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 'fixnum :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 (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 (%sql-connect (hdbc db) data-source-name user password)
133 #+ignore (setf (db-hstmt db) (%new-statement-handle (hdbc db)))
134 (when (/= (get-odbc-info db odbc::$SQL_TXN_CAPABLE) odbc::$SQL_TC_NONE)
136 (enable-autocommit (hdbc db))
137 (disable-autocommit (hdbc db))))
140 (defun disconnect (database)
141 (with-slots (hdbc queries) database
142 (dolist (query queries)
143 (if (query-active-p query)
144 (with-slots (hstmt) query
146 (%free-statement hstmt :drop)
148 (when (db-hstmt database)
149 (%free-statement (db-hstmt database) :drop))
153 (defun sql (expr &key db result-types row-count (column-names t) query
155 (declare (ignore hstmt))
158 (let ((q (db-open-query db expr :result-types result-types :width width)))
160 (values q (column-names q))
163 (multiple-value-bind (data col-names)
164 (db-query db expr :result-types result-types :width width)
167 (if (consp data) (length data) data))
169 (values data col-names))
173 (defun fetch-row (query &optional (eof-errorp t) eof-value)
174 (multiple-value-bind (row query count) (db-fetch-query-results query 1)
179 (error 'clsql:sql-database-data-error
180 :message "ODBC: Ran out of data in fetch-row"))
186 (defun close-query (query)
187 (db-close-query query))
189 (defun list-all-database-tables (&key db hstmt)
190 (declare (ignore hstmt))
191 (let ((query (get-free-query db)))
194 (with-slots (hstmt) query
195 (unless hstmt (setf hstmt (%new-statement-handle (hdbc db))))
197 (%initialize-query query nil nil)
199 (db-fetch-query-results query)
200 (coerce (column-names query) 'list))))
201 (db-close-query query))))
203 (defun list-table-indexes (table &key db unique hstmt)
204 (declare (ignore hstmt))
205 (let ((query (get-free-query db)))
208 (with-slots (hstmt) query
210 (setf hstmt (%new-statement-handle (hdbc db))))
211 (%table-statistics table hstmt :unique unique)
212 (%initialize-query query nil nil)
214 (db-fetch-query-results query)
215 (coerce (column-names query) 'list))))
216 (db-close-query query))))
218 (defun list-all-table-columns (table &key db hstmt)
219 (declare (ignore hstmt))
220 (db-describe-columns db "" "" table ""))
222 (defun list-all-data-sources ()
223 (let ((db (make-instance 'odbc-db)))
224 (unless (henv db) ;; has class allocation!
225 (setf (henv db) (%new-environment-handle)))
226 (%list-data-sources (henv db))))
228 (defun rr-sql (hstmt sql-statement &key db)
229 (declare (ignore hstmt sql-statement db))
230 (warn "rr-sql not implemented."))
232 ;;; Mid-level interface
234 (defun db-commit (database)
235 (%commit (henv database) (hdbc database)))
237 (defun db-rollback (database)
238 (%rollback (henv database) (hdbc database)))
240 (defun db-cancel-query (query)
241 (with-slots (hstmt) query
243 (setf (query-active-p query) nil)))
246 (defmacro with-transaction (&body body)
248 (:henv (henv ,*default-database*) :hdbc (hdbc ,*default-database*))
251 (defmethod initialize-instance :after ((query odbc-query)
252 &key sql henv hdbc &allow-other-keys)
254 (let ((hstmt (%new-statement-handle hdbc)))
255 (%sql-exec-direct sql hstmt henv hdbc)
256 (with-slots (column-count
257 column-names column-c-types column-sql-types column-data-ptrs
258 column-out-len-ptrs column-precisions column-scales
259 column-nullables-p active-p) query
260 (setf (hstmt query) hstmt)
261 (%initialize-query query nil nil)
262 (setf active-p t)))))
264 ;; one for odbc-db is missing
265 (defmethod terminate ((query odbc-query))
266 ;;(format tb::*local-output* "~%*** terminated: ~s" query)
267 (with-slots (hstmt) query
269 ;(%free-statement hstmt :drop)
270 (uffi:free-foreign-object hstmt)) ;; ??
