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                   (make-instance 'mysql-database
 160                                  :name (database-name-from-spec connection-spec
 161                                                                 database-type)
 162                                  :database-type :mysql
 163                                  :connection-spec connection-spec
 164                                  :server-info (uffi:convert-from-cstring
 165                                                (mysql:mysql-get-server-info mysql-ptr))
 166                                  :mysql-ptr mysql-ptr))
 167               (when error-occurred (mysql-close mysql-ptr)))))))))
 168
 169
 170 (defmethod database-disconnect ((database mysql-database))
 171   (mysql-close (database-mysql-ptr database))
 172   (setf (database-mysql-ptr database) nil)
 173   t)
 174
 175
 176 (defmethod database-query (query-expression (database mysql-database)
 177                            result-types field-names)
 178   (declare (optimize (speed 3) (safety 0) (debug 0) (space 0)))
 179   (let ((mysql-ptr (database-mysql-ptr database)))
 180     (uffi:with-cstring (query-native query-expression)
 181       (if (zerop (mysql-real-query mysql-ptr query-native
 182                                    (expression-length query-expression)))
 183           (let ((res-ptr (mysql-use-result mysql-ptr)))
 184             (if res-ptr
 185                 (unwind-protect
 186                      (let ((num-fields (mysql-num-fields res-ptr)))
 187                        (declare (fixnum num-fields))
 188                        (setq result-types (canonicalize-types
 189                                     result-types num-fields
 190                                     res-ptr))
 191                        (values
 192                         (loop for row = (mysql-fetch-row res-ptr)
 193                               for lengths = (mysql-fetch-lengths res-ptr)
 194                               until (uffi:null-pointer-p row)
 195                               collect
 196                               (do* ((rlist (make-list num-fields))
 197                                     (i 0 (1+ i))
 198                                     (pos rlist (cdr pos)))
 199                                    ((= i num-fields) rlist)
 200                                 (declare (fixnum i))
 201                                 (setf (car pos)
 202                                       (convert-raw-field
 203                                        (uffi:deref-array row '(:array
 204                                                                (* :unsigned-char))
 205                                                          i)
 206                                        result-types i
 207                                        (uffi:deref-array lengths '(:array :unsigned-long)
 208                                                          i)))))
 209                         (when field-names
 210                           (result-field-names num-fields res-ptr))))
 211                   (mysql-free-result res-ptr))
 212                 (error 'sql-database-data-error
 213                        :database database
 214                        :expression query-expression
 215                        :error-id (mysql-errno mysql-ptr)
 216                        :message (mysql-error-string mysql-ptr))))
 217           (error 'sql-database-data-error
 218                  :database database
 219                  :expression query-expression
 220                  :error-id (mysql-errno mysql-ptr)
 221                  :message (mysql-error-string mysql-ptr))))))
 222
 223 (defmethod database-execute-command (sql-expression (database mysql-database))
 224   (uffi:with-cstring (sql-native sql-expression)
 225     (let ((mysql-ptr (database-mysql-ptr database)))
 226       (declare (type mysql-mysql-ptr-def mysql-ptr))
 227       (if (zerop (mysql-real-query mysql-ptr sql-native
 228                                    (expression-length sql-expression)))
 229           t
 230         (error 'sql-database-data-error
 231                :database database
 232                :expression sql-expression
 233                :error-id (mysql-errno mysql-ptr)
 234                :message (mysql-error-string mysql-ptr))))))
 235
 236
 237 (defstruct mysql-result-set
 238   (res-ptr (uffi:make-null-pointer 'mysql-mysql-res) :type mysql-mysql-res-ptr-def)
 239   (types nil :type list)
 240   (num-fields 0 :type fixnum)
 241   (full-set nil :type boolean))
 242
 243
 244 (defmethod database-query-result-set ((query-expression string)
 245                                       (database mysql-database)
 246                                       &key full-set result-types)
 247   (uffi:with-cstring (query-native query-expression)
 248     (let ((mysql-ptr (database-mysql-ptr database)))
