db-mysql/mysql-sql.lisp

   1 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
   2 ;;;; *************************************************************************
   3 ;;;; FILE IDENTIFICATION
   4 ;;;;
   5 ;;;; Name:          mysql-sql.lisp
   6 ;;;; Purpose:       High-level MySQL interface using UFFI
   7 ;;;; Date Started:  Feb 2002
   8 ;;;;
   9 ;;;; $Id$
  10 ;;;;
  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 ;;;; *************************************************************************
  15
  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."))
  20
  21 (in-package #:clsql-mysql)
  22
  23 ;; if we have :sb-unicode, UFFI will treat :cstring as a UTF-8 string
  24 (defun expression-length (query-expression)
  25   (length #+sb-unicode (sb-ext:string-to-octets query-expression
  26                                                 :external-format :utf8)
  27           #-sb-unicode query-expression))
  28
  29 ;;; Field conversion functions
  30
  31 (defun result-field-names (num-fields res-ptr)
  32   (declare (fixnum num-fields))
  33   (let ((names '())
  34         (field-vec (mysql-fetch-fields res-ptr)))
  35     (dotimes (i num-fields)
  36       (declare (fixnum i))
  37       (let* ((field (uffi:deref-array field-vec '(:array mysql-field) i))
  38              (name (uffi:convert-from-foreign-string
  39                     (uffi:get-slot-value field 'mysql-field 'mysql::name))))
  40         (push name names)))
  41     (nreverse names)))
  42
  43 (defun make-type-list-for-auto (num-fields res-ptr)
  44   (declare (fixnum num-fields))
  45   (let ((new-types '())
  46         (field-vec (mysql-fetch-fields res-ptr)))
  47     (dotimes (i num-fields)
  48       (declare (fixnum i))
  49       (let* ((field (uffi:deref-array field-vec '(:array mysql-field) i))
  50              (flags (uffi:get-slot-value field 'mysql-field 'mysql::flags))
  51              (unsigned (plusp (logand flags 32)))
  52              (type (uffi:get-slot-value field 'mysql-field 'type)))
  53         (push
  54          (case type
  55            ((#.mysql-field-types#tiny
  56              #.mysql-field-types#short
  57              #.mysql-field-types#int24)
  58             (if unsigned
  59                 :uint32
  60               :int32))
  61            (#.mysql-field-types#long
  62             (if unsigned
  63                 :uint
  64               :int))
  65             (#.mysql-field-types#longlong
  66              (if unsigned
  67                  :uint64
  68                :int64))
  69            ((#.mysql-field-types#double
  70              #.mysql-field-types#float
  71              #.mysql-field-types#decimal)
  72             :double)
  73            (otherwise
  74             t))
  75          new-types)))
  76     (nreverse new-types)))
  77
  78 (defun canonicalize-types (types num-fields res-ptr)
  79   (when types
  80     (let ((auto-list (make-type-list-for-auto num-fields res-ptr)))
  81       (cond
  82         ((listp types)
  83          (canonicalize-type-list types auto-list))
  84         ((eq types :auto)
  85          auto-list)
  86         (t
  87          nil)))))
  88
  89 (defmethod database-initialize-database-type ((database-type (eql :mysql)))
  90   t)
  91
  92 (uffi:def-type mysql-mysql-ptr-def (* mysql-mysql))
  93 (uffi:def-type mysql-row-def mysql-row)
  94 (uffi:def-type mysql-mysql-res-ptr-def (* mysql-mysql-res))
  95
  96 (defclass mysql-database (database)
  97   ((mysql-ptr :accessor database-mysql-ptr :initarg :mysql-ptr
  98               :type mysql-mysql-ptr-def)))
  99
 100 (defmethod database-type ((database mysql-database))
 101   :mysql)
 102
 103 (defmethod database-name-from-spec (connection-spec (database-type (eql :mysql)))
 104   (check-connection-spec connection-spec database-type
 105                          (host db user password &optional port))
 106   (destructuring-bind (host db user password &optional port) connection-spec
 107     (declare (ignore password))
 108     (concatenate 'string
 109                  (etypecase host
 110                    (null "localhost")
 111                    (pathname (namestring host))
 112                    (string host))
 113                  (if port
 114                      (concatenate 'string
 115                                   ":"
 116                                   (etypecase port
 117                                     (integer (write-to-string port))
 118                                     (string port)))