271 (%dispose-column-ptrs query)))
273 (defun %dispose-column-ptrs (query)
274 (with-slots (column-data-ptrs column-out-len-ptrs hstmt) query
275 (loop for data-ptr across column-data-ptrs
276 when data-ptr do (uffi:free-foreign-object data-ptr))
277 (loop for out-len-ptr across column-out-len-ptrs
278 when out-len-ptr do (uffi:free-foreign-object out-len-ptr))))
280 (defmethod db-open-query ((database odbc-db) query-expression
281 &key arglen col-positions result-types width
283 (db-open-query (get-free-query database) query-expression
284 :arglen arglen :col-positions col-positions
285 :result-types result-types
286 :width (if width width (db-width database))))
288 (defmethod db-open-query ((query odbc-query) query-expression
289 &key arglen col-positions result-types width
291 (%db-execute query query-expression)
292 (%initialize-query query arglen col-positions :result-types result-types
295 (defmethod db-fetch-query-results ((database odbc-db) &optional count)
296 (db-fetch-query-results (db-query-object database) count))
298 (defmethod db-fetch-query-results ((query odbc-query) &optional count)
299 (when (query-active-p query)
300 (with-slots (column-count column-data-ptrs column-c-types column-sql-types
301 column-out-len-ptrs column-precisions hstmt computed-result-types)
303 (let* ((rows-fetched 0)
306 until (or (and count (= i count))
307 (= (%sql-fetch hstmt) odbc::$SQL_NO_DATA_FOUND))
309 (loop for result-type across computed-result-types
310 for data-ptr across column-data-ptrs
311 for c-type across column-c-types
312 for sql-type across column-sql-types
313 for out-len-ptr across column-out-len-ptrs
314 for precision across column-precisions
315 for j from 0 ; column count is zero based in lisp
319 (cond ((< 0 precision (query-width query))
320 (read-data data-ptr c-type sql-type out-len-ptr result-type))
321 ((zerop (get-cast-long out-len-ptr))
324 (read-data-in-chunks hstmt j data-ptr c-type sql-type
325 out-len-ptr result-type))))))))
326 (values rows query rows-fetched)))))
328 (defun db-query (database query-expression &key result-types width)
329 (let ((free-query (get-free-query database)))
330 (setf (sql-expression free-query) query-expression)
333 (%db-execute free-query query-expression)
334 (%initialize-query free-query nil nil :result-types result-types :width width)
335 (if (plusp (column-count free-query)) ;; KMR: Added check for commands that don't return columns
337 (db-fetch-query-results free-query nil)
338 (map 'list #'identity (column-names free-query)))
340 (result-rows-count (hstmt free-query))
342 (db-close-query free-query)
345 (defmethod %db-execute ((database odbc-db) sql-expression &key &allow-other-keys)
346 (%db-execute (get-free-query database) sql-expression))
348 (defmethod %db-execute ((query odbc-query) sql-expression &key &allow-other-keys)
349 (with-slots (henv hdbc) (odbc::query-database query)
350 (with-slots (hstmt) query
351 (unless hstmt (setf hstmt (%new-statement-handle hdbc)))
352 (setf (sql-expression query) sql-expression)
353 (%sql-exec-direct sql-expression hstmt henv hdbc)
356 ;; reuse inactive queries
357 (defun get-free-query (database)
358 "get-free-query finds or makes a nonactive query object, and then sets it to active.
