db-odbc/odbc-api.lisp

   1 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Package: odbc -*-
   2 ;;;; *************************************************************************
   3 ;;;; FILE IDENTIFICATION
   4 ;;;;
   5 ;;;; Name:     odbc-api.lisp
   6 ;;;; Purpose:  Low-level ODBC API using UFFI
   7 ;;;; Authors:  Kevin M. Rosenberg and Paul Meurer
   8 ;;;;
   9 ;;;; This file, part of CLSQL, is Copyright (c) 2004 by Kevin M. Rosenberg
  10 ;;;; and Copyright (C) Paul Meurer 1999 - 2001. All rights reserved.
  11 ;;;;
  12 ;;;; CLSQL users are granted the rights to distribute and use this software
  13 ;;;; as governed by the terms of the Lisp Lesser GNU Public License
  14 ;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
  15 ;;;; *************************************************************************
  16
  17 (in-package #:odbc)
  18
  19 (defvar *null* nil
  20   "Lisp representation of SQL Null value, default = nil.
  21 May be locally bound to something else if a certain type is necessary.")
  22
  23
  24 (defvar *binary-format* :unsigned-byte-vector)
  25 (defvar *time-conversion-function*
  26     (lambda (universal-time &optional fraction)
  27        (let ((time (clsql-sys:utime->time universal-time)))
  28          (setf time (clsql-sys:time+
  29                      time
  30                      (clsql-sys:make-duration :usec (/ fraction 1000))))
  31          (clsql-sys:format-time nil time :format :iso))
  32       #+ignore
  33       universal-time)
  34    "Bound to a function that converts from a Lisp universal time fixnum (and a fractional
  35 as possible second argument) to the desired representation of date/time/timestamp. By default, returns an iso-timestring.")
  36
  37 (defvar +null-ptr+ (make-null-pointer :byte))
  38 (defparameter +null-handle-ptr+ (make-null-pointer :void))
  39 (defvar *info-output* nil
  40   "Stream to send SUCCESS_WITH_INFO messages.")
  41
  42 (defmacro %put-str (ptr string &optional max-length)
  43   (let ((size (gensym)))
  44     `(let ((,size (length ,string)))
  45        (when (and ,max-length (> ,size ,max-length))
  46          (error 'clsql:sql-database-data-error
  47                 :message
  48                 (format nil "string \"~a\" of length ~d is longer than max-length: ~d"
  49                         ,string ,size ,max-length)))
  50       (with-cast-pointer (char-ptr ,ptr :byte)
  51         (dotimes (i ,size)
  52           (setf (deref-array char-ptr '(:array :byte) i)
  53                 (char-code (char ,string i))))
  54         (setf (deref-array char-ptr '(:array :byte) ,size) 0)))))
  55
  56 (defun %cstring-into-vector (ptr vector offset size-in-bytes)
  57   (dotimes (i size-in-bytes)
  58     (setf (schar vector offset)
  59       (ensure-char-character
  60        (deref-array ptr '(:array :unsigned-char) i)))
  61     (incf offset))
  62   offset)
  63
  64 (defmacro with-allocate-foreign-string ((var len) &body body)
  65   "Safely does uffi:allocate-foreign-string-- making sure we do the uffi:free-foreign-object"
  66   `(let ((,var))
  67     (unwind-protect
  68          (progn
  69            (setf ,var (uffi:allocate-foreign-string ,len))
  70            ,@body)
  71       (when ,var
  72         (uffi:free-foreign-object ,var)))))
  73
  74 (defmacro with-allocate-foreign-strings (bindings &rest body)
  75   (if bindings
  76       `(with-allocate-foreign-string ,(car bindings)
  77         (with-allocate-foreign-strings ,(cdr bindings)
  78           ,@body))
  79       `(progn ,@body)))
  80
  81 (defun handle-error (henv hdbc hstmt)
  82   (with-allocate-foreign-strings ((sql-state 256)
  83                                   (error-message #.$SQL_MAX_MESSAGE_LENGTH))
  84    (with-foreign-objects ((error-code #.$ODBC-LONG-TYPE)
  85                           (msg-length :short))
  86     (SQLError henv hdbc hstmt sql-state
  87               error-code error-message
  88               #.$SQL_MAX_MESSAGE_LENGTH msg-length)
  89     (values
  90      (convert-from-foreign-string error-message)
  91      (convert-from-foreign-string sql-state)
  92      (deref-pointer msg-length :short)
  93      (deref-pointer error-code #.$ODBC-LONG-TYPE)))))
  94
  95 (defun sql-state (henv hdbc hstmt)
  96   (with-allocate-foreign-strings ((sql-state 256)
  97                                   (error-message #.$SQL_MAX_MESSAGE_LENGTH))
  98    (with-foreign-objects ((error-code #.$ODBC-LONG-TYPE)
  99                           (msg-length :short))
 100     (SQLError henv hdbc hstmt sql-state error-code
 101               error-message #.$SQL_MAX_MESSAGE_LENGTH msg-length)
 102     (convert-from-foreign-string sql-state)
 103     ;; test this: return a keyword for efficiency
 104     ;;(%cstring-to-keyword state)
 105     )))
 106
 107 (defmacro with-error-handling ((&key henv hdbc hstmt (print-info t))
 108                                    odbc-call &body body)
 109   (let ((result-code (gensym "RC-")))
 110     `(let ((,result-code ,odbc-call))
 111
 112       ;; Check for allegro v7 & v8 bug with ODBC calls returning
 113       ;; 32-bit unsigned ints, not 16-bit signed ints
 114       #+(and allegro mswindows)
 115       (when (> ,result-code #xFFFF)
 116         (warn (format nil "16-bit return bug: result-code #x~X for expression ~S"
 117                       ,result-code (quote ,odbc-call)))
 118         (setq ,result-code (logand ,result-code #xFFFF))
 119         (when (> ,result-code #x7FFF)
 120           (setq ,result-code (- ,result-code #x10000))))
 121
 122        (case ,result-code
 123          (#.$SQL_SUCCESS
 124           (progn ,result-code ,@body))
 125          (#.$SQL_SUCCESS_WITH_INFO
 126           (when ,print-info
 127             (multiple-value-bind (error-message sql-state)
 128                 (handle-error (or ,henv +null-handle-ptr+)
 129                               (or ,hdbc +null-handle-ptr+)
 130                               (or ,hstmt +null-handle-ptr+))
 131               (when *info-output*
 132                 (format *info-output* "[ODBC info ~A] ~A state: ~A"
 133                         ,result-code error-message
 134                         sql-state))))
