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 ;;;; KLUDGE: The original prototype of this code was implemented using
23 ;;;; lots of special variables holding MAKE-ALIEN values. When I was
24 ;;;; first converting it to use WITH-ALIEN variables, I was confused
25 ;;;; about the behavior of MAKE-ALIEN and WITH-ALIEN; I thought that
26 ;;;; (MAKE-ALIEN TYPEFOO) returned the same type of object as is bound
27 ;;;; to the name BAR by (WITH-ALIEN ((BAR TYPEFOO)) ..). In fact the
28 ;;;; value returned by MAKE-ALIEN has an extra level of indirection
29 ;;;; relative to the value bound by WITH-ALIEN, i.e. (DEREF
30 ;;;; (MAKE-ALIEN TYPEFOO)) has the same type as the value bound to the
31 ;;;; name BAR by (WITH-ALIEN ((BAR TYPEFOO)) ..). Laboring under my
32 ;;;; misunderstanding, I was unable to use ordinary scalars bound by
33 ;;;; WITH-ALIEN, and I ended up giving up and deciding to work around
34 ;;;; this apparent bug in CMUCL by using 1-element arrays instead.
35 ;;;; This "workaround" for my misunderstanding is obviously unnecessary
36 ;;;; and confusing, but still remains in the code. -- WHN 20000106
39 ;;;; arbitrary parameters, tunable for performance or other reasons
41 (uffi:def-foreign-type void-pointer (* :void))
43 (eval-when (:compile-toplevel :load-toplevel :execute)
44 (defconstant +errbuf-len+ 512
45 "the number of characters that we allocate for an error message buffer")
46 (defconstant +n-buf-rows+ 200
47 "the number of table rows that we buffer at once when reading a table.
48 CMUCL has a compiled-in limit on how much C data can be allocated
49 (through malloc() and friends) at any given time, typically 8 Mb.
50 Setting this constant to a moderate value should make it less
51 likely that we'll have to worry about the CMUCL limit."))
54 ;;; utilities for mucking around with C-level stuff
56 ;; Return the address of ALIEN-OBJECT (like the C operator "&").
58 ;; The INDICES argument is useful to give the ALIEN-OBJECT the
59 ;; expected number of zero indices, especially when we have a bunch of
60 ;; 1-element arrays running around due to the workaround for the CMUCL
61 ;; 18b WITH-ALIEN scalar bug.
63 (defmacro c-& (alien-object type)
64 `(uffi:pointer-address (uffi:deref-pointer ,alien-object ,type)))
66 ;; constants - from OCI?
68 (defconstant +var-not-in-list+ 1007)
69 (defconstant +no-data-found+ 1403)
70 (defconstant +null-value-returned+ 1405)
71 (defconstant +field-truncated+ 1406)
73 (eval-when (:compile-toplevel :load-toplevel :execute)
74 (defconstant SQLT-INT 3)
75 (defconstant SQLT-STR 5)
76 (defconstant SQLT-FLT 4)
77 (defconstant SQLT-DATE 12))
79 ;;; Note that despite the suggestive class name (and the way that the
80 ;;; *DEFAULT-DATABASE* variable holds an object of this class), a DB
81 ;;; object is not actually a database but is instead a connection to a
82 ;;; database. Thus, there's no obstacle to having any number of DB
83 ;;; objects referring to the same database.
85 (uffi:def-type pointer-pointer-void '(* (* :void)))
87 (defclass oracle-database (database) ; was struct db
91 :type pointer-pointer-void
93 "OCI environment handle")
97 :type pointer-pointer-void
103 :type pointer-pointer-void
105 "OCI service context handle")
110 "optional data source name (used only for debugging/printing)")
116 "the \"user\" value given when data source connection was made")
118 :initarg :date-format
120 :initform "YYYY-MM-DD HH24:MI:SS\"+00\"")
124 "Each database connection can be configured with its own date
125 output format. In order to extract date strings from output buffers
126 holding multiple date strings in fixed-width fields, we need to know
127 the length of that format.")))
130 ;;; Handle the messy case of return code=+oci-error+, querying the
131 ;;; system for subcodes and reporting them as appropriate. ERRHP and
132 ;;; NULLS-OK are as in the OERR function.
