lib/adodb/adodb-datadict.inc.php

   1 <?php
   2
   3 /**
   4   @version   v5.20.9  21-Dec-2016
   5   @copyright (c) 2000-2013 John Lim (jlim#natsoft.com). All rights reserved.
   6   @copyright (c) 2014      Damien Regad, Mark Newnham and the ADOdb community
   7   Released under both BSD license and Lesser GPL library license.
   8   Whenever there is any discrepancy between the two licenses,
   9   the BSD license will take precedence.
  10
  11   Set tabs to 4 for best viewing.
  12
  13         DOCUMENTATION:
  14
  15                 See adodb/tests/test-datadict.php for docs and examples.
  16 */
  17
  18 /*
  19         Test script for parser
  20 */
  21
  22 // security - hide paths
  23 if (!defined('ADODB_DIR')) die();
  24
  25 function Lens_ParseTest()
  26 {
  27 $str = "`zcol ACOL` NUMBER(32,2) DEFAULT 'The \"cow\" (and Jim''s dog) jumps over the moon' PRIMARY, INTI INT AUTO DEFAULT 0, zcol2\"afs ds";
  28 print "<p>$str</p>";
  29 $a= Lens_ParseArgs($str);
  30 print "<pre>";
  31 print_r($a);
  32 print "</pre>";
  33 }
  34
  35
  36 if (!function_exists('ctype_alnum')) {
  37         function ctype_alnum($text) {
  38                 return preg_match('/^[a-z0-9]*$/i', $text);
  39         }
  40 }
  41
  42 //Lens_ParseTest();
  43
  44 /**
  45         Parse arguments, treat "text" (text) and 'text' as quotation marks.
  46         To escape, use "" or '' or ))
  47
  48         Will read in "abc def" sans quotes, as: abc def
  49         Same with 'abc def'.
  50         However if `abc def`, then will read in as `abc def`
  51
  52         @param endstmtchar    Character that indicates end of statement
  53         @param tokenchars     Include the following characters in tokens apart from A-Z and 0-9
  54         @returns 2 dimensional array containing parsed tokens.
  55 */
  56 function Lens_ParseArgs($args,$endstmtchar=',',$tokenchars='_.-')
  57 {
  58         $pos = 0;
  59         $intoken = false;
  60         $stmtno = 0;
  61         $endquote = false;
  62         $tokens = array();
  63         $tokens[$stmtno] = array();
  64         $max = strlen($args);
  65         $quoted = false;
  66         $tokarr = array();
  67
  68         while ($pos < $max) {
  69                 $ch = substr($args,$pos,1);
  70                 switch($ch) {
  71                 case ' ':
  72                 case "\t":
  73                 case "\n":
  74                 case "\r":
  75                         if (!$quoted) {
  76                                 if ($intoken) {
  77                                         $intoken = false;
  78                                         $tokens[$stmtno][] = implode('',$tokarr);
  79                                 }
  80                                 break;
  81                         }
  82
  83                         $tokarr[] = $ch;
  84                         break;
  85
  86                 case '`':
  87                         if ($intoken) $tokarr[] = $ch;
  88                 case '(':
  89                 case ')':
  90                 case '"':
  91                 case "'":
  92
  93                         if ($intoken) {
  94                                 if (empty($endquote)) {
  95                                         $tokens[$stmtno][] = implode('',$tokarr);
  96                                         if ($ch == '(') $endquote = ')';
  97                                         else $endquote = $ch;
  98                                         $quoted = true;
  99                                         $intoken = true;
 100                                         $tokarr = array();
 101                                 } else if ($endquote == $ch) {
 102                                         $ch2 = substr($args,$pos+1,1);
 103                                         if ($ch2 == $endquote) {
 104                                                 $pos += 1;
