1 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
2 ;;;; *************************************************************************
3 ;;;; FILE IDENTIFICATION
6 ;;;; Purpose: Mid-level (DBI) interface for CLSQL ODBC backend
7 ;;;; Author: Kevin M. Rosenberg
8 ;;;; Create: April 2004
12 ;;;; This file, part of CLSQL, is Copyright (c) 2002 by Kevin M. Rosenberg
14 ;;;; CLSQL users are granted the rights to distribute and use this software
15 ;;;; as governed by the terms of the Lisp Lesser GNU Public License
16 ;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
17 ;;;; *************************************************************************
19 (in-package #:cl-user)
21 (defpackage #:odbc-dbi
33 #:list-all-data-sources
34 #:list-all-database-tables
35 #:list-all-table-columns
46 #:*default-odbc-external-format*
49 (:documentation "This is the mid-level interface ODBC."))
51 (in-package #:odbc-dbi)
53 (defgeneric terminate (src))
54 (defgeneric db-open-query (src query-expression
55 &key arglen col-positions result-types width
57 (defgeneric db-fetch-query-results (src &optional count))
58 (defgeneric %db-execute (src sql-expression &key &allow-other-keys))
59 (defgeneric db-execute-command (src sql-string))
61 (defgeneric %initialize-query (src arglen col-positions
62 &key result-types width))
64 (defgeneric %read-query-data (src ignore-columns))
65 (defgeneric db-map-query (src type function query-exp &key result-types))
66 (defgeneric db-prepare-statement (src sql &key parameter-table
68 (defgeneric get-odbc-info (src info-type))
74 (;; any reason to have more than one henv?
75 (width :initform +max-precision+ :accessor db-width)
76 (hstmt :initform nil :accessor db-hstmt)
77 (henv :initform nil :allocation :class :initarg :henv :accessor henv)
78 (hdbc :initform nil :initarg :hdbc :accessor hdbc)
79 ;; info returned from SQLGetInfo
80 (info :initform (make-hash-table) :reader db-info)
81 (type :initform nil :initarg :db-type :reader db-type)
82 (connected-p :initform nil :accessor db-connected-p)
84 (count :initform 0 :initarg :count :accessor db-count)
86 (total-count :initform 0 :allocation :class :accessor db-total-count)
87 ;; the use of this slot is deprecated; it will be removed when dtf works without it.
88 (query :initform nil :accessor db-query-object)
89 ;; resource of (active and inactive) query objects
90 (queries :initform () :accessor db-queries)))
92 (defclass odbc-query ()
93 ((hstmt :initform nil :initarg :hstmt :accessor hstmt) ; = cursor??
94 (width :initform +max-precision+ :accessor query-width)
95 (computed-result-types :initform nil :initarg :computed-result-types :accessor computed-result-types)
96 (column-count :initform nil :accessor column-count)
97 (column-names :initform (make-array 0 :element-type 'string :adjustable t :fill-pointer t)
98 :accessor column-names)
99 (column-c-types :initform (make-array 0 :element-type 'fixnum :adjustable t :fill-pointer t)
100 :accessor column-c-types)
101 (column-sql-types :initform (make-array 0 :element-type 'fixnum :adjustable t :fill-pointer t)
102 :accessor column-sql-types)
103 (column-data-ptrs :initform (make-array 0 :adjustable t :fill-pointer t)
105 (column-out-len-ptrs :initform (make-array 0 :adjustable t :fill-pointer t)
106 :accessor column-out-len-ptrs)
107 (column-precisions :initform (make-array 0 :element-type 'integer :adjustable t :fill-pointer t)
108 :accessor column-precisions)
109 (column-scales :initform (make-array 0 :element-type 'fixnum :adjustable t :fill-pointer t)
110 :accessor column-scales)
111 (column-nullables-p :initform (make-array 0 :element-type 'fixnum :adjustable t :fill-pointer t)
112 :accessor column-nullables-p)
113 ;;(parameter-count :initform 0 :accessor parameter-count)
114 (parameter-data-ptrs :initform (make-array 0 :adjustable t :fill-pointer t)
115 :accessor parameter-ptrs)
116 ;; a query string or a query expression object
117 (sql-expression :initform nil :initarg :sql-expression :accessor sql-expression)
118 ;; database object the query is to be run against
119 (database :initarg :database :reader query-database)
120 (active-p :initform nil :initarg :active-p :accessor query-active-p))
122 "Stores query information, like SQL query string/expression and database to run
123 the query against." ))
125 ;;; AODBC Compatible interface
127 (defun connect (&key data-source-name user password connection-string completion window-handle (autocommit t))
128 (let ((db (make-instance 'odbc-db)))
129 (unless (henv db) ;; has class allocation!
