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    (server-info :accessor database-server-info :initarg :server-info
 100               :type string)))
 101
 102 (defmethod database-type ((database mysql-database))
 103   :mysql)
 104
 105 (defmethod database-name-from-spec (connection-spec (database-type (eql :mysql)))
 106   (check-connection-spec connection-spec database-type
 107                          (host db user password &optional port))
 108   (destructuring-bind (host db user password &optional port) connection-spec
 109     (declare (ignore password))
 110     (concatenate 'string
 111                  (etypecase host
 112                    (null "localhost")
 113                    (pathname (namestring host))
 114                    (string host))
 115                  (if port
 116                      (concatenate 'string
 117                                   ":"
 118                                   (etypecase port
 119                                     (integer (write-to-string port))
 120                                     (string port)))
 121                      "")
 122                  "/" db "/" user)))
 123
 124 (defmethod database-connect (connection-spec (database-type (eql :mysql)))
 125   (check-connection-spec connection-spec database-type
 126                          (host db user password &optional port))
 127   (destructuring-bind (host db user password &optional port) connection-spec
 128     (let ((mysql-ptr (mysql-init (uffi:make-null-pointer 'mysql-mysql)))
 129           (socket nil))
 130       (if (uffi:null-pointer-p mysql-ptr)
 131           (error 'sql-connection-error
 132                  :database-type database-type
 133                  :connection-spec connection-spec
 134                  :error-id (mysql-errno mysql-ptr)
 135                  :message (mysql-error-string mysql-ptr))
 136         (uffi:with-cstrings ((host-native host)
 137                             (user-native user)
 138                             (password-native password)
 139                             (db-native db)
 140                             (socket-native socket))
 141           (let ((error-occurred nil))
 142             (unwind-protect
 143                 (if (uffi:null-pointer-p
 144                      (mysql-real-connect
 145                       mysql-ptr host-native user-native password-native
 146                       db-native
 147                       (etypecase port
 148                         (null 0)
 149                         (integer port)
 150                         (string (parse-integer port)))
 151                       socket-native 0))
 152                     (progn
 153                       (setq error-occurred t)
 154                       (error 'sql-connection-error
 155                              :database-type database-type
 156                              :connection-spec connection-spec
 157                              :error-id (mysql-errno mysql-ptr)
 158                              :message (mysql-error-string mysql-ptr)))
 159                     (let* ((db
 160                             (make-instance 'mysql-database
 161                                            :name (database-name-from-spec connection-spec
 162                                                                           database-type)
 163                                            :database-type :mysql
 164                                            :connection-spec connection-spec
 165                                            :server-info (uffi:convert-from-cstring
 166                                                          (mysql:mysql-get-server-info mysql-ptr))
 167                                            :mysql-ptr mysql-ptr))
 168                            (cmd "SET SESSION sql_mode='ANSI'"))
 169                       (uffi:with-cstring (cmd-cs cmd)
 170                         (if (zerop (mysql-real-query mysql-ptr cmd-cs (expression-length cmd)))
 171                             db
 172                             (progn
 173                               (warn "Error setting ANSI mode for MySQL.")