 135           (progn ,result-code ,@body))
 136          (#.$SQL_INVALID_HANDLE
 137           (error
 138            'clsql-sys:sql-database-error
 139            :message "ODBC: Invalid handle"))
 140          (#.$SQL_STILL_EXECUTING
 141           (error
 142            'clsql-sys:sql-temporary-error
 143            :message "ODBC: Still executing"))
 144          (#.$SQL_ERROR
 145           (multiple-value-bind (error-message sql-state)
 146               (handle-error (or ,henv +null-handle-ptr+)
 147                             (or ,hdbc +null-handle-ptr+)
 148                             (or ,hstmt +null-handle-ptr+))
 149             (error
 150              'clsql-sys:sql-database-error
 151              :message error-message
 152              :secondary-error-id sql-state)))
 153          (#.$SQL_NO_DATA_FOUND
 154           (progn ,result-code ,@body))
 155          ;; work-around for Allegro 7.0beta AMD64 which returns negative numbers
 156          (otherwise
 157           (multiple-value-bind (error-message sql-state)
 158               (handle-error (or ,henv +null-handle-ptr+)
 159                             (or ,hdbc +null-handle-ptr+)
 160                             (or ,hstmt +null-handle-ptr+))
 161             (error
 162              'clsql-sys:sql-database-error
 163              :message error-message
 164              :secondary-error-id sql-state))
 165           #+ignore
 166           (progn ,result-code ,@body))))))
 167
 168 (defun %new-environment-handle ()
 169   (let ((henv
 170          (with-foreign-object (phenv 'sql-handle)
 171            (with-error-handling
 172                ()
 173              (SQLAllocHandle $SQL_HANDLE_ENV +null-handle-ptr+ phenv)
 174              (deref-pointer phenv 'sql-handle)))))
 175     (%set-attr-odbc-version henv $SQL_OV_ODBC3)
 176     henv))
 177
 178
 179 (defun %sql-free-environment (henv)
 180   (with-error-handling
 181     (:henv henv)
 182     (SQLFreeEnv henv)))
 183
 184 (defun %new-db-connection-handle (henv)
 185   (with-foreign-object (phdbc 'sql-handle)
 186     (setf (deref-pointer phdbc 'sql-handle) +null-handle-ptr+)
 187     (with-error-handling
 188       (:henv henv)
 189       (SQLAllocHandle $SQL_HANDLE_DBC henv phdbc)
 190       (deref-pointer phdbc 'sql-handle))))
 191
 192 (defun %free-statement (hstmt option)
 193   (with-error-handling
 194       (:hstmt hstmt)
 195       (SQLFreeStmt
 196        hstmt
 197        (ecase option
 198          (:drop $SQL_DROP)
 199          (:close $SQL_CLOSE)
 200          (:unbind $SQL_UNBIND)
 201          (:reset $SQL_RESET_PARAMS)))))
 202
 203 (defmacro with-statement-handle ((hstmt hdbc) &body body)
 204   `(let ((,hstmt (%new-statement-handle ,hdbc)))
 205      (unwind-protect
 206        (progn ,@body)
 207        (%free-statement ,hstmt :drop))))
 208
 209 ;; functional interface
 210
 211 (defun %sql-connect (hdbc server uid pwd)
 212   (with-cstrings ((server-ptr server)
 213                   (uid-ptr uid)
 214                   (pwd-ptr pwd))
 215     (with-error-handling
 216         (:hdbc hdbc)
 217       (SQLConnect hdbc server-ptr $SQL_NTS uid-ptr
 218                   $SQL_NTS pwd-ptr $SQL_NTS))))
 219
 220 (defun %sql-driver-connect (hdbc connection-string completion window-handle)
 221   (with-cstring (connection-ptr connection-string)
 222     (with-allocate-foreign-string (completed-connection-string-ptr $SQL_MAX_CONN_OUT)
 223       (with-foreign-object (completed-connection-length :short)
 224        (with-error-handling
 225            (:hdbc hdbc)
 226            (SQLDriverConnect hdbc
 227                              window-handle
 228                              connection-ptr $SQL_NTS
 229                              completed-connection-string-ptr $SQL_MAX_CONN_OUT
 230                              completed-connection-length
 231                              completion))))))
 232
 233 (defun %disconnect (hdbc)
 234   (with-error-handling
 235     (:hdbc hdbc)
 236     (SQLDisconnect hdbc)
 237     (with-error-handling
 238         (:hdbc hdbc)
 239         (SQLFreeHandle $SQL_HANDLE_DBC hdbc))))
 240
 241 (defun %commit (henv hdbc)
 242   (with-error-handling
 243     (:henv henv :hdbc hdbc)
 244     (SQLTransact
 245      henv hdbc $SQL_COMMIT)))
 246
 247 (defun %rollback (henv hdbc)
 248   (with-error-handling
 249     (:henv henv :hdbc hdbc)
 250     (SQLTransact
 251      henv hdbc $SQL_ROLLBACK)))
 252
 253 ; col-nr is zero-based in Lisp but 1 based in sql
 254 ; col-nr = :bookmark retrieves a bookmark.
 255 (defun %bind-column (hstmt column-nr c-type data-ptr precision out-len-ptr)
 256   (with-error-handling
 257     (:hstmt hstmt)
 258     (SQLBindCol hstmt
 259                 (if (eq column-nr :bookmark) 0 (1+ column-nr))
 260                 c-type data-ptr precision out-len-ptr)))
 261
 262 ; parameter-nr is zero-based in Lisp
 263 (defun %sql-bind-parameter (hstmt parameter-nr parameter-type c-type
 264                                       sql-type precision scale data-ptr
 265                                       max-value out-len-ptr)
 266   (with-error-handling
 267     (:hstmt hstmt)
 268     (SQLBindParameter hstmt (1+ parameter-nr)
 269                       parameter-type ;$SQL_PARAM_INPUT
 270                       c-type ;$SQL_C_CHAR
 271                       sql-type ;$SQL_VARCHAR
 272                       precision ;(1- (length str))
 273                       scale ;0
 274                       data-ptr
 275                       max-value
 276                       out-len-ptr ;#.+null-ptr+
 277                       )))
 278
 279 (defun %sql-fetch (hstmt)
 280   (with-error-handling
 281       (:hstmt hstmt)
 282       (SQLFetch hstmt)))
 283
 284 (defun %new-statement-handle (hdbc)
 285   (let ((statement-handle
 286          (with-foreign-object (phstmt 'sql-handle)
 287            (with-error-handling
 288                (:hdbc hdbc)
 289              (SQLAllocHandle $SQL_HANDLE_STMT hdbc phstmt)
 290              (deref-pointer phstmt 'sql-handle)))))
 291     (if (uffi:null-pointer-p statement-handle)
 292         (error 'clsql:sql-database-error :message "Received null statement handle.")