 105                                                 $tokarr[] = $ch2;
 106                                         } else {
 107                                                 $quoted = false;
 108                                                 $intoken = false;
 109                                                 $tokens[$stmtno][] = implode('',$tokarr);
 110                                                 $endquote = '';
 111                                         }
 112                                 } else
 113                                         $tokarr[] = $ch;
 114
 115                         }else {
 116
 117                                 if ($ch == '(') $endquote = ')';
 118                                 else $endquote = $ch;
 119                                 $quoted = true;
 120                                 $intoken = true;
 121                                 $tokarr = array();
 122                                 if ($ch == '`') $tokarr[] = '`';
 123                         }
 124                         break;
 125
 126                 default:
 127
 128                         if (!$intoken) {
 129                                 if ($ch == $endstmtchar) {
 130                                         $stmtno += 1;
 131                                         $tokens[$stmtno] = array();
 132                                         break;
 133                                 }
 134
 135                                 $intoken = true;
 136                                 $quoted = false;
 137                                 $endquote = false;
 138                                 $tokarr = array();
 139
 140                         }
 141
 142                         if ($quoted) $tokarr[] = $ch;
 143                         else if (ctype_alnum($ch) || strpos($tokenchars,$ch) !== false) $tokarr[] = $ch;
 144                         else {
 145                                 if ($ch == $endstmtchar) {
 146                                         $tokens[$stmtno][] = implode('',$tokarr);
 147                                         $stmtno += 1;
 148                                         $tokens[$stmtno] = array();
 149                                         $intoken = false;
 150                                         $tokarr = array();
 151                                         break;
 152                                 }
 153                                 $tokens[$stmtno][] = implode('',$tokarr);
 154                                 $tokens[$stmtno][] = $ch;
 155                                 $intoken = false;
 156                         }
 157                 }
 158                 $pos += 1;
 159         }
 160         if ($intoken) $tokens[$stmtno][] = implode('',$tokarr);
 161
 162         return $tokens;
 163 }
 164
 165
 166 class ADODB_DataDict {
 167         var $connection;
 168         var $debug = false;
 169         var $dropTable = 'DROP TABLE %s';
 170         var $renameTable = 'RENAME TABLE %s TO %s';
 171         var $dropIndex = 'DROP INDEX %s';
 172         var $addCol = ' ADD';
 173         var $alterCol = ' ALTER COLUMN';
 174         var $dropCol = ' DROP COLUMN';
 175         var $renameColumn = 'ALTER TABLE %s RENAME COLUMN %s TO %s';    // table, old-column, new-column, column-definitions (not used by default)
 176         var $nameRegex = '\w';
 177         var $nameRegexBrackets = 'a-zA-Z0-9_\(\)';
 178         var $schema = false;
 179         var $serverInfo = array();
 180         var $autoIncrement = false;
 181         var $dataProvider;
 182         var $invalidResizeTypes4 = array('CLOB','BLOB','TEXT','DATE','TIME'); // for changetablesql
 183         var $blobSize = 100;    /// any varchar/char field this size or greater is treated as a blob
 184                                                         /// in other words, we use a text area for editting.