134 (defun handle-oci-error (&key database nulls-ok)
138 (uffi:with-foreign-objects ((errbuf (:array :unsigned-char #.+errbuf-len+))
140 (setf (uffi:deref-array errbuf '(:array :unsigned-char) 0) (code-char 0)) ; i.e. init to empty string
141 (setf (uffi:deref-pointer errcode :long) 0)
142 (oci-error-get (uffi:deref-pointer errhp void-pointer) 1
143 (uffi:make-null-pointer :unsigned-char)
144 errcode errbuf +errbuf-len+ +oci-htype-error+)
145 (let ((subcode (uffi:deref-pointer errcode :long)))
146 (unless (and nulls-ok (= subcode +null-value-returned+))
147 (error 'clsql-sql-error
151 :error (uffi:convert-from-foreign-string errbuf)))))))
153 (error 'clsql-sql-error
155 :message "can't handle NULLS-OK without ERRHP"))
157 (error 'clsql-sql-error
159 :message "OCI Error (and no ERRHP available to find subcode)"))))
161 ;;; Require an OCI success code.
163 ;;; (The ordinary OCI error reporting mechanisms uses a fair amount of
164 ;;; machinery (environments and other handles). In order to get to
165 ;;; where we can use these mechanisms, we have to be able to allocate
166 ;;; the machinery. The functions for allocating the machinery can
167 ;;; return errors (e.g. out of memory) but shouldn't. Wrapping this function
168 ;;; around function calls to such have-to-succeed functions enforces
172 (declare (type fixnum code))
173 (unless (= code +oci-success+)
175 :format-control "unexpected OCI failure, code=~S"
176 :format-arguments (list code))))
179 ;;; Enabling this can be handy for low-level debugging.
182 (trace oci-initialize #+oci-8-1-5 oci-env-create oci-handle-alloc oci-logon
183 oci-error-get oci-stmt-prepare oci-stmt-execute
184 oci-param-get oci-logon oci-attr-get oci-define-by-pos oci-stmt-fetch)
185 (setf debug::*debug-print-length* nil))
188 ;;;; the OCI library, part V: converting from OCI representations to Lisp
191 ;; Return the INDEXth string of the OCI array, represented as Lisp
192 ;; SIMPLE-STRING. SIZE is the size of the fixed-width fields used by
193 ;; Oracle to store strings within the array.
195 ;; In the wild world of databases, trailing spaces aren't generally
196 ;; significant, since e.g. "LARRY " and "LARRY " are the same string
197 ;; stored in different fixed-width fields. OCI drops trailing spaces
198 ;; for us in some cases but apparently not for fields of fixed
199 ;; character width, e.g.
201 ;; (dbi:sql "create table employees (name char(15), job char(15), city
202 ;; char(15), rate float)" :db orcl :types :auto)
203 ;; In order to map the "same string" property above onto Lisp equality,
204 ;; we drop trailing spaces in all cases:
206 (uffi:def-type string-pointer (* :unsigned-char))
208 (defun deref-oci-string (arrayptr string-index size)
209 (declare (type string-pointer arrayptr))
210 (declare (type (mod #.+n-buf-rows+) string-index))
211 (declare (type (and unsigned-byte fixnum) size))
212 (let* ((raw (uffi:convert-from-foreign-string
213 (+ (uffi:pointer-address arrayptr) (* string-index size))))
214 (trimmed (string-trim " " raw)))
215 (if (equal trimmed "NULL") nil trimmed)))
217 ;; the OCI library, part Z: no-longer used logic to convert from
218 ;; Oracle's binary date representation to Common Lisp's native date
222 (defvar +oci-date-bytes+ 7)
224 ;;; Return the INDEXth date in the OCI array, represented as
225 ;;; a Common Lisp "universal time" (i.e. seconds since 1900).
228 (defun deref-oci-date (arrayptr index)
229 (oci-date->universal-time (uffi:pointer-address (uffi:deref-array arrayptr '(:array :unsigned-char)
230 (* index +oci-date-bytes+)))))
232 (defun oci-date->universal-time (oci-date)
233 (declare (type (alien (* :unsigned-char)) oci-date))
234 (flet (;; a character from OCI-DATE, interpreted as an unsigned byte
236 (declare (type (mod #.+oci-date-bytes+) i))
237 (mod (uffi:deref-array oci-date string-pointer i) 256)))
238 (let* ((century (* (- (ub 0) 100) 100))
239 (year (+ century (- (ub 1) 100)))
244 (second (1- (ub 6))))
245 (encode-universal-time second minute hour day month year))))
247 ;; Return (VALUES ALL-TABLES COLUMN-NAMES), where ALL-TABLES is a
248 ;; table containing one row for each table available in DB, and
249 ;; COLUMN-NAMES is a list of header names for the columns in
252 ;; The Allegro version also accepted a HSTMT argument.
