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 (defvar *oracle-server-version* nil
19 "Version string of Oracle server.")
21 (defmethod database-initialize-database-type
22 ((database-type (eql :oracle)))
25 ;;;; KLUDGE: The original prototype of this code was implemented using
26 ;;;; lots of special variables holding MAKE-ALIEN values. When I was
27 ;;;; first converting it to use WITH-ALIEN variables, I was confused
28 ;;;; about the behavior of MAKE-ALIEN and WITH-ALIEN; I thought that
29 ;;;; (MAKE-ALIEN TYPEFOO) returned the same type of object as is bound
30 ;;;; to the name BAR by (WITH-ALIEN ((BAR TYPEFOO)) ..). In fact the
31 ;;;; value returned by MAKE-ALIEN has an extra level of indirection
32 ;;;; relative to the value bound by WITH-ALIEN, i.e. (DEREF
33 ;;;; (MAKE-ALIEN TYPEFOO)) has the same type as the value bound to the
34 ;;;; name BAR by (WITH-ALIEN ((BAR TYPEFOO)) ..). Laboring under my
35 ;;;; misunderstanding, I was unable to use ordinary scalars bound by
36 ;;;; WITH-ALIEN, and I ended up giving up and deciding to work around
37 ;;;; this apparent bug in CMUCL by using 1-element arrays instead.
38 ;;;; This "workaround" for my misunderstanding is obviously unnecessary
39 ;;;; and confusing, but still remains in the code. -- WHN 20000106
42 ;;;; arbitrary parameters, tunable for performance or other reasons
44 (uffi:def-foreign-type void-pointer (* :void))
46 (eval-when (:compile-toplevel :load-toplevel :execute)
47 (defconstant +errbuf-len+ 512
48 "the number of characters that we allocate for an error message buffer")
49 (defconstant +n-buf-rows+ 200
50 "the number of table rows that we buffer at once when reading a table.
51 CMUCL has a compiled-in limit on how much C data can be allocated
52 (through malloc() and friends) at any given time, typically 8 Mb.
53 Setting this constant to a moderate value should make it less
54 likely that we'll have to worry about the CMUCL limit."))
57 ;;; utilities for mucking around with C-level stuff
59 ;; Return the address of ALIEN-OBJECT (like the C operator "&").
61 ;; The INDICES argument is useful to give the ALIEN-OBJECT the
62 ;; expected number of zero indices, especially when we have a bunch of
63 ;; 1-element arrays running around due to the workaround for the CMUCL
64 ;; 18b WITH-ALIEN scalar bug.
66 (defmacro c-& (alien-object type)
67 `(uffi:pointer-address (uffi:deref-pointer ,alien-object ,type)))
69 ;; constants - from OCI?
71 (defconstant +var-not-in-list+ 1007)
72 (defconstant +no-data-found+ 1403)
73 (defconstant +null-value-returned+ 1405)
74 (defconstant +field-truncated+ 1406)
76 (eval-when (:compile-toplevel :load-toplevel :execute)
77 (defconstant SQLT-INT 3)
78 (defconstant SQLT-STR 5)
79 (defconstant SQLT-FLT 4)
80 (defconstant SQLT-DATE 12))
82 ;;; Note that despite the suggestive class name (and the way that the
83 ;;; *DEFAULT-DATABASE* variable holds an object of this class), a DB
84 ;;; object is not actually a database but is instead a connection to a
85 ;;; database. Thus, there's no obstacle to having any number of DB
86 ;;; objects referring to the same database.
88 (uffi:def-type pointer-pointer-void '(* (* :void)))
90 (defclass oracle-database (database) ; was struct db
94 :type pointer-pointer-void
96 "OCI environment handle")
100 :type pointer-pointer-void
106 :type pointer-pointer-void
108 "OCI service context handle")
113 "optional data source name (used only for debugging/printing)")
119 "the \"user\" value given when data source connection was made")
121 :initarg :date-format
123 :initform "YYYY-MM-DD HH24:MI:SS\"+00\"")
127 "Each database connection can be configured with its own date
128 output format. In order to extract date strings from output buffers
129 holding multiple date strings in fixed-width fields, we need to know
130 the length of that format.")))
133 ;;; Handle the messy case of return code=+oci-error+, querying the
134 ;;; system for subcodes and reporting them as appropriate. ERRHP and
135 ;;; NULLS-OK are as in the OERR function.
