00001 <?php
00002 
00016 /*
00017         Test script for parser
00018 */
00019 
00020 // security - hide paths
00021 if (!defined('ADODB_DIR')) die();
00022 
00023 function Lens_ParseTest()
00024 {
00025 $str = "`zcol ACOL` NUMBER(32,2) DEFAULT 'The \"cow\" (and Jim''s dog) jumps over the moon' PRIMARY, INTI INT AUTO DEFAULT 0, zcol2\"afs ds";
00026 print "<p>$str</p>";
00027 $a= Lens_ParseArgs($str);
00028 print "<pre>";
00029 print_r($a);
00030 print "</pre>";
00031 }
00032 
00033 
00034 if (!function_exists('ctype_alnum')) {
00035         function ctype_alnum($text) {
00036                 return preg_match('/^[a-z0-9]*$/i', $text);
00037         }
00038 }
00039 
00040 //Lens_ParseTest();
00041 
00054 function Lens_ParseArgs($args,$endstmtchar=',',$tokenchars='_.-')
00055 {
00056         $pos = 0;
00057         $intoken = false;
00058         $stmtno = 0;
00059         $endquote = false;
00060         $tokens = array();
00061         $tokens[$stmtno] = array();
00062         $max = strlen($args);
00063         $quoted = false;
00064         $tokarr = array();
00065 
00066         while ($pos < $max) {
00067                 $ch = substr($args,$pos,1);
00068                 switch($ch) {
00069                 case ' ':
00070                 case "\t":
00071                 case "\n":
00072                 case "\r":
00073                         if (!$quoted) {
00074                                 if ($intoken) {
00075                                         $intoken = false;
00076                                         $tokens[$stmtno][] = implode('',$tokarr);
00077                                 }
00078                                 break;
00079                         }
00080 
00081                         $tokarr[] = $ch;
00082                         break;
00083 
00084                 case '`':
00085                         if ($intoken) $tokarr[] = $ch;
00086                 case '(':
00087                 case ')':
00088                 case '"':
00089                 case "'":
00090 
00091                         if ($intoken) {
00092                                 if (empty($endquote)) {
00093                                         $tokens[$stmtno][] = implode('',$tokarr);
00094                                         if ($ch == '(') $endquote = ')';
00095                                         else $endquote = $ch;
00096                                         $quoted = true;
00097                                         $intoken = true;
00098                                         $tokarr = array();
00099                                 } else if ($endquote == $ch) {
00100                                         $ch2 = substr($args,$pos+1,1);
00101                                         if ($ch2 == $endquote) {
00102                                                 $pos += 1;
00103                                                 $tokarr[] = $ch2;
00104                                         } else {
00105                                                 $quoted = false;
00106                                                 $intoken = false;
00107                                                 $tokens[$stmtno][] = implode('',$tokarr);
00108                                                 $endquote = '';
00109                                         }
00110                                 } else
00111                                         $tokarr[] = $ch;
00112 
00113                         }else {
00114 
00115                                 if ($ch == '(') $endquote = ')';
00116                                 else $endquote = $ch;
00117                                 $quoted = true;
00118                                 $intoken = true;
00119                                 $tokarr = array();
00120                                 if ($ch == '`') $tokarr[] = '`';
00121                         }
00122                         break;
00123 
00124                 default:
00125 
00126                         if (!$intoken) {
00127                                 if ($ch == $endstmtchar) {
00128                                         $stmtno += 1;
00129                                         $tokens[$stmtno] = array();
00130                                         break;
00131                                 }
00132 
00133                                 $intoken = true;
00134                                 $quoted = false;
00135                                 $endquote = false;
00136                                 $tokarr = array();
00137 
00138                         }
00139 
00140                         if ($quoted) $tokarr[] = $ch;
00141                         else if (ctype_alnum($ch) || strpos($tokenchars,$ch) !== false) $tokarr[] = $ch;
00142                         else {
00143                                 if ($ch == $endstmtchar) {
00144                                         $tokens[$stmtno][] = implode('',$tokarr);
00145                                         $stmtno += 1;
00146                                         $tokens[$stmtno] = array();
00147                                         $intoken = false;
00148                                         $tokarr = array();
