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
10 ;;;; This file, part of CLSQL, is Copyright (c) 2002 by Kevin M. Rosenberg
12 ;;;; CLSQL users are granted the rights to distribute and use this software
13 ;;;; as governed by the terms of the Lisp Lesser GNU Public License
14 ;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
15 ;;;; *************************************************************************
17 (in-package #:cl-user)
19 (defpackage #:odbc-dbi
31 #:list-all-data-sources
32 #:list-all-database-tables
33 #:list-all-table-columns
44 #:*default-odbc-external-format*
47 (:documentation "This is the mid-level interface ODBC."))
49 (in-package #:odbc-dbi)
51 (defgeneric terminate (src))
52 (defgeneric db-open-query (src query-expression
53 &key arglen col-positions result-types width
55 (defgeneric db-fetch-query-results (src &optional count))
56 (defgeneric %db-execute (src sql-expression &key &allow-other-keys))
57 (defgeneric db-execute-command (src sql-string))
59 (defgeneric %initialize-query (src arglen col-positions
60 &key result-types width))
62 (defgeneric %read-query-data (src ignore-columns))
63 (defgeneric db-map-query (src type function query-exp &key result-types))
64 (defgeneric db-prepare-statement (src sql &key parameter-table
66 (defgeneric get-odbc-info (src info-type))
72 (;; any reason to have more than one henv?
73 (width :initform +max-precision+ :accessor db-width)
74 (hstmt :initform nil :accessor db-hstmt)
75 (henv :initform nil :allocation :class :initarg :henv :accessor henv)
76 (hdbc :initform nil :initarg :hdbc :accessor hdbc)
77 ;; info returned from SQLGetInfo
78 (info :initform (make-hash-table) :reader db-info)
79 (type :initform nil :initarg :db-type :reader db-type)
80 (connected-p :initform nil :accessor db-connected-p)
82 (count :initform 0 :initarg :count :accessor db-count)
84 (total-count :initform 0 :allocation :class :accessor db-total-count)
85 ;; the use of this slot is deprecated; it will be removed when dtf works without it.
86 (query :initform nil :accessor db-query-object)
87 ;; resource of (active and inactive) query objects
88 (queries :initform () :accessor db-queries)))
90 (defclass odbc-query ()
91 ((hstmt :initform nil :initarg :hstmt :accessor hstmt) ; = cursor??
92 (width :initform +max-precision+ :accessor query-width)
93 (computed-result-types :initform nil :initarg :computed-result-types :accessor computed-result-types)
94 (column-count :initform nil :accessor column-count)
95 (column-names :initform (make-array 0 :element-type 'string :adjustable t :fill-pointer t)
96 :accessor column-names)
97 (column-c-types :initform (make-array 0 :element-type 'fixnum :adjustable t :fill-pointer t)
98 :accessor column-c-types)
99 (column-sql-types :initform (make-array 0 :element-type 'fixnum :adjustable t :fill-pointer t)
100 :accessor column-sql-types)
101 (column-data-ptrs :initform (make-array 0 :adjustable t :fill-pointer t)
103 (column-out-len-ptrs :initform (make-array 0 :adjustable t :fill-pointer t)
104 :accessor column-out-len-ptrs)
105 (column-precisions :initform (make-array 0 :element-type 'fixnum :adjustable t :fill-pointer t)
106 :accessor column-precisions)
107 (column-scales :initform (make-array 0 :element-type 'fixnum :adjustable t :fill-pointer t)
108 :accessor column-scales)
109 (column-nullables-p :initform (make-array 0 :element-type 'fixnum :adjustable t :fill-pointer t)
110 :accessor column-nullables-p)
111 ;;(parameter-count :initform 0 :accessor parameter-count)
112 (parameter-data-ptrs :initform (make-array 0 :adjustable t :fill-pointer t)
113 :accessor parameter-ptrs)
114 ;; a query string or a query expression object
115 (sql-expression :initform nil :initarg :sql-expression :accessor sql-expression)
116 ;; database object the query is to be run against
117 (database :initarg :database :reader query-database)
118 (active-p :initform nil :initarg :active-p :accessor query-active-p))
120 "Stores query information, like SQL query string/expression and database to run
121 the query against." ))
123 ;;; AODBC Compatible interface
125 (defun connect (&key data-source-name user password connection-string completion window-handle (autocommit t))
126 (let ((db (make-instance 'odbc-db)))
127 (unless (henv db) ;; has class allocation!