 249      (declare (type mysql-mysql-ptr-def mysql-ptr))
 250       (if (zerop (mysql-real-query mysql-ptr query-native
 251                                    (expression-length query-expression)))
 252           (let ((res-ptr (if full-set
 253                              (mysql-store-result mysql-ptr)
 254                            (mysql-use-result mysql-ptr))))
 255             (declare (type mysql-mysql-res-ptr-def res-ptr))
 256             (if (not (uffi:null-pointer-p res-ptr))
 257                 (let* ((num-fields (mysql-num-fields res-ptr))
 258                        (result-set (make-mysql-result-set
 259                                     :res-ptr res-ptr
 260                                     :num-fields num-fields
 261                                     :full-set full-set
 262                                     :types
 263                                     (canonicalize-types
 264                                      result-types num-fields
 265                                      res-ptr))))
 266                   (if full-set
 267                       (values result-set
 268                               num-fields
 269                               (mysql-num-rows res-ptr))
 270                       (values result-set
 271                               num-fields)))
 272                 (error 'sql-database-data-error
 273                      :database database
 274                      :expression query-expression
 275                      :error-id (mysql-errno mysql-ptr)
 276                      :message (mysql-error-string mysql-ptr))))
 277         (error 'sql-database-data-error
 278                :database database
 279                :expression query-expression
 280                :error-id (mysql-errno mysql-ptr)
 281                :message (mysql-error-string mysql-ptr))))))
 282
 283 (defmethod database-dump-result-set (result-set (database mysql-database))
 284   (mysql-free-result (mysql-result-set-res-ptr result-set))
 285   t)
 286
 287
 288 (defmethod database-store-next-row (result-set (database mysql-database) list)
 289   (let* ((res-ptr (mysql-result-set-res-ptr result-set))
 290          (row (mysql-fetch-row res-ptr))
 291          (lengths (mysql-fetch-lengths res-ptr))
 292          (types (mysql-result-set-types result-set)))
 293     (declare (type mysql-mysql-res-ptr-def res-ptr)
 294              (type mysql-row-def row))
 295     (unless (uffi:null-pointer-p row)
 296       (loop for i from 0 below (mysql-result-set-num-fields result-set)
 297             for rest on list
 298             do
 299             (setf (car rest)
 300                   (convert-raw-field
 301                    (uffi:deref-array row '(:array (* :unsigned-char)) i)
 302                    types
 303                    i
 304                    (uffi:deref-array lengths '(:array :unsigned-long) i))))
 305       list)))
 306
 307
 308 ;; Table and attribute introspection
 309
 310 (defmethod database-list-tables ((database mysql-database) &key (owner nil))
 311   (declare (ignore owner))
 312   (cond
 313    ((eql #\5 (char (database-server-info database) 0))
 314     (loop for (name type) in (database-query "SHOW FULL TABLES" database nil nil)
 315           when (and (string-equal type "base table")
 316                     (not (and (>= (length name) 11)
 317                               (string-equal (subseq name 0 11) "_CLSQL_SEQ_"))))
 318           collect name))
 319    (t
 320     (remove-if #'(lambda (s)
 321                    (and (>= (length s) 11)
 322                         (string-equal (subseq s 0 11) "_CLSQL_SEQ_")))
 323                (mapcar #'car (database-query "SHOW TABLES" database nil nil))))))
 324
 325 (defmethod database-list-views ((database mysql-database)
 326                                 &key (owner nil))
 327   (declare (ignore owner))
 328   (cond
 329    ((eql #\5 (char (database-server-info database) 0))
 330     (loop for (name type) in (database-query "SHOW FULL TABLES" database nil nil)
 331           when (string-equal type "view")
 332           collect name))
 333      (t
 334       nil)))
 335
 336 (defmethod database-list-indexes ((database mysql-database)
 337                                   &key (owner nil))
 338   (let ((result '()))
 339     (dolist (table (database-list-tables database :owner owner) result)
 340       (setq result
 341         (append (database-list-table-indexes table database :owner owner)
 342                 result)))))
 343
 344 (defmethod database-list-table-indexes (table (database mysql-database)
 345                                         &key (owner nil))
 346   (declare (ignore owner))
 347   (do ((results nil)
 348        (rows (database-query
 349               (format nil "SHOW INDEX FROM ~A" (string-upcase table))
 350               database nil nil)
 351              (cdr rows)))
 352       ((null rows) (nreverse results))