 174                               db)))))
 175               (when error-occurred (mysql-close mysql-ptr)))))))))
 176
 177
 178 (defmethod database-disconnect ((database mysql-database))
 179   (mysql-close (database-mysql-ptr database))
 180   (setf (database-mysql-ptr database) nil)
 181   t)
 182
 183
 184 (defmethod database-query (query-expression (database mysql-database)
 185                            result-types field-names)
 186   (declare (optimize (speed 3) (safety 0) (debug 0) (space 0)))
 187   (let ((mysql-ptr (database-mysql-ptr database)))
 188     (uffi:with-cstring (query-native query-expression)
 189       (if (zerop (mysql-real-query mysql-ptr query-native
 190                                    (expression-length query-expression)))
 191           (let ((res-ptr (mysql-use-result mysql-ptr)))
 192             (if res-ptr
 193                 (unwind-protect
 194                      (let ((num-fields (mysql-num-fields res-ptr)))
 195                        (declare (fixnum num-fields))
 196                        (setq result-types (canonicalize-types
 197                                     result-types num-fields
 198                                     res-ptr))
 199                        (values
 200                         (loop for row = (mysql-fetch-row res-ptr)
 201                               for lengths = (mysql-fetch-lengths res-ptr)
 202                               until (uffi:null-pointer-p row)
 203                               collect
 204                               (do* ((rlist (make-list num-fields))
 205                                     (i 0 (1+ i))
 206                                     (pos rlist (cdr pos)))
 207                                    ((= i num-fields) rlist)
 208                                 (declare (fixnum i))
 209                                 (setf (car pos)
 210                                       (convert-raw-field
 211                                        (uffi:deref-array row '(:array
 212                                                                (* :unsigned-char))
 213                                                          i)
 214                                        result-types i
 215                                        (uffi:deref-array lengths '(:array :unsigned-long)
 216                                                          i)))))
 217                         (when field-names
 218                           (result-field-names num-fields res-ptr))))
 219                   (mysql-free-result res-ptr))
 220                 (error 'sql-database-data-error
 221                        :database database
 222                        :expression query-expression
 223                        :error-id (mysql-errno mysql-ptr)
 224                        :message (mysql-error-string mysql-ptr))))
 225           (error 'sql-database-data-error
 226                  :database database
 227                  :expression query-expression
 228                  :error-id (mysql-errno mysql-ptr)
 229                  :message (mysql-error-string mysql-ptr))))))
 230
 231 (defmethod database-execute-command (sql-expression (database mysql-database))
 232   (uffi:with-cstring (sql-native sql-expression)
 233     (let ((mysql-ptr (database-mysql-ptr database)))
 234       (declare (type mysql-mysql-ptr-def mysql-ptr))
 235       (if (zerop (mysql-real-query mysql-ptr sql-native
 236                                    (expression-length sql-expression)))
 237           t
 238         (error 'sql-database-data-error
 239                :database database
 240                :expression sql-expression
 241                :error-id (mysql-errno mysql-ptr)
 242                :message (mysql-error-string mysql-ptr))))))
 243
 244
 245 (defstruct mysql-result-set
 246   (res-ptr (uffi:make-null-pointer 'mysql-mysql-res) :type mysql-mysql-res-ptr-def)
 247   (types nil :type list)
 248   (num-fields 0 :type fixnum)
 249   (full-set nil :type boolean))
 250
 251
 252 (defmethod database-query-result-set ((query-expression string)
 253                                       (database mysql-database)
 254                                       &key full-set result-types)
 255   (uffi:with-cstring (query-native query-expression)
 256     (let ((mysql-ptr (database-mysql-ptr database)))
 257      (declare (type mysql-mysql-ptr-def mysql-ptr))
 258       (if (zerop (mysql-real-query mysql-ptr query-native
 259                                    (expression-length query-expression)))
 260           (let ((res-ptr (if full-set
 261                              (mysql-store-result mysql-ptr)
 262                            (mysql-use-result mysql-ptr))))
 263             (declare (type mysql-mysql-res-ptr-def res-ptr))
 264             (if (not (uffi:null-pointer-p res-ptr))
 265                 (let* ((num-fields (mysql-num-fields res-ptr))