 119                      "")
 120                  "/" db "/" user)))
 121
 122 (defmethod database-connect (connection-spec (database-type (eql :mysql)))
 123   (check-connection-spec connection-spec database-type
 124                          (host db user password &optional port))
 125   (destructuring-bind (host db user password &optional port) connection-spec
 126     (let ((mysql-ptr (mysql-init (uffi:make-null-pointer 'mysql-mysql)))
 127           (socket nil))
 128       (if (uffi:null-pointer-p mysql-ptr)
 129           (error 'sql-connection-error
 130                  :database-type database-type
 131                  :connection-spec connection-spec
 132                  :error-id (mysql-errno mysql-ptr)
 133                  :message (mysql-error-string mysql-ptr))
 134         (uffi:with-cstrings ((host-native host)
 135                             (user-native user)
 136                             (password-native password)
 137                             (db-native db)
 138                             (socket-native socket))
 139           (let ((error-occurred nil))
 140             (unwind-protect
 141                 (if (uffi:null-pointer-p
 142                      (mysql-real-connect
 143                       mysql-ptr host-native user-native password-native
 144                       db-native
 145                       (etypecase port
 146                         (null 0)
 147                         (integer port)
 148                         (string (parse-integer port)))
 149                       socket-native 0))
 150                     (progn
 151                       (setq error-occurred t)
 152                       (error 'sql-connection-error
 153                              :database-type database-type
 154                              :connection-spec connection-spec
 155                              :error-id (mysql-errno mysql-ptr)
 156                              :message (mysql-error-string mysql-ptr)))
 157                   (make-instance 'mysql-database
 158                     :name (database-name-from-spec connection-spec
 159                                                    database-type)
 160                     :database-type :mysql
 161                     :connection-spec connection-spec
 162                     :mysql-ptr mysql-ptr))
 163               (when error-occurred (mysql-close mysql-ptr)))))))))
 164
 165
 166 (defmethod database-disconnect ((database mysql-database))
 167   (mysql-close (database-mysql-ptr database))
 168   (setf (database-mysql-ptr database) nil)
 169   t)
 170
 171
 172 (defmethod database-query (query-expression (database mysql-database)
 173                            result-types field-names)
 174   (declare (optimize (speed 3) (safety 0) (debug 0) (space 0)))
 175   (let ((mysql-ptr (database-mysql-ptr database)))
 176     (uffi:with-cstring (query-native query-expression)
 177       (if (zerop (mysql-real-query mysql-ptr query-native
 178                                    (expression-length query-expression)))
 179           (let ((res-ptr (mysql-use-result mysql-ptr)))
 180             (if res-ptr
 181                 (unwind-protect
 182                      (let ((num-fields (mysql-num-fields res-ptr)))
 183                        (declare (fixnum num-fields))
 184                        (setq result-types (canonicalize-types
 185                                     result-types num-fields
 186                                     res-ptr))
 187                        (values
 188                         (loop for row = (mysql-fetch-row res-ptr)
 189                               for lengths = (mysql-fetch-lengths res-ptr)
 190                               until (uffi:null-pointer-p row)
 191                               collect
 192                               (do* ((rlist (make-list num-fields))
 193                                     (i 0 (1+ i))
 194                                     (pos rlist (cdr pos)))
 195                                    ((= i num-fields) rlist)
 196                                 (declare (fixnum i))
 197                                 (setf (car pos)
 198                                       (convert-raw-field
 199                                        (uffi:deref-array row '(:array
 200                                                                (* :unsigned-char))
 201                                                          i)
 202                                        result-types i
