1 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
2 ;;;; *************************************************************************
3 ;;;; FILE IDENTIFICATION
5 ;;;; Name: mysql-sql.lisp
6 ;;;; Purpose: High-level MySQL interface using UFFI
7 ;;;; Date Started: Feb 2002
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 (defpackage #:clsql-mysql
17 (:use #:common-lisp #:clsql-sys #:mysql #:clsql-uffi)
18 (:export #:mysql-database)
19 (:documentation "This is the CLSQL interface to MySQL."))
21 (in-package #:clsql-mysql)
23 ;;; Field conversion functions
25 (defun result-field-names (num-fields res-ptr)
26 (declare (fixnum num-fields))
28 (field-vec (mysql-fetch-fields res-ptr)))
29 (dotimes (i num-fields)
31 (let* ((field (uffi:deref-array field-vec '(:array mysql-field) i))
32 (name (uffi:convert-from-foreign-string
33 (uffi:get-slot-value field 'mysql-field 'mysql::name))))
37 (defun make-type-list-for-auto (num-fields res-ptr)
38 (declare (fixnum num-fields))
40 (field-vec (mysql-fetch-fields res-ptr)))
41 (dotimes (i num-fields)
43 (let* ((field (uffi:deref-array field-vec '(:array mysql-field) i))
44 (type (uffi:get-slot-value field 'mysql-field 'type)))
47 ((#.mysql-field-types#tiny
48 #.mysql-field-types#short
49 #.mysql-field-types#int24
50 #.mysql-field-types#long)
52 (#.mysql-field-types#longlong
54 ((#.mysql-field-types#double
55 #.mysql-field-types#float
56 #.mysql-field-types#decimal)
61 (nreverse new-types)))
63 (defun canonicalize-types (types num-fields res-ptr)
65 (let ((auto-list (make-type-list-for-auto num-fields res-ptr)))
68 (canonicalize-type-list types auto-list))
74 (defmethod database-initialize-database-type ((database-type (eql :mysql)))
77 (uffi:def-type mysql-mysql-ptr-def (* mysql-mysql))
78 (uffi:def-type mysql-row-def mysql-row)
79 (uffi:def-type mysql-mysql-res-ptr-def (* mysql-mysql-res))
81 (defclass mysql-database (database)
82 ((mysql-ptr :accessor database-mysql-ptr :initarg :mysql-ptr
83 :type mysql-mysql-ptr-def)))
85 (defmethod database-type ((database mysql-database))
88 (defmethod database-name-from-spec (connection-spec (database-type (eql :mysql)))
89 (check-connection-spec connection-spec database-type (host db user password))
90 (destructuring-bind (host db user password) connection-spec
91 (declare (ignore password))
93 (if host host "localhost")
96 (defmethod database-connect (connection-spec (database-type (eql :mysql)))
97 (check-connection-spec connection-spec database-type (host db user password))
98 (destructuring-bind (host db user password) connection-spec
99 (let ((mysql-ptr (mysql-init (uffi:make-null-pointer 'mysql-mysql)))
101 (if (uffi:null-pointer-p mysql-ptr)
102 (error 'sql-connection-error
103 :database-type database-type
104 :connection-spec connection-spec
105 :error-id (mysql-errno mysql-ptr)
106 :message (mysql-error-string mysql-ptr))
107 (uffi:with-cstrings ((host-native host)
109 (password-native password)
111 (socket-native socket))
112 (let ((error-occurred nil))
114 (if (uffi:null-pointer-p
116 mysql-ptr host-native user-native password-native
117 db-native 0 socket-native 0))
119 (setq error-occurred t)
120 (error 'sql-connection-error
121 :database-type database-type
122 :connection-spec connection-spec
123 :error-id (mysql-errno mysql-ptr)
124 :message (mysql-error-string mysql-ptr)))
125 (make-instance 'mysql-database
126 :name (database-name-from-spec connection-spec
128 :database-type :mysql
129 :connection-spec connection-spec
130 :mysql-ptr mysql-ptr))
131 (when error-occurred (mysql-close mysql-ptr)))))))))
134 (defmethod database-disconnect ((database mysql-database))
135 (mysql-close (database-mysql-ptr database))
136 (setf (database-mysql-ptr database) nil)
140 (defmethod database-query (query-expression (database mysql-database)
141 result-types field-names)
