964 (values cursor (length (qc-cds cursor)) nil)
965 (values cursor (length (qc-cds cursor))))))
968 (defmethod database-dump-result-set (result-set (database oracle-database))
969 (close-query result-set))
971 (defmethod database-store-next-row (result-set (database oracle-database) list)
972 (let* ((eof-value :eof)
973 (row (fetch-row result-set nil eof-value)))
974 (unless (eq eof-value row)
975 (loop for i from 0 below (length row)
976 do (setf (nth i list) (nth i row)))
979 (defmethod clsql-sys:database-start-transaction ((database oracle-database))
982 ;;(with-slots (svchp errhp) database
983 ;; (osucc (oci-trans-start (uffi:deref-pointer svchp)
984 ;; (uffi:deref-pointer errhp)
986 ;; +oci-trans-new+)))
990 (defmethod clsql-sys:database-commit-transaction ((database oracle-database))
992 (with-slots (svchp errhp) database
993 (osucc (oci-trans-commit (deref-vp svchp)
998 (defmethod clsql-sys:database-abort-transaction ((database oracle-database))
1000 (osucc (oci-trans-rollback (deref-vp (svchp database))
1001 (deref-vp (errhp database))
1005 (defparameter *constraint-types*
1006 '(("NOT-NULL" . "NOT NULL")))
1008 (defmethod database-output-sql ((str string) (database oracle-database))
1009 (if (and (null (position #\' str))
1010 (null (position #\\ str)))
1011 (format nil "'~A'" str)
1012 (let* ((l (length str))
1013 (buf (make-string (+ l 3))))
1014 (setf (aref buf 0) #\')
1017 ((= i l) (setf (aref buf j) #\'))
1018 (if (= j (- (length buf) 1))
1019 (setf buf (adjust-array buf (+ (length buf) 1))))
1020 (cond ((eql (aref str i) #\')
1021 (setf (aref buf j) #\')
1023 (setf (aref buf j) (aref str i)))
1029 (defmethod db-type-has-bigint? ((type (eql :oracle)))
1032 (defmethod db-type-has-fancy-math? ((db-type (eql :oracle)))
1035 (defmethod db-type-has-boolean-where? ((db-type (eql :oracle)))
1038 (when (clsql-sys:database-type-library-loaded :oracle)
1039 (clsql-sys:initialize-database-type :database-type :oracle))