 203                                        (uffi:deref-array lengths '(:array :unsigned-long)
 204                                                          i)))))
 205                         (when field-names
 206                           (result-field-names num-fields res-ptr))))
 207                   (mysql-free-result res-ptr))
 208                 (error 'sql-database-data-error
 209                        :database database
 210                        :expression query-expression
 211                        :error-id (mysql-errno mysql-ptr)
 212                        :message (mysql-error-string mysql-ptr))))
 213           (error 'sql-database-data-error
 214                  :database database
 215                  :expression query-expression
 216                  :error-id (mysql-errno mysql-ptr)
 217                  :message (mysql-error-string mysql-ptr))))))
 218
 219 (defmethod database-execute-command (sql-expression (database mysql-database))
 220   (uffi:with-cstring (sql-native sql-expression)
 221     (let ((mysql-ptr (database-mysql-ptr database)))
 222       (declare (type mysql-mysql-ptr-def mysql-ptr))
 223       (if (zerop (mysql-real-query mysql-ptr sql-native
 224                                    (expression-length sql-expression)))
 225           t
 226         (error 'sql-database-data-error
 227                :database database
 228                :expression sql-expression
 229                :error-id (mysql-errno mysql-ptr)
 230                :message (mysql-error-string mysql-ptr))))))
 231
 232
 233 (defstruct mysql-result-set
 234   (res-ptr (uffi:make-null-pointer 'mysql-mysql-res) :type mysql-mysql-res-ptr-def)
 235   (types nil :type list)
 236   (num-fields 0 :type fixnum)
 237   (full-set nil :type boolean))
 238
 239
 240 (defmethod database-query-result-set ((query-expression string)
 241                                       (database mysql-database)
 242                                       &key full-set result-types)
 243   (uffi:with-cstring (query-native query-expression)
 244     (let ((mysql-ptr (database-mysql-ptr database)))
 245      (declare (type mysql-mysql-ptr-def mysql-ptr))
 246       (if (zerop (mysql-real-query mysql-ptr query-native
 247                                    (expression-length query-expression)))
 248           (let ((res-ptr (if full-set
 249                              (mysql-store-result mysql-ptr)
 250                            (mysql-use-result mysql-ptr))))
 251             (declare (type mysql-mysql-res-ptr-def res-ptr))
 252             (if (not (uffi:null-pointer-p res-ptr))
 253                 (let* ((num-fields (mysql-num-fields res-ptr))
 254                        (result-set (make-mysql-result-set
 255                                     :res-ptr res-ptr
 256                                     :num-fields num-fields
 257                                     :full-set full-set
 258                                     :types
 259                                     (canonicalize-types
 260                                      result-types num-fields
 261                                      res-ptr))))
 262                   (if full-set
 263                       (values result-set
 264                               num-fields
 265                               (mysql-num-rows res-ptr))
 266                       (values result-set
 267                               num-fields)))
 268                 (error 'sql-database-data-error
 269                      :database database
 270                      :expression query-expression
 271                      :error-id (mysql-errno mysql-ptr)
 272                      :message (mysql-error-string mysql-ptr))))
 273         (error 'sql-database-data-error
 274                :database database
 275                :expression query-expression
 276                :error-id (mysql-errno mysql-ptr)
 277                :message (mysql-error-string mysql-ptr))))))
 278
 279 (defmethod database-dump-result-set (result-set (database mysql-database))
 280   (mysql-free-result (mysql-result-set-res-ptr result-set))
 281   t)
 282
 283
 284 (defmethod database-store-next-row (result-set (database mysql-database) list)
 285   (let* ((res-ptr (mysql-result-set-res-ptr result-set))
 286          (row (mysql-fetch-row res-ptr))
 287          (lengths (mysql-fetch-lengths res-ptr))
 288          (types (mysql-result-set-types result-set)))
 289     (declare (type mysql-mysql-res-ptr-def res-ptr)
 290              (type mysql-row-def row))