142 (declare (optimize (speed 3) (safety 0) (debug 0) (space 0)))
143 (let ((mysql-ptr (database-mysql-ptr database)))
144 (uffi:with-cstring (query-native query-expression)
145 (if (zerop (mysql-real-query mysql-ptr query-native
146 (length query-expression)))
147 (let ((res-ptr (mysql-use-result mysql-ptr)))
150 (let ((num-fields (mysql-num-fields res-ptr)))
151 (declare (fixnum num-fields))
152 (setq result-types (canonicalize-types
153 result-types num-fields
156 (loop for row = (mysql-fetch-row res-ptr)
157 for lengths = (mysql-fetch-lengths res-ptr)
158 until (uffi:null-pointer-p row)
160 (do* ((rlist (make-list num-fields))
162 (pos rlist (cdr pos)))
163 ((= i num-fields) rlist)
167 (uffi:deref-array row '(:array
171 (uffi:deref-array lengths '(:array :unsigned-long)
174 (result-field-names num-fields res-ptr))))
175 (mysql-free-result res-ptr))
176 (error 'sql-database-data-error
178 :expression query-expression
179 :error-id (mysql-errno mysql-ptr)
180 :message (mysql-error-string mysql-ptr))))
181 (error 'sql-database-data-error
183 :expression query-expression
184 :error-id (mysql-errno mysql-ptr)
185 :message (mysql-error-string mysql-ptr))))))
187 (defmethod database-execute-command (sql-expression (database mysql-database))
188 (uffi:with-cstring (sql-native sql-expression)
189 (let ((mysql-ptr (database-mysql-ptr database)))
190 (declare (type mysql-mysql-ptr-def mysql-ptr))
191 (if (zerop (mysql-real-query mysql-ptr sql-native
192 (length sql-expression)))
194 (error 'sql-database-data-error
196 :expression sql-expression
197 :error-id (mysql-errno mysql-ptr)
198 :message (mysql-error-string mysql-ptr))))))
201 (defstruct mysql-result-set
202 (res-ptr (uffi:make-null-pointer 'mysql-mysql-res) :type mysql-mysql-res-ptr-def)
203 (types nil :type list)
204 (num-fields 0 :type fixnum)
205 (full-set nil :type boolean))
208 (defmethod database-query-result-set ((query-expression string)
209 (database mysql-database)
210 &key full-set result-types)
211 (uffi:with-cstring (query-native query-expression)
212 (let ((mysql-ptr (database-mysql-ptr database)))
213 (declare (type mysql-mysql-ptr-def mysql-ptr))
214 (if (zerop (mysql-real-query mysql-ptr query-native
215 (length query-expression)))
216 (let ((res-ptr (if full-set
217 (mysql-store-result mysql-ptr)
218 (mysql-use-result mysql-ptr))))
219 (declare (type mysql-mysql-res-ptr-def res-ptr))
220 (if (not (uffi:null-pointer-p res-ptr))
221 (let* ((num-fields (mysql-num-fields res-ptr))
222 (result-set (make-mysql-result-set
224 :num-fields num-fields
228 result-types num-fields
233 (mysql-num-rows res-ptr))
236 (error 'sql-database-data-error
238 :expression query-expression
239 :error-id (mysql-errno mysql-ptr)
240 :message (mysql-error-string mysql-ptr))))
241 (error 'sql-database-data-error
243 :expression query-expression
244 :error-id (mysql-errno mysql-ptr)
245 :message (mysql-error-string mysql-ptr))))))
247 (defmethod database-dump-result-set (result-set (database mysql-database))
248 (mysql-free-result (mysql-result-set-res-ptr result-set))
252 (defmethod database-store-next-row (result-set (database mysql-database) list)
253 (let* ((res-ptr (mysql-result-set-res-ptr result-set))
254 (row (mysql-fetch-row res-ptr))
255 (lengths (mysql-fetch-lengths res-ptr))
256 (types (mysql-result-set-types result-set)))
257 (declare (type mysql-mysql-res-ptr-def res-ptr)
258 (type mysql-row-def row))
259 (unless (uffi:null-pointer-p row)
260 (loop for i from 0 below (mysql-result-set-num-fields result-set)
265 (uffi:deref-array row '(:array (* :unsigned-char)) i)
268 (uffi:deref-array lengths '(:array :unsigned-long) i))))
272 ;; Table and attribute introspection
274 (defmethod database-list-tables ((database mysql-database) &key (owner nil))
275 (declare (ignore owner))