137 (defun handle-oci-error (&key database nulls-ok)
141 (uffi:with-foreign-objects ((errbuf (:array :unsigned-char #.+errbuf-len+))
143 (setf (uffi:deref-array errbuf '(:array :unsigned-char) 0) (code-char 0)) ; i.e. init to empty string
144 (setf (uffi:deref-pointer errcode :long) 0)
145 (oci-error-get (uffi:deref-pointer errhp void-pointer) 1
146 (uffi:make-null-pointer :unsigned-char)
147 errcode errbuf +errbuf-len+ +oci-htype-error+)
148 (let ((subcode (uffi:deref-pointer errcode :long)))
149 (unless (and nulls-ok (= subcode +null-value-returned+))
150 (error 'clsql-sql-error
154 :error (uffi:convert-from-foreign-string errbuf)))))))
156 (error 'clsql-sql-error
158 :message "can't handle NULLS-OK without ERRHP"))
160 (error 'clsql-sql-error
162 :message "OCI Error (and no ERRHP available to find subcode)"))))
164 ;;; Require an OCI success code.
166 ;;; (The ordinary OCI error reporting mechanisms uses a fair amount of
167 ;;; machinery (environments and other handles). In order to get to
168 ;;; where we can use these mechanisms, we have to be able to allocate
169 ;;; the machinery. The functions for allocating the machinery can
170 ;;; return errors (e.g. out of memory) but shouldn't. Wrapping this function
171 ;;; around function calls to such have-to-succeed functions enforces
175 (declare (type fixnum code))
176 (unless (= code +oci-success+)
178 :format-control "unexpected OCI failure, code=~S"
179 :format-arguments (list code))))
182 ;;; Enabling this can be handy for low-level debugging.
185 (trace oci-initialize #+oci-8-1-5 oci-env-create oci-handle-alloc oci-logon
186 oci-error-get oci-stmt-prepare oci-stmt-execute
187 oci-param-get oci-logon oci-attr-get oci-define-by-pos oci-stmt-fetch)
188 (setf debug::*debug-print-length* nil))
191 ;;;; the OCI library, part V: converting from OCI representations to Lisp
194 ;; Return the INDEXth string of the OCI array, represented as Lisp
195 ;; SIMPLE-STRING. SIZE is the size of the fixed-width fields used by
196 ;; Oracle to store strings within the array.
198 ;; In the wild world of databases, trailing spaces aren't generally
199 ;; significant, since e.g. "LARRY " and "LARRY " are the same string
200 ;; stored in different fixed-width fields. OCI drops trailing spaces
201 ;; for us in some cases but apparently not for fields of fixed
202 ;; character width, e.g.
204 ;; (dbi:sql "create table employees (name char(15), job char(15), city
205 ;; char(15), rate float)" :db orcl :types :auto)
206 ;; In order to map the "same string" property above onto Lisp equality,
207 ;; we drop trailing spaces in all cases:
209 (uffi:def-type string-pointer (* :unsigned-char))
211 (defun deref-oci-string (arrayptr string-index size)
212 (declare (type string-pointer arrayptr))
213 (declare (type (mod #.+n-buf-rows+) string-index))
214 (declare (type (and unsigned-byte fixnum) size))
215 (let* ((raw (uffi:convert-from-foreign-string
216 (+ (uffi:pointer-address arrayptr) (* string-index size))))
217 (trimmed (string-trim " " raw)))
218 (if (equal trimmed "NULL") nil trimmed)))
220 ;; the OCI library, part Z: no-longer used logic to convert from
221 ;; Oracle's binary date representation to Common Lisp's native date
225 (defvar +oci-date-bytes+ 7)
227 ;;; Return the INDEXth date in the OCI array, represented as
228 ;;; a Common Lisp "universal time" (i.e. seconds since 1900).
231 (defun deref-oci-date (arrayptr index)
232 (oci-date->universal-time (uffi:pointer-address (uffi:deref-array arrayptr '(:array :unsigned-char)
233 (* index +oci-date-bytes+)))))
235 (defun oci-date->universal-time (oci-date)
236 (declare (type (alien (* :unsigned-char)) oci-date))
237 (flet (;; a character from OCI-DATE, interpreted as an unsigned byte
239 (declare (type (mod #.+oci-date-bytes+) i))
240 (mod (uffi:deref-array oci-date string-pointer i) 256)))
241 (let* ((century (* (- (ub 0) 100) 100))
242 (year (+ century (- (ub 1) 100)))
247 (second (1- (ub 6))))
248 (encode-universal-time second minute hour day month year))))
250 ;; Return (VALUES ALL-TABLES COLUMN-NAMES), where ALL-TABLES is a
251 ;; table containing one row for each table available in DB, and
252 ;; COLUMN-NAMES is a list of header names for the columns in
255 ;; The Allegro version also accepted a HSTMT argument.