 293         statement-handle)))
 294
 295 (defun %sql-get-info (hdbc info-type)
 296   (ecase info-type
 297     ;; those return string
 298     ((#.$SQL_ACCESSIBLE_PROCEDURES
 299       #.$SQL_ACCESSIBLE_TABLES
 300       #.$SQL_COLUMN_ALIAS
 301       #.$SQL_DATA_SOURCE_NAME
 302       #.$SQL_DATA_SOURCE_READ_ONLY
 303       #.$SQL_DBMS_NAME
 304       #.$SQL_DBMS_VER
 305       #.$SQL_DRIVER_NAME
 306       #.$SQL_DRIVER_ODBC_VER
 307       #.$SQL_DRIVER_VER
 308       #.$SQL_EXPRESSIONS_IN_ORDERBY
 309       #.$SQL_IDENTIFIER_QUOTE_CHAR
 310       #.$SQL_KEYWORDS
 311       #.$SQL_LIKE_ESCAPE_CLAUSE
 312       #.$SQL_MAX_ROW_SIZE_INCLUDES_LONG
 313       #.$SQL_MULT_RESULT_SETS
 314       #.$SQL_MULTIPLE_ACTIVE_TXN
 315       #.$SQL_NEED_LONG_DATA_LEN
 316       #.$SQL_ODBC_SQL_OPT_IEF
 317       #.$SQL_ODBC_VER
 318       #.$SQL_ORDER_BY_COLUMNS_IN_SELECT
 319       #.$SQL_OUTER_JOINS
 320       #.$SQL_OWNER_TERM
 321       #.$SQL_PROCEDURE_TERM
 322       #.$SQL_PROCEDURES
 323       #.$SQL_QUALIFIER_NAME_SEPARATOR
 324       #.$SQL_QUALIFIER_TERM
 325       #.$SQL_ROW_UPDATES
 326       #.$SQL_SEARCH_PATTERN_ESCAPE
 327       #.$SQL_SERVER_NAME
 328       #.$SQL_SPECIAL_CHARACTERS
 329       #.$SQL_TABLE_TERM
 330       #.$SQL_USER_NAME)
 331      (with-allocate-foreign-string (info-ptr 1024)
 332        (with-foreign-object (info-length-ptr :short)
 333         (with-error-handling
 334             (:hdbc hdbc)
 335             (SQLGetInfo hdbc info-type info-ptr 1023 info-length-ptr)
 336           (convert-from-foreign-string info-ptr)))))
 337     ;; those returning a word
 338     ((#.$SQL_ACTIVE_CONNECTIONS
 339       #.$SQL_ACTIVE_STATEMENTS
 340       #.$SQL_CONCAT_NULL_BEHAVIOR
 341       #.$SQL_CORRELATION_NAME
 342       #.$SQL_CURSOR_COMMIT_BEHAVIOR
 343       #.$SQL_CURSOR_ROLLBACK_BEHAVIOR
 344       #.$SQL_MAX_COLUMN_NAME_LEN
 345       #.$SQL_MAX_COLUMNS_IN_GROUP_BY
 346       #.$SQL_MAX_COLUMNS_IN_INDEX
 347       #.$SQL_MAX_COLUMNS_IN_ORDER_BY
 348       #.$SQL_MAX_COLUMNS_IN_SELECT
 349       #.$SQL_MAX_COLUMNS_IN_TABLE
 350       #.$SQL_MAX_CURSOR_NAME_LEN
 351       #.$SQL_MAX_OWNER_NAME_LEN
 352       #.$SQL_MAX_PROCEDURE_NAME_LEN
 353       #.$SQL_MAX_QUALIFIER_NAME_LEN
 354       #.$SQL_MAX_TABLE_NAME_LEN
 355       #.$SQL_MAX_TABLES_IN_SELECT
 356       #.$SQL_MAX_USER_NAME_LEN
 357       #.$SQL_NON_NULLABLE_COLUMNS
 358       #.$SQL_NULL_COLLATION
 359       #.$SQL_ODBC_API_CONFORMANCE
 360       #.$SQL_ODBC_SAG_CLI_CONFORMANCE
 361       #.$SQL_ODBC_SQL_CONFORMANCE
 362       #.$SQL_QUALIFIER_LOCATION
 363       #.$SQL_QUOTED_IDENTIFIER_CASE
 364       #.$SQL_TXN_CAPABLE)
 365      (with-foreign-objects ((info-ptr :short)
 366                             (info-length-ptr :short))
 367        (with-error-handling
 368         (:hdbc hdbc)
 369          (SQLGetInfo hdbc
 370                      info-type
 371                      info-ptr
 372                      255
 373                      info-length-ptr)
 374          (deref-pointer info-ptr :short)))
 375      )
 376     ;; those returning a long bitmask
 377     ((#.$SQL_ALTER_TABLE
 378       #.$SQL_BOOKMARK_PERSISTENCE
 379       #.$SQL_CONVERT_BIGINT
 380       #.$SQL_CONVERT_BINARY
 381       #.$SQL_CONVERT_BIT
 382       #.$SQL_CONVERT_CHAR
 383       #.$SQL_CONVERT_DATE
 384       #.$SQL_CONVERT_DECIMAL
 385       #.$SQL_CONVERT_DOUBLE
 386       #.$SQL_CONVERT_FLOAT
 387       #.$SQL_CONVERT_INTEGER
 388       #.$SQL_CONVERT_LONGVARCHAR
 389       #.$SQL_CONVERT_NUMERIC
 390       #.$SQL_CONVERT_REAL
 391       #.$SQL_CONVERT_SMALLINT
 392       #.$SQL_CONVERT_TIME
 393       #.$SQL_CONVERT_TIMESTAMP
 394       #.$SQL_CONVERT_TINYINT
 395       #.$SQL_CONVERT_VARBINARY
 396       #.$SQL_CONVERT_VARCHAR
 397       #.$SQL_CONVERT_LONGVARBINARY
 398       #.$SQL_CONVERT_FUNCTIONS
 399       #.$SQL_FETCH_DIRECTION
 400       #.$SQL_FILE_USAGE
 401       #.$SQL_GETDATA_EXTENSIONS
 402       #.$SQL_LOCK_TYPES
 403       #.$SQL_MAX_INDEX_SIZE
 404       #.$SQL_MAX_ROW_SIZE
 405       #.$SQL_MAX_STATEMENT_LEN
 406       #.$SQL_NUMERIC_FUNCTIONS
 407       #.$SQL_OWNER_USAGE
 408       #.$SQL_POS_OPERATIONS
 409       #.$SQL_POSITIONED_STATEMENTS
 410       #.$SQL_QUALIFIER_USAGE
 411       #.$SQL_SCROLL_CONCURRENCY
 412       #.$SQL_SCROLL_OPTIONS
 413       #.$SQL_STATIC_SENSITIVITY
 414       #.$SQL_STRING_FUNCTIONS
 415       #.$SQL_SUBQUERIES
 416       #.$SQL_SYSTEM_FUNCTIONS
 417       #.$SQL_TIMEDATE_ADD_INTERVALS
 418       #.$SQL_TIMEDATE_DIFF_INTERVALS
 419       #.$SQL_TIMEDATE_FUNCTIONS
 420       #.$SQL_TXN_ISOLATION_OPTION
 421       #.$SQL_UNION)
 422      (with-foreign-objects ((info-ptr #.$ODBC-LONG-TYPE)
 423                             (info-length-ptr :short))
 424        (with-error-handling
 425          (:hdbc hdbc)
 426          (SQLGetInfo hdbc
 427                      info-type
 428                      info-ptr
 429                      255
 430                      info-length-ptr)
 431          (deref-pointer info-ptr #.$ODBC-LONG-TYPE)))
 432      )
 433     ;; those returning a long integer
 434     ((#.$SQL_DEFAULT_TXN_ISOLATION
 435       #.$SQL_DRIVER_HDBC
 436       #.$SQL_DRIVER_HENV
 437       #.$SQL_DRIVER_HLIB