 353     (let ((col (nth 2 (car rows))))
 354       (unless (find col results :test #'string-equal)
 355         (push col results)))))
 356
 357 (defmethod database-list-attributes ((table string) (database mysql-database)
 358                                      &key (owner nil))
 359   (declare (ignore owner))
 360   (mapcar #'car
 361           (database-query
 362            (format nil "SHOW COLUMNS FROM ~A" table)
 363            database nil nil)))
 364
 365 (defmethod database-attribute-type (attribute (table string)
 366                                     (database mysql-database)
 367                                     &key (owner nil))
 368   (declare (ignore owner))
 369   (let ((row (car (database-query
 370                    (format nil
 371                            "SHOW COLUMNS FROM ~A LIKE '~A'" table attribute)
 372                    database nil nil))))
 373     (let* ((raw-type (second row))
 374            (null (third row))
 375            (start-length (position #\( raw-type))
 376            (type (if start-length
 377                      (subseq raw-type 0 start-length)
 378                      raw-type))
 379            (length (when start-length
 380                      (parse-integer (subseq raw-type (1+ start-length))
 381                                     :junk-allowed t))))
 382       (when type
 383         (values (ensure-keyword type) length nil (if (string-equal null "YES") 1 0))))))
 384
 385 ;;; Sequence functions
 386
 387 (defun %sequence-name-to-table (sequence-name)
 388   (concatenate 'string "_CLSQL_SEQ_" (sql-escape sequence-name)))
 389
 390 (defun %table-name-to-sequence-name (table-name)
 391   (and (>= (length table-name) 11)
 392        (string-equal (subseq table-name 0 11) "_CLSQL_SEQ_")
 393        (subseq table-name 11)))
 394
 395 (defmethod database-create-sequence (sequence-name
 396                                      (database mysql-database))
 397   (let ((table-name (%sequence-name-to-table sequence-name)))
 398     (database-execute-command
 399      (concatenate 'string "CREATE TABLE " table-name
 400                   " (id int NOT NULL PRIMARY KEY AUTO_INCREMENT)")
 401      database)
 402     (database-execute-command
 403      (concatenate 'string "INSERT INTO " table-name
 404                   " VALUES (-1)")
 405      database)))
 406
 407 (defmethod database-drop-sequence (sequence-name
 408                                    (database mysql-database))
 409   (database-execute-command
 410    (concatenate 'string "DROP TABLE " (%sequence-name-to-table sequence-name))
 411    database))
 412
 413 (defmethod database-list-sequences ((database mysql-database)
 414                                     &key (owner nil))
 415   (declare (ignore owner))
 416   (mapcan #'(lambda (s)
 417               (let ((sn (%table-name-to-sequence-name (car s))))
 418                 (and sn (list sn))))
 419           (database-query "SHOW TABLES" database nil nil)))
 420
 421 (defmethod database-set-sequence-position (sequence-name
 422                                            (position integer)
 423                                            (database mysql-database))
 424   (database-execute-command
 425    (format nil "UPDATE ~A SET id=~A" (%sequence-name-to-table sequence-name)
 426            position)
 427    database)
 428   (mysql:mysql-insert-id (clsql-mysql::database-mysql-ptr database)))
 429
 430 (defmethod database-sequence-next (sequence-name (database mysql-database))
 431   (without-interrupts
 432    (database-execute-command
 433     (concatenate 'string "UPDATE " (%sequence-name-to-table sequence-name)
 434                  " SET id=LAST_INSERT_ID(id+1)")
 435     database)
 436    (mysql:mysql-insert-id (clsql-mysql::database-mysql-ptr database))))
 437
 438 (defmethod database-sequence-last (sequence-name (database mysql-database))
 439   (without-interrupts
 440     (caar (database-query
 441            (concatenate 'string "SELECT id from "
 442                         (%sequence-name-to-table sequence-name))
 443            database :auto nil))))
 444
 445 (defmethod database-create (connection-spec (type (eql :mysql)))
 446   (destructuring-bind (host name user password &optional port) connection-spec
 447     (multiple-value-bind (output status)
 448         (clsql-sys:command-output "mysqladmin create -u~A -p~A -h~A~@[ -P~A~] ~A"
 449                                        user password
 450                                        (if host host "localhost")
 451                                        port name
 452                                        name)
 453       (if (or (not (eql 0 status))
 454               (and (search "failed" output) (search "error" output)))
 455           (error 'sql-database-error
 456                  :message
 457                  (format nil "mysql database creation failed with connection-spec ~A."