00149                                         break;
00150                                 }
00151                                 $tokens[$stmtno][] = implode('',$tokarr);
00152                                 $tokens[$stmtno][] = $ch;
00153                                 $intoken = false;
00154                         }
00155                 }
00156                 $pos += 1;
00157         }
00158         if ($intoken) $tokens[$stmtno][] = implode('',$tokarr);
00159 
00160         return $tokens;
00161 }
00162 
00163 
00164 class ADODB_DataDict {
00165         var $connection;
00166         var $debug = false;
00167         var $dropTable = 'DROP TABLE %s';
00168         var $renameTable = 'RENAME TABLE %s TO %s';
00169         var $dropIndex = 'DROP INDEX %s';
00170         var $addCol = ' ADD';
00171         var $alterCol = ' ALTER COLUMN';
00172         var $dropCol = ' DROP COLUMN';
00173         var $renameColumn = 'ALTER TABLE %s RENAME COLUMN %s TO %s';    // table, old-column, new-column, column-definitions (not used by default)
00174         var $nameRegex = '\w';
00175         var $nameRegexBrackets = 'a-zA-Z0-9_\(\)';
00176         var $schema = false;
00177         var $serverInfo = array();
00178         var $autoIncrement = false;
00179         var $dataProvider;
00180         var $invalidResizeTypes4 = array('CLOB','BLOB','TEXT','DATE','TIME'); // for changetablesql
00181         var $blobSize = 100;    
00182 
00183 
00184         function GetCommentSQL($table,$col)
00185         {
00186                 return false;
00187         }
00188 
00189         function SetCommentSQL($table,$col,$cmt)
00190         {
00191                 return false;
00192         }
00193 
00194         function MetaTables()
00195         {
00196                 if (!$this->connection->IsConnected()) return array();
00197                 return $this->connection->MetaTables();
00198         }
00199 
00200         function MetaColumns($tab, $upper=true, $schema=false)
00201         {
00202                 if (!$this->connection->IsConnected()) return array();
00203                 return $this->connection->MetaColumns($this->TableName($tab), $upper, $schema);
00204         }
00205 
00206         function MetaPrimaryKeys($tab,$owner=false,$intkey=false)
00207         {
00208                 if (!$this->connection->IsConnected()) return array();
00209                 return $this->connection->MetaPrimaryKeys($this->TableName($tab), $owner, $intkey);
00210         }
00211 
00212         function MetaIndexes($table, $primary = false, $owner = false)
00213         {
00214                 if (!$this->connection->IsConnected()) return array();
00215                 return $this->connection->MetaIndexes($this->TableName($table), $primary, $owner);
00216         }
00217 
00218         function MetaType($t,$len=-1,$fieldobj=false)
00219         {
00220                 return ADORecordSet::MetaType($t,$len,$fieldobj);
00221         }
00222 
00223         function NameQuote($name = NULL,$allowBrackets=false)
00224         {
00225                 if (!is_string($name)) {
00226                         return FALSE;
00227                 }
00228 
00229                 $name = trim($name);
00230 
00231                 if ( !is_object($this->connection) ) {
00232                         return $name;
00233                 }
00234 
00235                 $quote = $this->connection->nameQuote;
00236 
00237                 // if name is of the form `name`, quote it
00238                 if ( preg_match('/^`(.+)`$/', $name, $matches) ) {
00239                         return $quote . $matches[1] . $quote;
00240                 }
00241 
00242                 // if name contains special characters, quote it
00243                 $regex = ($allowBrackets) ? $this->nameRegexBrackets : $this->nameRegex;
00244 
00245                 if ( !preg_match('/^[' . $regex . ']+$/', $name) ) {
00246                         return $quote . $name . $quote;
00247                 }
00248 
00249                 return $name;
00250         }
00251 
00252         function TableName($name)
00253         {
00254                 if ( $this->schema ) {
00255                         return $this->NameQuote($this->schema) .'.'. $this->NameQuote($name);
00256                 }
00257                 return $this->NameQuote($name);
00258         }
00259 
00260         // Executes the sql array returned by GetTableSQL and GetIndexSQL
00261         function ExecuteSQLArray($sql, $continueOnError = true)
00262         {
00263                 $rez = 2;
00264                 $conn = &$this->connection;
00265                 $saved = $conn->debug;
00266                 foreach($sql as $line) {
00267 
00268                         if ($this->debug) $conn->debug = true;
00269                         $ok = $conn->Execute($line);
00270                         $conn->debug = $saved;
00271                         if (!$ok) {
00272                                 if ($this->debug) ADOConnection::outp($conn->ErrorMsg());
00273                                 if (!$continueOnError) return 0;
00274                                 $rez = 1;
00275                         }
00276                 }
00277                 return $rez;