257 ;(defmethod database-list-tables ((db oracle-database))
258 ; (sql:query "select '',OWNER,TABLE_NAME,TABLE_TYPE,'' from all_catalog"))
261 (defmethod database-list-tables ((db oracle-database) &key owner)
262 (values (database-query "select TABLE_NAME from all_catalog
263 where owner not in ('PUBLIC','SYSTEM','SYS','WMSYS','EXFSYS','CTXSYS','WKSYS','WK_TEST','MDSYS','DMSYS','OLAPSYS','ORDSYS','XDB')"
267 (defmethod database-list-views ((database oracle-database)
268 &key (system-tables nil) owner)
270 (database-query "select table_name from all_catalog" database nil nil)
271 (database-query "select table_name from all_catalog where owner != 'PUBLIC' and owner != 'SYSTEM' and owner != 'SYS'"
274 ;; Return a list of all columns in TABLE.
276 ;; The Allegro version of this also returned a second value.
278 (defmethod list-all-table-columns (table (db oracle-database))
279 (declare (type string table))
281 (setf db clsql:*default-database*))
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 (sql sql-stmt :db db :types :auto)))
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)
306 (let* ((relname (etypecase table
307 (clsql-sys::sql-ident
309 (symbol-name (slot-value table 'clsql-sys::name))))
314 "select user_tab_columns,column_name from user_tab_columns where user_tab_columns.table_name='~A'"
320 ;; Return one row of the table referred to by QC, represented as a
321 ;; list; or if there are no more rows, signal an error if EOF-ERRORP,
322 ;; or return EOF-VALUE otherwise.
324 ;; KLUDGE: This CASE statement is a strong sign that the code would be
325 ;; cleaner if CD were made into an abstract class, we made variant
326 ;; classes for CD-for-column-of-strings, CD-for-column-of-floats,
327 ;; etc., and defined virtual functions to handle operations like
328 ;; get-an-element-from-column. (For a small special purpose module
329 ;; like this, would arguably be overkill, so I'm not going to do it
330 ;; now, but if this code ends up getting more complicated in
331 ;; maintenance, it would become a really good idea.)
333 ;; Arguably this would be a good place to signal END-OF-FILE, but
334 ;; since the ANSI spec specifically says that END-OF-FILE means a
335 ;; STREAM which has no more data, and QC is not a STREAM, we signal
336 ;; DBI-ERROR instead.
338 (uffi:def-type short-pointer '(* :short))
339 (uffi:def-type double-pointer '(* :double))
341 ;;; the result of a database query: a cursor through a table
342 (defstruct (oracle-result-set (:print-function print-query-cursor)
344 (:constructor %make-query-cursor))
345 (db (error "missing DB") ; db conn. this table is associated with
348 (stmthp (error "missing STMTHP") ; the statement handle used to create
349 ;; :type alien ; this table. owned by the QUERY-CURSOR
350 :read-only t) ; object, deallocated on CLOSE-QUERY
351 (cds) ; (error "missing CDS") ; column descriptors
352 ; :type (simple-array cd 1)
355 0 ; buffered rows: number of rows recv'd
356 :type (integer 0 #.+n-buf-rows+)) ; from the database on the last read
358 0 ; number of buffered rows returned, i.e.
359 :type (integer 0 #.+n-buf-rows+)) ; the index, within the buffered rows,
360 ; of the next row which hasn't already
363 0 ; total number of bytes recv'd from OCI
364 :type unsigned-byte) ; in all reads
365 (oci-end-seen-p nil)) ; Have we seen the end of OCI
366 ; data, i.e. OCI returning
367 ; less data than we requested?
368 ; OCI doesn't seem to like us
369 ; to try to read more data
370 ; from it after that..