 266                        (result-set (make-mysql-result-set
 267                                     :res-ptr res-ptr
 268                                     :num-fields num-fields
 269                                     :full-set full-set
 270                                     :types
 271                                     (canonicalize-types
 272                                      result-types num-fields
 273                                      res-ptr))))
 274                   (if full-set
 275                       (values result-set
 276                               num-fields
 277                               (mysql-num-rows res-ptr))
 278                       (values result-set
 279                               num-fields)))
 280                 (error 'sql-database-data-error
 281                      :database database
 282                      :expression query-expression
 283                      :error-id (mysql-errno mysql-ptr)
 284                      :message (mysql-error-string mysql-ptr))))
 285         (error 'sql-database-data-error
 286                :database database
 287                :expression query-expression
 288                :error-id (mysql-errno mysql-ptr)
 289                :message (mysql-error-string mysql-ptr))))))
 290
 291 (defmethod database-dump-result-set (result-set (database mysql-database))
 292   (mysql-free-result (mysql-result-set-res-ptr result-set))
 293   t)
 294
 295
 296 (defmethod database-store-next-row (result-set (database mysql-database) list)
 297   (let* ((res-ptr (mysql-result-set-res-ptr result-set))
 298          (row (mysql-fetch-row res-ptr))
 299          (lengths (mysql-fetch-lengths res-ptr))
 300          (types (mysql-result-set-types result-set)))
 301     (declare (type mysql-mysql-res-ptr-def res-ptr)
 302              (type mysql-row-def row))
 303     (unless (uffi:null-pointer-p row)
 304       (loop for i from 0 below (mysql-result-set-num-fields result-set)
 305             for rest on list
 306             do
 307             (setf (car rest)
 308                   (convert-raw-field
 309                    (uffi:deref-array row '(:array (* :unsigned-char)) i)
 310                    types
 311                    i
 312                    (uffi:deref-array lengths '(:array :unsigned-long) i))))
 313       list)))
 314
 315
 316 ;; Table and attribute introspection
 317
 318 (defmethod database-list-tables ((database mysql-database) &key (owner nil))
 319   (declare (ignore owner))
 320   (cond
 321    ((eql #\5 (char (database-server-info database) 0))
 322     (loop for (name type) in (database-query "SHOW FULL TABLES" database nil nil)
 323           when (and (string-equal type "base table")
 324                     (not (and (>= (length name) 11)
 325                               (string-equal (subseq name 0 11) "_CLSQL_SEQ_"))))
 326           collect name))
 327    (t
 328     (remove-if #'(lambda (s)
 329                    (and (>= (length s) 11)
 330                         (string-equal (subseq s 0 11) "_CLSQL_SEQ_")))
 331                (mapcar #'car (database-query "SHOW TABLES" database nil nil))))))
 332
 333 (defmethod database-list-views ((database mysql-database)
 334                                 &key (owner nil))
 335   (declare (ignore owner))
 336   (cond
 337    ((eql #\5 (char (database-server-info database) 0))
 338     (loop for (name type) in (database-query "SHOW FULL TABLES" database nil nil)
 339           when (string-equal type "view")
 340           collect name))
 341      (t
 342       nil)))
 343
 344 (defmethod database-list-indexes ((database mysql-database)
 345                                   &key (owner nil))
 346   (let ((result '()))
 347     (dolist (table (database-list-tables database :owner owner) result)
 348       (setq result
 349         (append (database-list-table-indexes table database :owner owner)
 350                 result)))))
 351
 352 (defmethod database-list-table-indexes (table (database mysql-database)
 353                                         &key (owner nil))
 354   (declare (ignore owner))
 355   (do ((results nil)
 356        (rows (database-query
 357               (format nil "SHOW INDEX FROM ~A" table)
 358               database nil nil)
 359              (cdr rows)))
 360       ((null rows) (nreverse results))
 361     (let ((col (nth 2 (car rows))))
 362       (unless (find col results :test #'string-equal)
 363         (push col results)))))
 364
 365 (defmethod database-list-attributes ((table string) (database mysql-database)
 366                                      &key (owner nil))
 367   (declare (ignore owner))
 368   (mapcar #'car
 369           (database-query
 370            (format nil "SHOW COLUMNS FROM ~A" table)
 371            database nil nil)))
 372
