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

   1 <?php
   2 /*
   3 V5.14 8 Sept 2011  (c) 2000-2011 John Lim (jlim#natsoft.com). 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 $num;
 164                         } elseif ($this->affected_rows() == 0) {
 165                                 // some drivers do not return a valid value => try with another method
 166                                 $value = $this->GetOne("select id from $seq");
 167                                 if ($value == $num + 1) {
 168                                         return $value;
 169                                 }
 170                         }
 171                 }
 172                 if ($fn = $this->raiseErrorFn) {
 173                         $fn($this->databaseType,'GENID',-32000,"Unable to generate unique id after $MAXLOOPS attempts",$seq,$num);
 174                 }
 175                 return false;
 176         }
 177
 178
 179         function ErrorMsg()
 180         {
 181                 if ($this->_haserrorfunctions) {
 182                         if ($this->_errorMsg !== false) return $this->_errorMsg;
 183                         if (empty($this->_connectionID)) return @odbc_errormsg();
 184                         return @odbc_errormsg($this->_connectionID);
 185                 } else return ADOConnection::ErrorMsg();
 186         }
 187
 188         function ErrorNo()
 189         {
 190
 191                 if ($this->_haserrorfunctions) {
 192                         if ($this->_errorCode !== false) {
 193                                 // bug in 4.0.6, error number can be corrupted string (should be 6 digits)
 194                                 return (strlen($this->_errorCode)<=2) ? 0 : $this->_errorCode;
 195                         }
 196
 197                         if (empty($this->_connectionID)) $e = @odbc_error();
 198                         else $e = @odbc_error($this->_connectionID);
 199
 200                          // bug in 4.0.6, error number can be corrupted string (should be 6 digits)
 201                          // so we check and patch
 202                         if (strlen($e)<=2) return 0;
 203                         return $e;
 204                 } else return ADOConnection::ErrorNo();
 205         }
 206
 207
 208
 209         function BeginTrans()
 210         {
 211                 if (!$this->hasTransactions) return false;
 212                 if ($this->transOff) return true;
 213                 $this->transCnt += 1;
 214                 $this->_autocommit = false;
 215                 return odbc_autocommit($this->_connectionID,false);
 216         }
 217
 218         function CommitTrans($ok=true)
 219         {
 220                 if ($this->transOff) return true;
 221                 if (!$ok) return $this->RollbackTrans();
 222                 if ($this->transCnt) $this->transCnt -= 1;
 223                 $this->_autocommit = true;
 224                 $ret = odbc_commit($this->_connectionID);
 225                 odbc_autocommit($this->_connectionID,true);
 226                 return $ret;
 227         }
 228
 229         function RollbackTrans()
 230         {
 231                 if ($this->transOff) return true;
 232                 if ($this->transCnt) $this->transCnt -= 1;
 233                 $this->_autocommit = true;
 234                 $ret = odbc_rollback($this->_connectionID);
 235                 odbc_autocommit($this->_connectionID,true);
 236                 return $ret;
 237         }
 238
 239         function MetaPrimaryKeys($table)
 240         {
 241         global $ADODB_FETCH_MODE;
 242
 243                 if ($this->uCaseTables) $table = strtoupper($table);
 244                 $schema = '';
 245                 $this->_findschema($table,$schema);
 246
 247                 $savem = $ADODB_FETCH_MODE;
 248                 $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
 249                 $qid = @odbc_primarykeys($this->_connectionID,'',$schema,$table);
 250
 251                 if (!$qid) {
 252                         $ADODB_FETCH_MODE = $savem;
 253                         return false;
 254                 }
 255                 $rs = new ADORecordSet_odbc($qid);
 256                 $ADODB_FETCH_MODE = $savem;
 257
 258                 if (!$rs) return false;
 259                 $rs->_has_stupid_odbc_fetch_api_change = $this->_has_stupid_odbc_fetch_api_change;
 260
 261                 $arr = $rs->GetArray();
 262                 $rs->Close();
 263                 //print_r($arr);