 291     (unless (uffi:null-pointer-p row)
 292       (loop for i from 0 below (mysql-result-set-num-fields result-set)
 293             for rest on list
 294             do
 295             (setf (car rest)
 296                   (convert-raw-field
 297                    (uffi:deref-array row '(:array (* :unsigned-char)) i)
 298                    types
 299                    i
 300                    (uffi:deref-array lengths '(:array :unsigned-long) i))))
 301       list)))
 302
 303
 304 ;; Table and attribute introspection
 305
 306 (defmethod database-list-tables ((database mysql-database) &key (owner nil))
 307   (declare (ignore owner))
 308   (remove-if #'(lambda (s)
 309                  (and (>= (length s) 11)
 310                       (string-equal (subseq s 0 11) "_CLSQL_SEQ_")))
 311              (mapcar #'car (database-query "SHOW TABLES" database nil nil))))
 312
 313 ;; MySQL 4.1 does not support views
 314 (defmethod database-list-views ((database mysql-database)
 315                                 &key (owner nil))
 316   (declare (ignore owner))
 317   nil)
 318
 319 (defmethod database-list-indexes ((database mysql-database)
 320                                   &key (owner nil))
 321   (let ((result '()))
 322     (dolist (table (database-list-tables database :owner owner) result)
 323       (setq result
 324         (append (database-list-table-indexes table database :owner owner)
 325                 result)))))
 326
 327 (defmethod database-list-table-indexes (table (database mysql-database)
 328                                         &key (owner nil))
 329   (declare (ignore owner))
 330   (do ((results nil)
 331        (rows (database-query
 332               (format nil "SHOW INDEX FROM ~A" (string-upcase table))
 333               database nil nil)
 334              (cdr rows)))
 335       ((null rows) (nreverse results))
 336     (let ((col (nth 2 (car rows))))
 337       (unless (find col results :test #'string-equal)
 338         (push col results)))))
 339
 340 (defmethod database-list-attributes ((table string) (database mysql-database)
 341                                      &key (owner nil))
 342   (declare (ignore owner))
 343   (mapcar #'car
 344           (database-query
 345            (format nil "SHOW COLUMNS FROM ~A" table)
 346            database nil nil)))
 347
 348 (defmethod database-attribute-type (attribute (table string)
 349                                     (database mysql-database)
 350                                     &key (owner nil))
 351   (declare (ignore owner))
 352   (let ((row (car (database-query
 353                    (format nil
 354                            "SHOW COLUMNS FROM ~A LIKE '~A'" table attribute)
 355                    database nil nil))))
 356     (let* ((raw-type (second row))
 357            (null (third row))
 358            (start-length (position #\( raw-type))
 359            (type (if start-length
 360                      (subseq raw-type 0 start-length)
 361                      raw-type))
 362            (length (when start-length
 363                      (parse-integer (subseq raw-type (1+ start-length))
 364                                     :junk-allowed t))))
 365       (when type
 366         (values (ensure-keyword type) length nil (if (string-equal null "YES") 1 0))))))
 367
 368 ;;; Sequence functions
 369
 370 (defun %sequence-name-to-table (sequence-name)
 371   (concatenate 'string "_CLSQL_SEQ_" (sql-escape sequence-name)))
 372
 373 (defun %table-name-to-sequence-name (table-name)
 374   (and (>= (length table-name) 11)
 375        (string-equal (subseq table-name 0 11) "_CLSQL_SEQ_")
 376        (subseq table-name 11)))
 377
 378 (defmethod database-create-sequence (sequence-name
 379                                      (database mysql-database))
 380   (let ((table-name (%sequence-name-to-table sequence-name)))
 381     (database-execute-command
 382      (concatenate 'string "CREATE TABLE " table-name
 383                   " (id int NOT NULL PRIMARY KEY AUTO_INCREMENT)")
 384      database)
 385     (database-execute-command
 386      (concatenate 'string "INSERT INTO " table-name
 387                   " VALUES (-1)")
 388      database)))
 389
 390 (defmethod database-drop-sequence (sequence-name
 391                                    (database mysql-database))
 392   (database-execute-command
 393    (concatenate 'string "DROP TABLE " (%sequence-name-to-table sequence-name))
 394    database))
 395
