lib/adodb/drivers/adodb-odbc.inc.php

   1 <?php
   2 /*
   3 V4.98 13 Feb 2008  (c) 2000-2008 John Lim (jlim#natsoft.com.my). All rights reserved.
   4   Released under both BSD license and Lesser GPL library license.
   5   Whenever there is any discrepancy between the two licenses,
   6   the BSD license will take precedence.
   7 Set tabs to 4 for best viewing.
   8
   9   Latest version is available at http://adodb.sourceforge.net
  10
  11   Requires ODBC. Works on Windows and Unix.
  12 */
  13 // security - hide paths
  14 if (!defined('ADODB_DIR')) die();
  15
  16   define("_ADODB_ODBC_LAYER", 2 );
  17
  18 /*--------------------------------------------------------------------------------------
  19 --------------------------------------------------------------------------------------*/
  20
  21
  22 class ADODB_odbc extends ADOConnection {
  23         var $databaseType = "odbc";
  24         var $fmtDate = "'Y-m-d'";
  25         var $fmtTimeStamp = "'Y-m-d, h:i:sA'";
  26         var $replaceQuote = "''"; // string to use to replace quotes
  27         var $dataProvider = "odbc";
  28         var $hasAffectedRows = true;
  29         var $binmode = ODBC_BINMODE_RETURN;
  30         var $useFetchArray = false; // setting this to true will make array elements in FETCH_ASSOC mode case-sensitive
  31                                                                 // breaking backward-compat
  32         //var $longreadlen = 8000; // default number of chars to return for a Blob/Long field
  33         var $_bindInputArray = false;
  34         var $curmode = SQL_CUR_USE_DRIVER; // See sqlext.h, SQL_CUR_DEFAULT == SQL_CUR_USE_DRIVER == 2L
  35         var $_genSeqSQL = "create table %s (id integer)";
  36         var $_autocommit = true;
  37         var $_haserrorfunctions = true;
  38         var $_has_stupid_odbc_fetch_api_change = true;
  39         var $_lastAffectedRows = 0;
  40         var $uCaseTables = true; // for meta* functions, uppercase table names
  41
  42         function ADODB_odbc()
  43         {
  44                 $this->_haserrorfunctions = ADODB_PHPVER >= 0x4050;
  45                 $this->_has_stupid_odbc_fetch_api_change = ADODB_PHPVER >= 0x4200;
  46         }
  47
  48                 // returns true or false
  49         function _connect($argDSN, $argUsername, $argPassword, $argDatabasename)
  50         {
  51         global $php_errormsg;
  52
  53                 if (!function_exists('odbc_connect')) return null;
  54
  55                 if ($this->debug && $argDatabasename && $this->databaseType != 'vfp') {
  56                         ADOConnection::outp("For odbc Connect(), $argDatabasename is not used. Place dsn in 1st parameter.");
  57                 }
  58                 if (isset($php_errormsg)) $php_errormsg = '';
  59                 if ($this->curmode === false) $this->_connectionID = odbc_connect($argDSN,$argUsername,$argPassword);
  60                 else $this->_connectionID = odbc_connect($argDSN,$argUsername,$argPassword,$this->curmode);
  61                 $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
  62                 if (isset($this->connectStmt)) $this->Execute($this->connectStmt);
  63
  64                 return $this->_connectionID != false;
  65         }
  66
  67         // returns true or false
  68         function _pconnect($argDSN, $argUsername, $argPassword, $argDatabasename)
  69         {
  70         global $php_errormsg;
  71
  72                 if (!function_exists('odbc_connect')) return null;
  73
  74                 if (isset($php_errormsg)) $php_errormsg = '';
  75                 $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
  76                 if ($this->debug && $argDatabasename) {
  77                         ADOConnection::outp("For odbc PConnect(), $argDatabasename is not used. Place dsn in 1st parameter.");
  78                 }
  79         //      print "dsn=$argDSN u=$argUsername p=$argPassword<br>"; flush();
  80                 if ($this->curmode === false) $this->_connectionID = odbc_connect($argDSN,$argUsername,$argPassword);
  81                 else $this->_connectionID = odbc_pconnect($argDSN,$argUsername,$argPassword,$this->curmode);
  82
  83                 $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
  84                 if ($this->_connectionID && $this->autoRollback) @odbc_rollback($this->_connectionID);
  85                 if (isset($this->connectStmt)) $this->Execute($this->connectStmt);