373 (defun fetch-row (qc &optional (eof-errorp t) eof-value)
374 ;;(declare (optimize (speed 3)))
375 (cond ((zerop (qc-n-from-oci qc))
377 (error 'clsql-error :message
378 (format nil "no more rows available in ~S" qc))
380 ((>= (qc-n-to-dbi qc)
382 (refill-qc-buffers qc)
383 (fetch-row qc nil eof-value))
385 (let ((cds (qc-cds qc))
386 (reversed-result nil)
387 (irow (qc-n-to-dbi qc)))
388 (dotimes (icd (length cds))
389 (let* ((cd (aref cds icd))
390 (b (foreign-resource-buffer (cd-buffer cd)))
392 (let ((arb (foreign-resource-buffer (cd-indicators cd))))
393 (declare (type short-pointer arb))
394 (unless (= (uffi:deref-array arb '(:array :int) irow) -1)
395 (ecase (cd-oci-data-type cd)
396 (#.SQLT-STR (deref-oci-string b irow (cd-sizeof cd)))
397 (#.SQLT-FLT (uffi:deref-array b '(:array :double) irow))
398 (#.SQLT-INT (uffi:deref-array b '(:array :int) irow))
399 (#.SQLT-DATE (deref-oci-string b irow (cd-sizeof cd))))))))
400 (push value reversed-result)))
401 (incf (qc-n-to-dbi qc))
402 (nreverse reversed-result)))))
404 (defun refill-qc-buffers (qc)
407 (setf (qc-n-to-dbi qc) 0)
408 (cond ((qc-oci-end-seen-p qc)
409 (setf (qc-n-from-oci qc) 0))
411 (let ((oci-code (%oci-stmt-fetch (uffi:deref-pointer (qc-stmthp qc) void-pointer)
412 (uffi:deref-pointer errhp void-pointer)
414 +oci-fetch-next+ +oci-default+)))
416 (#.+oci-success+ (values))
417 (#.+oci-no-data+ (setf (qc-oci-end-seen-p qc) t)
419 (#.+oci-error+ (handle-oci-error :database (qc-db qc)
421 (uffi:with-foreign-object (rowcount :long)
422 (oci-attr-get (uffi:deref-pointer (qc-stmthp qc) void-pointer) +oci-htype-stmt+
424 (uffi:make-null-pointer :unsigned-long)
426 (uffi:deref-pointer errhp void-pointer))
427 (setf (qc-n-from-oci qc)
428 (- (uffi:deref-pointer rowcount :long) (qc-total-n-from-oci qc)))
429 (when (< (qc-n-from-oci qc) +n-buf-rows+)
430 (setf (qc-oci-end-seen-p qc) t))
431 (setf (qc-total-n-from-oci qc)
432 (uffi:deref-pointer rowcount :long)))))
435 ;; the guts of the SQL function
437 ;; (like the SQL function, but with the QUERY argument hardwired to T, so
438 ;; that the return value is always a cursor instead of a list)
440 ;; Is this a SELECT statement? SELECT statements are handled
441 ;; specially by OCIStmtExecute(). (Non-SELECT statements absolutely
442 ;; require a nonzero iteration count, while the ordinary choice for a
443 ;; SELECT statement is a zero iteration count.
445 ;; SELECT statements are the only statements which return tables. We
446 ;; don't free STMTHP in this case, but instead give it to the new
447 ;; QUERY-CURSOR, and the new QUERY-CURSOR becomes responsible for
448 ;; freeing the STMTHP when it is no longer needed.
450 (defun sql-stmt-exec (sql-stmt-string db &key types)
451 (with-slots (envhp svchp errhp)
453 (let ((stmthp (uffi:allocate-foreign-object void-pointer)))
454 (uffi:with-foreign-object (stmttype :unsigned-short)
456 (oci-handle-alloc (uffi:deref-pointer envhp void-pointer)
458 +oci-htype-stmt+ 0 +null-void-pointer-pointer+)
459 (oci-stmt-prepare (uffi:deref-pointer stmthp void-pointer)
460 (uffi:deref-pointer errhp void-pointer)
461 (uffi:convert-to-cstring sql-stmt-string)
462 (length sql-stmt-string)
463 +oci-ntv-syntax+ +oci-default+ :database db)
464 (oci-attr-get (uffi:deref-pointer stmthp void-pointer)
467 (uffi:make-null-pointer :unsigned-int)
469 (uffi:deref-pointer errhp void-pointer)
471 (let* ((select-p (= (uffi:deref-pointer stmttype :unsigned-short) 1))
472 (iters (if select-p 0 1)))
474 (oci-stmt-execute (uffi:deref-pointer svchp void-pointer)
475 (uffi:deref-pointer stmthp void-pointer)
476 (uffi:deref-pointer errhp void-pointer)
477 iters 0 +null-void-pointer+ +null-void-pointer+ +oci-default+
480 (make-query-cursor db stmthp types))
482 (oci-handle-free (uffi:deref-pointer stmthp void-pointer) +oci-htype-stmt+)
486 ;; Return a QUERY-CURSOR representing the table returned from the OCI
487 ;; operation done through STMTHP. TYPES is the argument of the same
488 ;; name from the external SQL function, controlling type conversion
489 ;; of the returned arguments.