 396 (defmethod database-list-sequences ((database mysql-database)
 397                                     &key (owner nil))
 398   (declare (ignore owner))
 399   (mapcan #'(lambda (s)
 400               (let ((sn (%table-name-to-sequence-name (car s))))
 401                 (and sn (list sn))))
 402           (database-query "SHOW TABLES" database nil nil)))
 403
 404 (defmethod database-set-sequence-position (sequence-name
 405                                            (position integer)
 406                                            (database mysql-database))
 407   (database-execute-command
 408    (format nil "UPDATE ~A SET id=~A" (%sequence-name-to-table sequence-name)
 409            position)
 410    database)
 411   (mysql:mysql-insert-id (clsql-mysql::database-mysql-ptr database)))
 412
 413 (defmethod database-sequence-next (sequence-name (database mysql-database))
 414   (without-interrupts
 415    (database-execute-command
 416     (concatenate 'string "UPDATE " (%sequence-name-to-table sequence-name)
 417                  " SET id=LAST_INSERT_ID(id+1)")
 418     database)
 419    (mysql:mysql-insert-id (clsql-mysql::database-mysql-ptr database))))
 420
 421 (defmethod database-sequence-last (sequence-name (database mysql-database))
 422   (without-interrupts
 423     (caar (database-query
 424            (concatenate 'string "SELECT id from "
 425                         (%sequence-name-to-table sequence-name))
 426            database :auto nil))))
 427
 428 (defmethod database-create (connection-spec (type (eql :mysql)))
 429   (destructuring-bind (host name user password &optional port) connection-spec
 430     (multiple-value-bind (output status)
 431         (clsql-sys:command-output "mysqladmin create -u~A -p~A -h~A~@[ -P~A~] ~A"
 432                                        user password
 433                                        (if host host "localhost")
 434                                        port name
 435                                        name)
 436       (if (or (not (eql 0 status))
 437               (and (search "failed" output) (search "error" output)))
 438           (error 'sql-database-error
 439                  :message
 440                  (format nil "mysql database creation failed with connection-spec ~A."
 441                          connection-spec))
 442         t))))
 443
 444 (defmethod database-destroy (connection-spec (type (eql :mysql)))
 445   (destructuring-bind (host name user password &optional port) connection-spec
 446     (multiple-value-bind (output status)
 447         (clsql-sys:command-output "mysqladmin drop -f -u~A -p~A -h~A~@[ -P~A~] ~A"
 448                                        user password
 449                                        (if host host "localhost")
 450                                        port name)
 451       (if (or (not (eql 0 status))
 452               (and (search "failed" output) (search "error" output)))
 453           (error 'sql-database-error
 454                  :message
 455                  (format nil "mysql database deletion failed with connection-spec ~A."
 456                          connection-spec))
 457         t))))
 458
 459 (defmethod database-probe (connection-spec (type (eql :mysql)))
 460   (when (find (second connection-spec) (database-list connection-spec type)
 461               :key #'car :test #'string-equal)
 462     t))
 463
 464 (defmethod database-list (connection-spec (type (eql :mysql)))
 465   (destructuring-bind (host name user password &optional port) connection-spec
 466     (declare (ignore name))
 467     (let ((database (database-connect (list host "mysql" user password port) type)))
 468       (unwind-protect
 469            (progn
 470              (setf (slot-value database 'clsql-sys::state) :open)
 471              (mapcar #'car (database-query "show databases" database :auto nil)))
 472         (progn
 473           (database-disconnect database)
 474           (setf (slot-value database 'clsql-sys::state) :closed))))))
 475
 476
 477 ;;; Prepared statements
 478
 479 (defclass mysql-stmt ()
 480   ((database :initarg :database :reader database)
 481    (stmt :initarg :stmt :accessor stmt)
 482    (input-bind :initarg :input-bind :reader input-bind)
 483    (output-bind :initarg :output-bind :reader output-bind)
 484    (types :initarg :types :reader types)
 485    (result-set :initarg :result-set :reader result-set)
 486    (num-fields :initarg :num-fields :reader num-fields)