128 (setf (henv db) (%new-environment-handle)))
129 (setf (hdbc db) (%new-db-connection-handle (henv db)))
130 (if connection-string
131 (%sql-driver-connect (hdbc db)
134 (:no-prompt odbc::$SQL_DRIVER_NOPROMPT)
135 (:complete odbc::$SQL_DRIVER_COMPLETE)
136 (:prompt odbc::$SQL_DRIVER_PROMPT)
137 (:complete-required odbc::$SQL_DRIVER_COMPLETE_REQUIRED))
139 (%sql-connect (hdbc db) data-source-name user password))
140 #+ignore (setf (db-hstmt db) (%new-statement-handle (hdbc db)))
141 (when (/= (get-odbc-info db odbc::$SQL_TXN_CAPABLE) odbc::$SQL_TC_NONE)
143 (enable-autocommit (hdbc db))
144 (disable-autocommit (hdbc db))))
147 (defun disconnect (database)
148 (with-slots (hdbc queries) database
149 (dolist (query queries)
150 (if (query-active-p query)
151 (with-slots (hstmt) query
153 (%free-statement hstmt :drop)
155 (when (db-hstmt database)
156 (%free-statement (db-hstmt database) :drop))
160 (defun sql (expr &key db result-types row-count (column-names t) query
162 (declare (ignore hstmt))
165 (let ((q (db-open-query db expr :result-types result-types :width width)))
167 (values q (column-names q))
170 (multiple-value-bind (data col-names)
171 (db-query db expr :result-types result-types :width width)
174 (if (consp data) (length data) data))
176 (values data col-names))
180 (defun fetch-row (query &optional (eof-errorp t) eof-value)
181 (multiple-value-bind (row query count) (db-fetch-query-results query 1)
186 (error 'clsql:sql-database-data-error
187 :message "ODBC: Ran out of data in fetch-row"))
193 (defun close-query (query)
194 (db-close-query query))
196 (defun list-all-database-tables (&key db hstmt)
197 (declare (ignore hstmt))
198 (let ((query (get-free-query db)))
201 (with-slots (hstmt) query
202 (unless hstmt (setf hstmt (%new-statement-handle (hdbc db))))
204 (%initialize-query query nil nil)
206 (db-fetch-query-results query)
207 (coerce (column-names query) 'list))))
208 (db-close-query query))))
210 (defun list-table-indexes (table &key db unique hstmt)
211 (declare (ignore hstmt))
212 (let ((query (get-free-query db)))
215 (with-slots (hstmt) query
217 (setf hstmt (%new-statement-handle (hdbc db))))
218 (%table-statistics table hstmt :unique unique)
219 (%initialize-query query nil nil)
221 (db-fetch-query-results query)
222 (coerce (column-names query) 'list))))
223 (db-close-query query))))
225 (defun list-all-table-columns (table &key db hstmt)
226 (declare (ignore hstmt))
227 (db-describe-columns db nil nil table nil)) ;; use nil rather than "" for unspecified values
229 (defun list-all-data-sources ()
230 (let ((db (make-instance 'odbc-db)))
231 (unless (henv db) ;; has class allocation!
232 (setf (henv db) (%new-environment-handle)))
233 (%list-data-sources (henv db))))
235 (defun rr-sql (hstmt sql-statement &key db)
236 (declare (ignore hstmt sql-statement db))
237 (warn "rr-sql not implemented."))
239 ;;; Mid-level interface
241 (defun db-commit (database)
242 (%commit (henv database) (hdbc database)))
244 (defun db-rollback (database)
245 (%rollback (henv database) (hdbc database)))
247 (defun db-cancel-query (query)
248 (with-slots (hstmt) query
250 (setf (query-active-p query) nil)))
253 (defmacro with-transaction (&body body)
255 (:henv (henv ,*default-database*) :hdbc (hdbc ,*default-database*))
258 (defmethod initialize-instance :after ((query odbc-query)
259 &key sql henv hdbc &allow-other-keys)
261 (let ((hstmt (%new-statement-handle hdbc)))
262 (%sql-exec-direct sql hstmt henv hdbc)
263 (with-slots (column-count
264 column-names column-c-types column-sql-types column-data-ptrs
265 column-out-len-ptrs column-precisions column-scales
266 column-nullables-p active-p) query
267 (setf (hstmt query) hstmt)
268 (%initialize-query query nil nil)
269 (setf active-p t)))))
271 ;; one for odbc-db is missing
272 (defmethod terminate ((query odbc-query))
273 ;;(format tb::*local-output* "~%*** terminated: ~s" query)
274 (with-slots (hstmt) query
276 ;(%free-statement hstmt :drop)
277 (uffi:free-foreign-object hstmt)) ;; ??