130 (setf (henv db) (%new-environment-handle)))
131 (setf (hdbc db) (%new-db-connection-handle (henv db)))
132 (if connection-string
133 (%sql-driver-connect (hdbc db)
136 (:no-prompt odbc::$SQL_DRIVER_NOPROMPT)
137 (:complete odbc::$SQL_DRIVER_COMPLETE)
138 (:prompt odbc::$SQL_DRIVER_PROMPT)
139 (:complete-required odbc::$SQL_DRIVER_COMPLETE_REQUIRED))
141 (%sql-connect (hdbc db) data-source-name user password))
142 #+ignore (setf (db-hstmt db) (%new-statement-handle (hdbc db)))
143 (when (/= (get-odbc-info db odbc::$SQL_TXN_CAPABLE) odbc::$SQL_TC_NONE)
145 (enable-autocommit (hdbc db))
146 (disable-autocommit (hdbc db))))
149 (defun disconnect (database)
150 (with-slots (hdbc queries) database
151 (dolist (query queries)
152 (if (query-active-p query)
153 (with-slots (hstmt) query
155 (%free-statement hstmt :drop)
157 (when (db-hstmt database)
158 (%free-statement (db-hstmt database) :drop))
162 (defun sql (expr &key db result-types row-count (column-names t) query
164 (declare (ignore hstmt))
167 (let ((q (db-open-query db expr :result-types result-types :width width)))
169 (values q (column-names q))
172 (multiple-value-bind (data col-names)
173 (db-query db expr :result-types result-types :width width)
176 (if (consp data) (length data) data))
178 (values data col-names))
182 (defun fetch-row (query &optional (eof-errorp t) eof-value)
183 (multiple-value-bind (row query count) (db-fetch-query-results query 1)
188 (error 'clsql:sql-database-data-error
189 :message "ODBC: Ran out of data in fetch-row"))
195 (defun close-query (query)
196 (db-close-query query))
198 (defun list-all-database-tables (&key db hstmt)
199 (declare (ignore hstmt))
200 (let ((query (get-free-query db)))
203 (with-slots (hstmt) query
204 (unless hstmt (setf hstmt (%new-statement-handle (hdbc db))))
206 (%initialize-query query nil nil)
208 (db-fetch-query-results query)
209 (coerce (column-names query) 'list))))
210 (db-close-query query))))
212 (defun list-table-indexes (table &key db unique hstmt)
213 (declare (ignore hstmt))
214 (let ((query (get-free-query db)))
217 (with-slots (hstmt) query
219 (setf hstmt (%new-statement-handle (hdbc db))))
220 (%table-statistics table hstmt :unique unique)
221 (%initialize-query query nil nil)
223 (db-fetch-query-results query)
224 (coerce (column-names query) 'list))))
225 (db-close-query query))))
227 (defun list-all-table-columns (table &key db hstmt)
228 (declare (ignore hstmt))
229 (db-describe-columns db nil nil table nil)) ;; use nil rather than "" for unspecified values
231 (defun list-all-data-sources ()
232 (let ((db (make-instance 'odbc-db)))
233 (unless (henv db) ;; has class allocation!