 487    (field-names :initarg :field-names :accessor stmt-field-names)
 488    (length-ptr :initarg :length-ptr :reader length-ptr)
 489    (is-null-ptr :initarg :is-null-ptr :reader is-null-ptr)
 490    (result-types :initarg :result-types :reader result-types)))
 491
 492 (defun clsql-type->mysql-type (type)
 493   (cond
 494     ((in type :null) mysql-field-types#null)
 495     ((in type :int :integer) mysql-field-types#long)
 496     ((in type :short) mysql-field-types#short)
 497     ((in type :bigint) mysql-field-types#longlong)
 498     ((in type :float :double :number) mysql-field-types#double)
 499     ((and (consp type) (in (car type) :char :string :varchar)) mysql-field-types#var-string)
 500     ((or (eq type :blob) (and (consp type) (in (car type) :blob))) mysql-field-types#var-string)
 501     (t
 502        (error 'sql-user-error
 503               :message
 504               (format nil "Unknown clsql type ~A." type)))))
 505
 506 #+mysql-client-v4.1
 507 (defmethod database-prepare (sql-stmt types (database mysql-database) result-types field-names)
 508   (let* ((mysql-ptr (database-mysql-ptr database))
 509          (stmt (mysql-stmt-init mysql-ptr)))
 510     (when (uffi:null-pointer-p stmt)
 511       (error 'sql-database-error
 512              :error-id (mysql-errno mysql-ptr)
 513              :message (mysql-error-string mysql-ptr)))
 514
 515     (uffi:with-cstring (native-query sql-stmt)
 516       (unless (zerop (mysql-stmt-prepare stmt native-query (expression-length sql-stmt)))
 517         (mysql-stmt-close stmt)
 518         (error 'sql-database-error
 519                :error-id (mysql-errno mysql-ptr)
 520                :message (mysql-error-string mysql-ptr))))
 521
 522     (unless (= (mysql-stmt-param-count stmt) (length types))
 523       (mysql-stmt-close stmt)
 524       (error 'sql-database-error
 525              :message
 526              (format nil "Mysql param count (~D) does not match number of types (~D)"
 527                      (mysql-stmt-param-count stmt) (length types))))
 528
 529     (let ((rs (mysql-stmt-result-metadata stmt)))
 530       (when (uffi:null-pointer-p rs)
 531         (warn "mysql_stmt_result_metadata returned NULL")
 532         #+nil
 533         (mysql-stmt-close stmt)
 534         #+nil
 535         (error 'sql-database-error
 536                :message "mysql_stmt_result_metadata returned NULL"))
 537
 538       (let ((input-bind (uffi:allocate-foreign-object 'mysql-bind (length types)))
 539             (mysql-types (mapcar 'clsql-type->mysql-type types))
 540             field-vec num-fields is-null-ptr output-bind length-ptr)
 541
 542         (print 'a)
 543         (dotimes (i (length types))
 544           (let* ((binding (uffi:deref-array input-bind '(:array mysql-bind) i)))
 545             (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer-type)
 546               (nth i mysql-types))
 547             (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer-length) 0)))
 548
 549         (print 'b)
 550         (unless (uffi:null-pointer-p rs)
 551           (setq field-vec (mysql-fetch-fields rs)
 552                 num-fields (mysql-num-fields rs)
 553                 is-null-ptr (uffi:allocate-foreign-object :byte num-fields)
 554                 output-bind (uffi:allocate-foreign-object 'mysql-bind num-fields)
 555                 length-ptr (uffi:allocate-foreign-object :unsigned-long num-fields))
 556           (dotimes (i num-fields)
 557             (declare (fixnum i))
 558             (let* ((field (uffi:deref-array field-vec '(:array mysql-field) i))
 559                    (type (uffi:get-slot-value field 'mysql-field 'type))
 560                    (binding (uffi:deref-array output-bind '(:array mysql-bind) i)))
 561               (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer-type) type)
 562
 563               (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer-length) 0)
 564               #+need-to-allocate-foreign-object-for-this
 565               (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::is-null)
 566                 (+ i (uffi:pointer-address is-null-ptr)))
 567               #+need-to-allocate-foreign-object-for-this
 568               (setf (uffi:get-slot-value binding 'mysql-bind 'length)
 569                 (+ (* i 8) (uffi:pointer-address length-ptr)))
 570
 571               (case type
 572                 ((#.mysql-field-types#var-string #.mysql-field-types#string
 573                   #.mysql-field-types#tiny-blob #.mysql-field-types#blob