491 (defun make-query-cursor (db stmthp types)
492 (let ((qc (%make-query-cursor :db db
494 :cds (make-query-cursor-cds db stmthp types))))
495 (refill-qc-buffers qc)
499 ;; the hairy part of MAKE-QUERY-CURSOR: Ask OCI for information
500 ;; about table columns, translate the information into a Lisp
501 ;; vector of column descriptors, and return it.
503 ;; Allegro defines several flavors of type conversion, but this
504 ;; implementation only supports the :AUTO flavor.
506 ;; A note of explanation: OCI's internal number format uses 21
507 ;; bytes (42 decimal digits). 2 separate (?) one-byte fields,
508 ;; scale and precision, are used to deduce the nature of these
509 ;; 21 bytes. See pp. 3-10, 3-26, and 6-13 of OCI documentation
512 ;; When calling OCI C code to handle the conversion, we have
513 ;; only two numeric types available to pass the return value:
514 ;; double-float and signed-long. It would be possible to
515 ;; bypass the OCI conversion functions and write Lisp code
516 ;; which reads the 21-byte field directly and decodes
517 ;; it. However this is left as an exercise for the reader. :-)
519 ;; The following table describes the mapping, based on the implicit
520 ;; assumption that C's "signed long" type is a 32-bit integer.
522 ;; Internal Values SQL Type C Return Type
523 ;; =============== ======== =============
524 ;; Precision > 0 SCALE = -127 FLOAT --> double-float
525 ;; Precision > 0 && <=9 SCALE = 0 INTEGER --> signed-long
526 ;; Precision = 0 || > 9 SCALE = 0 BIG INTEGER --> double-float
527 ;; Precision > 0 SCALE > 0 DECIMAL --> double-float
529 ;; (OCI uses 1-based indexing here.)
531 ;; KLUDGE: This should work for all other data types except those
532 ;; which don't actually fit in their fixed-width field (BLOBs and the
533 ;; like). As Winton says, we (Cadabra) don't need to worry much about
534 ;; those, since we can't reason with them, so we don't use them. But
535 ;; for a more general application it'd be good to have a more
536 ;; selective and rigorously correct test here for whether we can
537 ;; actually handle the given DEREF-DTYPE value. -- WHN 20000106
539 ;; Note: The OCI documentation doesn't seem to say whether the COLNAME
540 ;; value returned here is a newly-allocated copy which we're
541 ;; responsible for freeing, or a pointer into some system copy which
542 ;; will be freed when the system itself is shut down. But judging
543 ;; from the way that the result is used in the cdemodsa.c example
544 ;; program, it looks like the latter: we should make our own copy of
545 ;; the value, but not try to free it.
547 ;; WORKAROUND: OCI seems to return ub2 values for the
548 ;; +oci-attr-data-size+ attribute even though its documentation claims
549 ;; that it returns a ub4, and even though the associated "sizep" value
550 ;; is 4, not 2. In order to make the code here work reliably, without
551 ;; having to patch it later if OCI is ever fixed to match its
552 ;; documentation, we pre-zero COLSIZE before making the call into OCI.