254 ;(defmethod database-list-tables ((db oracle-database))
255 ; (sql:query "select '',OWNER,TABLE_NAME,TABLE_TYPE,'' from all_catalog"))
258 (defmethod list-all-user-database-tables ((db oracle-database))
260 (setf db clsql:*default-database*))
261 (values (database-query "select TABLE_NAME from all_catalog
262 where owner <> 'PUBLIC' and owner <> 'SYSTEM' and owner <> 'SYS'"
266 (defmethod database-list-tables ((database oracle-database)
267 &key (system-tables nil) owner)
269 (database-query "select table_name from all_catalog" database nil nil)
270 (database-query "select table_name from all_catalog where owner <> 'PUBLIC' and owner <> 'SYSTEM' and owner <> 'SYS'"
273 ;; Return a list of all columns in TABLE.
275 ;; The Allegro version of this also returned a second value.
277 (defmethod list-all-table-columns (table (db oracle-database))
278 (declare (type string table))
280 (setf db clsql:*default-database*))
281 (let* ((sql-stmt (concatenate
287 "user_tab_columns.COLUMN_NAME,"
288 "user_tab_columns.DATA_TYPE from user_tab_columns,"
289 "all_tables where all_tables.table_name = '" table "'"
290 " and user_tab_columns.table_name = '" table "'"))
291 (preresult (sql sql-stmt :db db :types :auto)))
292 ;; PRERESULT is like RESULT except that it has a name instead of
293 ;; type codes in the fifth column of each row. To fix this, we
294 ;; destructively modify PRERESULT.
295 (dolist (preresult-row preresult)
296 (setf (fifth preresult-row)
297 (if (find (fifth preresult-row)
304 (defmethod database-list-attributes (table (database oracle-database) &key owner)
305 (let* ((relname (etypecase table
306 (clsql-sys::sql-ident
308 (symbol-name (slot-value table 'clsql-sys::name))))
313 "select user_tab_columns,column_name from user_tab_columns where user_tab_columns.table_name=~A"
319 ;; Return one row of the table referred to by QC, represented as a
320 ;; list; or if there are no more rows, signal an error if EOF-ERRORP,
321 ;; or return EOF-VALUE otherwise.
323 ;; KLUDGE: This CASE statement is a strong sign that the code would be
324 ;; cleaner if CD were made into an abstract class, we made variant
325 ;; classes for CD-for-column-of-strings, CD-for-column-of-floats,
326 ;; etc., and defined virtual functions to handle operations like
327 ;; get-an-element-from-column. (For a small special purpose module
328 ;; like this, would arguably be overkill, so I'm not going to do it
329 ;; now, but if this code ends up getting more complicated in
330 ;; maintenance, it would become a really good idea.)
332 ;; Arguably this would be a good place to signal END-OF-FILE, but
333 ;; since the ANSI spec specifically says that END-OF-FILE means a
334 ;; STREAM which has no more data, and QC is not a STREAM, we signal
335 ;; DBI-ERROR instead.
337 (uffi:def-type short-pointer '(* :short))
338 (uffi:def-type double-pointer '(* :double))
340 ;;; the result of a database query: a cursor through a table
341 (defstruct (oracle-result-set (:print-function print-query-cursor)
343 (:constructor %make-query-cursor))
344 (db (error "missing DB") ; db conn. this table is associated with
347 (stmthp (error "missing STMTHP") ; the statement handle used to create
348 ;; :type alien ; this table. owned by the QUERY-CURSOR
349 :read-only t) ; object, deallocated on CLOSE-QUERY
350 (cds) ; (error "missing CDS") ; column descriptors
351 ; :type (simple-array cd 1)
354 0 ; buffered rows: number of rows recv'd
355 :type (integer 0 #.+n-buf-rows+)) ; from the database on the last read
357 0 ; number of buffered rows returned, i.e.
358 :type (integer 0 #.+n-buf-rows+)) ; the index, within the buffered rows,
359 ; of the next row which hasn't already
362 0 ; total number of bytes recv'd from OCI
363 :type unsigned-byte) ; in all reads
364 (oci-end-seen-p nil)) ; Have we seen the end of OCI
365 ; data, i.e. OCI returning
366 ; less data than we requested?