  86
  87                 return $this->_connectionID != false;
  88         }
  89
  90
  91         function ServerInfo()
  92         {
  93
  94                 if (!empty($this->host) && ADODB_PHPVER >= 0x4300) {
  95                         $dsn = strtoupper($this->host);
  96                         $first = true;
  97                         $found = false;
  98
  99                         if (!function_exists('odbc_data_source')) return false;
 100
 101                         while(true) {
 102
 103                                 $rez = @odbc_data_source($this->_connectionID,
 104                                         $first ? SQL_FETCH_FIRST : SQL_FETCH_NEXT);
 105                                 $first = false;
 106                                 if (!is_array($rez)) break;
 107                                 if (strtoupper($rez['server']) == $dsn) {
 108                                         $found = true;
 109                                         break;
 110                                 }
 111                         }
 112                         if (!$found) return ADOConnection::ServerInfo();
 113                         if (!isset($rez['version'])) $rez['version'] = '';
 114                         return $rez;
 115                 } else {
 116                         return ADOConnection::ServerInfo();
 117                 }
 118         }
 119
 120
 121         function CreateSequence($seqname='adodbseq',$start=1)
 122         {
 123                 if (empty($this->_genSeqSQL)) return false;
 124                 $ok = $this->Execute(sprintf($this->_genSeqSQL,$seqname));
 125                 if (!$ok) return false;
 126                 $start -= 1;
 127                 return $this->Execute("insert into $seqname values($start)");
 128         }
 129
 130         var $_dropSeqSQL = 'drop table %s';
 131         function DropSequence($seqname)
 132         {
 133                 if (empty($this->_dropSeqSQL)) return false;
 134                 return $this->Execute(sprintf($this->_dropSeqSQL,$seqname));
 135         }
 136
 137         /*
 138                 This algorithm is not very efficient, but works even if table locking
 139                 is not available.
 140
 141                 Will return false if unable to generate an ID after $MAXLOOPS attempts.
 142         */
 143         function GenID($seq='adodbseq',$start=1)
 144         {
 145                 // if you have to modify the parameter below, your database is overloaded,
 146                 // or you need to implement generation of id's yourself!
 147                 $MAXLOOPS = 100;
 148                 //$this->debug=1;
 149                 while (--$MAXLOOPS>=0) {
 150                         $num = $this->GetOne("select id from $seq");
 151                         if ($num === false) {
 152                                 $this->Execute(sprintf($this->_genSeqSQL ,$seq));
 153                                 $start -= 1;
 154                                 $num = '0';
 155                                 $ok = $this->Execute("insert into $seq values($start)");
 156                                 if (!$ok) return false;
 157                         }
 158                         $this->Execute("update $seq set id=id+1 where id=$num");
 159
 160                         if ($this->affected_rows() > 0) {
 161                                 $num += 1;
 162                                 $this->genID = $num;
 163                                 return $num;
 164                         }
 165                 }
 166                 if ($fn = $this->raiseErrorFn) {
 167                         $fn($this->databaseType,'GENID',-32000,"Unable to generate unique id after $MAXLOOPS attempts",$seq,$num);
 168                 }
 169                 return false;
 170         }
 171
 172
 173         function ErrorMsg()
 174         {
 175                 if ($this->_haserrorfunctions) {
 176                         if ($this->_errorMsg !== false) return $this->_errorMsg;
 177                         if (empty($this->_connectionID)) return @odbc_errormsg();
 178                         return @odbc_errormsg($this->_connectionID);
 179                 } else return ADOConnection::ErrorMsg();
 180         }
 181
 182         function ErrorNo()
 183         {
 184
 185                 if ($this->_haserrorfunctions) {
 186                         if ($this->_errorCode !== false) {