 458                          connection-spec))
 459         t))))
 460
 461 (defmethod database-destroy (connection-spec (type (eql :mysql)))
 462   (destructuring-bind (host name user password &optional port) connection-spec
 463     (multiple-value-bind (output status)
 464         (clsql-sys:command-output "mysqladmin drop -f -u~A -p~A -h~A~@[ -P~A~] ~A"
 465                                        user password
 466                                        (if host host "localhost")
 467                                        port name)
 468       (if (or (not (eql 0 status))
 469               (and (search "failed" output) (search "error" output)))
 470           (error 'sql-database-error
 471                  :message
 472                  (format nil "mysql database deletion failed with connection-spec ~A."
 473                          connection-spec))
 474         t))))
 475
 476 (defmethod database-probe (connection-spec (type (eql :mysql)))
 477   (when (find (second connection-spec) (database-list connection-spec type)
 478               :test #'string-equal)
 479     t))
 480
 481 (defmethod database-list (connection-spec (type (eql :mysql)))
 482   (destructuring-bind (host name user password &optional port) connection-spec
 483     (declare (ignore name))
 484     (let ((database (database-connect (list host "mysql" user password port) type)))
 485       (unwind-protect
 486            (progn
 487              (setf (slot-value database 'clsql-sys::state) :open)
 488              (mapcar #'car (database-query "show databases" database :auto nil)))
 489         (progn
 490           (database-disconnect database)
 491           (setf (slot-value database 'clsql-sys::state) :closed))))))
 492
 493
 494 ;;; Prepared statements
 495
 496 (defclass mysql-stmt ()
 497   ((database :initarg :database :reader database)
 498    (stmt :initarg :stmt :accessor stmt)
 499    (input-bind :initarg :input-bind :reader input-bind)
 500    (output-bind :initarg :output-bind :reader output-bind)
 501    (types :initarg :types :reader types)
 502    (result-set :initarg :result-set :reader result-set)
 503    (num-fields :initarg :num-fields :reader num-fields)
 504    (field-names :initarg :field-names :accessor stmt-field-names)
 505    (length-ptr :initarg :length-ptr :reader length-ptr)
 506    (is-null-ptr :initarg :is-null-ptr :reader is-null-ptr)
 507    (result-types :initarg :result-types :reader result-types)))
 508
 509 (defun clsql-type->mysql-type (type)
 510   (cond
 511     ((in type :null) mysql-field-types#null)
 512     ((in type :int :integer) mysql-field-types#long)
 513     ((in type :short) mysql-field-types#short)
 514     ((in type :bigint) mysql-field-types#longlong)
 515     ((in type :float :double :number) mysql-field-types#double)
 516     ((and (consp type) (in (car type) :char :string :varchar)) mysql-field-types#var-string)
 517     ((or (eq type :blob) (and (consp type) (in (car type) :blob))) mysql-field-types#var-string)
 518     (t
 519        (error 'sql-user-error
 520               :message
 521               (format nil "Unknown clsql type ~A." type)))))
 522
 523 #+mysql-client-v4.1
 524 (defmethod database-prepare (sql-stmt types (database mysql-database) result-types field-names)
 525   (let* ((mysql-ptr (database-mysql-ptr database))
 526          (stmt (mysql-stmt-init mysql-ptr)))
 527     (when (uffi:null-pointer-p stmt)
 528       (error 'sql-database-error
 529              :error-id (mysql-errno mysql-ptr)
 530              :message (mysql-error-string mysql-ptr)))
 531
 532     (uffi:with-cstring (native-query sql-stmt)
 533       (unless (zerop (mysql-stmt-prepare stmt native-query (expression-length sql-stmt)))
 534         (mysql-stmt-close stmt)
 535         (error 'sql-database-error
 536                :error-id (mysql-errno mysql-ptr)
 537                :message (mysql-error-string mysql-ptr))))
 538
 539     (unless (= (mysql-stmt-param-count stmt) (length types))