00278         }
00279 
00280         /*
00281                 Returns the actual type given a character code.
00282 
00283                 C:  varchar
00284                 X:  CLOB (character large object) or largest varchar size if CLOB is not supported
00285                 C2: Multibyte varchar
00286                 X2: Multibyte CLOB
00287 
00288                 B:  BLOB (binary large object)
00289 
00290                 D:  Date
00291                 T:  Date-time
00292                 L:  Integer field suitable for storing booleans (0 or 1)
00293                 I:  Integer
00294                 F:  Floating point number
00295                 N:  Numeric or decimal number
00296         */
00297 
00298         function ActualType($meta)
00299         {
00300                 return $meta;
00301         }
00302 
00303         function CreateDatabase($dbname,$options=false)
00304         {
00305                 $options = $this->_Options($options);
00306                 $sql = array();
00307 
00308                 $s = 'CREATE DATABASE ' . $this->NameQuote($dbname);
00309                 if (isset($options[$this->upperName]))
00310                         $s .= ' '.$options[$this->upperName];
00311 
00312                 $sql[] = $s;
00313                 return $sql;
00314         }
00315 
00316         /*
00317          Generates the SQL to create index. Returns an array of sql strings.
00318         */
00319         function CreateIndexSQL($idxname, $tabname, $flds, $idxoptions = false)
00320         {
00321                 if (!is_array($flds)) {
00322                         $flds = explode(',',$flds);
00323                 }
00324 
00325                 foreach($flds as $key => $fld) {
00326                         # some indexes can use partial fields, eg. index first 32 chars of "name" with NAME(32)
00327                         $flds[$key] = $this->NameQuote($fld,$allowBrackets=true);
00328                 }
00329 
00330                 return $this->_IndexSQL($this->NameQuote($idxname), $this->TableName($tabname), $flds, $this->_Options($idxoptions));
00331         }
00332 
00333         function DropIndexSQL ($idxname, $tabname = NULL)
00334         {
00335                 return array(sprintf($this->dropIndex, $this->NameQuote($idxname), $this->TableName($tabname)));
00336         }
00337 
00338         function SetSchema($schema)
00339         {
00340                 $this->schema = $schema;
00341         }
00342 
00343         function AddColumnSQL($tabname, $flds)
00344         {
00345                 $tabname = $this->TableName ($tabname);
00346                 $sql = array();
00347                 list($lines,$pkey) = $this->_GenFields($flds);
00348                 $alter = 'ALTER TABLE ' . $tabname . $this->addCol . ' ';
00349                 foreach($lines as $v) {
00350                         $sql[] = $alter . $v;
00351                 }
00352                 return $sql;
00353         }
00354 
00366         function AlterColumnSQL($tabname, $flds, $tableflds='',$tableoptions='')
00367         {
00368                 $tabname = $this->TableName ($tabname);
00369                 $sql = array();
00370                 list($lines,$pkey) = $this->_GenFields($flds);
00371                 $alter = 'ALTER TABLE ' . $tabname . $this->alterCol . ' ';
00372                 foreach($lines as $v) {
00373                         $sql[] = $alter . $v;
00374                 }
00375                 return $sql;
00376         }
00377 
00388         function RenameColumnSQL($tabname,$oldcolumn,$newcolumn,$flds='')
00389         {
00390                 $tabname = $this->TableName ($tabname);
00391                 if ($flds) {
00392                         list($lines,$pkey) = $this->_GenFields($flds);
00393                         list(,$first) = each($lines);
00394                         list(,$column_def) = split("[\t ]+",$first,2);
00395                 }
00396                 return array(sprintf($this->renameColumn,$tabname,$this->NameQuote($oldcolumn),$this->NameQuote($newcolumn),$column_def));
00397         }
00398 
00410         function DropColumnSQL($tabname, $flds, $tableflds='',$tableoptions='')
00411         {
00412                 $tabname = $this->TableName ($tabname);
00413                 if (!is_array($flds)) $flds = explode(',',$flds);
00414                 $sql = array();
00415                 $alter = 'ALTER TABLE ' . $tabname . $this->dropCol . ' ';
00416                 foreach($flds as $v) {
00417                         $sql[] = $alter . $this->NameQuote($v);
00418                 }
00419                 return $sql;
00420         }
00421 
00422         function DropTableSQL($tabname)
00423         {
00424                 return array (sprintf($this->dropTable, $this->TableName($tabname)));