278 (%dispose-column-ptrs query)))
280 (defun %dispose-column-ptrs (query)
281 (with-slots (column-data-ptrs column-out-len-ptrs hstmt) query
282 (loop for data-ptr across column-data-ptrs
283 when data-ptr do (uffi:free-foreign-object data-ptr))
284 (loop for out-len-ptr across column-out-len-ptrs
285 when out-len-ptr do (uffi:free-foreign-object out-len-ptr))))
287 (defmethod db-open-query ((database odbc-db) query-expression
288 &key arglen col-positions result-types width
290 (db-open-query (get-free-query database) query-expression
291 :arglen arglen :col-positions col-positions
292 :result-types result-types
293 :width (if width width (db-width database))))
295 (defmethod db-open-query ((query odbc-query) query-expression
296 &key arglen col-positions result-types width
298 (%db-execute query query-expression)
299 (%initialize-query query arglen col-positions :result-types result-types
302 (defmethod db-fetch-query-results ((database odbc-db) &optional count)
303 (db-fetch-query-results (db-query-object database) count))
305 (defmethod db-fetch-query-results ((query odbc-query) &optional count)
306 (when (query-active-p query)
307 (with-slots (column-count column-data-ptrs column-c-types column-sql-types
308 column-out-len-ptrs column-precisions hstmt computed-result-types)
310 (let* ((rows-fetched 0)
313 until (or (and count (= i count))
314 (= (%sql-fetch hstmt) odbc::$SQL_NO_DATA_FOUND))
316 (loop for result-type across computed-result-types
317 for data-ptr across column-data-ptrs
318 for c-type across column-c-types
319 for sql-type across column-sql-types
320 for out-len-ptr across column-out-len-ptrs
321 for precision across column-precisions
322 for j from 0 ; column count is zero based in lisp
326 (cond ((< 0 precision (query-width query))
327 (read-data data-ptr c-type sql-type out-len-ptr result-type))
328 ((zerop (get-cast-long out-len-ptr))
331 (read-data-in-chunks hstmt j data-ptr c-type sql-type
332 out-len-ptr result-type))))))))
333 (values rows query rows-fetched)))))
335 (defun db-query (database query-expression &key result-types width)
336 (let ((free-query (get-free-query database)))
337 (setf (sql-expression free-query) query-expression)
340 (%db-execute free-query query-expression)
341 (%initialize-query free-query nil nil :result-types result-types :width width)
342 (if (plusp (column-count free-query)) ;; KMR: Added check for commands that don't return columns
344 (db-fetch-query-results free-query nil)
345 (map 'list #'identity (column-names free-query)))
347 (result-rows-count (hstmt free-query))
349 (db-close-query free-query)
352 (defmethod %db-execute ((database odbc-db) sql-expression &key &allow-other-keys)
353 (%db-execute (get-free-query database) sql-expression))
355 (defmethod %db-execute ((query odbc-query) sql-expression &key &allow-other-keys)
356 (with-slots (henv hdbc) (odbc::query-database query)
357 (with-slots (hstmt) query
358 (unless hstmt (setf hstmt (%new-statement-handle hdbc)))
359 (setf (sql-expression query) sql-expression)
360 (%sql-exec-direct sql-expression hstmt henv hdbc)
363 ;; reuse inactive queries
364 (defun get-free-query (database)
365 "get-free-query finds or makes a nonactive query object, and then sets it to active.