 187                                 // bug in 4.0.6, error number can be corrupted string (should be 6 digits)
 188                                 return (strlen($this->_errorCode)<=2) ? 0 : $this->_errorCode;
 189                         }
 190
 191                         if (empty($this->_connectionID)) $e = @odbc_error();
 192                         else $e = @odbc_error($this->_connectionID);
 193
 194                          // bug in 4.0.6, error number can be corrupted string (should be 6 digits)
 195                          // so we check and patch
 196                         if (strlen($e)<=2) return 0;
 197                         return $e;
 198                 } else return ADOConnection::ErrorNo();
 199         }
 200
 201
 202
 203         function BeginTrans()
 204         {
 205                 if (!$this->hasTransactions) return false;
 206                 if ($this->transOff) return true;
 207                 $this->transCnt += 1;
 208                 $this->_autocommit = false;
 209                 return odbc_autocommit($this->_connectionID,false);
 210         }
 211
 212         function CommitTrans($ok=true)
 213         {
 214                 if ($this->transOff) return true;
 215                 if (!$ok) return $this->RollbackTrans();
 216                 if ($this->transCnt) $this->transCnt -= 1;
 217                 $this->_autocommit = true;
 218                 $ret = odbc_commit($this->_connectionID);
 219                 odbc_autocommit($this->_connectionID,true);
 220                 return $ret;
 221         }
 222
 223         function RollbackTrans()
 224         {
 225                 if ($this->transOff) return true;
 226                 if ($this->transCnt) $this->transCnt -= 1;
 227                 $this->_autocommit = true;
 228                 $ret = odbc_rollback($this->_connectionID);
 229                 odbc_autocommit($this->_connectionID,true);
 230                 return $ret;
 231         }
 232
 233         function MetaPrimaryKeys($table)
 234         {
 235         global $ADODB_FETCH_MODE;
 236
 237                 if ($this->uCaseTables) $table = strtoupper($table);
 238                 $schema = '';
 239                 $this->_findschema($table,$schema);
 240
 241                 $savem = $ADODB_FETCH_MODE;
 242                 $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
 243                 $qid = @odbc_primarykeys($this->_connectionID,'',$schema,$table);
 244
 245                 if (!$qid) {
 246                         $ADODB_FETCH_MODE = $savem;
 247                         return false;
 248                 }
 249                 $rs = new ADORecordSet_odbc($qid);
 250                 $ADODB_FETCH_MODE = $savem;
 251
 252                 if (!$rs) return false;
 253                 $rs->_has_stupid_odbc_fetch_api_change = $this->_has_stupid_odbc_fetch_api_change;
 254
 255                 $arr =& $rs->GetArray();
 256                 $rs->Close();
 257                 //print_r($arr);
 258                 $arr2 = array();
 259                 for ($i=0; $i < sizeof($arr); $i++) {
 260                         if ($arr[$i][3]) $arr2[] = $arr[$i][3];
 261                 }
 262                 return $arr2;
 263         }
 264
 265
 266
 267         function &MetaTables($ttype=false)
 268         {
 269         global $ADODB_FETCH_MODE;
 270
 271                 $savem = $ADODB_FETCH_MODE;
 272                 $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
 273                 $qid = odbc_tables($this->_connectionID);
 274
 275                 $rs = new ADORecordSet_odbc($qid);
 276
 277                 $ADODB_FETCH_MODE = $savem;
 278                 if (!$rs) {
 279                         $false = false;
 280                         return $false;
 281                 }
 282                 $rs->_has_stupid_odbc_fetch_api_change = $this->_has_stupid_odbc_fetch_api_change;
 283
 284                 $arr =& $rs->GetArray();
 285                 //print_r($arr);
 286
 287                 $rs->Close();
 288                 $arr2 = array();
 289
 290                 if ($ttype) {
 291                         $isview = strncmp($ttype,'V',1) === 0;
 292                 }
 293                 for ($i=0; $i < sizeof($arr); $i++) {
 294                         if (!$arr[$i][2]) continue;
 295                         $type = $arr[$i][3];
 296                         if ($ttype) {
 297                                 if ($isview) {