234 (setf (henv db) (%new-environment-handle)))
235 (%list-data-sources (henv db))))
237 (defun rr-sql (hstmt sql-statement &key db)
238 (declare (ignore hstmt sql-statement db))
239 (warn "rr-sql not implemented."))
241 ;;; Mid-level interface
243 (defun db-commit (database)
244 (%commit (henv database) (hdbc database)))
246 (defun db-rollback (database)
247 (%rollback (henv database) (hdbc database)))
249 (defun db-cancel-query (query)
250 (with-slots (hstmt) query
252 (setf (query-active-p query) nil)))
255 (defmacro with-transaction (&body body)
257 (:henv (henv ,*default-database*) :hdbc (hdbc ,*default-database*))
260 (defmethod initialize-instance :after ((query odbc-query)
261 &key sql henv hdbc &allow-other-keys)
263 (let ((hstmt (%new-statement-handle hdbc)))
264 (%sql-exec-direct sql hstmt henv hdbc)
265 (with-slots (column-count
266 column-names column-c-types column-sql-types column-data-ptrs
267 column-out-len-ptrs column-precisions column-scales
268 column-nullables-p active-p) query
269 (setf (hstmt query) hstmt)
270 (%initialize-query query nil nil)
271 (setf active-p t)))))
273 ;; one for odbc-db is missing
274 (defmethod terminate ((query odbc-query))
275 ;;(format tb::*local-output* "~%*** terminated: ~s" query)
276 (with-slots (hstmt) query
278 ;(%free-statement hstmt :drop)
279 (uffi:free-foreign-object hstmt)) ;; ??
280 (%dispose-column-ptrs query)))
282 (defun %dispose-column-ptrs (query)
283 (with-slots (column-data-ptrs column-out-len-ptrs hstmt) query
284 (loop for data-ptr across column-data-ptrs
285 when data-ptr do (uffi:free-foreign-object data-ptr))
286 (loop for out-len-ptr across column-out-len-ptrs
287 when out-len-ptr do (uffi:free-foreign-object out-len-ptr))))
289 (defmethod db-open-query ((database odbc-db) query-expression
290 &key arglen col-positions result-types width
292 (db-open-query (get-free-query database) query-expression
293 :arglen arglen :col-positions col-positions
294 :result-types result-types
295 :width (if width width (db-width database))))
297 (defmethod db-open-query ((query odbc-query) query-expression
298 &key arglen col-positions result-types width
300 (%db-execute query query-expression)
301 (%initialize-query query arglen col-positions :result-types result-types
304 (defmethod db-fetch-query-results ((database odbc-db) &optional count)
305 (db-fetch-query-results (db-query-object database) count))
307 (defmethod db-fetch-query-results ((query odbc-query) &optional count)
308 (when (query-active-p query)
309 (with-slots (column-count column-data-ptrs column-c-types column-sql-types
310 column-out-len-ptrs column-precisions hstmt computed-result-types)
313 ((create-column-fetcher (result-type data-ptr c-type sql-type out-len-ptr precision column-nr)
315 (cond ((< 0 precision (query-width query))
316 (read-data data-ptr c-type sql-type out-len-ptr result-type))
317 ((zerop (get-cast-long out-len-ptr))
320 (read-data-in-chunks hstmt column-nr data-ptr c-type sql-type
321 out-len-ptr result-type))))))
322 (let ((fetchers (make-array column-count :fill-pointer 0 :element-type 'function)))
323 ;;; Map across the columns, creating a set of fetch functions
324 (loop for result-type across computed-result-types
325 for data-ptr across column-data-ptrs
326 for c-type across column-c-types
327 for sql-type across column-sql-types
328 for out-len-ptr across column-out-len-ptrs
329 for precision across column-precisions
330 for column-nr from 0 ; column count is zero based in lisp
332 (vector-push (create-column-fetcher result-type data-ptr c-type sql-type
333 out-len-ptr precision column-nr)
335 ;; keep fetching rows until we meet the count parameter,
336 ;; or the %sql-fetch says we're done.