 438       #.$SQL_DRIVER_HSTMT
 439       #.$SQL_GROUP_BY
 440       #.$SQL_IDENTIFIER_CASE
 441       #.$SQL_MAX_BINARY_LITERAL_LEN
 442       #.$SQL_MAX_CHAR_LITERAL_LEN
 443       #.$SQL_ACTIVE_ENVIRONMENTS
 444       )
 445      (with-foreign-objects ((info-ptr #.$ODBC-LONG-TYPE)
 446                             (info-length-ptr :short))
 447        (with-error-handling
 448          (:hdbc hdbc)
 449          (SQLGetInfo hdbc info-type info-ptr 255 info-length-ptr)
 450          (deref-pointer info-ptr #.$ODBC-LONG-TYPE))))))
 451
 452 (defun %sql-exec-direct (sql hstmt henv hdbc)
 453   (with-cstring (sql-ptr sql)
 454     (with-error-handling
 455       (:hstmt hstmt :henv henv :hdbc hdbc)
 456       (SQLExecDirect hstmt sql-ptr $SQL_NTS))))
 457
 458 (defun %sql-cancel (hstmt)
 459   (with-error-handling
 460     (:hstmt hstmt)
 461     (SQLCancel hstmt)))
 462
 463 (defun %sql-execute (hstmt)
 464   (with-error-handling
 465     (:hstmt hstmt)
 466     (SQLExecute hstmt)))
 467
 468 (defun result-columns-count (hstmt)
 469   (with-foreign-objects ((columns-nr-ptr :short))
 470     (with-error-handling (:hstmt hstmt)
 471                          (SQLNumResultCols hstmt columns-nr-ptr)
 472       (deref-pointer columns-nr-ptr :short))))
 473
 474 (defun result-rows-count (hstmt)
 475   (with-foreign-objects ((row-count-ptr #.$ODBC-LONG-TYPE))
 476     (with-error-handling (:hstmt hstmt)
 477                          (SQLRowCount hstmt row-count-ptr)
 478       (deref-pointer row-count-ptr #.$ODBC-LONG-TYPE))))
 479
 480 ;; column counting is 1-based
 481 (defun %describe-column (hstmt column-nr)
 482   (with-allocate-foreign-string (column-name-ptr 256)
 483     (with-foreign-objects ((column-name-length-ptr :short)
 484                            (column-sql-type-ptr :short)
 485                            (column-precision-ptr #.$ODBC-ULONG-TYPE)
 486                            (column-scale-ptr :short)
 487                            (column-nullable-p-ptr :short))
 488      (with-error-handling (:hstmt hstmt)
 489          (SQLDescribeCol hstmt column-nr column-name-ptr 256
 490                          column-name-length-ptr
 491                          column-sql-type-ptr
 492                          column-precision-ptr
 493                          column-scale-ptr
 494                          column-nullable-p-ptr)
 495        (values
 496         (convert-from-foreign-string column-name-ptr)
 497         (deref-pointer column-sql-type-ptr :short)
 498         (deref-pointer column-precision-ptr #.$ODBC-ULONG-TYPE)
 499         (deref-pointer column-scale-ptr :short)
 500         (deref-pointer column-nullable-p-ptr :short))))))
 501
 502 ;; parameter counting is 1-based
 503 ;; this function isn't used, which is good because FreeTDS dosn't support it.
 504 (defun %describe-parameter (hstmt parameter-nr)
 505   (with-foreign-objects ((column-sql-type-ptr :short)
 506                          (column-precision-ptr #.$ODBC-ULONG-TYPE)
 507                          (column-scale-ptr :short)
 508                          (column-nullable-p-ptr :short))
 509     (with-error-handling
 510       (:hstmt hstmt)
 511       (SQLDescribeParam hstmt parameter-nr
 512                         column-sql-type-ptr
 513                         column-precision-ptr
 514                         column-scale-ptr
 515                         column-nullable-p-ptr)
 516       (values
 517        (deref-pointer column-sql-type-ptr :short)
 518        (deref-pointer column-precision-ptr #.$ODBC-ULONG-TYPE)
 519        (deref-pointer column-scale-ptr :short)
 520        (deref-pointer column-nullable-p-ptr :short)))))
 521
 522 (defun %column-attributes (hstmt column-nr descriptor-type)
 523   (with-allocate-foreign-string (descriptor-info-ptr 256)
 524     (with-foreign-objects ((descriptor-length-ptr :short)
 525                            (numeric-descriptor-ptr #.$ODBC-LONG-TYPE))
 526      (with-error-handling
 527          (:hstmt hstmt)
 528          (SQLColAttributes hstmt column-nr descriptor-type descriptor-info-ptr
 529                            256 descriptor-length-ptr
 530                            numeric-descriptor-ptr)
 531        (values
 532         (convert-from-foreign-string descriptor-info-ptr)
 533         (deref-pointer numeric-descriptor-ptr #.$ODBC-LONG-TYPE))))))
 534
 535 (defun %prepare-describe-columns (hstmt table-qualifier table-owner
 536                                    table-name column-name)
 537   (with-cstrings ((table-qualifier-ptr table-qualifier)
 538                   (table-owner-ptr table-owner)
 539                   (table-name-ptr table-name)
 540                   (column-name-ptr column-name))
 541     (with-error-handling
 542         (:hstmt hstmt)
 543       (SQLColumns hstmt
 544                   table-qualifier-ptr (length table-qualifier)
 545                   table-owner-ptr (length table-owner)
 546                   table-name-ptr (length table-name)
 547                   column-name-ptr (length column-name)))))
 548
 549 (defun %describe-columns (hdbc table-qualifier table-owner
 550                           table-name column-name)
 551   (with-statement-handle (hstmt hdbc)