276 (remove-if #'(lambda (s)
277 (and (>= (length s) 11)
278 (string-equal (subseq s 0 11) "_CLSQL_SEQ_")))
279 (mapcar #'car (database-query "SHOW TABLES" database nil nil))))
281 ;; MySQL 4.1 does not support views
282 (defmethod database-list-views ((database mysql-database)
284 (declare (ignore owner))
287 (defmethod database-list-indexes ((database mysql-database)
290 (dolist (table (database-list-tables database :owner owner) result)
292 (append (database-list-table-indexes table database :owner owner)
295 (defmethod database-list-table-indexes (table (database mysql-database)
297 (declare (ignore owner))
299 (rows (database-query
300 (format nil "SHOW INDEX FROM ~A" (string-upcase table))
303 ((null rows) (nreverse results))
304 (let ((col (nth 2 (car rows))))
305 (unless (find col results :test #'string-equal)
306 (push col results)))))
308 (defmethod database-list-attributes ((table string) (database mysql-database)
310 (declare (ignore owner))
313 (format nil "SHOW COLUMNS FROM ~A" table)
316 (defmethod database-attribute-type (attribute (table string)
317 (database mysql-database)
319 (declare (ignore owner))
320 (let ((row (car (database-query
322 "SHOW COLUMNS FROM ~A LIKE '~A'" table attribute)
324 (let* ((raw-type (second row))
326 (start-length (position #\( raw-type))
327 (type (if start-length
328 (subseq raw-type 0 start-length)
330 (length (when start-length
331 (parse-integer (subseq raw-type (1+ start-length))
334 (values (ensure-keyword type) length nil (if (string-equal null "YES") 1 0))))))
336 ;;; Sequence functions
338 (defun %sequence-name-to-table (sequence-name)
339 (concatenate 'string "_CLSQL_SEQ_" (sql-escape sequence-name)))
341 (defun %table-name-to-sequence-name (table-name)
342 (and (>= (length table-name) 11)
343 (string-equal (subseq table-name 0 11) "_CLSQL_SEQ_")
344 (subseq table-name 11)))
346 (defmethod database-create-sequence (sequence-name
347 (database mysql-database))
348 (let ((table-name (%sequence-name-to-table sequence-name)))
349 (database-execute-command
350 (concatenate 'string "CREATE TABLE " table-name
351 " (id int NOT NULL PRIMARY KEY AUTO_INCREMENT)")
353 (database-execute-command
354 (concatenate 'string "INSERT INTO " table-name
358 (defmethod database-drop-sequence (sequence-name
359 (database mysql-database))
360 (database-execute-command
361 (concatenate 'string "DROP TABLE " (%sequence-name-to-table sequence-name))
364 (defmethod database-list-sequences ((database mysql-database)
366 (declare (ignore owner))
367 (mapcan #'(lambda (s)
368 (let ((sn (%table-name-to-sequence-name (car s))))
370 (database-query "SHOW TABLES" database nil nil)))
372 (defmethod database-set-sequence-position (sequence-name
374 (database mysql-database))
375 (database-execute-command
376 (format nil "UPDATE ~A SET id=~A" (%sequence-name-to-table sequence-name)
379 (mysql:mysql-insert-id (clsql-mysql::database-mysql-ptr database)))
381 (defmethod database-sequence-next (sequence-name (database mysql-database))
383 (database-execute-command
384 (concatenate 'string "UPDATE " (%sequence-name-to-table sequence-name)
385 " SET id=LAST_INSERT_ID(id+1)")
387 (mysql:mysql-insert-id (clsql-mysql::database-mysql-ptr database))))
389 (defmethod database-sequence-last (sequence-name (database mysql-database))
390 (declare (ignore sequence-name)))
392 (defmethod database-create (connection-spec (type (eql :mysql)))
393 (destructuring-bind (host name user password) connection-spec
394 (multiple-value-bind (output status)
395 (clsql-sys:command-output "mysqladmin create -u~A -p~A -h~A ~A"
397 (if host host "localhost")
399 (if (or (not (eql 0 status))
400 (and (search "failed" output) (search "error" output)))
401 (error 'sql-database-error
403 (format nil "mysql database creation failed with connection-spec ~A."