554 ;; To exercise the weird OCI behavior (thereby blowing up the code
555 ;; below, beware!) try setting this value into COLSIZE, calling OCI,
556 ;; then looking at the value in COLSIZE. (setf colsize #x12345678)
560 (defun make-query-cursor-cds (database stmthp types)
561 (declare (optimize (safety 3) #+nil (speed 3))
562 (type oracle-database database)
563 (type pointer-pointer-void stmthp))
566 (unless (eq types :auto)
567 (error "unsupported TYPES value"))
568 (uffi:with-foreign-objects ((dtype-foreign :unsigned-short)
572 (colname (* :unsigned-char))
573 (colnamelen :unsigned-long)
574 (colsize :unsigned-long)
575 (colsizesize :unsigned-long)
579 (do ((icolumn 0 (1+ icolumn))
580 (cds-as-reversed-list nil))
581 ((not (eql (oci-param-get (uffi:deref-pointer stmthp void-pointer)
583 (uffi:deref-pointer errhp void-pointer)
585 (1+ icolumn) :database database)
587 (coerce (reverse cds-as-reversed-list) 'simple-vector))
588 ;; Decode type of ICOLUMNth column into a type we're prepared to
590 (oci-attr-get (uffi:deref-pointer parmdp void-pointer)
593 (uffi:make-null-pointer :int) +oci-attr-data-type+
594 (uffi:deref-pointer errhp void-pointer))
595 (let ((dtype (uffi:deref-pointer dtype-foreign :unsigned-short)))
598 (setf buffer (acquire-foreign-resource :char (* 32 +n-buf-rows+)))
599 (setf sizeof 32 dtype #.SQLT-STR))
601 ;;(oci-attr-get parmdp +oci-dtype-param+
602 ;;(addr precision) nil +oci-attr-precision+
603 ;;(uffi:deref-pointer errhp))
604 (oci-attr-get (uffi:deref-pointer parmdp void-pointer)
607 (uffi:make-null-pointer :int) +oci-attr-scale+
608 (uffi:deref-pointer errhp void-pointer))
611 (setf buffer (acquire-foreign-resource :init +n-buf-rows+)
612 sizeof 4 ;; sizeof(int)
615 (setf buffer (acquire-foreign-resource :double +n-buf-rows+)
616 sizeof 8 ;; sizeof(double)
618 (t ; Default to SQL-STR
619 (setf (uffi:deref-pointer colsize :unsigned-long) 0
621 (oci-attr-get (uffi:deref-pointer parmdp void-pointer)
624 (uffi:make-null-pointer :int) ;; (uffi:pointer-address colsizesize)
626 (uffi:deref-pointer errhp void-pointer))
627 (let ((colsize-including-null (1+ (uffi:deref-pointer colsize :unsigned-long))))
628 (setf buffer (acquire-foreign-resource
629 :char (* +n-buf-rows+ colsize-including-null)))
630 (setf sizeof colsize-including-null))))
631 (let ((retcodes (acquire-foreign-resource :short +n-buf-rows+))
632 (indicators (acquire-foreign-resource :short +n-buf-rows+)))
633 (push (make-cd :name "col" ;(subseq colname 0 colnamelen)
638 :indicators indicators)
639 cds-as-reversed-list)
640 (oci-define-by-pos (uffi:deref-pointer stmthp void-pointer)
642 (uffi:deref-pointer errhp void-pointer)
643 (1+ icolumn) ; OCI 1-based indexing again
644 (foreign-resource-buffer buffer)
647 (foreign-resource-buffer indicators)
648 (uffi:make-null-pointer :unsigned-short)
649 (foreign-resource-buffer retcodes)
650 +oci-default+))))))))
652 ;; Release the resources associated with a QUERY-CURSOR.
654 (defun close-query (qc)
655 (oci-handle-free (uffi:deref-pointer (qc-stmthp qc) void-pointer) +oci-htype-stmt+)
656 (let ((cds (qc-cds qc)))
657 (dotimes (i (length cds))
658 (release-cd-resources (aref cds i))))
662 ;; Release the resources associated with a column description.