 552     (%prepare-describe-columns hstmt table-qualifier table-owner
 553                                table-name column-name)
 554     (fetch-all-rows hstmt)))
 555
 556 (defun %sql-data-sources (henv &key (direction :first))
 557   (with-allocate-foreign-strings ((name-ptr (1+ $SQL_MAX_DSN_LENGTH))
 558                                   (description-ptr 1024))
 559    (with-foreign-objects ((name-length-ptr :short)
 560                           (description-length-ptr :short))
 561     (let ((res (with-error-handling
 562                    (:henv henv)
 563                    (SQLDataSources henv
 564                                    (ecase direction
 565                                      (:first $SQL_FETCH_FIRST)
 566                                      (:next $SQL_FETCH_NEXT))
 567                                    name-ptr
 568                                    (1+ $SQL_MAX_DSN_LENGTH)
 569                                    name-length-ptr
 570                                    description-ptr
 571                                    1024
 572                                    description-length-ptr))))
 573       (when (= res $SQL_NO_DATA_FOUND)
 574         (values
 575           (convert-from-foreign-string name-ptr)
 576           (convert-from-foreign-string description-ptr)))))))
 577
 578
 579
 580 (defun sql-to-c-type (sql-type)
 581   (ecase sql-type
 582     ((#.$SQL_CHAR #.$SQL_VARCHAR #.$SQL_LONGVARCHAR
 583       #.$SQL_NUMERIC #.$SQL_DECIMAL -8 -9 -10) $SQL_C_CHAR) ;; Added -10 for MSSQL ntext type
 584     (#.$SQL_INTEGER $SQL_C_SLONG)
 585     (#.$SQL_BIGINT $SQL_C_SBIGINT)
 586     (#.$SQL_SMALLINT $SQL_C_SSHORT)
 587     (#.$SQL_DOUBLE $SQL_C_DOUBLE)
 588     (#.$SQL_FLOAT $SQL_C_DOUBLE)
 589     (#.$SQL_REAL $SQL_C_FLOAT)
 590     (#.$SQL_DATE $SQL_C_DATE)
 591     (#.$SQL_TIME $SQL_C_TIME)
 592     (#.$SQL_TIMESTAMP $SQL_C_TIMESTAMP)
 593     (#.$SQL_TYPE_DATE $SQL_C_TYPE_DATE)
 594     (#.$SQL_TYPE_TIME $SQL_C_TYPE_TIME)
 595     (#.$SQL_TYPE_TIMESTAMP $SQL_C_TYPE_TIMESTAMP)
 596     ((#.$SQL_BINARY #.$SQL_VARBINARY #.$SQL_LONGVARBINARY) $SQL_C_BINARY)
 597     (#.$SQL_TINYINT $SQL_C_STINYINT)
 598     (#.$SQL_BIT $SQL_C_BIT)))
 599
 600 (def-type byte-pointer-type (* :byte))
 601 (def-type short-pointer-type (* :short))
 602 (def-type int-pointer-type (* :int))
 603 (def-type long-pointer-type (* #.$ODBC-LONG-TYPE))
 604 (def-type big-pointer-type (* #.$ODBC-BIG-TYPE))
 605 (def-type float-pointer-type (* :float))
 606 (def-type double-pointer-type (* :double))
 607 (def-type string-pointer-type (* :unsigned-char))
 608
 609 (defun get-cast-byte (ptr)
 610   (locally (declare (type byte-pointer-type ptr))
 611     (deref-pointer ptr :byte)))
 612
 613 (defun get-cast-short (ptr)
 614   (locally (declare (type short-pointer-type ptr))
 615     (deref-pointer ptr :short)))
 616
 617 (defun get-cast-int (ptr)
 618   (locally (declare (type int-pointer-type ptr))
 619     (deref-pointer ptr :int)))
 620
 621 (defun get-cast-long (ptr)
 622   (locally (declare (type long-pointer-type ptr))
 623     (deref-pointer ptr #.$ODBC-LONG-TYPE)))
 624
 625 (defun get-cast-big (ptr)
 626   (locally (declare (type big-pointer-type ptr))
 627     (deref-pointer ptr #.$ODBC-BIG-TYPE)))
 628
 629 (defun get-cast-single-float (ptr)
 630   (locally (declare (type float-pointer-type ptr))
 631     (deref-pointer ptr :float)))
 632
 633 (defun get-cast-double-float (ptr)
 634   (locally (declare (type double-pointer-type ptr))
 635     (deref-pointer ptr :double)))
 636
 637 (defun get-cast-foreign-string (ptr)
 638   (locally (declare (type string-pointer-type ptr))
 639     (convert-from-foreign-string ptr)))
 640
 641 (defun get-cast-binary (ptr len format)
 642   "FORMAT is one of :unsigned-byte-vector, :bit-vector (:string, :hex-string)"
 643   (with-cast-pointer (casted ptr :unsigned-byte)
 644     (ecase format
 645       (:unsigned-byte-vector
 646        (let ((vector (make-array len :element-type '(unsigned-byte 8))))
 647          (dotimes (i len)
 648            (setf (aref vector i)
 649                  (deref-array casted '(:array :unsigned-byte) i)))
 650          vector))
 651       (:bit-vector
 652        (let ((vector (make-array (ash len 3) :element-type 'bit)))
 653          (dotimes (i len)
 654            (let ((byte (deref-array casted '(:array :byte) i)))
 655              (dotimes (j 8)
 656                (setf (bit vector (+ (ash i 3) j))
 657                      (logand (ash byte (- j 7)) 1)))))
 658          vector)))))
 659
 660
 661 (defun read-data (data-ptr c-type sql-type out-len-ptr result-type)
 662   (declare (type long-ptr-type out-len-ptr))
 663   (let* ((out-len (deref-pointer out-len-ptr #.$ODBC-LONG-TYPE))
 664          (value
 665           (cond ((= out-len $SQL_NULL_DATA)
 666                  *null*)
 667                 (t
 668                  (case sql-type
 669                    ;; SQL extended datatypes
 670                    (#.$SQL_TINYINT  (get-cast-byte data-ptr))
 671                    (#.$SQL_C_STINYINT (get-cast-byte data-ptr)) ;; ?
 672                    (#.$SQL_C_SSHORT (get-cast-short data-ptr)) ;; ?
 673                    (#.$SQL_SMALLINT (get-cast-short data-ptr)) ;; ??