338 until (or (and count (= i count))
339 (= (%sql-fetch hstmt) odbc::$SQL_NO_DATA_FOUND))
340 ;;collect the results of the fetch functions to make a row.
341 collect (map 'list #'funcall fetchers) into rows
342 finally (return (values rows query i))
345 (defun db-query (database query-expression &key result-types width)
346 (let ((free-query (get-free-query database)))
347 (setf (sql-expression free-query) query-expression)
350 (%db-execute free-query query-expression)
351 (%initialize-query free-query nil nil :result-types result-types :width width)
352 (if (plusp (column-count free-query)) ;; KMR: Added check for commands that don't return columns
354 (db-fetch-query-results free-query nil)
355 (map 'list #'identity (column-names free-query)))
357 (result-rows-count (hstmt free-query))
359 (db-close-query free-query)
362 (defmethod %db-execute ((database odbc-db) sql-expression &key &allow-other-keys)
363 (%db-execute (get-free-query database) sql-expression))
365 (defmethod %db-execute ((query odbc-query) sql-expression &key &allow-other-keys)
366 (with-slots (henv hdbc) (odbc::query-database query)
367 (with-slots (hstmt) query
368 (unless hstmt (setf hstmt (%new-statement-handle hdbc)))
369 (setf (sql-expression query) sql-expression)
370 (%sql-exec-direct sql-expression hstmt henv hdbc)
373 ;; reuse inactive queries
374 (defun get-free-query (database)
375 "get-free-query finds or makes a nonactive query object, and then sets it to active.
376 This makes the functions db-execute-command and db-query thread safe."
377 (with-slots (queries hdbc) database
378 (or (clsql-sys:without-interrupts
379 (let ((inactive-query (find-if (lambda (query)
380 (not (query-active-p query)))
383 (with-slots (column-count column-names column-c-types
385 column-sql-types column-data-ptrs
386 column-out-len-ptrs column-precisions
387 column-scales column-nullables-p)
389 ;;(print column-data-ptrs tb::*local-output*)
390 ;;(%dispose-column-ptrs inactive-query)
392 width +max-precision+
393 ;; KMR hstmt (%new-statement-handle hdbc)
394 (fill-pointer column-names) 0
395 (fill-pointer column-c-types) 0
396 (fill-pointer column-sql-types) 0
397 (fill-pointer column-data-ptrs) 0
398 (fill-pointer column-out-len-ptrs) 0
399 (fill-pointer column-precisions) 0
400 (fill-pointer column-scales) 0
401 (fill-pointer column-nullables-p) 0))
402 (setf (query-active-p inactive-query) t))
404 (let ((new-query (make-instance 'odbc-query
406 ;;(clone-database database)
408 (push new-query queries)
411 (defmethod db-execute-command ((database odbc-db) sql-string)
412 (db-execute-command (get-free-query database) sql-string))
414 (defmethod db-execute-command ((query odbc-query) sql-string)
415 (with-slots (hstmt database) query
416 (with-slots (henv hdbc) database
417 (unless hstmt (setf hstmt (%new-statement-handle hdbc)))
419 (%sql-exec-direct sql-string hstmt henv hdbc)
420 (db-close-query query)))))
422 (defmethod %initialize-query ((database odbc-db) arglen col-positions &key result-types width)
423 (%initialize-query (db-query-object database) arglen col-positions