664 (defun release-cd-resources (cd)
665 (free-foreign-resource (cd-buffer cd))
666 (free-foreign-resource (cd-retcodes cd))
667 (free-foreign-resource (cd-indicators cd))
671 (defmethod database-name-from-spec (connection-spec (database-type (eql :oracle)))
672 (check-connection-spec connection-spec database-type (dsn user password))
673 (destructuring-bind (dsn user password) connection-spec
674 (declare (ignore password))
675 (concatenate 'string dsn "/" user)))
678 (defmethod database-connect (connection-spec (database-type (eql :oracle)))
679 (check-connection-spec connection-spec database-type (dsn user password))
680 (destructuring-bind (data-source-name user password)
682 (let ((envhp (uffi:allocate-foreign-object (* :void)))
683 (errhp (uffi:allocate-foreign-object (* :void)))
684 (svchp (uffi:allocate-foreign-object (* :void)))
685 (srvhp (uffi:allocate-foreign-object (* :void))))
686 ;; Requests to allocate environments and handles should never
687 ;; fail in normal operation, and they're done too early to
688 ;; handle errors very gracefully (since they're part of the
689 ;; error-handling mechanism themselves) so we just assert they
691 (setf (uffi:deref-pointer envhp void-pointer) +null-void-pointer+)
694 (oci-env-create envhp +oci-default+ nil nil nil nil 0 nil)
695 (oci-handle-alloc envhp
696 (c-& errhp void-pointer) +oci-htype-error+ 0
697 +null-void-pointer-pointer+))
700 (oci-initialize +oci-object+ +null-void-pointer+ +null-void-pointer+
701 +null-void-pointer+ +null-void-pointer-pointer+)
702 (ignore-errors (oci-handle-alloc +null-void-pointer+ envhp
704 +null-void-pointer-pointer+)) ;no testing return
705 (oci-env-init envhp +oci-default+ 0 +null-void-pointer-pointer+)
706 (oci-handle-alloc (uffi:deref-pointer envhp void-pointer) errhp
707 +oci-htype-error+ 0 +null-void-pointer-pointer+)
708 (oci-handle-alloc (uffi:deref-pointer envhp void-pointer) srvhp
709 +oci-htype-server+ 0 +null-void-pointer-pointer+)
710 (oci-server-attach (uffi:deref-pointer srvhp void-pointer)
711 (uffi:deref-pointer errhp void-pointer)
712 (uffi:make-null-pointer :unsigned-char)
714 (oci-handle-alloc (uffi:deref-pointer envhp void-pointer) svchp
715 +oci-htype-svcctx+ 0 +null-void-pointer-pointer+)
716 (oci-attr-set (uffi:deref-pointer svchp void-pointer)
718 (uffi:deref-pointer srvhp void-pointer) 0 +oci-attr-server+
719 (uffi:deref-pointer errhp void-pointer))
720 ;; oci-handle-alloc((dvoid *)encvhp, (dvoid **)&stmthp, OCI_HTYPE_STMT, 0, 0);
723 (let ((db (make-instance 'oracle-database
724 :name (database-name-from-spec connection-spec
728 :database-type :oracle
730 :dsn data-source-name
732 (oci-logon (uffi:deref-pointer envhp void-pointer)
733 (uffi:deref-pointer errhp void-pointer)
735 (uffi:convert-to-cstring user) (length user)
736 (uffi:convert-to-cstring password) (length password)
737 (uffi:convert-to-cstring data-source-name) (length data-source-name)
739 ;; :date-format-length (1+ (length date-format)))))
740 (uffi:with-foreign-object (buf (:array :unsigned-char 512))
741 (oci-server-version (uffi:deref-pointer svchp void-pointer)
742 (uffi:deref-pointer errhp void-pointer)
746 (setf *oracle-server-version* (uffi:convert-from-foreign-string buf)))
748 (setf (slot-value db 'clsql-sys::state) :open)
749 (database-execute-command
750 (format nil "alter session set NLS_DATE_FORMAT='~A'" (date-format db)) db)
754 ;; Close a database connection.
756 (defmethod database-disconnect ((database oracle-database))
757 (osucc (oci-logoff (uffi:deref-pointer (svchp database) void-pointer)
758 (uffi:deref-pointer (errhp database) void-pointer)))
759 (osucc (oci-handle-free (uffi:deref-pointer (envhp database) void-pointer)
761 ;; Note: It's neither required nor allowed to explicitly deallocate the
762 ;; ERRHP handle here, since it's owned by the ENVHP deallocated above,
763 ;; and was therefore automatically deallocated at the same time.
766 ;;; Do the database operation described in SQL-STMT-STRING on database
767 ;;; DB and, if the command is a SELECT, return a representation of the
768 ;;; resulting table. The representation of the table is controlled by the
770 ;;; * If QUERY is NIL, the table is returned as a list of rows, with
771 ;;; each row represented by a list.
772 ;;; * If QUERY is non-NIL, the result is returned as a QUERY-CURSOR
773 ;;; suitable for FETCH-ROW and CLOSE-QUERY
774 ;;; The TYPES argument controls the type conversion method used
775 ;;; to construct the table. The Allegro version supports several possible
776 ;;; values for this argument, but we only support :AUTO.