366 This makes the functions db-execute-command and db-query thread safe."
367 (with-slots (queries hdbc) database
368 (or (clsql-sys:without-interrupts
369 (let ((inactive-query (find-if (lambda (query)
370 (not (query-active-p query)))
373 (with-slots (column-count column-names column-c-types
375 column-sql-types column-data-ptrs
376 column-out-len-ptrs column-precisions
377 column-scales column-nullables-p)
379 ;;(print column-data-ptrs tb::*local-output*)
380 ;;(%dispose-column-ptrs inactive-query)
382 width +max-precision+
383 ;; KMR hstmt (%new-statement-handle hdbc)
384 (fill-pointer column-names) 0
385 (fill-pointer column-c-types) 0
386 (fill-pointer column-sql-types) 0
387 (fill-pointer column-data-ptrs) 0
388 (fill-pointer column-out-len-ptrs) 0
389 (fill-pointer column-precisions) 0
390 (fill-pointer column-scales) 0
391 (fill-pointer column-nullables-p) 0))
392 (setf (query-active-p inactive-query) t))
394 (let ((new-query (make-instance 'odbc-query
396 ;;(clone-database database)
398 (push new-query queries)
401 (defmethod db-execute-command ((database odbc-db) sql-string)
402 (db-execute-command (get-free-query database) sql-string))
404 (defmethod db-execute-command ((query odbc-query) sql-string)
405 (with-slots (hstmt database) query
406 (with-slots (henv hdbc) database
407 (unless hstmt (setf hstmt (%new-statement-handle hdbc)))
409 (%sql-exec-direct sql-string hstmt henv hdbc)
410 (db-close-query query)))))
412 (defmethod %initialize-query ((database odbc-db) arglen col-positions &key result-types width)
413 (%initialize-query (db-query-object database) arglen col-positions
414 :result-types result-types
415 :width (if width width (db-width database))))
417 (defmethod %initialize-query ((query odbc-query) arglen col-positions &key result-types width)
418 (with-slots (hstmt computed-result-types
419 column-count column-names column-c-types column-sql-types
420 column-data-ptrs column-out-len-ptrs column-precisions
421 column-scales column-nullables-p)
423 (setf column-count (if arglen
424 (min arglen (result-columns-count hstmt))
425 (result-columns-count hstmt)))
426 (when width (setf (query-width query) width))
427 ;;(format tb::*local-output* "~%column-count: ~d, col-positions: ~d" column-count col-positions)
428 (labels ((initialize-column (col-nr)
429 (multiple-value-bind (name sql-type precision scale nullable-p)
430 (%describe-column hstmt (1+ col-nr))
431 ;; allocate space to bind result rows to
432 (multiple-value-bind (c-type data-ptr out-len-ptr size long-p)
433 (%allocate-bindings sql-type precision)
434 (if long-p ;; if long-p we fetch in chunks with %sql-get-data but must ensure that out_len_ptr is non zero
435 (setf (uffi:deref-pointer out-len-ptr #.odbc::$ODBC-LONG-TYPE) #.odbc::$SQL_NO_TOTAL)
436 (%bind-column hstmt col-nr c-type data-ptr (1+ size) out-len-ptr))
437 (vector-push-extend name column-names)
438 (vector-push-extend sql-type column-sql-types)
439 (vector-push-extend (sql-to-c-type sql-type) column-c-types)
440 (vector-push-extend precision column-precisions)
441 (vector-push-extend scale column-scales)
442 (vector-push-extend nullable-p column-nullables-p)
443 (vector-push-extend data-ptr column-data-ptrs)
444 (vector-push-extend out-len-ptr column-out-len-ptrs)))))
446 (dolist (col-nr col-positions)
447 (initialize-column col-nr))
448 (dotimes (col-nr column-count)
449 ;; get column information
450 (initialize-column col-nr))))
452 (setf computed-result-types (make-array column-count))
453 (dotimes (i column-count)
454 (setf (aref computed-result-types i)
456 ((consp result-types)
457 (nth i result-types))
458 ((eq result-types :auto)
459 (if (eq (aref column-sql-types i) odbc::$SQL_BIGINT)
461 (case (aref column-c-types i)
462 (#.odbc::$SQL_C_SLONG :int)
463 (#.odbc::$SQL_C_DOUBLE :double)
464 (#.odbc::$SQL_C_FLOAT :float)
465 (#.odbc::$SQL_C_SSHORT :short)