367 ; OCI doesn't seem to like us
368 ; to try to read more data
369 ; from it after that..
372 (defun fetch-row (qc &optional (eof-errorp t) eof-value)
373 ;;(declare (optimize (speed 3)))
374 (cond ((zerop (qc-n-from-oci qc))
376 (error 'clsql-error :message
377 (format nil "no more rows available in ~S" qc))
379 ((>= (qc-n-to-dbi qc)
381 (refill-qc-buffers qc)
382 (fetch-row qc nil eof-value))
384 (let ((cds (qc-cds qc))
385 (reversed-result nil)
386 (irow (qc-n-to-dbi qc)))
387 (dotimes (icd (length cds))
388 (let* ((cd (aref cds icd))
389 (b (foreign-resource-buffer (cd-buffer cd)))
391 (let ((arb (foreign-resource-buffer (cd-indicators cd))))
392 (declare (type short-pointer arb))
393 (unless (= (uffi:deref-array arb '(:array :int) irow) -1)
394 (ecase (cd-oci-data-type cd)
395 (#.SQLT-STR (deref-oci-string b irow (cd-sizeof cd)))
396 (#.SQLT-FLT (uffi:deref-array b '(:array :double) irow))
397 (#.SQLT-INT (uffi:deref-array b '(:array :int) irow))
398 (#.SQLT-DATE (deref-oci-string b irow (cd-sizeof cd))))))))
399 (push value reversed-result)))
400 (incf (qc-n-to-dbi qc))
401 (nreverse reversed-result)))))
403 (defun refill-qc-buffers (qc)
406 (setf (qc-n-to-dbi qc) 0)
407 (cond ((qc-oci-end-seen-p qc)
408 (setf (qc-n-from-oci qc) 0))
410 (let ((oci-code (%oci-stmt-fetch (uffi:deref-pointer (qc-stmthp qc) void-pointer)
411 (uffi:deref-pointer errhp void-pointer)
413 +oci-fetch-next+ +oci-default+)))
415 (#.+oci-success+ (values))
416 (#.+oci-no-data+ (setf (qc-oci-end-seen-p qc) t)
418 (#.+oci-error+ (handle-oci-error :database (qc-db qc)
420 (uffi:with-foreign-object (rowcount :long)
421 (oci-attr-get (uffi:deref-pointer (qc-stmthp qc) void-pointer) +oci-htype-stmt+
423 (uffi:make-null-pointer :unsigned-long)
425 (uffi:deref-pointer errhp void-pointer))
426 (setf (qc-n-from-oci qc)
427 (- (uffi:deref-pointer rowcount :long) (qc-total-n-from-oci qc)))
428 (when (< (qc-n-from-oci qc) +n-buf-rows+)
429 (setf (qc-oci-end-seen-p qc) t))
430 (setf (qc-total-n-from-oci qc)
431 (uffi:deref-pointer rowcount :long)))))
434 ;; the guts of the SQL function
436 ;; (like the SQL function, but with the QUERY argument hardwired to T, so
437 ;; that the return value is always a cursor instead of a list)
439 ;; Is this a SELECT statement? SELECT statements are handled
440 ;; specially by OCIStmtExecute(). (Non-SELECT statements absolutely
441 ;; require a nonzero iteration count, while the ordinary choice for a
442 ;; SELECT statement is a zero iteration count.
444 ;; SELECT statements are the only statements which return tables. We
445 ;; don't free STMTHP in this case, but instead give it to the new
446 ;; QUERY-CURSOR, and the new QUERY-CURSOR becomes responsible for
447 ;; freeing the STMTHP when it is no longer needed.