 540       (mysql-stmt-close stmt)
 541       (error 'sql-database-error
 542              :message
 543              (format nil "Mysql param count (~D) does not match number of types (~D)"
 544                      (mysql-stmt-param-count stmt) (length types))))
 545
 546     (let ((rs (mysql-stmt-result-metadata stmt)))
 547       (when (uffi:null-pointer-p rs)
 548         (warn "mysql_stmt_result_metadata returned NULL")
 549         #+nil
 550         (mysql-stmt-close stmt)
 551         #+nil
 552         (error 'sql-database-error
 553                :message "mysql_stmt_result_metadata returned NULL"))
 554
 555       (let ((input-bind (uffi:allocate-foreign-object 'mysql-bind (length types)))
 556             (mysql-types (mapcar 'clsql-type->mysql-type types))
 557             field-vec num-fields is-null-ptr output-bind length-ptr)
 558
 559         (print 'a)
 560         (dotimes (i (length types))
 561           (let* ((binding (uffi:deref-array input-bind '(:array mysql-bind) i)))
 562             (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer-type)
 563               (nth i mysql-types))
 564             (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer-length) 0)))
 565
 566         (print 'b)
 567         (unless (uffi:null-pointer-p rs)
 568           (setq field-vec (mysql-fetch-fields rs)
 569                 num-fields (mysql-num-fields rs)
 570                 is-null-ptr (uffi:allocate-foreign-object :byte num-fields)
 571                 output-bind (uffi:allocate-foreign-object 'mysql-bind num-fields)
 572                 length-ptr (uffi:allocate-foreign-object :unsigned-long num-fields))
 573           (dotimes (i num-fields)
 574             (declare (fixnum i))
 575             (let* ((field (uffi:deref-array field-vec '(:array mysql-field) i))
 576                    (type (uffi:get-slot-value field 'mysql-field 'type))
 577                    (binding (uffi:deref-array output-bind '(:array mysql-bind) i)))
 578               (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer-type) type)
 579
 580               (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer-length) 0)
 581               #+need-to-allocate-foreign-object-for-this
 582               (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::is-null)
 583                 (+ i (uffi:pointer-address is-null-ptr)))
 584               #+need-to-allocate-foreign-object-for-this
 585               (setf (uffi:get-slot-value binding 'mysql-bind 'length)
 586                 (+ (* i 8) (uffi:pointer-address length-ptr)))
 587
 588               (case type
 589                 ((#.mysql-field-types#var-string #.mysql-field-types#string
 590                   #.mysql-field-types#tiny-blob #.mysql-field-types#blob
 591                   #.mysql-field-types#medium-blob #.mysql-field-types#long-blob)
 592                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer-length) 1024)
 593                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 594                    (uffi:allocate-foreign-object :unsigned-char 1024)))
 595                 (#.mysql-field-types#tiny
 596                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 597                    (uffi:allocate-foreign-object :byte)))
 598                 (#.mysql-field-types#short
 599                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 600                    (uffi:allocate-foreign-object :short)))
 601                 (#.mysql-field-types#long
 602                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 603                    ;; segfaults if supply :int on amd64
 604                    (uffi:allocate-foreign-object :long)))
 605                 #+64bit
 606                 (#.mysql-field-types#longlong
 607                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 608                    (uffi:allocate-foreign-object :long)))
 609                 (#.mysql-field-types#float