00425         }
00426 
00427         function RenameTableSQL($tabname,$newname)
00428         {
00429                 return array (sprintf($this->renameTable, $this->TableName($tabname),$this->TableName($newname)));
00430         }
00431 
00432         /*
00433          Generate the SQL to create table. Returns an array of sql strings.
00434         */
00435         function CreateTableSQL($tabname, $flds, $tableoptions=false)
00436         {
00437                 if (!$tableoptions) $tableoptions = array();
00438 
00439                 list($lines,$pkey) = $this->_GenFields($flds, true);
00440 
00441                 $taboptions = $this->_Options($tableoptions);
00442                 $tabname = $this->TableName ($tabname);
00443                 $sql = $this->_TableSQL($tabname,$lines,$pkey,$taboptions);
00444 
00445                 $tsql = $this->_Triggers($tabname,$taboptions);
00446                 foreach($tsql as $s) $sql[] = $s;
00447 
00448                 return $sql;
00449         }
00450 
00451         function _GenFields($flds,$widespacing=false)
00452         {
00453                 if (is_string($flds)) {
00454                         $padding = '     ';
00455                         $txt = $flds.$padding;
00456                         $flds = array();
00457                         $flds0 = Lens_ParseArgs($txt,',');
00458                         $hasparam = false;
00459                         foreach($flds0 as $f0) {
00460                                 $f1 = array();
00461                                 foreach($f0 as $token) {
00462                                         switch (strtoupper($token)) {
00463                                         case 'CONSTRAINT':
00464                                         case 'DEFAULT':
00465                                                 $hasparam = $token;
00466                                                 break;
00467                                         default:
00468                                                 if ($hasparam) $f1[$hasparam] = $token;
00469                                                 else $f1[] = $token;
00470                                                 $hasparam = false;
00471                                                 break;
00472                                         }
00473                                 }
00474                                 $flds[] = $f1;
00475 
00476                         }
00477                 }
00478                 $this->autoIncrement = false;
00479                 $lines = array();
00480                 $pkey = array();
00481                 foreach($flds as $fld) {
00482                         $fld = _array_change_key_case($fld);
00483 
00484                         $fname = false;
00485                         $fdefault = false;
00486                         $fautoinc = false;
00487                         $ftype = false;
00488                         $fsize = false;
00489                         $fprec = false;
00490                         $fprimary = false;
00491                         $fnoquote = false;
00492                         $fdefts = false;
00493                         $fdefdate = false;
00494                         $fconstraint = false;
00495                         $fnotnull = false;
00496                         $funsigned = false;
00497 
00498                         //-----------------
00499                         // Parse attributes
00500                         foreach($fld as $attr => $v) {
00501                                 if ($attr == 2 && is_numeric($v)) $attr = 'SIZE';
00502                                 else if (is_numeric($attr) && $attr > 1 && !is_numeric($v)) $attr = strtoupper($v);
00503 
00504                                 switch($attr) {
00505                                 case '0':
00506                                 case 'NAME':    $fname = $v; break;
00507                                 case '1':
00508                                 case 'TYPE':    $ty = $v; $ftype = $this->ActualType(strtoupper($v)); break;
00509 
00510                                 case 'SIZE':
00511                                                                 $dotat = strpos($v,'.'); if ($dotat === false) $dotat = strpos($v,',');
00512                                                                 if ($dotat === false) $fsize = $v;
00513                                                                 else {
00514                                                                         $fsize = substr($v,0,$dotat);
00515                                                                         $fprec = substr($v,$dotat+1);
00516                                                                 }