 674                    (#.$SQL_INTEGER (get-cast-int data-ptr))
 675                    (#.$SQL_BIGINT (get-cast-big data-ptr))
 676                    (#.$SQL_DECIMAL
 677                     (let ((*read-base* 10))
 678                       (read-from-string (get-cast-foreign-string data-ptr))))
 679                    (#.$SQL_BIT (get-cast-byte data-ptr))
 680                    (t
 681                     (case c-type
 682                       ((#.$SQL_C_DATE #.$SQL_C_TYPE_DATE)
 683                        (funcall *time-conversion-function* (date-to-universal-time data-ptr)))
 684                       ((#.$SQL_C_TIME #.$SQL_C_TYPE_TIME)
 685                        (multiple-value-bind (universal-time frac) (time-to-universal-time data-ptr)
 686                          (funcall *time-conversion-function* universal-time frac)))
 687                       ((#.$SQL_C_TIMESTAMP #.$SQL_C_TYPE_TIMESTAMP)
 688                        (multiple-value-bind (universal-time frac) (timestamp-to-universal-time data-ptr)
 689                          (funcall *time-conversion-function* universal-time frac)))
 690                       (#.$SQL_INTEGER
 691                        (get-cast-int data-ptr))
 692                       (#.$SQL_C_FLOAT
 693                        (get-cast-single-float data-ptr))
 694                       (#.$SQL_C_DOUBLE
 695                        (get-cast-double-float data-ptr))
 696                       (#.$SQL_C_SLONG
 697                        (get-cast-long data-ptr))
 698                       #+lispworks
 699                       (#.$SQL_C_BIT     ; encountered only in Access
 700                        (get-cast-byte data-ptr))
 701                       (#.$SQL_C_BINARY
 702                        (get-cast-binary data-ptr out-len *binary-format*))
 703                       ((#.$SQL_C_SSHORT #.$SQL_C_STINYINT) ; LMH short ints
 704                        (get-cast-short data-ptr)) ; LMH
 705                       (#.$SQL_C_SBIGINT (get-cast-big data-ptr))
 706                       #+ignore
 707                       (#.$SQL_C_CHAR
 708                        (code-char (get-cast-short data-ptr)))
 709                       (t
 710                        (get-cast-foreign-string data-ptr)))))))))
 711
 712     ;; FIXME: this could be better optimized for types which use READ-FROM-STRING above
 713
 714     (if (and (or (eq result-type t) (eq result-type :string))
 715              value
 716              (not (stringp value)))
 717         (write-to-string value)
 718       value)))
 719
 720 ;; which value is appropriate?
 721 (defparameter +max-precision+  4001)
 722
 723 (defvar *break-on-unknown-data-type* t)
 724
 725 ;; C. Stacy's idea to factor this out
 726 ;; "Make it easy to add new datatypes by making new subroutine %ALLOCATE-BINDINGS,
 727 ;; so that I don't have to remember to make changes in more than one place.
 728 ;; Just keep it in synch with READ-DATA."
 729 (defun %allocate-bindings (sql-type precision)
 730   (let* ((c-type (sql-to-c-type sql-type))
 731          (size (if (zerop precision)
 732                    +max-precision+ ;; if the precision cannot be determined
 733                  (min precision +max-precision+)))
 734          (long-p (= size +max-precision+))
 735          (data-ptr
 736           (case c-type ;; add more?
 737             (#.$SQL_C_SLONG (uffi:allocate-foreign-object #.$ODBC-LONG-TYPE))
 738             ((#.$SQL_C_DATE #.$SQL_C_TYPE_DATE) (allocate-foreign-object 'sql-c-date))
 739             ((#.$SQL_C_TIME #.$SQL_C_TYPE_TIME) (allocate-foreign-object 'sql-c-time))
 740             ((#.$SQL_C_TIMESTAMP #.$SQL_C_TYPE_TIMESTAMP) (allocate-foreign-object 'sql-c-timestamp))
 741             (#.$SQL_C_FLOAT (uffi:allocate-foreign-object :float))
 742             (#.$SQL_C_DOUBLE (uffi:allocate-foreign-object :double))
 743             (#.$SQL_C_BIT (uffi:allocate-foreign-object :byte))
 744             (#.$SQL_C_STINYINT (uffi:allocate-foreign-object :byte))
 745             (#.$SQL_C_SBIGINT (uffi:allocate-foreign-object #.$ODBC-BIG-TYPE))
 746             (#.$SQL_C_SSHORT (uffi:allocate-foreign-object :short))
 747             (#.$SQL_C_CHAR (uffi:allocate-foreign-string (1+ size)))
 748             (#.$SQL_C_BINARY (uffi:allocate-foreign-string (1+ (* 2 size))))
 749             (t
 750                 ;; Maybe should signal a restartable condition for this?
 751                 (when *break-on-unknown-data-type*
 752                   (break "SQL type is ~A, precision ~D, size ~D, C type is ~A"
 753                          sql-type precision size c-type))
 754                 (uffi:allocate-foreign-object :byte (1+ size)))))
 755          (out-len-ptr (uffi:allocate-foreign-object #.$ODBC-LONG-TYPE)))
 756     (values c-type data-ptr out-len-ptr size long-p)))
 757
 758 (defun fetch-all-rows (hstmt &key free-option flatp)
 759   (let ((column-count (result-columns-count hstmt)))
 760     (unless (zerop column-count)
 761       (let ((names (make-array column-count))
 762             (sql-types (make-array column-count :element-type 'fixnum))
 763             (c-types (make-array column-count :element-type 'fixnum))
 764             (precisions (make-array column-count :element-type 'fixnum))
 765             (data-ptrs (make-array column-count :initial-element nil))
 766             (out-len-ptrs (make-array column-count :initial-element nil))
 767             (scales (make-array column-count :element-type 'fixnum))
 768             (nullables-p (make-array column-count :element-type 'fixnum)))
 769         (unwind-protect
 770           (values
 771            (progn
 772              (dotimes (col-nr column-count)
 773                ;; get column information
 774                (multiple-value-bind (name sql-type precision scale nullable-p)
 775                                     (%describe-column hstmt (1+ col-nr))
 776                  ;; allocate space to bind result rows to
 777                  (multiple-value-bind (c-type data-ptr out-len-ptr)
 778                      (%allocate-bindings sql-type precision)
 779                    (%bind-column hstmt col-nr c-type data-ptr (1+ precision) out-len-ptr)
 780                    (setf (svref names col-nr) name
 781                          (aref sql-types col-nr) sql-type
 782                          (aref c-types col-nr) (sql-to-c-type sql-type)
 783                          (aref precisions col-nr) (if (zerop precision) 0 precision)
 784                          (aref scales col-nr) scale
 785                          (aref nullables-p col-nr) nullable-p
 786                          (aref data-ptrs col-nr) data-ptr
 787                          (aref out-len-ptrs col-nr) out-len-ptr))))
 788              ;; the main loop
 789              (prog1
 790                (cond (flatp
 791                       (when (> column-count 1)
 792                         (error 'clsql:sql-database-error
 793                                :message "If more than one column is to be fetched, flatp has to be nil."))