 264                 $arr2 = array();
 265                 for ($i=0; $i < sizeof($arr); $i++) {
 266                         if ($arr[$i][3]) $arr2[] = $arr[$i][3];
 267                 }
 268                 return $arr2;
 269         }
 270
 271
 272
 273         function MetaTables($ttype=false)
 274         {
 275         global $ADODB_FETCH_MODE;
 276
 277                 $savem = $ADODB_FETCH_MODE;
 278                 $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
 279                 $qid = odbc_tables($this->_connectionID);
 280
 281                 $rs = new ADORecordSet_odbc($qid);
 282
 283                 $ADODB_FETCH_MODE = $savem;
 284                 if (!$rs) {
 285                         $false = false;
 286                         return $false;
 287                 }
 288                 $rs->_has_stupid_odbc_fetch_api_change = $this->_has_stupid_odbc_fetch_api_change;
 289
 290                 $arr = $rs->GetArray();
 291                 //print_r($arr);
 292
 293                 $rs->Close();
 294                 $arr2 = array();
 295
 296                 if ($ttype) {
 297                         $isview = strncmp($ttype,'V',1) === 0;
 298                 }
 299                 for ($i=0; $i < sizeof($arr); $i++) {
 300                         if (!$arr[$i][2]) continue;
 301                         $type = $arr[$i][3];
 302                         if ($ttype) {
 303                                 if ($isview) {
 304                                         if (strncmp($type,'V',1) === 0) $arr2[] = $arr[$i][2];
 305                                 } else if (strncmp($type,'SYS',3) !== 0) $arr2[] = $arr[$i][2];
 306                         } else if (strncmp($type,'SYS',3) !== 0) $arr2[] = $arr[$i][2];
 307                 }
 308                 return $arr2;
 309         }
 310
 311 /*
 312 See http://msdn.microsoft.com/library/default.asp?url=/library/en-us/odbc/htm/odbcdatetime_data_type_changes.asp
 313 / SQL data type codes /
 314 #define SQL_UNKNOWN_TYPE        0
 315 #define SQL_CHAR                        1
 316 #define SQL_NUMERIC              2
 317 #define SQL_DECIMAL              3
 318 #define SQL_INTEGER              4
 319 #define SQL_SMALLINT            5
 320 #define SQL_FLOAT                  6
 321 #define SQL_REAL                        7
 322 #define SQL_DOUBLE                8
 323 #if (ODBCVER >= 0x0300)
 324 #define SQL_DATETIME            9
 325 #endif
 326 #define SQL_VARCHAR             12
 327
 328
 329 / One-parameter shortcuts for date/time data types /
 330 #if (ODBCVER >= 0x0300)
 331 #define SQL_TYPE_DATE     91
 332 #define SQL_TYPE_TIME     92
 333 #define SQL_TYPE_TIMESTAMP 93
 334
 335 #define SQL_UNICODE                             (-95)
 336 #define SQL_UNICODE_VARCHAR                     (-96)
 337 #define SQL_UNICODE_LONGVARCHAR                 (-97)
 338 */
 339         function ODBCTypes($t)
 340         {
 341                 switch ((integer)$t) {
 342                 case 1:
 343                 case 12:
 344                 case 0:
 345                 case -95:
 346                 case -96:
 347                         return 'C';
 348                 case -97:
 349                 case -1: //text
 350                         return 'X';
 351                 case -4: //image
 352                         return 'B';
 353
 354                 case 9:
 355                 case 91:
 356                         return 'D';
 357
 358                 case 10:
 359                 case 11:
 360                 case 92:
 361                 case 93:
 362                         return 'T';
 363
 364                 case 4:
 365                 case 5:
 366                 case -6:
 367                         return 'I';
 368
 369                 case -11: // uniqidentifier
 370                         return 'R';
 371                 case -7: //bit
 372                         return 'L';
 373
 374                 default:
 375                         return 'N';
 376                 }
 377         }
 378
 379         function MetaColumns($table, $normalize=true)
 380         {
 381         global $ADODB_FETCH_MODE;
 382
 383                 $false = false;
 384                 if ($this->uCaseTables) $table = strtoupper($table);
 385                 $schema = '';
 386                 $this->_findschema($table,$schema);
 387
 388                 $savem = $ADODB_FETCH_MODE;
 389                 $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
 390