00517                                                                 break;
00518                                 case 'UNSIGNED': $funsigned = true; break;
00519                                 case 'AUTOINCREMENT':
00520                                 case 'AUTO':    $fautoinc = true; $fnotnull = true; break;
00521                                 case 'KEY':
00522                                 case 'PRIMARY': $fprimary = $v; $fnotnull = true; break;
00523                                 case 'DEF':
00524                                 case 'DEFAULT': $fdefault = $v; break;
00525                                 case 'NOTNULL': $fnotnull = $v; break;
00526                                 case 'NOQUOTE': $fnoquote = $v; break;
00527                                 case 'DEFDATE': $fdefdate = $v; break;
00528                                 case 'DEFTIMESTAMP': $fdefts = $v; break;
00529                                 case 'CONSTRAINT': $fconstraint = $v; break;
00530                                 } //switch
00531                         } // foreach $fld
00532 
00533                         //--------------------
00534                         // VALIDATE FIELD INFO
00535                         if (!strlen($fname)) {
00536                                 if ($this->debug) ADOConnection::outp("Undefined NAME");
00537                                 return false;
00538                         }
00539 
00540                         $fid = strtoupper(preg_replace('/^`(.+)`$/', '$1', $fname));
00541                         $fname = $this->NameQuote($fname);
00542 
00543                         if (!strlen($ftype)) {
00544                                 if ($this->debug) ADOConnection::outp("Undefined TYPE for field '$fname'");
00545                                 return false;
00546                         } else {
00547                                 $ftype = strtoupper($ftype);
00548                         }
00549 
00550                         $ftype = $this->_GetSize($ftype, $ty, $fsize, $fprec);
00551 
00552                         if ($ty == 'X' || $ty == 'X2' || $ty == 'B') $fnotnull = false; // some blob types do not accept nulls
00553 
00554                         if ($fprimary) $pkey[] = $fname;
00555 
00556                         // some databases do not allow blobs to have defaults
00557                         if ($ty == 'X') $fdefault = false;
00558 
00559                         //--------------------
00560                         // CONSTRUCT FIELD SQL
00561                         if ($fdefts) {
00562                                 if (substr($this->connection->databaseType,0,5) == 'mysql') {
00563                                         $ftype = 'TIMESTAMP';
00564                                 } else {
00565                                         $fdefault = $this->connection->sysTimeStamp;
00566                                 }
00567                         } else if ($fdefdate) {
00568                                 if (substr($this->connection->databaseType,0,5) == 'mysql') {
00569                                         $ftype = 'TIMESTAMP';
00570                                 } else {
00571                                         $fdefault = $this->connection->sysDate;
00572                                 }
00573                         } else if ($fdefault !== false && !$fnoquote)
00574                                 if ($ty == 'C' or $ty == 'X' or
00575                                         ( substr($fdefault,0,1) != "'" && !is_numeric($fdefault)))
00576                                         if (strlen($fdefault) != 1 && substr($fdefault,0,1) == ' ' && substr($fdefault,strlen($fdefault)-1) == ' ')
00577                                                 $fdefault = trim($fdefault);
00578                                         else if (strtolower($fdefault) != 'null')
00579                                                 $fdefault = $this->connection->qstr($fdefault);
00580                         $suffix = $this->_CreateSuffix($fname,$ftype,$fnotnull,$fdefault,$fautoinc,$fconstraint,$funsigned);
00581 
00582                         if ($widespacing) $fname = str_pad($fname,24);
00583                         $lines[$fid] = $fname.' '.$ftype.$suffix;
00584 
00585                         if ($fautoinc) $this->autoIncrement = true;
00586                 } // foreach $flds
00587 
00588                 return array($lines,$pkey);
00589         }
00590         /*
00591                  GENERATE THE SIZE PART OF THE DATATYPE
00592                         $ftype is the actual type
00593                         $ty is the type defined originally in the DDL
00594         */
00595         function _GetSize($ftype, $ty, $fsize, $fprec)
00596         {
