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/library/adodb/drivers/ -> adodb-odbc.inc.php (source)

   1  <?php
   2  /* 
   3  V5.11 5 May 2010   (c) 2000-2010 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  ?>


Generated: Thu Jul 28 15:48:31 2011 Cross-referenced by PHPXref 0.7