449 (defun sql-stmt-exec (sql-stmt-string db &key types)
450 (with-slots (envhp svchp errhp)
452 (let ((stmthp (uffi:allocate-foreign-object void-pointer)))
453 (uffi:with-foreign-object (stmttype :unsigned-short)
455 (oci-handle-alloc (uffi:deref-pointer envhp void-pointer)
457 +oci-htype-stmt+ 0 +null-void-pointer-pointer+)
458 (oci-stmt-prepare (uffi:deref-pointer stmthp void-pointer)
459 (uffi:deref-pointer errhp void-pointer)
460 (uffi:convert-to-cstring sql-stmt-string)
461 (length sql-stmt-string)
462 +oci-ntv-syntax+ +oci-default+ :database db)
463 (oci-attr-get (uffi:deref-pointer stmthp void-pointer)
466 (uffi:make-null-pointer :unsigned-int)
468 (uffi:deref-pointer errhp void-pointer)
470 (let* ((select-p (= (uffi:deref-pointer stmttype :unsigned-short) 1))
471 (iters (if select-p 0 1)))
473 (oci-stmt-execute (uffi:deref-pointer svchp void-pointer)
474 (uffi:deref-pointer stmthp void-pointer)
475 (uffi:deref-pointer errhp void-pointer)
476 iters 0 +null-void-pointer+ +null-void-pointer+ +oci-default+
479 (make-query-cursor db stmthp types))
481 (oci-handle-free (uffi:deref-pointer stmthp void-pointer) +oci-htype-stmt+)
485 ;; Return a QUERY-CURSOR representing the table returned from the OCI
486 ;; operation done through STMTHP. TYPES is the argument of the same
487 ;; name from the external SQL function, controlling type conversion
488 ;; of the returned arguments.
490 (defun make-query-cursor (db stmthp types)
491 (let ((qc (%make-query-cursor :db db
493 :cds (make-query-cursor-cds db stmthp types))))
494 (refill-qc-buffers qc)
498 ;; the hairy part of MAKE-QUERY-CURSOR: Ask OCI for information
499 ;; about table columns, translate the information into a Lisp
500 ;; vector of column descriptors, and return it.
502 ;; Allegro defines several flavors of type conversion, but this
503 ;; implementation only supports the :AUTO flavor.
505 ;; A note of explanation: OCI's internal number format uses 21
506 ;; bytes (42 decimal digits). 2 separate (?) one-byte fields,
507 ;; scale and precision, are used to deduce the nature of these
508 ;; 21 bytes. See pp. 3-10, 3-26, and 6-13 of OCI documentation
511 ;; When calling OCI C code to handle the conversion, we have
512 ;; only two numeric types available to pass the return value:
513 ;; double-float and signed-long. It would be possible to
514 ;; bypass the OCI conversion functions and write Lisp code
515 ;; which reads the 21-byte field directly and decodes
516 ;; it. However this is left as an exercise for the reader. :-)
518 ;; The following table describes the mapping, based on the implicit
519 ;; assumption that C's "signed long" type is a 32-bit integer.
521 ;; Internal Values SQL Type C Return Type
522 ;; =============== ======== =============
523 ;; Precision > 0 SCALE = -127 FLOAT --> double-float
524 ;; Precision > 0 && <=9 SCALE = 0 INTEGER --> signed-long
525 ;; Precision = 0 || > 9 SCALE = 0 BIG INTEGER --> double-float
526 ;; Precision > 0 SCALE > 0 DECIMAL --> double-float
528 ;; (OCI uses 1-based indexing here.)
530 ;; KLUDGE: This should work for all other data types except those
531 ;; which don't actually fit in their fixed-width field (BLOBs and the
532 ;; like). As Winton says, we (Cadabra) don't need to worry much about
533 ;; those, since we can't reason with them, so we don't use them. But
534 ;; for a more general application it'd be good to have a more
535 ;; selective and rigorously correct test here for whether we can
536 ;; actually handle the given DEREF-DTYPE value. -- WHN 20000106
538 ;; Note: The OCI documentation doesn't seem to say whether the COLNAME
539 ;; value returned here is a newly-allocated copy which we're
540 ;; responsible for freeing, or a pointer into some system copy which
541 ;; will be freed when the system itself is shut down. But judging
542 ;; from the way that the result is used in the cdemodsa.c example
543 ;; program, it looks like the latter: we should make our own copy of
544 ;; the value, but not try to free it.
546 ;; WORKAROUND: OCI seems to return ub2 values for the
547 ;; +oci-attr-data-size+ attribute even though its documentation claims
548 ;; that it returns a ub4, and even though the associated "sizep" value
549 ;; is 4, not 2. In order to make the code here work reliably, without
550 ;; having to patch it later if OCI is ever fixed to match its
551 ;; documentation, we pre-zero COLSIZE before making the call into OCI.