00597                 if (strlen($fsize) && $ty != 'X' && $ty != 'B' && strpos($ftype,'(') === false) {
00598                         $ftype .= "(".$fsize;
00599                         if (strlen($fprec)) $ftype .= ",".$fprec;
00600                         $ftype .= ')';
00601                 }
00602                 return $ftype;
00603         }
00604 
00605 
00606         // return string must begin with space
00607         function _CreateSuffix($fname,$ftype,$fnotnull,$fdefault,$fautoinc,$fconstraint)
00608         {
00609                 $suffix = '';
00610                 if (strlen($fdefault)) $suffix .= " DEFAULT $fdefault";
00611                 if ($fnotnull) $suffix .= ' NOT NULL';
00612                 if ($fconstraint) $suffix .= ' '.$fconstraint;
00613                 return $suffix;
00614         }
00615 
00616         function _IndexSQL($idxname, $tabname, $flds, $idxoptions)
00617         {
00618                 $sql = array();
00619 
00620                 if ( isset($idxoptions['REPLACE']) || isset($idxoptions['DROP']) ) {
00621                         $sql[] = sprintf ($this->dropIndex, $idxname);
00622                         if ( isset($idxoptions['DROP']) )
00623                                 return $sql;
00624                 }
00625 
00626                 if ( empty ($flds) ) {
00627                         return $sql;
00628                 }
00629 
00630                 $unique = isset($idxoptions['UNIQUE']) ? ' UNIQUE' : '';
00631 
00632                 $s = 'CREATE' . $unique . ' INDEX ' . $idxname . ' ON ' . $tabname . ' ';
00633 
00634                 if ( isset($idxoptions[$this->upperName]) )
00635                         $s .= $idxoptions[$this->upperName];
00636 
00637                 if ( is_array($flds) )
00638                         $flds = implode(', ',$flds);
00639                 $s .= '(' . $flds . ')';
00640                 $sql[] = $s;
00641 
00642                 return $sql;
00643         }
00644 
00645         function _DropAutoIncrement($tabname)
00646         {
00647                 return false;
00648         }
00649 
00650         function _TableSQL($tabname,$lines,$pkey,$tableoptions)
00651         {
00652                 $sql = array();
00653 
00654                 if (isset($tableoptions['REPLACE']) || isset ($tableoptions['DROP'])) {
00655                         $sql[] = sprintf($this->dropTable,$tabname);
00656                         if ($this->autoIncrement) {
00657                                 $sInc = $this->_DropAutoIncrement($tabname);
00658                                 if ($sInc) $sql[] = $sInc;
00659                         }
00660                         if ( isset ($tableoptions['DROP']) ) {
00661                                 return $sql;
00662                         }
00663                 }
00664                 $s = "CREATE TABLE $tabname (\n";
00665                 $s .= implode(",\n", $lines);
00666                 if (sizeof($pkey)>0) {
00667                         $s .= ",\n                 PRIMARY KEY (";
00668                         $s .= implode(", ",$pkey).")";
00669                 }
00670                 if (isset($tableoptions['CONSTRAINTS']))
00671                         $s .= "\n".$tableoptions['CONSTRAINTS'];
00672 
00673                 if (isset($tableoptions[$this->upperName.'_CONSTRAINTS']))
00674                         $s .= "\n".$tableoptions[$this->upperName.'_CONSTRAINTS'];
00675 
00676                 $s .= "\n)";
00677                 if (isset($tableoptions[$this->upperName])) $s .= $tableoptions[$this->upperName];
00678                 $sql[] = $s;
00679 
00680                 return $sql;
00681         }
00682 
00683         /*
00684                 GENERATE TRIGGERS IF NEEDED
00685                 used when table has auto-incrementing field that is emulated using triggers
00686         */
00687         function _Triggers($tabname,$taboptions)
00688         {
00689                 return array();
00690         }
00691 
00692         /*
00693                 Sanitize options, so that array elements with no keys are promoted to keys
00694         */
00695         function _Options($opts)
00696         {
00697                 if (!is_array($opts)) return array();
00698                 $newopts = array();
00699                 foreach($opts as $k => $v) {
00700                         if (is_numeric($k)) $newopts[strtoupper($v)] = $v;
00701                         else $newopts[strtoupper($k)] = $v;
00702                 }
00703                 return $newopts;
00704         }
00705 
00706         /*
00707         "Florian Buzin [ easywe ]" <florian.buzin#easywe.de>
00708 
00709         This function changes/adds new fields to your table. You don't
00710         have to know if the col is new or not. It will check on its own.