359 This makes the functions db-execute-command and db-query thread safe."
360 (with-slots (queries hdbc) database
361 (or (clsql-sys:without-interrupts
362 (let ((inactive-query (find-if (lambda (query)
363 (not (query-active-p query)))
366 (with-slots (column-count column-names column-c-types
368 column-sql-types column-data-ptrs
369 column-out-len-ptrs column-precisions
370 column-scales column-nullables-p)
372 ;;(print column-data-ptrs tb::*local-output*)
373 ;;(%dispose-column-ptrs inactive-query)
375 width +max-precision+
376 ;; KMR hstmt (%new-statement-handle hdbc)
377 (fill-pointer column-names) 0
378 (fill-pointer column-c-types) 0
379 (fill-pointer column-sql-types) 0
380 (fill-pointer column-data-ptrs) 0
381 (fill-pointer column-out-len-ptrs) 0
382 (fill-pointer column-precisions) 0
383 (fill-pointer column-scales) 0
384 (fill-pointer column-nullables-p) 0))
385 (setf (query-active-p inactive-query) t))
387 (let ((new-query (make-instance 'odbc-query
389 ;;(clone-database database)
391 (push new-query queries)
394 (defmethod db-execute-command ((database odbc-db) sql-string)
395 (db-execute-command (get-free-query database) sql-string))
397 (defmethod db-execute-command ((query odbc-query) sql-string)
398 (with-slots (hstmt database) query
399 (with-slots (henv hdbc) database
400 (unless hstmt (setf hstmt (%new-statement-handle hdbc)))
402 (%sql-exec-direct sql-string hstmt henv hdbc)
403 (db-close-query query)))))
405 (defmethod %initialize-query ((database odbc-db) arglen col-positions &key result-types width)
406 (%initialize-query (db-query-object database) arglen col-positions
407 :result-types result-types
408 :width (if width width (db-width database))))
410 (defmethod %initialize-query ((query odbc-query) arglen col-positions &key result-types width)
411 (with-slots (hstmt computed-result-types
412 column-count column-names column-c-types column-sql-types
413 column-data-ptrs column-out-len-ptrs column-precisions
414 column-scales column-nullables-p)
416 (setf column-count (if arglen
417 (min arglen (result-columns-count hstmt))
418 (result-columns-count hstmt)))
419 (when width (setf (query-width query) width))
420 ;;(format tb::*local-output* "~%column-count: ~d, col-positions: ~d" column-count col-positions)
421 (labels ((initialize-column (col-nr)
422 (multiple-value-bind (name sql-type precision scale nullable-p)
423 (%describe-column hstmt (1+ col-nr))
424 ;; allocate space to bind result rows to
425 (multiple-value-bind (c-type data-ptr out-len-ptr size long-p)
426 (%allocate-bindings sql-type precision)
427 (unless long-p ;; if long-p we fetch in chunks with %sql-get-data
428 (%bind-column hstmt col-nr c-type data-ptr (1+ size) out-len-ptr))
429 (vector-push-extend name column-names)
430 (vector-push-extend sql-type column-sql-types)
431 (vector-push-extend (sql-to-c-type sql-type) column-c-types)
432 (vector-push-extend precision column-precisions)
433 (vector-push-extend scale column-scales)
434 (vector-push-extend nullable-p column-nullables-p)
435 (vector-push-extend data-ptr column-data-ptrs)
436 (vector-push-extend out-len-ptr column-out-len-ptrs)))))
438 (dolist (col-nr col-positions)
439 (initialize-column col-nr))
440 (dotimes (col-nr column-count)
441 ;; get column information
442 (initialize-column col-nr))))
444 (setf computed-result-types (make-array column-count))
445 (dotimes (i column-count)
446 (setf (aref computed-result-types i)
448 ((consp result-types)
449 (nth i result-types))
450 ((eq result-types :auto)
451 (if (eq (aref column-sql-types i) odbc::$SQL_BIGINT)
453 (case (aref column-c-types i)
454 (#.odbc::$SQL_C_SLONG :int)
455 (#.odbc::$SQL_C_DOUBLE :double)
456 (#.odbc::$SQL_C_FLOAT :float)
457 (#.odbc::$SQL_C_SSHORT :short)
458 (#.odbc::$SQL_C_STINYINT :short)
459 (#.odbc::$SQL_BIGINT :short)