778 (defmethod database-query (query-expression (database oracle-database) result-types field-names)
779 (let ((cursor (sql-stmt-exec query-expression database :types :auto)))
780 ;; (declare (type (or query-cursor null) cursor))
781 (if (null cursor) ; No table was returned.
783 (do ((reversed-result nil))
785 (let* ((eof-value :eof)
786 (row (fetch-row cursor nil eof-value)))
787 (when (eq row eof-value)
789 (return (nreverse reversed-result)))
790 (push row reversed-result))))))
793 (defmethod database-create-sequence
794 (sequence-name (database oracle-database))
796 (concatenate 'string "CREATE SEQUENCE "
797 (sql-escape sequence-name))
800 (defmethod database-drop-sequence
801 (sequence-name (database oracle-database))
803 (concatenate 'string "DROP SEQUENCE "
804 (sql-escape sequence-name))
807 (defmethod database-sequence-next (sequence-name (database oracle-database))
810 (concatenate 'string "SELECT "
811 (sql-escape sequence-name)
813 ) :database database)))
816 (defmethod database-execute-command (sql-expression (database oracle-database))
817 (database-query sql-expression database nil nil)
819 (database-query "commit" database nil nil)
823 ;;; a column descriptor: metadata about the data in a table
824 (defstruct (cd (:constructor make-cd)
825 (:print-function print-cd))
826 ;; name of this column
827 (name (error "missing NAME") :type simple-string :read-only t)
828 ;; the size in bytes of a single element
829 (sizeof (error "missing SIZE") :type fixnum :read-only t)
830 ;; an array of +N-BUF-ROWS+ elements in C representation
831 (buffer (error "Missing BUFFER")
832 :type foreign-resource
834 ;; an array of +N-BUF-ROWS+ OCI return codes in C representation.
835 ;; (There must be one return code for every element of every
836 ;; row in order to be able to represent nullness.)
837 (retcodes (error "Missing RETCODES")
838 :type foreign-resource
840 (indicators (error "Missing INDICATORS")
841 :type foreign-resource
843 ;; the OCI code for the data type of a single element
844 (oci-data-type (error "missing OCI-DATA-TYPE")
849 (defun print-cd (cd stream depth)
850 (declare (ignore depth))
851 (print-unreadable-object (cd stream :type t)
853 ":NAME ~S :OCI-DATA-TYPE ~S :OCI-DATA-SIZE ~S"
855 (cd-oci-data-type cd)
858 (defun print-query-cursor (qc stream depth)
859 (declare (ignore depth))
860 (print-unreadable-object (qc stream :type t :identity t)
861 (prin1 (qc-db qc) stream)))
864 (defmethod database-query-result-set ((query-expression string)
865 (database oracle-database)
866 &key full-set result-types)
869 (defmethod database-dump-result-set (result-set (database oracle-database))
872 (defmethod database-store-next-row (result-set (database oracle-database) list)
875 (defmethod clsql-sys::database-start-transaction ((database oracle-database))
878 ;;(with-slots (svchp errhp) database
879 ;; (osucc (oci-trans-start (uffi:deref-pointer svchp)
880 ;; (uffi:deref-pointer errhp)
882 ;; +oci-trans-new+)))
886 (defmethod clsql-sys::database-commit-transaction ((database oracle-database))
888 (with-slots (svchp errhp) database
889 (osucc (oci-trans-commit (uffi:deref-pointer svchp void-pointer)
890 (uffi:deref-pointer errhp void-pointer)
894 (defmethod clsql-sys::database-abort-transaction ((database oracle-database))
896 (osucc (oci-trans-rollback (uffi:deref-pointer (svchp database) void-pointer)
897 (uffi:deref-pointer (errhp database) void-pointer)
901 (defparameter *constraint-types*
902 '(("NOT-NULL" . "NOT NULL")))
904 (defmethod database-output-sql ((str string) (database oracle-database))
905 (if (and (null (position #\' str))
906 (null (position #\\ str)))
907 (format nil "'~A'" str)
908 (let* ((l (length str))
909 (buf (make-string (+ l 3))))
910 (setf (aref buf 0) #\')
913 ((= i l) (setf (aref buf j) #\'))
914 (if (= j (- (length buf) 1))
915 (setf buf (adjust-array buf (+ (length buf) 1))))
916 (cond ((eql (aref str i) #\')
917 (setf (aref buf j) #\')
919 (setf (aref buf j) (aref str i)))
925 (defmethod db-type-has-bigint? ((type (eql :oracle)))