 574                   #.mysql-field-types#medium-blob #.mysql-field-types#long-blob)
 575                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer-length) 1024)
 576                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 577                    (uffi:allocate-foreign-object :unsigned-char 1024)))
 578                 (#.mysql-field-types#tiny
 579                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 580                    (uffi:allocate-foreign-object :byte)))
 581                 (#.mysql-field-types#short
 582                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 583                    (uffi:allocate-foreign-object :short)))
 584                 (#.mysql-field-types#long
 585                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 586                    ;; segfaults if supply :int on amd64
 587                    (uffi:allocate-foreign-object :long)))
 588                 #+64bit
 589                 (#.mysql-field-types#longlong
 590                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 591                    (uffi:allocate-foreign-object :long)))
 592                 (#.mysql-field-types#float
 593                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 594                    (uffi:allocate-foreign-object :float)))
 595                 (#.mysql-field-types#double
 596                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 597                    (uffi:allocate-foreign-object :double)))
 598                 ((#.mysql-field-types#time #.mysql-field-types#date
 599                   #.mysql-field-types#datetime #.mysql-field-types#timestamp)
 600                  (uffi:allocate-foreign-object 'mysql-time))
 601                 (t
 602                  (error "mysql type ~D not supported." type)))))
 603
 604           (unless (zerop (mysql-stmt-bind-result stmt output-bind))
 605             (mysql-stmt-close stmt)
 606             (error 'sql-database-error
 607                    :error-id (mysql-stmt-errno stmt)
 608                    :message  (uffi:convert-from-cstring
 609                               (mysql-stmt-error stmt)))))
 610
 611         (make-instance 'mysql-stmt
 612           :database database
 613           :stmt stmt
 614           :num-fields num-fields
 615           :input-bind input-bind
 616           :output-bind output-bind
 617           :result-set rs
 618           :result-types result-types
 619           :length-ptr length-ptr
 620           :is-null-ptr is-null-ptr
 621           :types mysql-types
 622           :field-names field-names)))))
 623
 624 #+mysql-client-v4.1
 625 (defmethod database-bind-parameter ((stmt mysql-stmt) position value)
 626   ;; FIXME: will need to allocate bind structure. This should probably be
 627   ;; done in C since the API is not mature and may change
 628   (let ((binding (uffi:deref-array (input-bind stmt) '(:array mysql-bind) (1- position)))
 629         (type (nth (1- position) (types stmt))))
 630     (setf (uffi:get-slot-value binding 'mysql-bind 'length) 0)
 631     (cond
 632      ((null value)
 633       (when (is-null-ptr stmt)
 634         (setf (uffi:deref-array (is-null-ptr stmt) '(:array :byte) (1- position)) 1)))
 635      (t
 636       (when (is-null-ptr stmt)
 637         (setf (uffi:deref-array (is-null-ptr stmt) '(:array :byte) (1- position)) 0))
 638       (case type
 639         (#.mysql-field-types#long
 640          (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer) value))
 641         (t
 642          (warn "Unknown input bind type ~D." type))
 643         )))))
 644
 645 #+mysql-client-v4.1
 646 (defmethod database-run-prepared ((stmt mysql-stmt))
 647   (print 'a1)
 648   (when (input-bind stmt)
 649     (unless (zerop (mysql-stmt-bind-param (stmt stmt) (input-bind stmt)))
 650       (error 'sql-database-error
 651              :error-id (mysql-stmt-errno (stmt stmt))
 652              :message  (uffi:convert-from-cstring
 653                         (mysql-stmt-error (stmt stmt))))))
 654   (print 'a2)
 655   (unless (zerop (mysql-stmt-execute (stmt stmt)))
 656     (error 'sql-database-error
 657            :error-id (mysql-stmt-errno (stmt stmt))
 658            :message  (uffi:convert-from-cstring
 659                       (mysql-stmt-error (stmt stmt)))))
 660   (print 'a3)
 661   (unless (zerop (mysql-stmt-store-result (stmt stmt)))
 662     (error 'sql-database-error
 663            :error-id (mysql-stmt-errno (stmt stmt))