465 (defun db-close-query (query &key drop-p)
466 (with-slots (hstmt column-count column-names column-c-types column-sql-types
467 column-data-ptrs column-out-len-ptrs column-precisions
468 column-scales column-nullables-p) query
469 (let ((count (fill-pointer column-data-ptrs)))
470 (when (not (zerop count))
471 (dotimes (col-nr count)
472 (let ((data-ptr (aref column-data-ptrs col-nr))
473 (out-len-ptr (aref column-out-len-ptrs col-nr)))
474 (declare (ignorable data-ptr out-len-ptr))
475 ;; free-statment :unbind frees these
476 #+ignore (when data-ptr (uffi:free-foreign-object data-ptr))
477 #+ignore (when out-len-ptr (uffi:free-foreign-object out-len-ptr)))))
481 (%free-statement hstmt :drop)
484 (%free-statement hstmt :unbind)
485 (%free-statement hstmt :reset)
486 (%free-statement hstmt :close)))
487 (setf (query-active-p query) nil)))
490 (defmethod %read-query-data ((database odbc-db) ignore-columns)
491 (%read-query-data (db-query-object database) ignore-columns))
493 (defmethod %read-query-data ((query odbc-query) ignore-columns)
494 (with-slots (hstmt column-count column-c-types column-sql-types
495 column-data-ptrs column-out-len-ptrs column-precisions
496 computed-result-types)
498 (unless (= (odbc::SQLFetch hstmt) odbc::$SQL_NO_DATA_FOUND)
500 (loop for col-nr from 0 to (- column-count
501 (if (eq ignore-columns :last) 2 1))
502 for result-type across computed-result-types
504 (let ((precision (aref column-precisions col-nr))
505 (sql-type (aref column-sql-types col-nr)))
506 (cond ((or (< 0 precision (query-width query))
507 (and (zerop precision) (not (find sql-type '($SQL_C_CHAR)))))
508 (read-data (aref column-data-ptrs col-nr)
509 (aref column-c-types col-nr)
511 (aref column-out-len-ptrs col-nr)
513 ((zerop (get-cast-long (aref column-out-len-ptrs col-nr)))
516 (read-data-in-chunks hstmt col-nr
517 (aref column-data-ptrs col-nr)
518 (aref column-c-types col-nr)
519 (aref column-sql-types col-nr)
520 (aref column-out-len-ptrs col-nr)
524 (defmethod db-map-query ((database odbc-db) type function query-exp &key result-types)
525 (db-map-query (get-free-query database) type function query-exp :result-types result-types))
527 (defmethod db-map-query ((query odbc-query) type function query-exp &key result-types)
528 (declare (ignore type)) ; preliminary. Do a type coersion here
529 (%db-execute query (sql-expression query-exp))
532 (%initialize-query query nil nil :result-types result-types)
534 (loop for data = (%read-query-data query nil)
536 do (apply function data)))
537 ;; dispose of memory and set query inactive or get rid of it
538 (db-close-query query)))
540 (defun db-map-bind-query (query type function
542 (declare (ignore type)) ; preliminary. Do a type coersion here
545 (apply #'%db-bind-execute query parameters)
548 while (setf data (%read-query-data query nil))
549 do (apply function data)))
550 ;; dispose of memory and set query inactive or get rid of it
551 (%db-reset-query query)))
553 ;; does not always return exactly a lisp type...
554 (defun sql-to-lisp-type (sql-type)
556 ((#.odbc::$SQL_CHAR #.odbc::$SQL_VARCHAR #.odbc::$SQL_LONGVARCHAR) :string)
557 ((#.odbc::$SQL_NUMERIC #.odbc::$SQL_DECIMAL #.odbc::$SQL_BIGINT) :string) ; ??
558 (#.odbc::$SQL_INTEGER #.odbc::$ODBC-LONG-TYPE)
559 (#.odbc::$SQL_SMALLINT :short)
560 ((#.odbc::$SQL_FLOAT #.odbc::$SQL_DOUBLE) #.odbc::$ODBC-LONG-TYPE)
561 (#.odbc::$SQL_REAL #.odbc::$ODBC-LONG-TYPE)
562 ((#.odbc::$SQL_DATE #.odbc::$SQL_TYPE_DATE) 'sql-c-date)
563 ((#.odbc::$SQL_TIME #.odbc::$SQL_TYPE_TIME) 'sql-c-time)
564 ((#.odbc::$SQL_TIMESTAMP #.odbc::$SQL_TYPE_TIMESTAMP) 'sql-c-timestamp)
565 ;;((#.odbc::$SQL_BINARY #.odbc::$SQL_VARBINARY #.odbc::$SQL_LONGVARBINARY) odbc::$SQL_C_BINARY) ; ??
566 (#.odbc::$SQL_TINYINT :short)
567 ;;(#.odbc::$SQL_BIT odbc::$SQL_C_BIT) ; ??