 298                                         if (strncmp($type,'V',1) === 0) $arr2[] = $arr[$i][2];
 299                                 } else if (strncmp($type,'SYS',3) !== 0) $arr2[] = $arr[$i][2];
 300                         } else if (strncmp($type,'SYS',3) !== 0) $arr2[] = $arr[$i][2];
 301                 }
 302                 return $arr2;
 303         }
 304
 305 /*
 306 See http://msdn.microsoft.com/library/default.asp?url=/library/en-us/odbc/htm/odbcdatetime_data_type_changes.asp
 307 / SQL data type codes /
 308 #define SQL_UNKNOWN_TYPE        0
 309 #define SQL_CHAR                        1
 310 #define SQL_NUMERIC              2
 311 #define SQL_DECIMAL              3
 312 #define SQL_INTEGER              4
 313 #define SQL_SMALLINT            5
 314 #define SQL_FLOAT                  6
 315 #define SQL_REAL                        7
 316 #define SQL_DOUBLE                8
 317 #if (ODBCVER >= 0x0300)
 318 #define SQL_DATETIME            9
 319 #endif
 320 #define SQL_VARCHAR             12
 321
 322
 323 / One-parameter shortcuts for date/time data types /
 324 #if (ODBCVER >= 0x0300)
 325 #define SQL_TYPE_DATE     91
 326 #define SQL_TYPE_TIME     92
 327 #define SQL_TYPE_TIMESTAMP 93
 328
 329 #define SQL_UNICODE                             (-95)
 330 #define SQL_UNICODE_VARCHAR                     (-96)
 331 #define SQL_UNICODE_LONGVARCHAR                 (-97)
 332 */
 333         function ODBCTypes($t)
 334         {
 335                 switch ((integer)$t) {
 336                 case 1:
 337                 case 12:
 338                 case 0:
 339                 case -95:
 340                 case -96:
 341                         return 'C';
 342                 case -97:
 343                 case -1: //text
 344                         return 'X';
 345                 case -4: //image
 346                         return 'B';
 347
 348                 case 9:
 349                 case 91:
 350                         return 'D';
 351
 352                 case 10:
 353                 case 11:
 354                 case 92:
 355                 case 93:
 356                         return 'T';
 357
 358                 case 4:
 359                 case 5:
 360                 case -6:
 361                         return 'I';
 362
 363                 case -11: // uniqidentifier
 364                         return 'R';
 365                 case -7: //bit
 366                         return 'L';
 367
 368                 default:
 369                         return 'N';
 370                 }
 371         }
 372
 373         function &MetaColumns($table)
 374         {
 375         global $ADODB_FETCH_MODE;
 376
 377                 $false = false;
 378                 if ($this->uCaseTables) $table = strtoupper($table);
 379                 $schema = '';
 380                 $this->_findschema($table,$schema);
 381
 382                 $savem = $ADODB_FETCH_MODE;
 383                 $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
 384
 385                 /*if (false) { // after testing, confirmed that the following does not work becoz of a bug
 386                         $qid2 = odbc_tables($this->_connectionID);
 387                         $rs = new ADORecordSet_odbc($qid2);
 388                         $ADODB_FETCH_MODE = $savem;
 389                         if (!$rs) return false;
 390                         $rs->_has_stupid_odbc_fetch_api_change = $this->_has_stupid_odbc_fetch_api_change;
 391                         $rs->_fetch();
 392
 393                         while (!$rs->EOF) {
 394                                 if ($table == strtoupper($rs->fields[2])) {
 395                                         $q = $rs->fields[0];
 396                                         $o = $rs->fields[1];
 397                                         break;
 398                                 }
 399                                 $rs->MoveNext();
 400                         }
 401                         $rs->Close();
 402
 403                         $qid = odbc_columns($this->_connectionID,$q,$o,strtoupper($table),'%');
 404                 } */
 405
 406                 switch ($this->databaseType) {
 407                 case 'access':
 408                 case 'vfp':
 409                         $qid = odbc_columns($this->_connectionID);#,'%','',strtoupper($table),'%');
 410                         break;
 411
 412
 413                 case 'db2':
 414             $colname = "%";