 794                       (loop until (= (%sql-fetch hstmt) $SQL_NO_DATA_FOUND)
 795                             collect
 796                             (read-data (aref data-ptrs 0)
 797                                        (aref c-types 0)
 798                                        (aref sql-types 0)
 799                                        (aref out-len-ptrs 0)
 800                                        t)))
 801                      (t
 802                       (loop until (= (%sql-fetch hstmt) $SQL_NO_DATA_FOUND)
 803                             collect
 804                             (loop for col-nr from 0 to (1- column-count)
 805                                   collect
 806                                   (read-data (aref data-ptrs col-nr)
 807                                              (aref c-types col-nr)
 808                                              (aref sql-types col-nr)
 809                                              (aref out-len-ptrs col-nr)
 810                                              t)))))))
 811            names)
 812           ;; dispose of memory etc
 813           (when free-option (%free-statement hstmt free-option))
 814           (dotimes (col-nr column-count)
 815             (let ((data-ptr (aref data-ptrs col-nr))
 816                   (out-len-ptr (aref out-len-ptrs col-nr)))
 817               (when data-ptr (free-foreign-object data-ptr)) ; we *did* allocate them
 818               (when out-len-ptr (free-foreign-object out-len-ptr)))))))))
 819
 820 ;; to do: factor out common parts, put the sceleton (the obligatory macro part)
 821 ;; of %do-fetch into sql package (has been done)
 822
 823 (defun %sql-prepare (hstmt sql)
 824   (with-cstring (sql-ptr sql)
 825     (with-error-handling (:hstmt hstmt)
 826       (SQLPrepare hstmt sql-ptr $SQL_NTS))))
 827
 828 ;; depending on option, we return a long int or a string; string not implemented
 829 (defun get-connection-option (hdbc option)
 830   (with-foreign-object (param-ptr #.$ODBC-LONG-TYPE)
 831     (with-error-handling (:hdbc hdbc)
 832                          (SQLGetConnectOption hdbc option param-ptr)
 833       (deref-pointer param-ptr #.$ODBC-LONG-TYPE))))
 834
 835 (defun set-connection-option (hdbc option param)
 836   (with-error-handling (:hdbc hdbc)
 837     (SQLSetConnectOption hdbc option param)))
 838
 839 (defun disable-autocommit (hdbc)
 840   (set-connection-option hdbc $SQL_AUTOCOMMIT $SQL_AUTOCOMMIT_OFF))
 841
 842 (defun enable-autocommit (hdbc)
 843   (set-connection-option hdbc $SQL_AUTOCOMMIT $SQL_AUTOCOMMIT_ON))
 844
 845 (defun %sql-set-pos (hstmt row option lock)
 846   (with-error-handling
 847     (:hstmt hstmt)
 848     (SQLSetPos hstmt row option lock)))
 849
 850 (defun %sql-extended-fetch (hstmt fetch-type row)
 851   (with-foreign-objects ((row-count-ptr #.$ODBC-ULONG-TYPE)
 852                          (row-status-ptr :short))
 853     (with-error-handling (:hstmt hstmt)
 854       (SQLExtendedFetch hstmt fetch-type row row-count-ptr
 855                         row-status-ptr)
 856       (values (deref-pointer row-count-ptr #.$ODBC-ULONG-TYPE)
 857               (deref-pointer row-status-ptr :short)))))
 858
 859 ; column-nr is zero-based
 860 (defun %sql-get-data (hstmt column-nr c-type data-ptr precision out-len-ptr)
 861   (with-error-handling
 862     (:hstmt hstmt :print-info nil)
 863     (SQLGetData hstmt (if (eq column-nr :bookmark) 0 (1+ column-nr))
 864                 c-type data-ptr precision out-len-ptr)))
 865
 866 (defun %sql-param-data (hstmt param-ptr)
 867   (with-error-handling (:hstmt hstmt :print-info t) ;; nil
 868       (SQLParamData hstmt param-ptr)))
 869
 870 (defun %sql-put-data (hstmt data-ptr size)
 871   (with-error-handling
 872     (:hstmt hstmt :print-info t) ;; nil
 873     (SQLPutData hstmt data-ptr size)))
 874
 875 (defconstant $sql-data-truncated (intern "01004" :keyword))
 876
 877 (defun read-data-in-chunks (hstmt column-nr data-ptr c-type sql-type
 878                                       out-len-ptr result-type)
 879   (declare (type long-ptr-type out-len-ptr)
 880            (ignore result-type))
 881   (let* ((res (%sql-get-data hstmt column-nr c-type data-ptr
 882                              +max-precision+ out-len-ptr))
 883          (out-len (deref-pointer out-len-ptr #.$ODBC-LONG-TYPE))
 884          (offset 0)
 885          (result (case out-len
 886                    (#.$SQL_NULL_DATA
 887                     (return-from read-data-in-chunks *null*))
 888                    (#.$SQL_NO_TOTAL ;; don't know how long it is going to be
 889                                     (let ((str (make-array 0 :element-type 'character :adjustable t)))
 890                                       (loop do (if (= c-type #.$SQL_CHAR)
 891                                                    (let ((data-length (foreign-string-length data-ptr)))
 892                                                      (adjust-array str (+ offset data-length)
 893                                                                    :initial-element #\?)
 894                                                      (setf offset (%cstring-into-vector
 895                                                                    data-ptr str
 896                                                                    offset
 897                                                                    data-length)))
 898                                                  (error 'clsql:sql-database-error :message "wrong type. preliminary."))