 185
 186         function GetCommentSQL($table,$col)
 187         {
 188                 return false;
 189         }
 190
 191         function SetCommentSQL($table,$col,$cmt)
 192         {
 193                 return false;
 194         }
 195
 196         function MetaTables()
 197         {
 198                 if (!$this->connection->IsConnected()) return array();
 199                 return $this->connection->MetaTables();
 200         }
 201
 202         function MetaColumns($tab, $upper=true, $schema=false)
 203         {
 204                 if (!$this->connection->IsConnected()) return array();
 205                 return $this->connection->MetaColumns($this->TableName($tab), $upper, $schema);
 206         }
 207
 208         function MetaPrimaryKeys($tab,$owner=false,$intkey=false)
 209         {
 210                 if (!$this->connection->IsConnected()) return array();
 211                 return $this->connection->MetaPrimaryKeys($this->TableName($tab), $owner, $intkey);
 212         }
 213
 214         function MetaIndexes($table, $primary = false, $owner = false)
 215         {
 216                 if (!$this->connection->IsConnected()) return array();
 217                 return $this->connection->MetaIndexes($this->TableName($table), $primary, $owner);
 218         }
 219
 220         function MetaType($t,$len=-1,$fieldobj=false)
 221         {
 222                 static $typeMap = array(
 223                 'VARCHAR' => 'C',
 224                 'VARCHAR2' => 'C',
 225                 'CHAR' => 'C',
 226                 'C' => 'C',
 227                 'STRING' => 'C',
 228                 'NCHAR' => 'C',
 229                 'NVARCHAR' => 'C',
 230                 'VARYING' => 'C',
 231                 'BPCHAR' => 'C',
 232                 'CHARACTER' => 'C',
 233                 'INTERVAL' => 'C',  # Postgres
 234                 'MACADDR' => 'C', # postgres
 235                 'VAR_STRING' => 'C', # mysql
 236                 ##
 237                 'LONGCHAR' => 'X',
 238                 'TEXT' => 'X',
 239                 'NTEXT' => 'X',
 240                 'M' => 'X',
 241                 'X' => 'X',
 242                 'CLOB' => 'X',
 243                 'NCLOB' => 'X',
 244                 'LVARCHAR' => 'X',
 245                 ##
 246                 'BLOB' => 'B',
 247                 'IMAGE' => 'B',
 248                 'BINARY' => 'B',
 249                 'VARBINARY' => 'B',
 250                 'LONGBINARY' => 'B',
 251                 'B' => 'B',
 252                 ##
 253                 'YEAR' => 'D', // mysql
 254                 'DATE' => 'D',
 255                 'D' => 'D',
 256                 ##
 257                 'UNIQUEIDENTIFIER' => 'C', # MS SQL Server
 258                 ##
 259                 'TIME' => 'T',
 260                 'TIMESTAMP' => 'T',
 261                 'DATETIME' => 'T',
 262                 'TIMESTAMPTZ' => 'T',
 263                 'SMALLDATETIME' => 'T',
 264                 'T' => 'T',
 265                 'TIMESTAMP WITHOUT TIME ZONE' => 'T', // postgresql
 266                 ##
 267                 'BOOL' => 'L',
 268                 'BOOLEAN' => 'L',
 269                 'BIT' => 'L',
 270                 'L' => 'L',
 271                 ##
 272                 'COUNTER' => 'R',
 273                 'R' => 'R',
 274                 'SERIAL' => 'R', // ifx
 275                 'INT IDENTITY' => 'R',
 276                 ##
 277                 'INT' => 'I',
 278                 'INT2' => 'I',
 279                 'INT4' => 'I',
 280                 'INT8' => 'I',
 281                 'INTEGER' => 'I',
 282                 'INTEGER UNSIGNED' => 'I',
 283                 'SHORT' => 'I',
 284                 'TINYINT' => 'I',
 285                 'SMALLINT' => 'I',
 286                 'I' => 'I',
 287                 ##
 288                 'LONG' => 'N', // interbase is numeric, oci8 is blob
 289                 'BIGINT' => 'N', // this is bigger than PHP 32-bit integers
 290                 'DECIMAL' => 'N',
 291                 'DEC' => 'N',
 292                 'REAL' => 'N',
 293                 'DOUBLE' => 'N',
 294                 'DOUBLE PRECISION' => 'N',
 295                 'SMALLFLOAT' => 'N',
 296                 'FLOAT' => 'N',
 297                 'NUMBER' => 'N',
 298                 'NUM' => 'N',
 299                 'NUMERIC' => 'N',
 300                 'MONEY' => 'N',
 301
 302                 ## informix 9.2
 303                 'SQLINT' => 'I',
 304                 'SQLSERIAL' => 'I',