 373 (defmethod database-attribute-type (attribute (table string)
 374                                     (database mysql-database)
 375                                     &key (owner nil))
 376   (declare (ignore owner))
 377   (let ((row (car (database-query
 378                    (format nil
 379                            "SHOW COLUMNS FROM ~A LIKE '~A'" table attribute)
 380                    database nil nil))))
 381     (let* ((raw-type (second row))
 382            (null (third row))
 383            (start-length (position #\( raw-type))
 384            (type (if start-length
 385                      (subseq raw-type 0 start-length)
 386                      raw-type))
 387            (length (when start-length
 388                      (parse-integer (subseq raw-type (1+ start-length))
 389                                     :junk-allowed t))))
 390       (when type
 391         (values (ensure-keyword type) length nil (if (string-equal null "YES") 1 0))))))
 392
 393 ;;; Sequence functions
 394
 395 (defun %sequence-name-to-table (sequence-name)
 396   (concatenate 'string "_CLSQL_SEQ_" (sql-escape sequence-name)))
 397
 398 (defun %table-name-to-sequence-name (table-name)
 399   (and (>= (length table-name) 11)
 400        (string-equal (subseq table-name 0 11) "_CLSQL_SEQ_")
 401        (subseq table-name 11)))
 402
 403 (defmethod database-create-sequence (sequence-name
 404                                      (database mysql-database))
 405   (let ((table-name (%sequence-name-to-table sequence-name)))
 406     (database-execute-command
 407      (concatenate 'string "CREATE TABLE " table-name
 408                   " (id int NOT NULL PRIMARY KEY AUTO_INCREMENT)")
 409      database)
 410     (database-execute-command
 411      (concatenate 'string "INSERT INTO " table-name
 412                   " VALUES (-1)")
 413      database)))
 414
 415 (defmethod database-drop-sequence (sequence-name
 416                                    (database mysql-database))
 417   (database-execute-command
 418    (concatenate 'string "DROP TABLE " (%sequence-name-to-table sequence-name))
 419    database))
 420
 421 (defmethod database-list-sequences ((database mysql-database)
 422                                     &key (owner nil))
 423   (declare (ignore owner))
 424   (mapcan #'(lambda (s)
 425               (let ((sn (%table-name-to-sequence-name (car s))))
 426                 (and sn (list sn))))
 427           (database-query "SHOW TABLES" database nil nil)))
 428
 429 (defmethod database-set-sequence-position (sequence-name
 430                                            (position integer)
 431                                            (database mysql-database))
 432   (database-execute-command
 433    (format nil "UPDATE ~A SET id=~A" (%sequence-name-to-table sequence-name)
 434            position)
 435    database)
 436   (mysql:mysql-insert-id (clsql-mysql::database-mysql-ptr database)))
 437
 438 (defmethod database-sequence-next (sequence-name (database mysql-database))
 439   (without-interrupts
 440    (database-execute-command
 441     (concatenate 'string "UPDATE " (%sequence-name-to-table sequence-name)
 442                  " SET id=LAST_INSERT_ID(id+1)")
 443     database)
 444    (mysql:mysql-insert-id (clsql-mysql::database-mysql-ptr database))))
 445
 446 (defmethod database-sequence-last (sequence-name (database mysql-database))
 447   (without-interrupts
 448     (caar (database-query
 449            (concatenate 'string "SELECT id from "
 450                         (%sequence-name-to-table sequence-name))
 451            database :auto nil))))
 452
 453 (defmethod database-create (connection-spec (type (eql :mysql)))
 454   (destructuring-bind (host name user password) connection-spec
 455     (let ((database (database-connect (list host "" user password)
 456                                       type)))
 457       (setf (slot-value database 'clsql-sys::state) :open)
 458       (unwind-protect
 459            (database-execute-command (format nil "create database ~A" name) database)
 460         (database-disconnect database)))))
 461
 462 (defmethod database-destroy (connection-spec (type (eql :mysql)))
 463   (destructuring-bind (host name user password) connection-spec
 464     (let ((database (database-connect (list host "" user password)
 465                                       type)))
 466       (setf (slot-value database 'clsql-sys::state) :open)
 467       (unwind-protect
 468           (database-execute-command (format nil "drop database ~A" name) database)
 469         (database-disconnect database)))))
 470
 471 (defmethod database-probe (connection-spec (type (eql :mysql)))
 472   (when (find (second connection-spec) (database-list connection-spec type)
 473               :test #'string-equal)
 474     t))
 475