424 :result-types result-types
425 :width (if width width (db-width database))))
427 (defmethod %initialize-query ((query odbc-query) arglen col-positions &key result-types width)
428 (with-slots (hstmt computed-result-types
429 column-count column-names column-c-types column-sql-types
430 column-data-ptrs column-out-len-ptrs column-precisions
431 column-scales column-nullables-p)
433 (setf column-count (if arglen
434 (min arglen (result-columns-count hstmt))
435 (result-columns-count hstmt)))
436 (when width (setf (query-width query) width))
437 ;;(format tb::*local-output* "~%column-count: ~d, col-positions: ~d" column-count col-positions)
438 (labels ((initialize-column (col-nr)
439 (multiple-value-bind (name sql-type precision scale nullable-p)
440 (%describe-column hstmt (1+ col-nr))
441 ;; allocate space to bind result rows to
442 (multiple-value-bind (c-type data-ptr out-len-ptr size long-p)
443 (%allocate-bindings sql-type precision)
444 (if long-p ;; if long-p we fetch in chunks with %sql-get-data but must ensure that out_len_ptr is non zero
445 (setf (uffi:deref-pointer out-len-ptr #.odbc::$ODBC-LONG-TYPE) #.odbc::$SQL_NO_TOTAL)
446 (%bind-column hstmt col-nr c-type data-ptr (1+ size) out-len-ptr))
447 (vector-push-extend name column-names)
448 (vector-push-extend sql-type column-sql-types)
449 (vector-push-extend (sql-to-c-type sql-type) column-c-types)
450 (vector-push-extend precision column-precisions)
451 (vector-push-extend scale column-scales)
452 (vector-push-extend nullable-p column-nullables-p)
453 (vector-push-extend data-ptr column-data-ptrs)
454 (vector-push-extend out-len-ptr column-out-len-ptrs)))))
456 (dolist (col-nr col-positions)
457 (initialize-column col-nr))
458 (dotimes (col-nr column-count)
459 ;; get column information
460 (initialize-column col-nr))))
462 (setf computed-result-types (make-array column-count))
463 (dotimes (i column-count)
464 (setf (aref computed-result-types i)
466 ((consp result-types)
467 (nth i result-types))
468 ((eq result-types :auto)
469 (if (eq (aref column-sql-types i) odbc::$SQL_BIGINT)
471 (case (aref column-c-types i)
472 (#.odbc::$SQL_C_SLONG :int)
473 (#.odbc::$SQL_C_DOUBLE :double)
474 (#.odbc::$SQL_C_FLOAT :float)
475 (#.odbc::$SQL_C_SSHORT :short)
476 (#.odbc::$SQL_C_STINYINT :short)
477 (#.odbc::$SQL_BIGINT :short)
483 (defun db-close-query (query &key drop-p)
484 (with-slots (hstmt column-count column-names column-c-types column-sql-types
485 column-data-ptrs column-out-len-ptrs column-precisions
486 column-scales column-nullables-p) query
487 (let ((count (fill-pointer column-data-ptrs)))
488 (when (not (zerop count))
489 (dotimes (col-nr count)
490 (let ((data-ptr (aref column-data-ptrs col-nr))
491 (out-len-ptr (aref column-out-len-ptrs col-nr)))
492 (declare (ignorable data-ptr out-len-ptr))
493 ;; free-statment :unbind frees these
494 #+ignore (when data-ptr (uffi:free-foreign-object data-ptr))
495 #+ignore (when out-len-ptr (uffi:free-foreign-object out-len-ptr)))))
499 (%free-statement hstmt :drop)
502 (%free-statement hstmt :unbind)