553 ;; To exercise the weird OCI behavior (thereby blowing up the code
554 ;; below, beware!) try setting this value into COLSIZE, calling OCI,
555 ;; then looking at the value in COLSIZE. (setf colsize #x12345678)
559 (defun make-query-cursor-cds (database stmthp types)
560 (declare (optimize (safety 3) #+nil (speed 3))
561 (type oracle-database database)
562 (type pointer-pointer-void stmthp))
565 (unless (eq types :auto)
566 (error "unsupported TYPES value"))
567 (uffi:with-foreign-objects ((dtype :unsigned-short)
571 (colname (* :unsigned-char))
572 (colnamelen :unsigned-long)
573 (colsize :unsigned-long)
574 (colsizesize :unsigned-long)
578 (do ((icolumn 0 (1+ icolumn))
579 (cds-as-reversed-list nil))
580 ((not (eql (oci-param-get (uffi:deref-pointer stmthp void-pointer)
582 (uffi:deref-pointer errhp void-pointer)
584 (1+ icolumn) :database database)
586 (coerce (reverse cds-as-reversed-list) 'simple-vector))
587 ;; Decode type of ICOLUMNth column into a type we're prepared to
589 (oci-attr-get (uffi:deref-pointer parmdp void-pointer)
592 (uffi:make-null-pointer :int) +oci-attr-data-type+
593 (uffi:deref-pointer errhp void-pointer))
596 (setf buffer (acquire-foreign-resource :char (* 32 +n-buf-rows+)))
597 (setf sizeof 32 dtype #.SQLT-STR))
599 ;;(oci-attr-get parmdp +oci-dtype-param+
600 ;;(addr precision) nil +oci-attr-precision+
601 ;;(uffi:deref-pointer errhp))
602 (oci-attr-get (uffi:deref-pointer parmdp void-pointer)
605 (uffi:make-null-pointer :int) +oci-attr-scale+
606 (uffi:deref-pointer errhp void-pointer))
609 (setf buffer (acquire-foreign-resource :init +n-buf-rows+)
610 sizeof 4 ;; sizeof(int)
613 (setf buffer (acquire-foreign-resource :double +n-buf-rows+)
614 sizeof 8 ;; sizeof(double)
616 (t ; Default to SQL-STR
617 (setf (uffi:deref-pointer colsize :unsigned-long) 0
619 (oci-attr-get (uffi:deref-pointer parmdp void-pointer)
622 (uffi:make-null-pointer :int) ;; (uffi:pointer-address colsizesize)
624 (uffi:deref-pointer errhp void-pointer))
625 (let ((colsize-including-null (1+ (uffi:deref-pointer colsize :unsigned-long))))
626 (setf buffer (acquire-foreign-resource
627 :char (* +n-buf-rows+ colsize-including-null)))
628 (setf sizeof colsize-including-null))))
629 (let ((retcodes (acquire-foreign-resource :short +n-buf-rows+))
630 (indicators (acquire-foreign-resource :short +n-buf-rows+)))
631 (push (make-cd :name "col" ;(subseq colname 0 colnamelen)
636 :indicators indicators)
637 cds-as-reversed-list)
638 (oci-define-by-pos (uffi:deref-pointer stmthp void-pointer)
640 (uffi:deref-pointer errhp void-pointer)
641 (1+ icolumn) ; OCI 1-based indexing again
642 (foreign-resource-buffer buffer)
645 (foreign-resource-buffer indicators)
646 (uffi:make-null-pointer :unsigned-short)
647 (foreign-resource-buffer retcodes)
650 ;; Release the resources associated with a QUERY-CURSOR.
652 (defun close-query (qc)
653 (oci-handle-free (uffi:deref-pointer (qc-stmthp qc) void-pointer) +oci-htype-stmt+)
654 (let ((cds (qc-cds qc)))
655 (dotimes (i (length cds))
656 (release-cd-resources (aref cds i))))
660 ;; Release the resources associated with a column description.