 610                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 611                    (uffi:allocate-foreign-object :float)))
 612                 (#.mysql-field-types#double
 613                  (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer)
 614                    (uffi:allocate-foreign-object :double)))
 615                 ((#.mysql-field-types#time #.mysql-field-types#date
 616                   #.mysql-field-types#datetime #.mysql-field-types#timestamp)
 617                  (uffi:allocate-foreign-object 'mysql-time))
 618                 (t
 619                  (error "mysql type ~D not supported." type)))))
 620
 621           (unless (zerop (mysql-stmt-bind-result stmt output-bind))
 622             (mysql-stmt-close stmt)
 623             (error 'sql-database-error
 624                    :error-id (mysql-stmt-errno stmt)
 625                    :message  (uffi:convert-from-cstring
 626                               (mysql-stmt-error stmt)))))
 627
 628         (make-instance 'mysql-stmt
 629           :database database
 630           :stmt stmt
 631           :num-fields num-fields
 632           :input-bind input-bind
 633           :output-bind output-bind
 634           :result-set rs
 635           :result-types result-types
 636           :length-ptr length-ptr
 637           :is-null-ptr is-null-ptr
 638           :types mysql-types
 639           :field-names field-names)))))
 640
 641 #+mysql-client-v4.1
 642 (defmethod database-bind-parameter ((stmt mysql-stmt) position value)
 643   ;; FIXME: will need to allocate bind structure. This should probably be
 644   ;; done in C since the API is not mature and may change
 645   (let ((binding (uffi:deref-array (input-bind stmt) '(:array mysql-bind) (1- position)))
 646         (type (nth (1- position) (types stmt))))
 647     (setf (uffi:get-slot-value binding 'mysql-bind 'length) 0)
 648     (cond
 649      ((null value)
 650       (when (is-null-ptr stmt)
 651         (setf (uffi:deref-array (is-null-ptr stmt) '(:array :byte) (1- position)) 1)))
 652      (t
 653       (when (is-null-ptr stmt)
 654         (setf (uffi:deref-array (is-null-ptr stmt) '(:array :byte) (1- position)) 0))
 655       (case type
 656         (#.mysql-field-types#long
 657          (setf (uffi:get-slot-value binding 'mysql-bind 'mysql::buffer) value))
 658         (t
 659          (warn "Unknown input bind type ~D." type))
 660         )))))
 661
 662 #+mysql-client-v4.1
 663 (defmethod database-run-prepared ((stmt mysql-stmt))
 664   (print 'a1)
 665   (when (input-bind stmt)
 666     (unless (zerop (mysql-stmt-bind-param (stmt stmt) (input-bind stmt)))
 667       (error 'sql-database-error
 668              :error-id (mysql-stmt-errno (stmt stmt))
 669              :message  (uffi:convert-from-cstring
 670                         (mysql-stmt-error (stmt stmt))))))
 671   (print 'a2)
 672   (unless (zerop (mysql-stmt-execute (stmt stmt)))
 673     (error 'sql-database-error
 674            :error-id (mysql-stmt-errno (stmt stmt))
 675            :message  (uffi:convert-from-cstring
 676                       (mysql-stmt-error (stmt stmt)))))
 677   (print 'a3)
 678   (unless (zerop (mysql-stmt-store-result (stmt stmt)))
 679     (error 'sql-database-error
 680            :error-id (mysql-stmt-errno (stmt stmt))
 681            :message  (uffi:convert-from-cstring
 682                       (mysql-stmt-error (stmt stmt)))))
 683   (database-fetch-prepared-rows stmt))
 684
 685 #+mysql-client-v4.1
 686 (defun database-fetch-prepared-rows (stmt)
 687   (do ((rc (mysql-stmt-fetch (stmt stmt)) (mysql-stmt-fetch (stmt stmt)))
 688        (num-fields (num-fields stmt))
 689        (rows '()))
 690       ((not (zerop rc)) (nreverse rows))
 691     (push
 692      (loop for i from 0 below num-fields
 693            collect
 694            (let ((is-null
 695                   (not (zerop (uffi:ensure-char-integer