 391                 /*if (false) { // after testing, confirmed that the following does not work becoz of a bug
 392                         $qid2 = odbc_tables($this->_connectionID);
 393                         $rs = new ADORecordSet_odbc($qid2);
 394                         $ADODB_FETCH_MODE = $savem;
 395                         if (!$rs) return false;
 396                         $rs->_has_stupid_odbc_fetch_api_change = $this->_has_stupid_odbc_fetch_api_change;
 397                         $rs->_fetch();
 398
 399                         while (!$rs->EOF) {
 400                                 if ($table == strtoupper($rs->fields[2])) {
 401                                         $q = $rs->fields[0];
 402                                         $o = $rs->fields[1];
 403                                         break;
 404                                 }
 405                                 $rs->MoveNext();
 406                         }
 407                         $rs->Close();
 408
 409                         $qid = odbc_columns($this->_connectionID,$q,$o,strtoupper($table),'%');
 410                 } */
 411
 412                 switch ($this->databaseType) {
 413                 case 'access':
 414                 case 'vfp':
 415                         $qid = odbc_columns($this->_connectionID);#,'%','',strtoupper($table),'%');
 416                         break;
 417
 418
 419                 case 'db2':
 420             $colname = "%";
 421             $qid = odbc_columns($this->_connectionID, "", $schema, $table, $colname);
 422             break;
 423
 424                 default:
 425                         $qid = @odbc_columns($this->_connectionID,'%','%',strtoupper($table),'%');
 426                         if (empty($qid)) $qid = odbc_columns($this->_connectionID);
 427                         break;
 428                 }
 429                 if (empty($qid)) return $false;
 430
 431                 $rs = new ADORecordSet_odbc($qid);
 432                 $ADODB_FETCH_MODE = $savem;
 433
 434                 if (!$rs) return $false;
 435                 $rs->_has_stupid_odbc_fetch_api_change = $this->_has_stupid_odbc_fetch_api_change;
 436                 $rs->_fetch();
 437
 438                 $retarr = array();
 439
 440                 /*
 441                 $rs->fields indices
 442                 0 TABLE_QUALIFIER
 443                 1 TABLE_SCHEM
 444                 2 TABLE_NAME
 445                 3 COLUMN_NAME
 446                 4 DATA_TYPE
 447                 5 TYPE_NAME
 448                 6 PRECISION
 449                 7 LENGTH
 450                 8 SCALE
 451                 9 RADIX
 452                 10 NULLABLE
 453                 11 REMARKS
 454                 */
 455                 while (!$rs->EOF) {
 456                 //      adodb_pr($rs->fields);
 457                         if (strtoupper(trim($rs->fields[2])) == $table && (!$schema || strtoupper($rs->fields[1]) == $schema)) {
 458                                 $fld = new ADOFieldObject();
 459                                 $fld->name = $rs->fields[3];
 460                                 $fld->type = $this->ODBCTypes($rs->fields[4]);
 461
 462                                 // ref: http://msdn.microsoft.com/library/default.asp?url=/archive/en-us/dnaraccgen/html/msdn_odk.asp
 463                                 // access uses precision to store length for char/varchar
 464                                 if ($fld->type == 'C' or $fld->type == 'X') {
 465                                         if ($this->databaseType == 'access')
 466                                                 $fld->max_length = $rs->fields[6];
 467                                         else if ($rs->fields[4] <= -95) // UNICODE
 468                                                 $fld->max_length = $rs->fields[7]/2;
 469                                         else
 470                                                 $fld->max_length = $rs->fields[7];
 471                                 } else
 472                                         $fld->max_length = $rs->fields[7];
 473                                 $fld->not_null = !empty($rs->fields[10]);
 474                                 $fld->scale = $rs->fields[8];
 475                                 $retarr[strtoupper($fld->name)] = $fld;
 476                         } else if (sizeof($retarr)>0)
 477                                 break;
 478                         $rs->MoveNext();
 479                 }
 480                 $rs->Close(); //-- crashes 4.03pl1 -- why?