 476 (defmethod database-list (connection-spec (type (eql :mysql)))
 477   (destructuring-bind (host name user password &optional port) connection-spec
 478     (declare (ignore name))
 479     (let ((database (database-connect (list host "mysql" user password port) type)))
 480       (unwind-protect
 481            (progn
 482              (setf (slot-value database 'clsql-sys::state) :open)
 483              (mapcar #'car (database-query "show databases" database :auto nil)))
 484         (progn
 485           (database-disconnect database)
 486           (setf (slot-value database 'clsql-sys::state) :closed))))))
 487
 488
 489 ;;; Prepared statements
 490
 491 (defclass mysql-stmt ()
 492   ((database :initarg :database :reader database)
 493    (stmt :initarg :stmt :accessor stmt)
 494    (input-bind :initarg :input-bind :reader input-bind)
 495    (output-bind :initarg :output-bind :reader output-bind)
 496    (types :initarg :types :reader types)
 497    (result-set :initarg :result-set :reader result-set)
 498    (num-fields :initarg :num-fields :reader num-fields)
 499    (field-names :initarg :field-names :accessor stmt-field-names)
 500    (length-ptr :initarg :length-ptr :reader length-ptr)
 501    (is-null-ptr :initarg :is-null-ptr :reader is-null-ptr)
 502    (result-types :initarg :result-types :reader result-types)))
 503
 504 (defun clsql-type->mysql-type (type)
 505   (cond
 506     ((in type :null) mysql-field-types#null)
 507     ((in type :int :integer) mysql-field-types#long)
 508     ((in type :short) mysql-field-types#short)
 509     ((in type :bigint) mysql-field-types#longlong)
 510     ((in type :float :double :number) mysql-field-types#double)
 511     ((and (consp type) (in (car type) :char :string :varchar)) mysql-field-types#var-string)
 512     ((or (eq type :blob) (and (consp type) (in (car type) :blob))) mysql-field-types#var-string)
 513     (t
 514        (error 'sql-user-error
 515               :message
 516               (format nil "Unknown clsql type ~A." type)))))
 517
 518 #+mysql-client-v4.1
 519 (defmethod database-prepare (sql-stmt types (database mysql-database) result-types field-names)
 520   (let* ((mysql-ptr (database-mysql-ptr database))
 521          (stmt (mysql-stmt-init mysql-ptr)))
 522     (when (uffi:null-pointer-p stmt)
 523       (error 'sql-database-error
 524              :error-id (mysql-errno mysql-ptr)
 525              :message (mysql-error-string mysql-ptr)))
 526
 527     (uffi:with-cstring (native-query sql-stmt)
 528       (unless (zerop (mysql-stmt-prepare stmt native-query (expression-length sql-stmt)))
 529         (mysql-stmt-close stmt)
 530         (error 'sql-database-error
 531                :error-id (mysql-errno mysql-ptr)
 532                :message (mysql-error-string mysql-ptr))))
 533
 534     (unless (= (mysql-stmt-param-count stmt) (length types))
 535       (mysql-stmt-close stmt)
 536       (error 'sql-database-error
 537              :message
 538              (format nil "Mysql param count (~D) does not match number of types (~D)"
 539                      (mysql-stmt-param-count stmt) (length types))))
 540
 541     (let ((rs (mysql-stmt-result-metadata stmt)))
 542       (when (uffi:null-pointer-p rs)
 543         (warn "mysql_stmt_result_metadata returned NULL")
 544         #+nil
 545         (mysql-stmt-close stmt)
 546         #+nil
 547         (error 'sql-database-error
 548                :message "mysql_stmt_result_metadata returned NULL"))
 549
 550       (let ((input-bind (uffi:allocate-foreign-object 'mysql-bind (length types)))
 551             (mysql-types (mapcar 'clsql-type->mysql-type types))
 552             field-vec num-fields is-null-ptr output-bind length-ptr)
 553
 554         (print 'a)
 555         (dotimes (i (length types))
 556           (let* ((binding (uffi:deref-array input-bind '(:array mysql-bind) i)))
 557             (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer-type)
 558               (nth i mysql-types))
 559             (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer-length) 0)))
 560
 561         (print 'b)
 562         (unless (uffi:null-pointer-p rs)
 563           (setq field-vec (mysql-fetch-fields rs)
 564                 num-fields (mysql-num-fields rs)
 565                 is-null-ptr (uffi:allocate-foreign-object :byte num-fields)
 566                 output-bind (uffi:allocate-foreign-object 'mysql-bind num-fields)
 567                 length-ptr (uffi:allocate-foreign-object :unsigned-long num-fields))
 568           (dotimes (i num-fields)
 569             (declare (fixnum i))
 570             (let* ((field (uffi:deref-array field-vec '(:array mysql-field) i))
 571                    (type (uffi:get-slot-value field 'mysql-field 'type))
 572                    (binding (uffi:deref-array output-bind '(:array mysql-bind) i)))