 696                                (uffi:deref-array (is-null-ptr stmt) '(:array :byte) i))))))
 697              (unless is-null
 698                (let* ((bind (uffi:deref-array (output-bind stmt) '(:array mysql-bind) i))
 699                       (type (uffi:get-slot-value bind 'mysql-bind 'mysql::buffer-type))
 700                       (buffer (uffi:get-slot-value bind 'mysql-bind 'mysql::buffer)))
 701                  (case type
 702                    ((#.mysql-field-types#var-string #.mysql-field-types#string
 703                      #.mysql-field-types#tiny-blob #.mysql-field-types#blob
 704                      #.mysql-field-types#medium-blob #.mysql-field-types#long-blob)
 705                     (uffi:convert-from-foreign-string buffer))
 706                     (#.mysql-field-types#tiny
 707                      (uffi:ensure-char-integer
 708                       (uffi:deref-pointer buffer :byte)))
 709                     (#.mysql-field-types#short
 710                      (uffi:deref-pointer buffer :short))
 711                     (#.mysql-field-types#long
 712                      (uffi:deref-pointer buffer :int))
 713                     #+64bit
 714                     (#.mysql-field-types#longlong
 715                      (uffi:deref-pointer buffer :long))
 716                     (#.mysql-field-types#float
 717                      (uffi:deref-pointer buffer :float))
 718                     (#.mysql-field-types#double
 719                      (uffi:deref-pointer buffer :double))
 720                    ((#.mysql-field-types#time #.mysql-field-types#date
 721                                               #.mysql-field-types#datetime #.mysql-field-types#timestamp)
 722                     (let ((year (uffi:get-slot-value buffer 'mysql-time 'mysql::year))
 723                           (month (uffi:get-slot-value buffer 'mysql-time 'mysql::month))
 724                           (day (uffi:get-slot-value buffer 'mysql-time 'mysql::day))
 725                           (hour (uffi:get-slot-value buffer 'mysql-time 'mysql::hour))
 726                           (minute (uffi:get-slot-value buffer 'mysql-time 'mysql::minute))
 727                   (second (uffi:get-slot-value buffer 'mysql-time 'mysql::second)))
 728                       (db-timestring
 729                        (make-time :year year :month month :day day :hour hour
 730                                   :minute minute :second second))))
 731                    (t
 732                     (list type)))))))
 733      rows)))
 734
 735
 736
 737
 738 #+mysql-client-v4.1
 739 (defmethod database-free-prepared ((stmt mysql-stmt))
 740   (with-slots (stmt) stmt
 741     (mysql-stmt-close stmt))
 742   )
 743
 744
 745 ;;; Database capabilities
 746
 747 (defmethod db-type-use-column-on-drop-index? ((db-type (eql :mysql)))
 748   t)
 749
 750 (defmethod db-type-has-views? ((db-type (eql :mysql)))
 751   #+mysql-client-v5 t
 752   #-mysql-client-v5 nil)
 753
 754 (defmethod db-type-has-subqueries? ((db-type (eql :mysql)))
 755   #+(or mysql-client-v4.1 mysql-client-v5) t
 756   #-(or mysql-client-v4.1 mysql-client-v5) nil)
 757
 758 (defmethod db-type-has-boolean-where? ((db-type (eql :mysql)))
 759   #+(or mysql-client-v4.1 mysql-client-v5) t
 760   #-(or mysql-client-v4.1 mysql-client-v5) nil)
 761
 762 (defmethod db-type-has-union? ((db-type (eql :mysql)))
 763   (not (eql (schar mysql::*mysql-client-info* 0) #\3)))
 764
 765 (defmethod db-type-transaction-capable? ((db-type (eql :mysql)) database)
 766   (let ((tuple (car (database-query "SHOW VARIABLES LIKE 'HAVE_INNODB'" database :auto nil))))
 767     (and tuple (string-equal "YES" (second tuple)))))
 768
 769 (defmethod db-type-has-prepared-stmt? ((db-type (eql :mysql)))
 770   #+(or mysql-client-v4.1 mysql-client-v5) t
 771   #-(or mysql-client-v4.1 mysql-client-v5) nil)
 772
 773 (when (clsql-sys:database-type-library-loaded :mysql)
 774   (clsql-sys:initialize-database-type :database-type :mysql))
 775