 481
 482                 if (empty($retarr)) $retarr = false;
 483                 return $retarr;
 484         }
 485
 486         function Prepare($sql)
 487         {
 488                 if (! $this->_bindInputArray) return $sql; // no binding
 489                 $stmt = odbc_prepare($this->_connectionID,$sql);
 490                 if (!$stmt) {
 491                         // we don't know whether odbc driver is parsing prepared stmts, so just return sql
 492                         return $sql;
 493                 }
 494                 return array($sql,$stmt,false);
 495         }
 496
 497         /* returns queryID or false */
 498         function _query($sql,$inputarr=false)
 499         {
 500         GLOBAL $php_errormsg;
 501                 if (isset($php_errormsg)) $php_errormsg = '';
 502                 $this->_error = '';
 503
 504                 if ($inputarr) {
 505                         if (is_array($sql)) {
 506                                 $stmtid = $sql[1];
 507                         } else {
 508                                 $stmtid = odbc_prepare($this->_connectionID,$sql);
 509
 510                                 if ($stmtid == false) {
 511                                         $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
 512                                         return false;
 513                                 }
 514                         }
 515
 516                         if (! odbc_execute($stmtid,$inputarr)) {
 517                                 //@odbc_free_result($stmtid);
 518                                 if ($this->_haserrorfunctions) {
 519                                         $this->_errorMsg = odbc_errormsg();
 520                                         $this->_errorCode = odbc_error();
 521                                 }
 522                                 return false;
 523                         }
 524
 525                 } else if (is_array($sql)) {
 526                         $stmtid = $sql[1];
 527                         if (!odbc_execute($stmtid)) {
 528                                 //@odbc_free_result($stmtid);
 529                                 if ($this->_haserrorfunctions) {
 530                                         $this->_errorMsg = odbc_errormsg();
 531                                         $this->_errorCode = odbc_error();
 532                                 }
 533                                 return false;
 534                         }
 535                 } else
 536                         $stmtid = odbc_exec($this->_connectionID,$sql);
 537
 538                 $this->_lastAffectedRows = 0;
 539                 if ($stmtid) {
 540                         if (@odbc_num_fields($stmtid) == 0) {
 541                                 $this->_lastAffectedRows = odbc_num_rows($stmtid);
 542                                 $stmtid = true;
 543                         } else {
 544                                 $this->_lastAffectedRows = 0;
 545                                 odbc_binmode($stmtid,$this->binmode);
 546                                 odbc_longreadlen($stmtid,$this->maxblobsize);
 547                         }
 548
 549                         if ($this->_haserrorfunctions) {
 550                                 $this->_errorMsg = '';
 551                                 $this->_errorCode = 0;
 552                         } else
 553                                 $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
 554                 } else {
 555                         if ($this->_haserrorfunctions) {
 556                                 $this->_errorMsg = odbc_errormsg();
 557                                 $this->_errorCode = odbc_error();
 558                         } else
 559                                 $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
 560                 }
 561                 return $stmtid;
 562         }
 563
 564         /*
 565                 Insert a null into the blob field of the table first.
 566                 Then use UpdateBlob to store the blob.
 567
 568                 Usage:
 569
 570                 $conn->Execute('INSERT INTO blobtable (id, blobcol) VALUES (1, null)');
 571                 $conn->UpdateBlob('blobtable','blobcol',$blob,'id=1');
 572         */
 573         function UpdateBlob($table,$column,$val,$where,$blobtype='BLOB')
 574         {
 575                 return $this->Execute("UPDATE $table SET $column=? WHERE $where",array($val)) != false;
 576         }
 577
 578         // returns true or false
 579         function _close()
 580         {
 581                 $ret = @odbc_close($this->_connectionID);
 582                 $this->_connectionID = false;
 583                 return $ret;
 584         }
 585
 586         function _affectedrows()
 587         {
 588                 return $this->_lastAffectedRows;
 589         }
 590
 591 }
 592
 593 /*--------------------------------------------------------------------------------------
 594          Class Name: Recordset
 595 --------------------------------------------------------------------------------------*/
 596
 597 class ADORecordSet_odbc extends ADORecordSet {
 598
 599         var $bind = false;
 600         var $databaseType = "odbc";
 601         var $dataProvider = "odbc";
 602         var $useFetchArray;
 603         var $_has_stupid_odbc_fetch_api_change;
 604
 605         function ADORecordSet_odbc($id,$mode=false)
 606         {
 607                 if ($mode === false) {
 608                         global $ADODB_FETCH_MODE;
 609                         $mode = $ADODB_FETCH_MODE;
 610                 }
 611                 $this->fetchMode = $mode;
 612
 613                 $this->_queryID = $id;
 614
 615                 // the following is required for mysql odbc driver in 4.3.1 -- why?