 573               (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer-type) type)
 574
 575               (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer-length) 0)
 576               #+need-to-allocate-foreign-object-for-this
 577               (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::is-null)
 578                 (+ i (uffi:pointer-address is-null-ptr)))
 579               #+need-to-allocate-foreign-object-for-this
 580               (setf (uffi:get-slot-value binding 'mysql-bind 'length)
 581                 (+ (* i 8) (uffi:pointer-address length-ptr)))
 582
 583               (case type
 584                 ((#.mysql-field-types#var-string #.mysql-field-types#string
 585                   #.mysql-field-types#tiny-blob #.mysql-field-types#blob
 586                   #.mysql-field-types#medium-blob #.mysql-field-types#long-blob)
 587                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer-length) 1024)
 588                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 589                    (uffi:allocate-foreign-object :unsigned-char 1024)))
 590                 (#.mysql-field-types#tiny
 591                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 592                    (uffi:allocate-foreign-object :byte)))
 593                 (#.mysql-field-types#short
 594                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 595                    (uffi:allocate-foreign-object :short)))
 596                 (#.mysql-field-types#long
 597                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 598                    ;; segfaults if supply :int on amd64
 599                    (uffi:allocate-foreign-object :long)))
 600                 #+64bit
 601                 (#.mysql-field-types#longlong
 602                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 603                    (uffi:allocate-foreign-object :long)))
 604                 (#.mysql-field-types#float
 605                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 606                    (uffi:allocate-foreign-object :float)))
 607                 (#.mysql-field-types#double
 608                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 609                    (uffi:allocate-foreign-object :double)))
 610                 ((#.mysql-field-types#time #.mysql-field-types#date
 611                   #.mysql-field-types#datetime #.mysql-field-types#timestamp)
 612                  (uffi:allocate-foreign-object 'mysql-time))
 613                 (t
 614                  (error "mysql type ~D not supported." type)))))
 615
 616           (unless (zerop (mysql-stmt-bind-result stmt output-bind))
 617             (mysql-stmt-close stmt)
 618             (error 'sql-database-error
 619                    :error-id (mysql-stmt-errno stmt)
 620                    :message  (uffi:convert-from-cstring
 621                               (mysql-stmt-error stmt)))))
 622
 623         (make-instance 'mysql-stmt
 624           :database database
 625           :stmt stmt
 626           :num-fields num-fields
 627           :input-bind input-bind
 628           :output-bind output-bind
 629           :result-set rs
 630           :result-types result-types
 631           :length-ptr length-ptr
 632           :is-null-ptr is-null-ptr
 633           :types mysql-types
 634           :field-names field-names)))))
 635
 636 #+mysql-client-v4.1
 637 (defmethod database-bind-parameter ((stmt mysql-stmt) position value)
 638   ;; FIXME: will need to allocate bind structure. This should probably be
 639   ;; done in C since the API is not mature and may change
 640   (let ((binding (uffi:deref-array (input-bind stmt) '(:array mysql-bind) (1- position)))
 641         (type (nth (1- position) (types stmt))))
 642     (setf (uffi:get-slot-value binding 'mysql-bind 'length) 0)
 643     (cond
 644      ((null value)
 645       (when (is-null-ptr stmt)
 646         (setf (uffi:deref-array (is-null-ptr stmt) '(:array :byte) (1- position)) 1)))
 647      (t
 648       (when (is-null-ptr stmt)
 649         (setf (uffi:deref-array (is-null-ptr stmt) '(:array :byte) (1- position)) 0))
 650       (case type
 651         (#.mysql-field-types#long
 652          (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer) value))
 653         (t
 654          (warn "Unknown input bind type ~D." type))
 655         )))))
 656
 657 #+mysql-client-v4.1
 658 (defmethod database-run-prepared ((stmt mysql-stmt))
 659   (print 'a1)
 660   (when (input-bind stmt)
 661     (unless (zerop (mysql-stmt-bind-param (stmt stmt) (input-bind 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   (print 'a2)
 667   (unless (zerop (mysql-stmt-execute (stmt stmt)))
 668     (error 'sql-database-error
 669            :error-id (mysql-stmt-errno (stmt stmt))
 670            :message  (uffi:convert-from-cstring