 664            :message  (uffi:convert-from-cstring
 665                       (mysql-stmt-error (stmt stmt)))))
 666   (database-fetch-prepared-rows stmt))
 667
 668 #+mysql-client-v4.1
 669 (defun database-fetch-prepared-rows (stmt)
 670   (do ((rc (mysql-stmt-fetch (stmt stmt)) (mysql-stmt-fetch (stmt stmt)))
 671        (num-fields (num-fields stmt))
 672        (rows '()))
 673       ((not (zerop rc)) (nreverse rows))
 674     (push
 675      (loop for i from 0 below num-fields
 676            collect
 677            (let ((is-null
 678                   (not (zerop (uffi:ensure-char-integer
 679                                (uffi:deref-array (is-null-ptr stmt) '(:array :byte) i))))))
 680              (unless is-null
 681                (let* ((bind (uffi:deref-array (output-bind stmt) '(:array mysql-bind) i))
 682                       (type (uffi:get-slot-value bind 'mysql-bind 'mysql::buffer-type))
 683                       (buffer (uffi:get-slot-value bind 'mysql-bind 'mysql::buffer)))
 684                  (case type
 685                    ((#.mysql-field-types#var-string #.mysql-field-types#string
 686                      #.mysql-field-types#tiny-blob #.mysql-field-types#blob
 687                      #.mysql-field-types#medium-blob #.mysql-field-types#long-blob)
 688                     (uffi:convert-from-foreign-string buffer))
 689                     (#.mysql-field-types#tiny
 690                      (uffi:ensure-char-integer
 691                       (uffi:deref-pointer buffer :byte)))
 692                     (#.mysql-field-types#short
 693                      (uffi:deref-pointer buffer :short))
 694                     (#.mysql-field-types#long
 695                      (uffi:deref-pointer buffer :int))
 696                     #+64bit
 697                     (#.mysql-field-types#longlong
 698                      (uffi:deref-pointer buffer :long))
 699                     (#.mysql-field-types#float
 700                      (uffi:deref-pointer buffer :float))
 701                     (#.mysql-field-types#double
 702                      (uffi:deref-pointer buffer :double))
 703                    ((#.mysql-field-types#time #.mysql-field-types#date
 704                                               #.mysql-field-types#datetime #.mysql-field-types#timestamp)
 705                     (let ((year (uffi:get-slot-value buffer 'mysql-time 'mysql::year))
 706                           (month (uffi:get-slot-value buffer 'mysql-time 'mysql::month))
 707                           (day (uffi:get-slot-value buffer 'mysql-time 'mysql::day))
 708                           (hour (uffi:get-slot-value buffer 'mysql-time 'mysql::hour))
 709                           (minute (uffi:get-slot-value buffer 'mysql-time 'mysql::minute))
 710                   (second (uffi:get-slot-value buffer 'mysql-time 'mysql::second)))
 711                       (db-timestring
 712                        (make-time :year year :month month :day day :hour hour
 713                                   :minute minute :second second))))
 714                    (t
 715                     (list type)))))))
 716      rows)))
 717
 718
 719
 720
 721 #+mysql-client-v4.1
 722 (defmethod database-free-prepared ((stmt mysql-stmt))
 723   (with-slots (stmt) stmt
 724     (mysql-stmt-close stmt))
 725   )
 726
 727
 728 ;;; Database capabilities
 729
 730 (defmethod db-type-use-column-on-drop-index? ((db-type (eql :mysql)))
 731   t)
 732
 733 (defmethod db-type-has-views? ((db-type (eql :mysql)))
 734   #+mysql-client-v5.1 t
 735   #-mysql-client-v5.1 nil)
 736
 737 (defmethod db-type-has-subqueries? ((db-type (eql :mysql)))
 738   #+mysql-client-v4.1 t
 739   #-mysql-client-v4.1 nil)
 740
 741 (defmethod db-type-has-boolean-where? ((db-type (eql :mysql)))
 742   #+mysql-client-v4.1 t
 743   #-mysql-client-v4.1 nil)
 744
 745 (defmethod db-type-has-union? ((db-type (eql :mysql)))
 746   (not (eql (schar mysql::*mysql-client-info* 0) #\3)))
 747
 748 (defmethod db-type-transaction-capable? ((db-type (eql :mysql)) database)
 749   (let ((tuple (car (database-query "SHOW VARIABLES LIKE 'HAVE_INNODB'" database :auto nil))))
 750     (and tuple (string-equal "YES" (second tuple)))))
 751
 752 (defmethod db-type-has-prepared-stmt? ((db-type (eql :mysql)))
 753   #+mysql-client-v4.1 t
 754   #-mysql-client-v4.1 nil)
 755
 756 (when (clsql-sys:database-type-library-loaded :mysql)
 757   (clsql-sys:initialize-database-type :database-type :mysql))
 758