568 ((#.odbc::$SQL_VARBINARY #.odbc::$SQL_LONGVARBINARY) :binary)
573 (defmethod db-prepare-statement ((database odbc-db) sql
574 &key parameter-table parameter-columns)
575 (with-slots (hdbc) database
576 (let ((query (get-free-query database)))
577 (with-slots (hstmt) query
578 (unless hstmt (setf hstmt (%new-statement-handle hdbc))))
579 (db-prepare-statement query sql parameter-table parameter-columns))))
581 (defmethod db-prepare-statement ((query odbc-query) (sql string)
582 &key parameter-table parameter-columns)
583 ;; this is a workaround to get hold of the column types when the driver does not
584 ;; support SQLDescribeParam. To do: put code in here for drivers that do
586 (unless (string-equal sql "insert" :end1 6)
587 (error 'clsql:sql-database-error
589 "Only insert expressions are supported in literal ODBC: '~a'." sql)))
590 (%db-execute query (format nil "select ~{~a~^,~} from ~a where 0 = 1"
591 (or parameter-columns '("*")) parameter-table))
592 (%initialize-query query nil nil)
593 (with-slots (hstmt) query
594 (%free-statement hstmt :unbind)
595 (%free-statement hstmt :reset)
596 (setf (sql-expression query) sql)
597 (%sql-prepare hstmt sql))
601 (defun %db-bind-execute (query &rest parameters)
602 (with-slots (hstmt parameter-data-ptrs) query
603 (loop for parameter in parameters
604 with data-ptr and size and parameter-string
606 (setf parameter-string
607 (if (stringp parameter)
609 (write-to-string parameter))
610 size (length parameter-string)
612 (uffi:allocate-foreign-string (1+ size)))
613 (vector-push-extend data-ptr parameter-data-ptrs)
615 hstmt (1- (fill-pointer parameter-data-ptrs)) odbc::$SQL_PARAM_INPUT
616 odbc::$SQL_C_CHAR ; (aref column-c-types parameter-count)
617 odbc::$SQL_CHAR ; sql-type
618 (query-width query) ;precision ; this should be the actual precision!
620 0 ;; should be calculated for odbc::$SQL_DECIMAL,
621 ;;$SQL_NUMERIC and odbc::$SQL_TIMESTAMP
622 data-ptr ;; = rgbValue
625 ;; change this for output and binary input! (see 3-32)
627 (%put-str data-ptr parameter-string size))
628 (%sql-execute hstmt)))
631 (defun %db-reset-query (query)
632 (with-slots (hstmt parameter-data-ptrs) query
634 (db-fetch-query-results query nil)
635 (%free-statement hstmt :reset) ;; but _not_ :unbind !
636 (%free-statement hstmt :close)
637 (dotimes (param-nr (fill-pointer parameter-data-ptrs))
638 (let ((data-ptr (aref parameter-data-ptrs param-nr)))
639 (when data-ptr (uffi:free-foreign-object data-ptr))))
640 (setf (fill-pointer parameter-data-ptrs) 0))))
642 (defun data-parameter-ptr (hstmt)
643 (uffi:with-foreign-object (param-ptr :pointer-void)
644 (let ((return-code (%sql-param-data hstmt param-ptr)))
645 ;;(format t "~%return-code from %sql-param-data: ~a~%" return-code)
646 (when (= return-code odbc::$SQL_NEED_DATA)
647 ;;(ffc::%pointer-to-address (%get-ptr param-ptr))
648 (uffi:deref-pointer param-ptr :pointer-void)))))
650 ;; database inquiery functions
652 (defun db-describe-columns (database table-qualifier table-owner
653 table-name column-name)
654 (with-slots (hdbc) database
655 (%describe-columns hdbc table-qualifier table-owner table-name column-name)))
657 ;; should translate info-type integers to keywords in order to make this
659 (defmethod get-odbc-info ((database odbc-db) info-type)
660 (with-slots (hdbc info) database
661 (or (gethash info-type info)
662 (setf (gethash info-type info)
663 (%sql-get-info hdbc info-type)))))
665 (defmethod get-odbc-info ((query odbc-query) info-type)
666 (get-odbc-info (odbc::query-database query) info-type))
669 ;; How does this differ from list-data-sources?
670 (defgeneric db-data-sources (db-type))
671 (defmethod db-data-sources ((db-type (eql :odbc)))
672 "Returns a list of (data-source description) - pairs"
673 (let ((henv (%new-environment-handle)))
675 (loop with direction = :first
676 for data-source+description
677 = (multiple-value-list (%sql-data-sources henv :direction direction))
678 while (car data-source+description)
679 collect data-source+description
680 do (setf direction :next))
681 (%sql-free-environment henv))))