407 (defmethod database-destroy (connection-spec (type (eql :mysql)))
408 (destructuring-bind (host name user password) connection-spec
409 (multiple-value-bind (output status)
410 (clsql-sys:command-output "mysqladmin drop -f -u~A -p~A -h~A ~A"
412 (if host host "localhost")
414 (if (or (not (eql 0 status))
415 (and (search "failed" output) (search "error" output)))
416 (error 'sql-database-error
418 (format nil "mysql database deletion failed with connection-spec ~A."
422 (defmethod database-probe (connection-spec (type (eql :mysql)))
423 (when (find (second connection-spec) (database-list connection-spec type)
424 :key #'car :test #'string-equal)
427 (defmethod database-list (connection-spec (type (eql :mysql)))
428 (destructuring-bind (host name user password) connection-spec
429 (declare (ignore name))
430 (let ((database (database-connect (list host "mysql" user password) type)))
433 (setf (slot-value database 'clsql-sys::state) :open)
434 (mapcar #'car (database-query "show databases" database :auto nil)))
436 (database-disconnect database)
437 (setf (slot-value database 'clsql-sys::state) :closed))))))
440 ;;; Prepared statements
442 (defclass mysql-stmt ()
443 ((database :initarg :database :reader database)
444 (stmt :initarg :stmt :accessor stmt)
445 (input-bind :initarg :input-bind :reader input-bind)
446 (output-bind :initarg :output-bind :reader output-bind)
447 (types :initarg :types :reader types)
448 (result-set :initarg :result-set :reader result-set)
449 (num-fields :initarg :num-fields :reader num-fields)
450 (field-names :initarg :field-names :accessor stmt-field-names)
451 (length-ptr :initarg :length-ptr :reader length-ptr)
452 (is-null-ptr :initarg :is-null-ptr :reader is-null-ptr)
453 (result-types :initarg :result-types :reader result-types)))
455 (defun clsql-type->mysql-type (type)
457 ((in type :null) mysql-field-types#null)
458 ((in type :int :integer) mysql-field-types#long)
459 ((in type :short) mysql-field-types#short)
460 ((in type :bigint) mysql-field-types#longlong)
461 ((in type :float :double :number) mysql-field-types#double)
462 ((and (consp type) (in (car type) :char :string :varchar)) mysql-field-types#var-string)
464 (error 'sql-user-error
466 (format nil "Unknown clsql type ~A." type)))))
469 (defmethod database-prepare (sql-stmt types (database mysql-database) result-types field-names)
470 (let* ((mysql-ptr (database-mysql-ptr database))
471 (stmt (mysql-stmt-init mysql-ptr)))
472 (when (uffi:null-pointer-p stmt)
473 (error 'sql-database-error
474 :error-id (mysql-errno mysql-ptr)
475 :message (mysql-error-string mysql-ptr)))
477 (uffi:with-cstring (native-query sql-stmt)
478 (unless (zerop (mysql-stmt-prepare stmt native-query (length sql-stmt)))
479 (error 'sql-database-error
480 :error-id (mysql-errno mysql-ptr)
481 :message (mysql-error-string mysql-ptr))))
483 (unless (= (mysql-stmt-param-count stmt) (length types))
484 (error 'sql-database-error
486 (format nil "Mysql param count (~D) does not match number of types (~D)"
487 (mysql-stmt-param-count stmt) (length types))))
489 (let ((rs (mysql-stmt-result-metadata stmt)))
490 (when (uffi:null-pointer-p rs)
491 (error 'sql-database-error
492 :message "NULL result metadata"))
494 (let* ((field-vec (mysql-fetch-fields rs))
495 (num-fields (mysql-num-fields rs))
496 (input-bind (uffi:allocate-foreign-object mysql-bind (length types)))
497 (output-bind (uffi:allocate-foreign-object mysql-bind num-fields))
498 (length-ptr (uffi:allocate-foreign-object :unsigned-long num-fields))
499 (is-null-ptr (uffi:allocate-foreign-object :byte num-fields))