 899                                             while (and (= res $SQL_SUCCESS_WITH_INFO)
 900                                                        (equal (sql-state +null-handle-ptr+ +null-handle-ptr+ hstmt)
 901                                                               "01004"))
 902                                             do (setf res (%sql-get-data hstmt column-nr c-type data-ptr
 903                                                                         +max-precision+ out-len-ptr)))
 904                                       (setf str (coerce str 'string))
 905                                       (if (= sql-type $SQL_DECIMAL)
 906                                           (let ((*read-base* 10))
 907                                             (read-from-string str))
 908                                         str)))
 909                     (otherwise
 910                     (let ((str)
 911                           (offset 0)
 912                           (octets (make-array out-len :element-type '(unsigned-byte 8) :initial-element 0)))
 913                       (loop
 914                          do
 915                              (loop for i from 0 to (1- (min out-len +max-precision+))
 916                                 do (setf (aref octets (+ offset i)) (deref-array data-ptr '(:array :unsigned-byte) i))
 917                                 finally (incf offset (1- i)))
 918                          while
 919                            (and (= res $SQL_SUCCESS_WITH_INFO)
 920                                 (> out-len +max-precision+))
 921                          do
 922                            (setf res (%sql-get-data hstmt column-nr c-type data-ptr +max-precision+ out-len-ptr)
 923                                  out-len (deref-pointer out-len-ptr #.$ODBC-LONG-TYPE)))
 924                       (setf str (uffi:octets-to-string octets))
 925                       (if (= sql-type $SQL_DECIMAL)
 926                           (let ((*read-base* 10))
 927                             (read-from-string str))
 928                           str))))))
 929     (setf (deref-pointer out-len-ptr #.$ODBC-LONG-TYPE) #.$SQL_NO_TOTAL) ;; reset the out length for the next row
 930     result))
 931
 932 (def-type c-timestamp-ptr-type (* (:struct sql-c-timestamp)))
 933 (def-type c-time-ptr-type (* (:struct sql-c-time)))
 934 (def-type c-date-ptr-type (* (:struct sql-c-date)))
 935
 936 (defun timestamp-to-universal-time (ptr)
 937   (declare (type c-timestamp-ptr-type ptr))
 938   (values
 939    (encode-universal-time
 940     (get-slot-value ptr 'sql-c-timestamp 'second)
 941     (get-slot-value ptr 'sql-c-timestamp 'minute)
 942     (get-slot-value ptr 'sql-c-timestamp 'hour)
 943     (get-slot-value ptr 'sql-c-timestamp 'day)
 944     (get-slot-value ptr 'sql-c-timestamp 'month)
 945     (get-slot-value ptr 'sql-c-timestamp 'year))
 946    (get-slot-value ptr 'sql-c-timestamp 'fraction)))
 947
 948 (defun universal-time-to-timestamp (time &optional (fraction 0))
 949   "TODO: Dead function?"
 950   (multiple-value-bind (sec min hour day month year)
 951       (decode-universal-time time)
 952     (let ((ptr (allocate-foreign-object 'sql-c-timestamp)))
 953       (setf (get-slot-value ptr 'sql-c-timestamp 'second) sec
 954             (get-slot-value ptr 'sql-c-timestamp 'minute) min
 955             (get-slot-value ptr 'sql-c-timestamp 'hour) hour
 956             (get-slot-value ptr 'sql-c-timestamp 'day) day
 957             (get-slot-value ptr 'sql-c-timestamp 'month) month
 958             (get-slot-value ptr 'sql-c-timestamp 'year) year
 959             (get-slot-value ptr 'sql-c-timestamp 'fraction) fraction)
 960       ptr)))
 961
 962 (defun %put-timestamp (ptr time &optional (fraction 0))
 963   "TODO: Dead function?"
 964   (declare (type c-timestamp-ptr-type ptr))
 965   (multiple-value-bind (sec min hour day month year)
 966       (decode-universal-time time)
 967     (setf (get-slot-value ptr 'sql-c-timestamp 'second) sec
 968           (get-slot-value ptr 'sql-c-timestamp 'minute) min
 969           (get-slot-value ptr 'sql-c-timestamp 'hour) hour
 970           (get-slot-value ptr 'sql-c-timestamp 'day) day
 971           (get-slot-value ptr 'sql-c-timestamp 'month) month
 972           (get-slot-value ptr 'sql-c-timestamp 'year) year
 973           (get-slot-value ptr 'sql-c-timestamp 'fraction) fraction)
 974       ptr))
 975
 976 (defun date-to-universal-time (ptr)
 977   (declare (type c-date-ptr-type ptr))
 978   (encode-universal-time
 979    0 0 0
 980    (get-slot-value ptr 'sql-c-timestamp 'day)
 981    (get-slot-value ptr 'sql-c-timestamp 'month)
 982    (get-slot-value ptr 'sql-c-timestamp 'year)))
 983
 984 (defun time-to-universal-time (ptr)
 985   (declare (type c-time-ptr-type ptr))
 986   (encode-universal-time
 987    (get-slot-value ptr 'sql-c-timestamp 'second)
 988    (get-slot-value ptr 'sql-c-timestamp 'minute)
 989    (get-slot-value ptr 'sql-c-timestamp 'hour)
 990    1 1 0))
 991
 992
 993 ;;; Added by KMR
 994
 995 (defun %set-attr-odbc-version (henv version)
 996   (with-error-handling (:henv henv)
 997       ;;note that we are passing version as an integer that happens to be
 998       ;;stuffed into a pointer.
 999       ;;http://msdn.microsoft.com/en-us/library/ms709285%28v=VS.85%29.aspx
1000       (SQLSetEnvAttr henv $SQL_ATTR_ODBC_VERSION
1001                      (make-pointer version :void) 0)))
1002
1003 (defun %list-tables (hstmt)
1004   (with-error-handling (:hstmt hstmt)
1005     (SQLTables hstmt +null-ptr+ 0 +null-ptr+ 0 +null-ptr+ 0 +null-ptr+ 0)))
1006
1007 (defun %table-statistics (table hstmt &key unique (ensure t))
1008   (with-cstrings ((table-cs table))
1009     (with-error-handling (:hstmt hstmt)
1010       (SQLStatistics
1011        hstmt
1012        +null-ptr+ 0
1013        +null-ptr+ 0
1014        table-cs $SQL_NTS
1015        (if unique $SQL_INDEX_UNIQUE $SQL_INDEX_ALL)
1016        (if ensure $SQL_ENSURE $SQL_QUICK)))))
1017
1018 (defun %list-data-sources (henv)
1019   (let ((results nil))
1020     (with-foreign-strings ((dsn-ptr (1+ $SQL_MAX_DSN_LENGTH))
1021                            (desc-ptr 256))
1022       (with-foreign-objects ((dsn-len :short)
1023                              (desc-len :short))
1024        (let ((res (with-error-handling (:henv henv)
1025                       (SQLDataSources henv $SQL_FETCH_FIRST dsn-ptr
1026                                       (1+ $SQL_MAX_DSN_LENGTH)
1027                                       dsn-len desc-ptr 256 desc-len))))
1028          (when (or (eql res $SQL_SUCCESS)
1029                    (eql res $SQL_SUCCESS_WITH_INFO))
1030            (push (convert-from-foreign-string dsn-ptr) results))
1031
1032          (do ((res (with-error-handling (:henv henv)
1033                        (SQLDataSources henv $SQL_FETCH_NEXT dsn-ptr
1034                                        (1+ $SQL_MAX_DSN_LENGTH)
1035                                        dsn-len desc-ptr 256 desc-len))
1036                    (with-error-handling (:henv henv)
1037                        (SQLDataSources henv $SQL_FETCH_NEXT dsn-ptr
1038                                        (1+ $SQL_MAX_DSN_LENGTH)
1039                                        dsn-len desc-ptr 256 desc-len))))
1040              ((not (or (eql res $SQL_SUCCESS)
1041                        (eql res $SQL_SUCCESS_WITH_INFO))))
1042            (push (convert-from-foreign-string dsn-ptr) results)))))
1043     (nreverse results)))