503 (%free-statement hstmt :reset)
504 (%free-statement hstmt :close)))
505 (setf (query-active-p query) nil)))
508 (defmethod %read-query-data ((database odbc-db) ignore-columns)
509 (%read-query-data (db-query-object database) ignore-columns))
511 (defmethod %read-query-data ((query odbc-query) ignore-columns)
512 (with-slots (hstmt column-count column-c-types column-sql-types
513 column-data-ptrs column-out-len-ptrs column-precisions
514 computed-result-types)
516 (unless (= (odbc::SQLFetch hstmt) odbc::$SQL_NO_DATA_FOUND)
518 (loop for col-nr from 0 to (- column-count
519 (if (eq ignore-columns :last) 2 1))
520 for result-type across computed-result-types
522 (let ((precision (aref column-precisions col-nr))
523 (sql-type (aref column-sql-types col-nr)))
524 (cond ((or (< 0 precision (query-width query))
525 (and (zerop precision) (not (find sql-type '($SQL_C_CHAR)))))
526 (read-data (aref column-data-ptrs col-nr)
527 (aref column-c-types col-nr)
529 (aref column-out-len-ptrs col-nr)
531 ((zerop (get-cast-long (aref column-out-len-ptrs col-nr)))
534 (read-data-in-chunks hstmt col-nr
535 (aref column-data-ptrs col-nr)
536 (aref column-c-types col-nr)
537 (aref column-sql-types col-nr)
538 (aref column-out-len-ptrs col-nr)
542 (defmethod db-map-query ((database odbc-db) type function query-exp &key result-types)
543 (db-map-query (get-free-query database) type function query-exp :result-types result-types))
545 (defmethod db-map-query ((query odbc-query) type function query-exp &key result-types)
546 (declare (ignore type)) ; preliminary. Do a type coersion here
547 (%db-execute query (sql-expression query-exp))
550 (%initialize-query query nil nil :result-types result-types)
552 (loop for data = (%read-query-data query nil)
554 do (apply function data)))
555 ;; dispose of memory and set query inactive or get rid of it
556 (db-close-query query)))
558 (defun db-map-bind-query (query type function
560 (declare (ignore type)) ; preliminary. Do a type coersion here
563 (apply #'%db-bind-execute query parameters)
566 while (setf data (%read-query-data query nil))
567 do (apply function data)))
568 ;; dispose of memory and set query inactive or get rid of it
569 (%db-reset-query query)))
571 ;; does not always return exactly a lisp type...
572 (defun sql-to-lisp-type (sql-type)
574 ((#.odbc::$SQL_CHAR #.odbc::$SQL_VARCHAR #.odbc::$SQL_LONGVARCHAR) :string)
575 ((#.odbc::$SQL_NUMERIC #.odbc::$SQL_DECIMAL #.odbc::$SQL_BIGINT) :string) ; ??
576 (#.odbc::$SQL_INTEGER #.odbc::$ODBC-LONG-TYPE)
577 (#.odbc::$SQL_SMALLINT :short)
578 ((#.odbc::$SQL_FLOAT #.odbc::$SQL_DOUBLE) #.odbc::$ODBC-LONG-TYPE)
579 (#.odbc::$SQL_REAL #.odbc::$ODBC-LONG-TYPE)
580 ((#.odbc::$SQL_DATE #.odbc::$SQL_TYPE_DATE) 'sql-c-date)
581 ((#.odbc::$SQL_TIME #.odbc::$SQL_TYPE_TIME) 'sql-c-time)
582 ((#.odbc::$SQL_TIMESTAMP #.odbc::$SQL_TYPE_TIMESTAMP) 'sql-c-timestamp)
583 ;;((#.odbc::$SQL_BINARY #.odbc::$SQL_VARBINARY #.odbc::$SQL_LONGVARBINARY) odbc::$SQL_C_BINARY) ; ??
584 (#.odbc::$SQL_TINYINT :short)
585 ;;(#.odbc::$SQL_BIT odbc::$SQL_C_BIT) ; ??