 305                 'SQLSMINT' => 'I',
 306                 'SQLSMFLOAT' => 'N',
 307                 'SQLFLOAT' => 'N',
 308                 'SQLMONEY' => 'N',
 309                 'SQLDECIMAL' => 'N',
 310                 'SQLDATE' => 'D',
 311                 'SQLVCHAR' => 'C',
 312                 'SQLCHAR' => 'C',
 313                 'SQLDTIME' => 'T',
 314                 'SQLINTERVAL' => 'N',
 315                 'SQLBYTES' => 'B',
 316                 'SQLTEXT' => 'X',
 317                  ## informix 10
 318                 "SQLINT8" => 'I8',
 319                 "SQLSERIAL8" => 'I8',
 320                 "SQLNCHAR" => 'C',
 321                 "SQLNVCHAR" => 'C',
 322                 "SQLLVARCHAR" => 'X',
 323                 "SQLBOOL" => 'L'
 324                 );
 325
 326                 if (!$this->connection->IsConnected()) {
 327                         $t = strtoupper($t);
 328                         if (isset($typeMap[$t])) return $typeMap[$t];
 329                         return 'N';
 330                 }
 331                 return $this->connection->MetaType($t,$len,$fieldobj);
 332         }
 333
 334         function NameQuote($name = NULL,$allowBrackets=false)
 335         {
 336                 if (!is_string($name)) {
 337                         return FALSE;
 338                 }
 339
 340                 $name = trim($name);
 341
 342                 if ( !is_object($this->connection) ) {
 343                         return $name;
 344                 }
 345
 346                 $quote = $this->connection->nameQuote;
 347
 348                 // if name is of the form `name`, quote it
 349                 if ( preg_match('/^`(.+)`$/', $name, $matches) ) {
 350                         return $quote . $matches[1] . $quote;
 351                 }
 352
 353                 // if name contains special characters, quote it
 354                 $regex = ($allowBrackets) ? $this->nameRegexBrackets : $this->nameRegex;
 355
 356                 if ( !preg_match('/^[' . $regex . ']+$/', $name) ) {
 357                         return $quote . $name . $quote;
 358                 }
 359
 360                 return $name;
 361         }
 362
 363         function TableName($name)
 364         {
 365                 if ( $this->schema ) {
 366                         return $this->NameQuote($this->schema) .'.'. $this->NameQuote($name);
 367                 }
 368                 return $this->NameQuote($name);
 369         }
 370
 371         // Executes the sql array returned by GetTableSQL and GetIndexSQL
 372         function ExecuteSQLArray($sql, $continueOnError = true)
 373         {
 374                 $rez = 2;
 375                 $conn = $this->connection;
 376                 $saved = $conn->debug;
 377                 foreach($sql as $line) {
 378
 379                         if ($this->debug) $conn->debug = true;
 380                         $ok = $conn->Execute($line);
 381                         $conn->debug = $saved;
 382                         if (!$ok) {
 383                                 if ($this->debug) ADOConnection::outp($conn->ErrorMsg());
 384                                 if (!$continueOnError) return 0;
 385                                 $rez = 1;
 386                         }
 387                 }
 388                 return $rez;
 389         }
 390
 391         /**
 392                 Returns the actual type given a character code.
 393
 394                 C:  varchar
 395                 X:  CLOB (character large object) or largest varchar size if CLOB is not supported
 396                 C2: Multibyte varchar
 397                 X2: Multibyte CLOB
 398
 399                 B:  BLOB (binary large object)
 400
 401                 D:  Date
 402                 T:  Date-time
 403                 L:  Integer field suitable for storing booleans (0 or 1)
 404                 I:  Integer
 405                 F:  Floating point number
 406                 N:  Numeric or decimal number
 407         */
 408
 409         function ActualType($meta)
 410         {
 411                 return $meta;
 412         }
 413
 414         function CreateDatabase($dbname,$options=false)
 415         {
 416                 $options = $this->_Options($options);
 417                 $sql = array();
 418
 419                 $s = 'CREATE DATABASE ' . $this->NameQuote($dbname);
 420                 if (isset($options[$this->upperName]))
 421                         $s .= ' '.$options[$this->upperName];
 422
 423                 $sql[] = $s;
 424                 return $sql;