 415             $qid = odbc_columns($this->_connectionID, "", $schema, $table, $colname);
 416             break;
 417
 418                 default:
 419                         $qid = @odbc_columns($this->_connectionID,'%','%',strtoupper($table),'%');
 420                         if (empty($qid)) $qid = odbc_columns($this->_connectionID);
 421                         break;
 422                 }
 423                 if (empty($qid)) return $false;
 424
 425                 $rs =& new ADORecordSet_odbc($qid);
 426                 $ADODB_FETCH_MODE = $savem;
 427
 428                 if (!$rs) return $false;
 429                 $rs->_has_stupid_odbc_fetch_api_change = $this->_has_stupid_odbc_fetch_api_change;
 430                 $rs->_fetch();
 431
 432                 $retarr = array();
 433
 434                 /*
 435                 $rs->fields indices
 436                 0 TABLE_QUALIFIER
 437                 1 TABLE_SCHEM
 438                 2 TABLE_NAME
 439                 3 COLUMN_NAME
 440                 4 DATA_TYPE
 441                 5 TYPE_NAME
 442                 6 PRECISION
 443                 7 LENGTH
 444                 8 SCALE
 445                 9 RADIX
 446                 10 NULLABLE
 447                 11 REMARKS
 448                 */
 449                 while (!$rs->EOF) {
 450                 //      adodb_pr($rs->fields);
 451                         if (strtoupper(trim($rs->fields[2])) == $table && (!$schema || strtoupper($rs->fields[1]) == $schema)) {
 452                                 $fld = new ADOFieldObject();
 453                                 $fld->name = $rs->fields[3];
 454                                 $fld->type = $this->ODBCTypes($rs->fields[4]);
 455
 456                                 // ref: http://msdn.microsoft.com/library/default.asp?url=/archive/en-us/dnaraccgen/html/msdn_odk.asp
 457                                 // access uses precision to store length for char/varchar
 458                                 if ($fld->type == 'C' or $fld->type == 'X') {
 459                                         if ($this->databaseType == 'access')
 460                                                 $fld->max_length = $rs->fields[6];
 461                                         else if ($rs->fields[4] <= -95) // UNICODE
 462                                                 $fld->max_length = $rs->fields[7]/2;
 463                                         else
 464                                                 $fld->max_length = $rs->fields[7];
 465                                 } else
 466                                         $fld->max_length = $rs->fields[7];
 467                                 $fld->not_null = !empty($rs->fields[10]);
 468                                 $fld->scale = $rs->fields[8];
 469                                 $retarr[strtoupper($fld->name)] = $fld;
 470                         } else if (sizeof($retarr)>0)
 471                                 break;
 472                         $rs->MoveNext();
 473                 }
 474                 $rs->Close(); //-- crashes 4.03pl1 -- why?
 475
 476                 if (empty($retarr)) $retarr = false;
 477                 return $retarr;
 478         }
 479
 480         function Prepare($sql)
 481         {
 482                 if (! $this->_bindInputArray) return $sql; // no binding
 483                 $stmt = odbc_prepare($this->_connectionID,$sql);
 484                 if (!$stmt) {
 485                         // we don't know whether odbc driver is parsing prepared stmts, so just return sql
 486                         return $sql;
 487                 }
 488                 return array($sql,$stmt,false);
 489         }
 490
 491         /* returns queryID or false */
 492         function _query($sql,$inputarr=false)
 493         {
 494         GLOBAL $php_errormsg;
 495                 if (isset($php_errormsg)) $php_errormsg = '';
 496                 $this->_error = '';
 497
 498                 if ($inputarr) {
 499                         if (is_array($sql)) {
 500                                 $stmtid = $sql[1];
 501                         } else {
 502                                 $stmtid = odbc_prepare($this->_connectionID,$sql);
 503
 504                                 if ($stmtid == false) {
 505                                         $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
 506                                         return false;
 507                                 }