466 (#.odbc::$SQL_C_STINYINT :short)
467 (#.odbc::$SQL_BIGINT :short)
473 (defun db-close-query (query &key drop-p)
474 (with-slots (hstmt column-count column-names column-c-types column-sql-types
475 column-data-ptrs column-out-len-ptrs column-precisions
476 column-scales column-nullables-p) query
477 (let ((count (fill-pointer column-data-ptrs)))
478 (when (not (zerop count))
479 (dotimes (col-nr count)
480 (let ((data-ptr (aref column-data-ptrs col-nr))
481 (out-len-ptr (aref column-out-len-ptrs col-nr)))
482 (declare (ignorable data-ptr out-len-ptr))
483 ;; free-statment :unbind frees these
484 #+ignore (when data-ptr (uffi:free-foreign-object data-ptr))
485 #+ignore (when out-len-ptr (uffi:free-foreign-object out-len-ptr)))))
489 (%free-statement hstmt :drop)
492 (%free-statement hstmt :unbind)
493 (%free-statement hstmt :reset)
494 (%free-statement hstmt :close)))
495 (setf (query-active-p query) nil)))
498 (defmethod %read-query-data ((database odbc-db) ignore-columns)
499 (%read-query-data (db-query-object database) ignore-columns))
501 (defmethod %read-query-data ((query odbc-query) ignore-columns)
502 (with-slots (hstmt column-count column-c-types column-sql-types
503 column-data-ptrs column-out-len-ptrs column-precisions
504 computed-result-types)
506 (unless (= (odbc::SQLFetch hstmt) odbc::$SQL_NO_DATA_FOUND)
508 (loop for col-nr from 0 to (- column-count
509 (if (eq ignore-columns :last) 2 1))
510 for result-type across computed-result-types
512 (let ((precision (aref column-precisions col-nr))
513 (sql-type (aref column-sql-types col-nr)))
514 (cond ((or (< 0 precision (query-width query))
515 (and (zerop precision) (not (find sql-type '($SQL_C_CHAR)))))
516 (read-data (aref column-data-ptrs col-nr)
517 (aref column-c-types col-nr)
519 (aref column-out-len-ptrs col-nr)
521 ((zerop (get-cast-long (aref column-out-len-ptrs col-nr)))
524 (read-data-in-chunks hstmt col-nr
525 (aref column-data-ptrs col-nr)
526 (aref column-c-types col-nr)
527 (aref column-sql-types col-nr)
528 (aref column-out-len-ptrs col-nr)
532 (defmethod db-map-query ((database odbc-db) type function query-exp &key result-types)
533 (db-map-query (get-free-query database) type function query-exp :result-types result-types))
535 (defmethod db-map-query ((query odbc-query) type function query-exp &key result-types)
536 (declare (ignore type)) ; preliminary. Do a type coersion here
537 (%db-execute query (sql-expression query-exp))
540 (%initialize-query query nil nil :result-types result-types)
542 (loop for data = (%read-query-data query nil)
544 do (apply function data)))
545 ;; dispose of memory and set query inactive or get rid of it
546 (db-close-query query)))
548 (defun db-map-bind-query (query type function
550 (declare (ignore type)) ; preliminary. Do a type coersion here
553 (apply #'%db-bind-execute query parameters)
556 while (setf data (%read-query-data query nil))
557 do (apply function data)))
558 ;; dispose of memory and set query inactive or get rid of it
559 (%db-reset-query query)))
561 ;; does not always return exactly a lisp type...
562 (defun sql-to-lisp-type (sql-type)
564 ((#.odbc::$SQL_CHAR #.odbc::$SQL_VARCHAR #.odbc::$SQL_LONGVARCHAR) :string)
565 ((#.odbc::$SQL_NUMERIC #.odbc::$SQL_DECIMAL #.odbc::$SQL_BIGINT) :string) ; ??
566 (#.odbc::$SQL_INTEGER #.odbc::$ODBC-LONG-TYPE)
567 (#.odbc::$SQL_SMALLINT :short)
568 ((#.odbc::$SQL_FLOAT #.odbc::$SQL_DOUBLE) #.odbc::$ODBC-LONG-TYPE)
569 (#.odbc::$SQL_REAL #.odbc::$ODBC-LONG-TYPE)
570 ((#.odbc::$SQL_DATE #.odbc::$SQL_TYPE_DATE) 'sql-c-date)
571 ((#.odbc::$SQL_TIME #.odbc::$SQL_TYPE_TIME) 'sql-c-time)
572 ((#.odbc::$SQL_TIMESTAMP #.odbc::$SQL_TYPE_TIMESTAMP) 'sql-c-timestamp)
573 ;;((#.odbc::$SQL_BINARY #.odbc::$SQL_VARBINARY #.odbc::$SQL_LONGVARBINARY) odbc::$SQL_C_BINARY) ; ??
574 (#.odbc::$SQL_TINYINT :short)
575 ;;(#.odbc::$SQL_BIT odbc::$SQL_C_BIT) ; ??