500 (mysql-types (mapcar 'clsql-type->mysql-type types)))
502 (dotimes (i (length types))
503 (let* ((binding (uffi:deref-array input-bind '(:array mysql-bind) i)))
504 (setf (uffi:get-slot-value binding 'mysql-bind 'buffer-type)
506 (setf (uffi:get-slot-value binding 'mysql-bind 'buffer-length) 0)))
508 (dotimes (i num-fields)
510 (let* ((field (uffi:deref-array field-vec '(:array mysql-field) i))
511 (type (uffi:get-slot-value field 'mysql-field 'type))
512 (binding (uffi:deref-array output-bind '(:array mysql-bind) i)))
513 (setf (uffi:get-slot-value binding 'mysql-bind 'buffer-type) type)
515 (setf (uffi:get-slot-value binding 'mysql-bind 'buffer-length) 0)
516 (setf (uffi:get-slot-value binding 'mysql-bind 'is-null)
517 (+ i (uffi:pointer-address is-null-ptr)))
518 (setf (uffi:get-slot-value binding 'mysql-bind 'length)
519 (+ (* i 8) (uffi:pointer-address length-ptr)))
522 ((#.mysql-field-types#var-string #.mysql-field-types#string
523 #.mysql-field-types#tiny-blob #.mysql-field-types#blob
524 #.mysql-field-types#medium-blob #.mysql-field-types#long-blob)
525 (setf (uffi:get-slot-value binding 'mysql-bind 'buffer-length) 1024)
526 (setf (uffi:get-slot-value binding 'mysql-bind 'buffer)
527 (uffi:allocate-foreign-object :unsigned-char 1024)))
528 (#.mysql-field-types#tiny
529 (setf (uffi:get-slot-value binding 'mysql-bind 'buffer)
530 (uffi:allocate-foreign-object :byte)))
531 (#.mysql-field-types#short
532 (setf (uffi:get-slot-value binding 'mysql-bind 'buffer)
533 (uffi:allocate-foreign-object :short)))
534 (#.mysql-field-types#long
535 (setf (uffi:get-slot-value binding 'mysql-bind 'buffer)
536 ;; segfaults if supply :int on amd64
537 (uffi:allocate-foreign-object :long)))
539 (#.mysql-field-types#longlong
540 (setf (uffi:get-slot-value binding 'mysql-bind 'buffer)
541 (uffi:allocate-foreign-object :long)))
542 (#.mysql-field-types#float
543 (setf (uffi:get-slot-value binding 'mysql-bind 'buffer)
544 (uffi:allocate-foreign-object :float)))
545 (#.mysql-field-types#double
546 (setf (uffi:get-slot-value binding 'mysql-bind 'buffer)
547 (uffi:allocate-foreign-object :double)))
548 ((#.mysql-field-types#time #.mysql-field-types#date
549 #.mysql-field-types#datetime #.mysql-field-types#timestamp)
550 (uffi:allocate-foreign-object 'mysql-time))
552 (error "mysql type ~D not supported." type)))))
554 (unless (zerop (mysql-stmt-bind-result stmt output-bind))
555 (error 'sql-database-error
556 :error-id (mysql-stmt-errno stmt)
557 :message (uffi:convert-from-cstring
558 (mysql-stmt-error stmt))))
560 (make-instance 'mysql-stmt
563 :num-fields num-fields
564 :input-bind input-bind
565 :output-bind output-bind
567 :result-types result-types
568 :length-ptr length-ptr
569 :is-null-ptr is-null-ptr
571 :field-names field-names)))))
574 (defmethod database-bind-parameter ((stmt mysql-stmt) position value)
575 ;; FIXME: will need to allocate bind structure. This should probably be
576 ;; done in C since the API is not mature and may change
577 (let ((binding (uffi:deref-array (input-bind stmt) '(:array mysql-bind) (1- position)))
578 (type (nth (1- position) (types stmt))))
579 (setf (uffi:get-slot-value binding 'mysql-bind 'length) 0)
582 (setf (uffi:deref-array (is-null-ptr stmt) '(:array :byte) (1- position)) 1))
584 (setf (uffi:deref-array (is-null-ptr stmt) '(:array :byte) (1- position)) 0)
586 (#.mysql-field-types#long
587 (setf (uffi:get-slot-value binding 'mysql-bind 'buffer) value))
589 (warn "Unknown input bind type ~D." type))
593 (defmethod database-run-prepared ((stmt mysql-stmt))
595 (unless (zerop (mysql-stmt-bind-param (stmt stmt) (input-bind stmt)))