 425         }
 426
 427         /*
 428          Generates the SQL to create index. Returns an array of sql strings.
 429         */
 430         function CreateIndexSQL($idxname, $tabname, $flds, $idxoptions = false)
 431         {
 432                 if (!is_array($flds)) {
 433                         $flds = explode(',',$flds);
 434                 }
 435
 436                 foreach($flds as $key => $fld) {
 437                         # some indexes can use partial fields, eg. index first 32 chars of "name" with NAME(32)
 438                         $flds[$key] = $this->NameQuote($fld,$allowBrackets=true);
 439                 }
 440
 441                 return $this->_IndexSQL($this->NameQuote($idxname), $this->TableName($tabname), $flds, $this->_Options($idxoptions));
 442         }
 443
 444         function DropIndexSQL ($idxname, $tabname = NULL)
 445         {
 446                 return array(sprintf($this->dropIndex, $this->NameQuote($idxname), $this->TableName($tabname)));
 447         }
 448
 449         function SetSchema($schema)
 450         {
 451                 $this->schema = $schema;
 452         }
 453
 454         function AddColumnSQL($tabname, $flds)
 455         {
 456                 $tabname = $this->TableName ($tabname);
 457                 $sql = array();
 458                 list($lines,$pkey,$idxs) = $this->_GenFields($flds);
 459                 // genfields can return FALSE at times
 460                 if ($lines  == null) $lines = array();
 461                 $alter = 'ALTER TABLE ' . $tabname . $this->addCol . ' ';
 462                 foreach($lines as $v) {
 463                         $sql[] = $alter . $v;
 464                 }
 465                 if (is_array($idxs)) {
 466                         foreach($idxs as $idx => $idxdef) {
 467                                 $sql_idxs = $this->CreateIndexSql($idx, $tabname, $idxdef['cols'], $idxdef['opts']);
 468                                 $sql = array_merge($sql, $sql_idxs);
 469                         }
 470                 }
 471                 return $sql;
 472         }
 473
 474         /**
 475          * Change the definition of one column
 476          *
 477          * As some DBM's can't do that on there own, you need to supply the complete defintion of the new table,
 478          * to allow, recreating the table and copying the content over to the new table
 479          * @param string $tabname table-name
 480          * @param string $flds column-name and type for the changed column
 481          * @param string $tableflds='' complete defintion of the new table, eg. for postgres, default ''
 482          * @param array/string $tableoptions='' options for the new table see CreateTableSQL, default ''
 483          * @return array with SQL strings
 484          */
 485         function AlterColumnSQL($tabname, $flds, $tableflds='',$tableoptions='')
 486         {
 487                 $tabname = $this->TableName ($tabname);
 488                 $sql = array();
 489                 list($lines,$pkey,$idxs) = $this->_GenFields($flds);
 490                 // genfields can return FALSE at times
 491                 if ($lines == null) $lines = array();
 492                 $alter = 'ALTER TABLE ' . $tabname . $this->alterCol . ' ';
 493                 foreach($lines as $v) {
 494                         $sql[] = $alter . $v;
 495                 }
 496                 if (is_array($idxs)) {
 497                         foreach($idxs as $idx => $idxdef) {
 498                                 $sql_idxs = $this->CreateIndexSql($idx, $tabname, $idxdef['cols'], $idxdef['opts']);
 499                                 $sql = array_merge($sql, $sql_idxs);
 500                         }
 501
 502                 }
 503                 return $sql;
 504         }
 505
 506         /**
 507          * Rename one column
 508          *
 509          * Some DBM's can only do this together with changeing the type of the column (even if that stays the same, eg. mysql)
 510          * @param string $tabname table-name
 511          * @param string $oldcolumn column-name to be renamed
 512          * @param string $newcolumn new column-name
 513          * @param string $flds='' complete column-defintion-string like for AddColumnSQL, only used by mysql atm., default=''
 514          * @return array with SQL strings
 515          */
 516         function RenameColumnSQL($tabname,$oldcolumn,$newcolumn,$flds='')