576 ((#.odbc::$SQL_VARBINARY #.odbc::$SQL_LONGVARBINARY) :binary)
581 (defmethod db-prepare-statement ((database odbc-db) sql
582 &key parameter-table parameter-columns)
583 (with-slots (hdbc) database
584 (let ((query (get-free-query database)))
585 (with-slots (hstmt) query
586 (unless hstmt (setf hstmt (%new-statement-handle hdbc))))
587 (db-prepare-statement query sql parameter-table parameter-columns))))
589 (defmethod db-prepare-statement ((query odbc-query) (sql string)
590 &key parameter-table parameter-columns)
591 ;; this is a workaround to get hold of the column types when the driver does not
592 ;; support SQLDescribeParam. To do: put code in here for drivers that do
594 (unless (string-equal sql "insert" :end1 6)
595 (error 'clsql:sql-database-error
597 "Only insert expressions are supported in literal ODBC: '~a'." sql)))
598 (%db-execute query (format nil "select ~{~a~^,~} from ~a where 0 = 1"
599 (or parameter-columns '("*")) parameter-table))
600 (%initialize-query query nil nil)
601 (with-slots (hstmt) query
602 (%free-statement hstmt :unbind)
603 (%free-statement hstmt :reset)
604 (setf (sql-expression query) sql)
605 (%sql-prepare hstmt sql))
609 (defun %db-bind-execute (query &rest parameters)
610 (with-slots (hstmt parameter-data-ptrs) query
611 (loop for parameter in parameters
612 with data-ptr and size and parameter-string
614 (setf parameter-string
615 (if (stringp parameter)
617 (write-to-string parameter))
618 size (length parameter-string)
620 (uffi:allocate-foreign-string (1+ size)))
621 (vector-push-extend data-ptr parameter-data-ptrs)
623 hstmt (1- (fill-pointer parameter-data-ptrs)) odbc::$SQL_PARAM_INPUT
624 odbc::$SQL_C_CHAR ; (aref column-c-types parameter-count)
625 odbc::$SQL_CHAR ; sql-type
626 (query-width query) ;precision ; this should be the actual precision!
628 0 ;; should be calculated for odbc::$SQL_DECIMAL,
629 ;;$SQL_NUMERIC and odbc::$SQL_TIMESTAMP
630 data-ptr ;; = rgbValue
633 ;; change this for output and binary input! (see 3-32)
635 (%put-str data-ptr parameter-string size))
636 (%sql-execute hstmt)))
639 (defun %db-reset-query (query)
640 (with-slots (hstmt parameter-data-ptrs) query
642 (db-fetch-query-results query nil)
643 (%free-statement hstmt :reset) ;; but _not_ :unbind !
644 (%free-statement hstmt :close)
645 (dotimes (param-nr (fill-pointer parameter-data-ptrs))
646 (let ((data-ptr (aref parameter-data-ptrs param-nr)))
647 (when data-ptr (uffi:free-foreign-object data-ptr))))
648 (setf (fill-pointer parameter-data-ptrs) 0))))
650 (defun data-parameter-ptr (hstmt)
651 (uffi:with-foreign-object (param-ptr :pointer-void)
652 (let ((return-code (%sql-param-data hstmt param-ptr)))
653 ;;(format t "~%return-code from %sql-param-data: ~a~%" return-code)
654 (when (= return-code odbc::$SQL_NEED_DATA)
655 ;;(ffc::%pointer-to-address (%get-ptr param-ptr))
656 (uffi:deref-pointer param-ptr :pointer-void)))))
658 ;; database inquiery functions
660 (defun db-describe-columns (database table-qualifier table-owner
661 table-name column-name)
662 (with-slots (hdbc) database
663 (%describe-columns hdbc table-qualifier table-owner table-name column-name)))
665 ;; should translate info-type integers to keywords in order to make this
667 (defmethod get-odbc-info ((database odbc-db) info-type)
668 (with-slots (hdbc info) database
669 (or (gethash info-type info)
670 (setf (gethash info-type info)
671 (%sql-get-info hdbc info-type)))))
673 (defmethod get-odbc-info ((query odbc-query) info-type)
674 (get-odbc-info (odbc::query-database query) info-type))
677 ;; How does this differ from list-data-sources?
678 (defgeneric db-data-sources (db-type))
679 (defmethod db-data-sources ((db-type (eql :odbc)))
680 "Returns a list of (data-source description) - pairs"
681 (let ((henv (%new-environment-handle)))
683 (loop with direction = :first
684 for data-source+description
685 = (multiple-value-list (%sql-data-sources henv :direction direction))
686 while (car data-source+description)
687 collect data-source+description
688 do (setf direction :next))
689 (%sql-free-environment henv))))