662 (defun release-cd-resources (cd)
663 (free-foreign-resource (cd-buffer cd))
664 (free-foreign-resource (cd-retcodes cd))
665 (free-foreign-resource (cd-indicators cd))
669 (defmethod database-name-from-spec (connection-spec (database-type (eql :oracle)))
670 (check-connection-spec connection-spec database-type (dsn user password))
671 (destructuring-bind (dsn user password) connection-spec
672 (declare (ignore password))
673 (concatenate 'string dsn "/" user)))
676 (defmethod database-connect (connection-spec (database-type (eql :oracle)))
677 (check-connection-spec connection-spec database-type (dsn user password))
678 (destructuring-bind (data-source-name user password)
680 (let ((envhp (uffi:allocate-foreign-object (* :void)))
681 (errhp (uffi:allocate-foreign-object (* :void)))
682 (svchp (uffi:allocate-foreign-object (* :void)))
683 (srvhp (uffi:allocate-foreign-object (* :void))))
684 ;; Requests to allocate environments and handles should never
685 ;; fail in normal operation, and they're done too early to
686 ;; handle errors very gracefully (since they're part of the
687 ;; error-handling mechanism themselves) so we just assert they
689 (setf (uffi:deref-pointer envhp void-pointer) +null-void-pointer+)
692 (oci-env-create envhp +oci-default+ nil nil nil nil 0 nil)
693 (oci-handle-alloc envhp
694 (c-& errhp void-pointer) +oci-htype-error+ 0
695 +null-void-pointer-pointer+))
698 (oci-initialize +oci-object+ +null-void-pointer+ +null-void-pointer+
699 +null-void-pointer+ +null-void-pointer-pointer+)
700 (ignore-errors (oci-handle-alloc +null-void-pointer+ envhp
702 +null-void-pointer-pointer+)) ;no testing return
703 (oci-env-init envhp +oci-default+ 0 +null-void-pointer-pointer+)
704 (oci-handle-alloc (uffi:deref-pointer envhp void-pointer) errhp
705 +oci-htype-error+ 0 +null-void-pointer-pointer+)
706 (oci-handle-alloc (uffi:deref-pointer envhp void-pointer) srvhp
707 +oci-htype-server+ 0 +null-void-pointer-pointer+)
708 (oci-server-attach (uffi:deref-pointer srvhp void-pointer)
709 (uffi:deref-pointer errhp void-pointer)
710 (uffi:make-null-pointer :unsigned-char)
712 (oci-handle-alloc (uffi:deref-pointer envhp void-pointer) svchp
713 +oci-htype-svcctx+ 0 +null-void-pointer-pointer+)
714 (oci-attr-set (uffi:deref-pointer svchp void-pointer)
716 (uffi:deref-pointer srvhp void-pointer) 0 +oci-attr-server+
717 (uffi:deref-pointer errhp void-pointer))
718 ;; oci-handle-alloc((dvoid *)encvhp, (dvoid **)&stmthp, OCI_HTYPE_STMT, 0, 0);
721 (let ((db (make-instance 'oracle-database
722 :name (database-name-from-spec connection-spec
726 :database-type :oracle
728 :dsn data-source-name
730 (oci-logon (uffi:deref-pointer envhp void-pointer)
731 (uffi:deref-pointer errhp void-pointer)
733 (uffi:convert-to-cstring user) (length user)
734 (uffi:convert-to-cstring password) (length password)
735 (uffi:convert-to-cstring data-source-name) (length data-source-name)
737 ;; :date-format-length (1+ (length date-format)))))
738 (setf (slot-value db 'clsql-sys::state) :open)
739 (database-execute-command
740 (format nil "alter session set NLS_DATE_FORMAT='~A'" (date-format db)) db)
744 ;; Close a database connection.
746 (defmethod database-disconnect ((database oracle-database))
747 (osucc (oci-logoff (uffi:deref-pointer (svchp database) void-pointer)
748 (uffi:deref-pointer (errhp database) void-pointer)))
749 (osucc (oci-handle-free (uffi:deref-pointer (envhp database) void-pointer)
751 ;; Note: It's neither required nor allowed to explicitly deallocate the
752 ;; ERRHP handle here, since it's owned by the ENVHP deallocated above,
753 ;; and was therefore automatically deallocated at the same time.
756 ;;; Do the database operation described in SQL-STMT-STRING on database
757 ;;; DB and, if the command is a SELECT, return a representation of the
758 ;;; resulting table. The representation of the table is controlled by the
760 ;;; * If QUERY is NIL, the table is returned as a list of rows, with
761 ;;; each row represented by a list.
762 ;;; * If QUERY is non-NIL, the result is returned as a QUERY-CURSOR
763 ;;; suitable for FETCH-ROW and CLOSE-QUERY
764 ;;; The TYPES argument controls the type conversion method used
765 ;;; to construct the table. The Allegro version supports several possible
766 ;;; values for this argument, but we only support :AUTO.