586 ((#.odbc::$SQL_VARBINARY #.odbc::$SQL_LONGVARBINARY) :binary)
591 (defmethod db-prepare-statement ((database odbc-db) sql
592 &key parameter-table parameter-columns)
593 (with-slots (hdbc) database
594 (let ((query (get-free-query database)))
595 (with-slots (hstmt) query
596 (unless hstmt (setf hstmt (%new-statement-handle hdbc))))
597 (db-prepare-statement query sql parameter-table parameter-columns))))
599 (defmethod db-prepare-statement ((query odbc-query) (sql string)
600 &key parameter-table parameter-columns)
601 ;; this is a workaround to get hold of the column types when the driver does not
602 ;; support SQLDescribeParam. To do: put code in here for drivers that do
604 (unless (string-equal sql "insert" :end1 6)
605 (error 'clsql:sql-database-error
607 "Only insert expressions are supported in literal ODBC: '~a'." sql)))
608 (%db-execute query (format nil "select ~{~a~^,~} from ~a where 0 = 1"
609 (or parameter-columns '("*")) parameter-table))
610 (%initialize-query query nil nil)
611 (with-slots (hstmt) query
612 (%free-statement hstmt :unbind)
613 (%free-statement hstmt :reset)
614 (setf (sql-expression query) sql)
615 (%sql-prepare hstmt sql))
619 (defun %db-bind-execute (query &rest parameters)
620 (with-slots (hstmt parameter-data-ptrs) query
621 (loop for parameter in parameters
622 with data-ptr and size and parameter-string
624 (setf parameter-string
625 (if (stringp parameter)
627 (write-to-string parameter))
628 size (length parameter-string)
630 (uffi:allocate-foreign-string (1+ size)))
631 (vector-push-extend data-ptr parameter-data-ptrs)
633 hstmt (1- (fill-pointer parameter-data-ptrs)) odbc::$SQL_PARAM_INPUT
634 odbc::$SQL_C_CHAR ; (aref column-c-types parameter-count)
635 odbc::$SQL_CHAR ; sql-type
636 (query-width query) ;precision ; this should be the actual precision!
638 0 ;; should be calculated for odbc::$SQL_DECIMAL,
639 ;;$SQL_NUMERIC and odbc::$SQL_TIMESTAMP
640 data-ptr ;; = rgbValue
643 ;; change this for output and binary input! (see 3-32)
645 (%put-str data-ptr parameter-string size))
646 (%sql-execute hstmt)))
649 (defun %db-reset-query (query)
650 (with-slots (hstmt parameter-data-ptrs) query
652 (db-fetch-query-results query nil)
653 (%free-statement hstmt :reset) ;; but _not_ :unbind !
654 (%free-statement hstmt :close)
655 (dotimes (param-nr (fill-pointer parameter-data-ptrs))
656 (let ((data-ptr (aref parameter-data-ptrs param-nr)))
657 (when data-ptr (uffi:free-foreign-object data-ptr))))
658 (setf (fill-pointer parameter-data-ptrs) 0))))
660 (defun data-parameter-ptr (hstmt)
661 (uffi:with-foreign-object (param-ptr :pointer-void)
662 (let ((return-code (%sql-param-data hstmt param-ptr)))
663 ;;(format t "~%return-code from %sql-param-data: ~a~%" return-code)
664 (when (= return-code odbc::$SQL_NEED_DATA)
665 ;;(ffc::%pointer-to-address (%get-ptr param-ptr))
666 (uffi:deref-pointer param-ptr :pointer-void)))))
668 ;; database inquiery functions
670 (defun db-describe-columns (database table-qualifier table-owner
671 table-name column-name)
672 (with-slots (hdbc) database
673 (%describe-columns hdbc table-qualifier table-owner table-name column-name)))
675 ;; should translate info-type integers to keywords in order to make this
677 (defmethod get-odbc-info ((database odbc-db) info-type)
678 (with-slots (hdbc info) database
679 (or (gethash info-type info)
680 (setf (gethash info-type info)
681 (%sql-get-info hdbc info-type)))))
683 (defmethod get-odbc-info ((query odbc-query) info-type)
684 (get-odbc-info (odbc::query-database query) info-type))
687 ;; How does this differ from list-data-sources?
688 (defgeneric db-data-sources (db-type))
689 (defmethod db-data-sources ((db-type (eql :odbc)))
690 "Returns a list of (data-source description) - pairs"
691 (let ((henv (%new-environment-handle)))
693 (loop with direction = :first
694 for data-source+description
695 = (multiple-value-list (%sql-data-sources henv :direction direction))
696 while (car data-source+description)
697 collect data-source+description
698 do (setf direction :next))
699 (%sql-free-environment henv))))