 508                         }
 509
 510                         if (! odbc_execute($stmtid,$inputarr)) {
 511                                 //@odbc_free_result($stmtid);
 512                                 if ($this->_haserrorfunctions) {
 513                                         $this->_errorMsg = odbc_errormsg();
 514                                         $this->_errorCode = odbc_error();
 515                                 }
 516                                 return false;
 517                         }
 518
 519                 } else if (is_array($sql)) {
 520                         $stmtid = $sql[1];
 521                         if (!odbc_execute($stmtid)) {
 522                                 //@odbc_free_result($stmtid);
 523                                 if ($this->_haserrorfunctions) {
 524                                         $this->_errorMsg = odbc_errormsg();
 525                                         $this->_errorCode = odbc_error();
 526                                 }
 527                                 return false;
 528                         }
 529                 } else
 530                         $stmtid = odbc_exec($this->_connectionID,$sql);
 531
 532                 $this->_lastAffectedRows = 0;
 533                 if ($stmtid) {
 534                         if (@odbc_num_fields($stmtid) == 0) {
 535                                 $this->_lastAffectedRows = odbc_num_rows($stmtid);
 536                                 $stmtid = true;
 537                         } else {
 538                                 $this->_lastAffectedRows = 0;
 539                                 odbc_binmode($stmtid,$this->binmode);
 540                                 odbc_longreadlen($stmtid,$this->maxblobsize);
 541                         }
 542
 543                         if ($this->_haserrorfunctions) {
 544                                 $this->_errorMsg = '';
 545                                 $this->_errorCode = 0;
 546                         } else
 547                                 $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
 548                 } else {
 549                         if ($this->_haserrorfunctions) {
 550                                 $this->_errorMsg = odbc_errormsg();
 551                                 $this->_errorCode = odbc_error();
 552                         } else
 553                                 $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
 554                 }
 555                 return $stmtid;
 556         }
 557
 558         /*
 559                 Insert a null into the blob field of the table first.
 560                 Then use UpdateBlob to store the blob.
 561
 562                 Usage:
 563
 564                 $conn->Execute('INSERT INTO blobtable (id, blobcol) VALUES (1, null)');
 565                 $conn->UpdateBlob('blobtable','blobcol',$blob,'id=1');
 566         */
 567         function UpdateBlob($table,$column,$val,$where,$blobtype='BLOB')
 568         {
 569                 return $this->Execute("UPDATE $table SET $column=? WHERE $where",array($val)) != false;
 570         }
 571
 572         // returns true or false
 573         function _close()
 574         {
 575                 $ret = @odbc_close($this->_connectionID);
 576                 $this->_connectionID = false;
 577                 return $ret;
 578         }
 579
 580         function _affectedrows()
 581         {
 582                 return $this->_lastAffectedRows;
 583         }
 584
 585 }
 586
 587 /*--------------------------------------------------------------------------------------
 588          Class Name: Recordset
 589 --------------------------------------------------------------------------------------*/
 590
 591 class ADORecordSet_odbc extends ADORecordSet {
 592
 593         var $bind = false;
 594         var $databaseType = "odbc";
 595         var $dataProvider = "odbc";
 596         var $useFetchArray;
 597         var $_has_stupid_odbc_fetch_api_change;
 598
 599         function ADORecordSet_odbc($id,$mode=false)
 600         {
 601                 if ($mode === false) {
 602                         global $ADODB_FETCH_MODE;
 603                         $mode = $ADODB_FETCH_MODE;
 604                 }
 605                 $this->fetchMode = $mode;
 606
 607                 $this->_queryID = $id;
 608
 609                 // the following is required for mysql odbc driver in 4.3.1 -- why?