 616                 $this->EOF = false;
 617                 $this->_currentRow = -1;
 618                 //$this->ADORecordSet($id);
 619         }
 620
 621
 622         // returns the field object
 623         function FetchField($fieldOffset = -1)
 624         {
 625
 626                 $off=$fieldOffset+1; // offsets begin at 1
 627
 628                 $o= new ADOFieldObject();
 629                 $o->name = @odbc_field_name($this->_queryID,$off);
 630                 $o->type = @odbc_field_type($this->_queryID,$off);
 631                 $o->max_length = @odbc_field_len($this->_queryID,$off);
 632                 if (ADODB_ASSOC_CASE == 0) $o->name = strtolower($o->name);
 633                 else if (ADODB_ASSOC_CASE == 1) $o->name = strtoupper($o->name);
 634                 return $o;
 635         }
 636
 637         /* Use associative array to get fields array */
 638         function Fields($colname)
 639         {
 640                 if ($this->fetchMode & ADODB_FETCH_ASSOC) return $this->fields[$colname];
 641                 if (!$this->bind) {
 642                         $this->bind = array();
 643                         for ($i=0; $i < $this->_numOfFields; $i++) {
 644                                 $o = $this->FetchField($i);
 645                                 $this->bind[strtoupper($o->name)] = $i;
 646                         }
 647                 }
 648
 649                  return $this->fields[$this->bind[strtoupper($colname)]];
 650         }
 651
 652
 653         function _initrs()
 654         {
 655         global $ADODB_COUNTRECS;
 656                 $this->_numOfRows = ($ADODB_COUNTRECS) ? @odbc_num_rows($this->_queryID) : -1;
 657                 $this->_numOfFields = @odbc_num_fields($this->_queryID);
 658                 // some silly drivers such as db2 as/400 and intersystems cache return _numOfRows = 0
 659                 if ($this->_numOfRows == 0) $this->_numOfRows = -1;
 660                 //$this->useFetchArray = $this->connection->useFetchArray;
 661                 $this->_has_stupid_odbc_fetch_api_change = ADODB_PHPVER >= 0x4200;
 662         }
 663
 664         function _seek($row)
 665         {
 666                 return false;
 667         }
 668
 669         // speed up SelectLimit() by switching to ADODB_FETCH_NUM as ADODB_FETCH_ASSOC is emulated
 670         function GetArrayLimit($nrows,$offset=-1)
 671         {
 672                 if ($offset <= 0) {
 673                         $rs = $this->GetArray($nrows);
 674                         return $rs;
 675                 }
 676                 $savem = $this->fetchMode;
 677                 $this->fetchMode = ADODB_FETCH_NUM;
 678                 $this->Move($offset);
 679                 $this->fetchMode = $savem;
 680
 681                 if ($this->fetchMode & ADODB_FETCH_ASSOC) {
 682                         $this->fields = $this->GetRowAssoc(ADODB_ASSOC_CASE);
 683                 }
 684
 685                 $results = array();
 686                 $cnt = 0;
 687                 while (!$this->EOF && $nrows != $cnt) {
 688                         $results[$cnt++] = $this->fields;
 689                         $this->MoveNext();
 690                 }
 691
 692                 return $results;
 693         }
 694
 695
 696         function MoveNext()
 697         {
 698                 if ($this->_numOfRows != 0 && !$this->EOF) {
 699                         $this->_currentRow++;
 700
 701                         if ($this->_has_stupid_odbc_fetch_api_change)
 702                                 $rez = @odbc_fetch_into($this->_queryID,$this->fields);
 703                         else {
 704                                 $row = 0;
 705                                 $rez = @odbc_fetch_into($this->_queryID,$row,$this->fields);
 706                         }
 707                         if ($rez) {
 708                                 if ($this->fetchMode & ADODB_FETCH_ASSOC) {
 709                                         $this->fields = $this->GetRowAssoc(ADODB_ASSOC_CASE);
 710                                 }
 711                                 return true;
 712                         }
 713                 }
 714                 $this->fields = false;
 715                 $this->EOF = true;
 716                 return false;
 717         }
 718
 719         function _fetch()
 720         {
 721
 722                 if ($this->_has_stupid_odbc_fetch_api_change)
 723                         $rez = @odbc_fetch_into($this->_queryID,$this->fields);
 724                 else {
 725                         $row = 0;
 726                         $rez = @odbc_fetch_into($this->_queryID,$row,$this->fields);
 727                 }
 728                 if ($rez) {
 729                         if ($this->fetchMode & ADODB_FETCH_ASSOC) {
 730                                 $this->fields = $this->GetRowAssoc(ADODB_ASSOC_CASE);
 731                         }
 732                         return true;
 733                 }
 734                 $this->fields = false;
 735                 return false;
 736         }
 737
 738         function _close()
 739         {
 740                 return @odbc_free_result($this->_queryID);
 741         }
 742
 743 }
 744 ?>