596 (error 'sql-database-error
597 :error-id (mysql-stmt-errno (stmt stmt))
598 :message (uffi:convert-from-cstring
599 (mysql-stmt-error (stmt stmt)))))
601 (unless (zerop (mysql-stmt-execute (stmt stmt)))
602 (error 'sql-database-error
603 :error-id (mysql-stmt-errno (stmt stmt))
604 :message (uffi:convert-from-cstring
605 (mysql-stmt-error (stmt stmt)))))
607 (unless (zerop (mysql-stmt-store-result (stmt stmt)))
608 (error 'sql-database-error
609 :error-id (mysql-stmt-errno (stmt stmt))
610 :message (uffi:convert-from-cstring
611 (mysql-stmt-error (stmt stmt)))))
612 (database-fetch-prepared-rows stmt))
615 (defun database-fetch-prepared-rows (stmt)
616 (do ((rc (mysql-stmt-fetch (stmt stmt)) (mysql-stmt-fetch (stmt stmt)))
617 (num-fields (num-fields stmt))
619 ((not (zerop rc)) (nreverse rows))
621 (loop for i from 0 below num-fields
624 (not (zerop (uffi:ensure-char-integer
625 (uffi:deref-array (is-null-ptr stmt) '(:array :byte) i))))))
627 (let* ((bind (uffi:deref-array (output-bind stmt) '(:array mysql-bind) i))
628 (type (uffi:get-slot-value bind 'mysql-bind 'buffer-type))
629 (buffer (uffi:get-slot-value bind 'mysql-bind 'buffer)))
631 ((#.mysql-field-types#var-string #.mysql-field-types#string
632 #.mysql-field-types#tiny-blob #.mysql-field-types#blob
633 #.mysql-field-types#medium-blob #.mysql-field-types#long-blob)
634 (uffi:convert-from-foreign-string buffer))
635 (#.mysql-field-types#tiny
636 (uffi:ensure-char-integer
637 (uffi:deref-pointer buffer :byte)))
638 (#.mysql-field-types#short
639 (uffi:deref-pointer buffer :short))
640 (#.mysql-field-types#long
641 (uffi:deref-pointer buffer :int))
643 (#.mysql-field-types#longlong
644 (uffi:deref-pointer buffer :long))
645 (#.mysql-field-types#float
646 (uffi:deref-pointer buffer :float))
647 (#.mysql-field-types#double
648 (uffi:deref-pointer buffer :double))
649 ((#.mysql-field-types#time #.mysql-field-types#date
650 #.mysql-field-types#datetime #.mysql-field-types#timestamp)
651 (let ((year (uffi:get-slot-value buffer 'mysql-time 'mysql::year))
652 (month (uffi:get-slot-value buffer 'mysql-time 'mysql::month))
653 (day (uffi:get-slot-value buffer 'mysql-time 'mysql::day))
654 (hour (uffi:get-slot-value buffer 'mysql-time 'mysql::hour))
655 (minute (uffi:get-slot-value buffer 'mysql-time 'mysql::minute))
656 (second (uffi:get-slot-value buffer 'mysql-time 'mysql::second)))
658 (make-time :year year :month month :day day :hour hour
659 :minute minute :second second))))
668 (defmethod database-free-prepared ((stmt mysql-stmt))
669 (with-slots (stmt) stmt
670 (mysql-stmt-close stmt))
674 ;;; Database capabilities
676 (defmethod db-type-use-column-on-drop-index? ((db-type (eql :mysql)))
679 (defmethod db-type-has-views? ((db-type (eql :mysql)))
680 #+mysql-client-v5.1 t
681 #-mysql-client-v5.1 nil)
683 (defmethod db-type-has-subqueries? ((db-type (eql :mysql)))
684 #+mysql-client-v4.1 t
685 #-mysql-client-v4.1 nil)
687 (defmethod db-type-has-boolean-where? ((db-type (eql :mysql)))
690 (defmethod db-type-has-union? ((db-type (eql :mysql)))
691 (not (eql (schar mysql::*mysql-client-info* 0) #\3)))
693 (defmethod db-type-transaction-capable? ((db-type (eql :mysql)) database)
694 (let ((tuple (car (database-query "SHOW VARIABLES LIKE 'HAVE_INNODB'" database :auto nil))))
695 (and tuple (string-equal "YES" (second tuple)))))
697 (defmethod db-type-has-prepared-stmt? ((db-type (eql :mysql)))
698 #+mysql-client-v4.1 t
699 #-mysql-client-v4.1 nil)
701 (when (clsql-sys:database-type-library-loaded :mysql)
702 (clsql-sys:initialize-database-type :database-type :mysql))