768 (defmethod database-query (query-expression (database oracle-database) result-types field-names)
769 (let ((cursor (sql-stmt-exec query-expression database :types :auto)))
770 ;; (declare (type (or query-cursor null) cursor))
771 (if (null cursor) ; No table was returned.
773 (do ((reversed-result nil))
775 (let* ((eof-value :eof)
776 (row (fetch-row cursor nil eof-value)))
777 (when (eq row eof-value)
779 (return (nreverse reversed-result)))
780 (push row reversed-result))))))
783 (defmethod database-create-sequence
784 (sequence-name (database oracle-database))
786 (concatenate 'string "CREATE SEQUENCE "
787 (sql-escape sequence-name))
790 (defmethod database-drop-sequence
791 (sequence-name (database oracle-database))
793 (concatenate 'string "DROP SEQUENCE "
794 (sql-escape sequence-name))
797 (defmethod database-sequence-next (sequence-name (database oracle-database))
800 (concatenate 'string "SELECT "
801 (sql-escape sequence-name)
803 ) :database database)))
806 (defmethod database-execute-command (sql-expression (database oracle-database))
807 (database-query sql-expression database nil nil)
809 (database-query "commit" database nil nil)
813 ;;; a column descriptor: metadata about the data in a table
814 (defstruct (cd (:constructor make-cd)
815 (:print-function print-cd))
816 ;; name of this column
817 (name (error "missing NAME") :type simple-string :read-only t)
818 ;; the size in bytes of a single element
819 (sizeof (error "missing SIZE") :type fixnum :read-only t)
820 ;; an array of +N-BUF-ROWS+ elements in C representation
821 (buffer (error "Missing BUFFER")
822 :type foreign-resource
824 ;; an array of +N-BUF-ROWS+ OCI return codes in C representation.
825 ;; (There must be one return code for every element of every
826 ;; row in order to be able to represent nullness.)
827 (retcodes (error "Missing RETCODES")
828 :type foreign-resource
830 (indicators (error "Missing INDICATORS")
831 :type foreign-resource
833 ;; the OCI code for the data type of a single element
834 (oci-data-type (error "missing OCI-DATA-TYPE")
839 (defun print-cd (cd stream depth)
840 (declare (ignore depth))
841 (print-unreadable-object (cd stream :type t)
843 ":NAME ~S :OCI-DATA-TYPE ~S :OCI-DATA-SIZE ~S"
845 (cd-oci-data-type cd)
848 (defun print-query-cursor (qc stream depth)
849 (declare (ignore depth))
850 (print-unreadable-object (qc stream :type t :identity t)
851 (prin1 (qc-db qc) stream)))
854 (defmethod database-query-result-set ((query-expression string)
855 (database oracle-database)
856 &key full-set result-types)
859 (defmethod database-dump-result-set (result-set (database oracle-database))
862 (defmethod database-store-next-row (result-set (database oracle-database) list)
865 (defmethod clsql-sys::database-start-transaction ((database oracle-database))
868 ;;(with-slots (svchp errhp) database
869 ;; (osucc (oci-trans-start (uffi:deref-pointer svchp)
870 ;; (uffi:deref-pointer errhp)
872 ;; +oci-trans-new+)))
876 (defmethod clsql-sys::database-commit-transaction ((database oracle-database))
878 (with-slots (svchp errhp) database
879 (osucc (oci-trans-commit (uffi:deref-pointer svchp void-pointer)
880 (uffi:deref-pointer errhp void-pointer)
884 (defmethod clsql-sys::database-abort-transaction ((database oracle-database))
886 (osucc (oci-trans-rollback (uffi:deref-pointer (svchp database) void-pointer)
887 (uffi:deref-pointer (errhp database) void-pointer)
891 (defparameter *constraint-types*
892 '(("NOT-NULL" . "NOT NULL")))
894 (defmethod database-output-sql ((str string) (database oracle-database))
895 (if (and (null (position #\' str))
896 (null (position #\\ str)))
897 (format nil "'~A'" str)
898 (let* ((l (length str))
899 (buf (make-string (+ l 3))))
900 (setf (aref buf 0) #\')
903 ((= i l) (setf (aref buf j) #\'))
904 (if (= j (- (length buf) 1))
905 (setf buf (adjust-array buf (+ (length buf) 1))))
906 (cond ((eql (aref str i) #\')
907 (setf (aref buf j) #\')
909 (setf (aref buf j) (aref str i)))