 671                       (mysql-stmt-error (stmt stmt)))))
 672   (print 'a3)
 673   (unless (zerop (mysql-stmt-store-result (stmt stmt)))
 674     (error 'sql-database-error
 675            :error-id (mysql-stmt-errno (stmt stmt))
 676            :message  (uffi:convert-from-cstring
 677                       (mysql-stmt-error (stmt stmt)))))
 678   (database-fetch-prepared-rows stmt))
 679
 680 #+mysql-client-v4.1
 681 (defun database-fetch-prepared-rows (stmt)
 682   (do ((rc (mysql-stmt-fetch (stmt stmt)) (mysql-stmt-fetch (stmt stmt)))
 683        (num-fields (num-fields stmt))
 684        (rows '()))
 685       ((not (zerop rc)) (nreverse rows))
 686     (push
 687      (loop for i from 0 below num-fields
 688            collect
 689            (let ((is-null
 690                   (not (zerop (uffi:ensure-char-integer
 691                                (uffi:deref-array (is-null-ptr stmt) '(:array :byte) i))))))
 692              (unless is-null
 693                (let* ((bind (uffi:deref-array (output-bind stmt) '(:array mysql-bind) i))
 694                       (type (uffi:get-slot-value bind 'mysql-bind 'mysql::buffer-type))
 695                       (buffer (uffi:get-slot-value bind 'mysql-bind 'mysql::buffer)))
 696                  (case type
 697                    ((#.mysql-field-types#var-string #.mysql-field-types#string
 698                      #.mysql-field-types#tiny-blob #.mysql-field-types#blob
 699                      #.mysql-field-types#medium-blob #.mysql-field-types#long-blob)
 700                     (uffi:convert-from-foreign-string buffer))
 701                     (#.mysql-field-types#tiny
 702                      (uffi:ensure-char-integer
 703                       (uffi:deref-pointer buffer :byte)))
 704                     (#.mysql-field-types#short
 705                      (uffi:deref-pointer buffer :short))
 706                     (#.mysql-field-types#long
 707                      (uffi:deref-pointer buffer :int))
 708                     #+64bit
 709                     (#.mysql-field-types#longlong
 710                      (uffi:deref-pointer buffer :long))
 711                     (#.mysql-field-types#float
 712                      (uffi:deref-pointer buffer :float))
 713                     (#.mysql-field-types#double
 714                      (uffi:deref-pointer buffer :double))
 715                    ((#.mysql-field-types#time #.mysql-field-types#date
 716                                               #.mysql-field-types#datetime #.mysql-field-types#timestamp)
 717                     (let ((year (uffi:get-slot-value buffer 'mysql-time 'mysql::year))
 718                           (month (uffi:get-slot-value buffer 'mysql-time 'mysql::month))
 719                           (day (uffi:get-slot-value buffer 'mysql-time 'mysql::day))
 720                           (hour (uffi:get-slot-value buffer 'mysql-time 'mysql::hour))
 721                           (minute (uffi:get-slot-value buffer 'mysql-time 'mysql::minute))
 722                   (second (uffi:get-slot-value buffer 'mysql-time 'mysql::second)))
 723                       (db-timestring
 724                        (make-time :year year :month month :day day :hour hour
 725                                   :minute minute :second second))))
 726                    (t
 727                     (list type)))))))
 728      rows)))
 729
 730
 731
 732
 733 #+mysql-client-v4.1
 734 (defmethod database-free-prepared ((stmt mysql-stmt))
 735   (with-slots (stmt) stmt
 736     (mysql-stmt-close stmt))
 737   )
 738
 739
 740 ;;; Database capabilities
 741
 742 (defmethod db-type-use-column-on-drop-index? ((db-type (eql :mysql)))
 743   t)
 744
 745 (defmethod db-type-has-views? ((db-type (eql :mysql)))
 746   #+mysql-client-v5 t
 747   #-mysql-client-v5 nil)
 748
 749 (defmethod db-type-has-subqueries? ((db-type (eql :mysql)))
 750   #+(or mysql-client-v4.1 mysql-client-v5) t
 751   #-(or mysql-client-v4.1 mysql-client-v5) nil)
 752
 753 (defmethod db-type-has-boolean-where? ((db-type (eql :mysql)))
 754   #+(or mysql-client-v4.1 mysql-client-v5) t
 755   #-(or mysql-client-v4.1 mysql-client-v5) nil)
 756
 757 (defmethod db-type-has-union? ((db-type (eql :mysql)))
 758   (not (eql (schar mysql::*mysql-client-info* 0) #\3)))
 759
 760 (defmethod db-type-transaction-capable? ((db-type (eql :mysql)) database)
 761   (let ((tuple (car (database-query "SHOW VARIABLES LIKE 'HAVE_INNODB'" database :auto nil))))
 762     (and tuple (string-equal "YES" (second tuple)))))
 763
 764 (defmethod db-type-has-prepared-stmt? ((db-type (eql :mysql)))
 765   #+(or mysql-client-v4.1 mysql-client-v5) t
 766   #-(or mysql-client-v4.1 mysql-client-v5) nil)
 767
 768 (when (clsql-sys:database-type-library-loaded :mysql)
 769   (clsql-sys:initialize-database-type :database-type :mysql))
 770