00711         */
00712         function ChangeTableSQL($tablename, $flds, $tableoptions = false)
00713         {
00714         global $ADODB_FETCH_MODE;
00715 
00716                 $save = $ADODB_FETCH_MODE;
00717                 $ADODB_FETCH_MODE = ADODB_FETCH_ASSOC;
00718                 if ($this->connection->fetchMode !== false) $savem = $this->connection->SetFetchMode(false);
00719 
00720                 // check table exists
00721                 $save_handler = $this->connection->raiseErrorFn;
00722                 $this->connection->raiseErrorFn = '';
00723                 $cols = $this->MetaColumns($tablename);
00724                 $this->connection->raiseErrorFn = $save_handler;
00725 
00726                 if (isset($savem)) $this->connection->SetFetchMode($savem);
00727                 $ADODB_FETCH_MODE = $save;
00728 
00729                 if ( empty($cols)) {
00730                         return $this->CreateTableSQL($tablename, $flds, $tableoptions);
00731                 }
00732 
00733                 if (is_array($flds)) {
00734                 // Cycle through the update fields, comparing
00735                 // existing fields to fields to update.
00736                 // if the Metatype and size is exactly the
00737                 // same, ignore - by Mark Newham
00738                         $holdflds = array();
00739                         foreach($flds as $k=>$v) {
00740                                 if ( isset($cols[$k]) && is_object($cols[$k]) ) {
00741                                         // If already not allowing nulls, then don't change
00742                                         $obj = $cols[$k];
00743                                         if (isset($obj->not_null) && $obj->not_null)
00744                                                 $v = str_replace('NOT NULL','',$v);
00745 
00746                                         $c = $cols[$k];
00747                                         $ml = $c->max_length;
00748                                         $mt = $this->MetaType($c->type,$ml);
00749                                         if ($ml == -1) $ml = '';
00750                                         if ($mt == 'X') $ml = $v['SIZE'];
00751                                         if (($mt != $v['TYPE']) ||  $ml != $v['SIZE']) {
00752                                                 $holdflds[$k] = $v;
00753                                         }
00754                                 } else {
00755                                         $holdflds[$k] = $v;
00756                                 }
00757                         }
00758                         $flds = $holdflds;
00759                 }
00760 
00761 
00762                 // already exists, alter table instead
00763                 list($lines,$pkey) = $this->_GenFields($flds);
00764                 $alter = 'ALTER TABLE ' . $this->TableName($tablename);
00765                 $sql = array();
00766 
00767                 foreach ( $lines as $id => $v ) {
00768                         if ( isset($cols[$id]) && is_object($cols[$id]) ) {
00769 
00770                                 $flds = Lens_ParseArgs($v,',');
00771 
00772                                 //  We are trying to change the size of the field, if not allowed, simply ignore the request.
00773                                 if ($flds && in_array(strtoupper(substr($flds[0][1],0,4)),$this->invalidResizeTypes4)) continue;
00774 
00775                                 $sql[] = $alter . $this->alterCol . ' ' . $v;
00776                         } else {
00777                                 $sql[] = $alter . $this->addCol . ' ' . $v;
00778                         }
00779                 }
00780 
00781                 return $sql;
00782         }
00783 } // class
00784 ?>
adodb-datadict.inc.php