 610                 $this->EOF = false;
 611                 $this->_currentRow = -1;
 612                 //$this->ADORecordSet($id);
 613         }
 614
 615
 616         // returns the field object
 617         function &FetchField($fieldOffset = -1)
 618         {
 619
 620                 $off=$fieldOffset+1; // offsets begin at 1
 621
 622                 $o= new ADOFieldObject();
 623                 $o->name = @odbc_field_name($this->_queryID,$off);
 624                 $o->type = @odbc_field_type($this->_queryID,$off);
 625                 $o->max_length = @odbc_field_len($this->_queryID,$off);
 626                 if (ADODB_ASSOC_CASE == 0) $o->name = strtolower($o->name);
 627                 else if (ADODB_ASSOC_CASE == 1) $o->name = strtoupper($o->name);
 628                 return $o;
 629         }
 630
 631         /* Use associative array to get fields array */
 632         function Fields($colname)
 633         {
 634                 if ($this->fetchMode & ADODB_FETCH_ASSOC) return $this->fields[$colname];
 635                 if (!$this->bind) {
 636                         $this->bind = array();
 637                         for ($i=0; $i < $this->_numOfFields; $i++) {
 638                                 $o = $this->FetchField($i);
 639                                 $this->bind[strtoupper($o->name)] = $i;
 640                         }
 641                 }
 642
 643                  return $this->fields[$this->bind[strtoupper($colname)]];
 644         }
 645
 646
 647         function _initrs()
 648         {
 649         global $ADODB_COUNTRECS;
 650                 $this->_numOfRows = ($ADODB_COUNTRECS) ? @odbc_num_rows($this->_queryID) : -1;
 651                 $this->_numOfFields = @odbc_num_fields($this->_queryID);
 652                 // some silly drivers such as db2 as/400 and intersystems cache return _numOfRows = 0
 653                 if ($this->_numOfRows == 0) $this->_numOfRows = -1;
 654                 //$this->useFetchArray = $this->connection->useFetchArray;
 655                 $this->_has_stupid_odbc_fetch_api_change = ADODB_PHPVER >= 0x4200;
 656         }
 657
 658         function _seek($row)
 659         {
 660                 return false;
 661         }
 662
 663         // speed up SelectLimit() by switching to ADODB_FETCH_NUM as ADODB_FETCH_ASSOC is emulated
 664         function &GetArrayLimit($nrows,$offset=-1)
 665         {
 666                 if ($offset <= 0) {
 667                         $rs =& $this->GetArray($nrows);
 668                         return $rs;
 669                 }
 670                 $savem = $this->fetchMode;
 671                 $this->fetchMode = ADODB_FETCH_NUM;
 672                 $this->Move($offset);
 673                 $this->fetchMode = $savem;
 674
 675                 if ($this->fetchMode & ADODB_FETCH_ASSOC) {
 676                         $this->fields =& $this->GetRowAssoc(ADODB_ASSOC_CASE);
 677                 }
 678
 679                 $results = array();
 680                 $cnt = 0;
 681                 while (!$this->EOF && $nrows != $cnt) {
 682                         $results[$cnt++] = $this->fields;
 683                         $this->MoveNext();
 684                 }
 685
 686                 return $results;
 687         }
 688
 689
 690         function MoveNext()
 691         {
 692                 if ($this->_numOfRows != 0 && !$this->EOF) {
 693                         $this->_currentRow++;
 694
 695                         if ($this->_has_stupid_odbc_fetch_api_change)
 696                                 $rez = @odbc_fetch_into($this->_queryID,$this->fields);
 697                         else {
 698                                 $row = 0;
 699                                 $rez = @odbc_fetch_into($this->_queryID,$row,$this->fields);
 700                         }
 701                         if ($rez) {
 702                                 if ($this->fetchMode & ADODB_FETCH_ASSOC) {
 703                                         $this->fields =& $this->GetRowAssoc(ADODB_ASSOC_CASE);
 704                                 }
 705                                 return true;
 706                         }
 707                 }
 708                 $this->fields = false;
 709                 $this->EOF = true;
 710                 return false;
 711         }
 712
 713         function _fetch()
 714         {
 715
 716                 if ($this->_has_stupid_odbc_fetch_api_change)
 717                         $rez = @odbc_fetch_into($this->_queryID,$this->fields);
 718                 else {
 719                         $row = 0;
 720                         $rez = @odbc_fetch_into($this->_queryID,$row,$this->fields);
 721                 }
 722                 if ($rez) {
 723                         if ($this->fetchMode & ADODB_FETCH_ASSOC) {
 724                                 $this->fields =& $this->GetRowAssoc(ADODB_ASSOC_CASE);
 725                         }
 726                         return true;
 727                 }
 728                 $this->fields = false;
 729                 return false;
 730         }
 731
 732         function _close()
 733         {
 734                 return @odbc_free_result($this->_queryID);
 735         }
 736
 737 }
 738 ?>