 517         {
 518                 $tabname = $this->TableName ($tabname);
 519                 if ($flds) {
 520                         list($lines,$pkey,$idxs) = $this->_GenFields($flds);
 521                         // genfields can return FALSE at times
 522                         if ($lines == null) $lines = array();
 523                         $first  = current($lines);
 524                         list(,$column_def) = preg_split("/[\t ]+/",$first,2);
 525                 }
 526                 return array(sprintf($this->renameColumn,$tabname,$this->NameQuote($oldcolumn),$this->NameQuote($newcolumn),$column_def));
 527         }
 528
 529         /**
 530          * Drop one column
 531          *
 532          * Some DBM's can't do that on there own, you need to supply the complete defintion of the new table,
 533          * to allow, recreating the table and copying the content over to the new table
 534          * @param string $tabname table-name
 535          * @param string $flds column-name and type for the changed column
 536          * @param string $tableflds='' complete defintion of the new table, eg. for postgres, default ''
 537          * @param array/string $tableoptions='' options for the new table see CreateTableSQL, default ''
 538          * @return array with SQL strings
 539          */
 540         function DropColumnSQL($tabname, $flds, $tableflds='',$tableoptions='')
 541         {
 542                 $tabname = $this->TableName ($tabname);
 543                 if (!is_array($flds)) $flds = explode(',',$flds);
 544                 $sql = array();
 545                 $alter = 'ALTER TABLE ' . $tabname . $this->dropCol . ' ';
 546                 foreach($flds as $v) {
 547                         $sql[] = $alter . $this->NameQuote($v);
 548                 }
 549                 return $sql;
 550         }
 551
 552         function DropTableSQL($tabname)
 553         {
 554                 return array (sprintf($this->dropTable, $this->TableName($tabname)));
 555         }
 556
 557         function RenameTableSQL($tabname,$newname)
 558         {
 559                 return array (sprintf($this->renameTable, $this->TableName($tabname),$this->TableName($newname)));
 560         }
 561
 562         /**
 563          Generate the SQL to create table. Returns an array of sql strings.
 564         */
 565         function CreateTableSQL($tabname, $flds, $tableoptions=array())
 566         {
 567                 list($lines,$pkey,$idxs) = $this->_GenFields($flds, true);
 568                 // genfields can return FALSE at times
 569                 if ($lines == null) $lines = array();
 570
 571                 $taboptions = $this->_Options($tableoptions);
 572                 $tabname = $this->TableName ($tabname);
 573                 $sql = $this->_TableSQL($tabname,$lines,$pkey,$taboptions);
 574
 575                 // ggiunta - 2006/10/12 - KLUDGE:
 576         // if we are on autoincrement, and table options includes REPLACE, the
 577         // autoincrement sequence has already been dropped on table creation sql, so
 578         // we avoid passing REPLACE to trigger creation code. This prevents
 579         // creating sql that double-drops the sequence
 580         if ($this->autoIncrement && isset($taboptions['REPLACE']))
 581                 unset($taboptions['REPLACE']);
 582                 $tsql = $this->_Triggers($tabname,$taboptions);
 583                 foreach($tsql as $s) $sql[] = $s;
 584
 585                 if (is_array($idxs)) {
 586                         foreach($idxs as $idx => $idxdef) {
 587                                 $sql_idxs = $this->CreateIndexSql($idx, $tabname,  $idxdef['cols'], $idxdef['opts']);
 588                                 $sql = array_merge($sql, $sql_idxs);
 589                         }
 590                 }
 591
 592                 return $sql;
 593         }
 594
 595
 596
 597         function _GenFields($flds,$widespacing=false)
 598         {
 599                 if (is_string($flds)) {
 600                         $padding = '     ';
 601                         $txt = $flds.$padding;
 602                         $flds = array();
 603                         $flds0 = Lens_ParseArgs($txt,',');
 604                         $hasparam = false;
 605                         foreach($flds0 as $f0) {
 606                                 $f1 = array();
 607                                 foreach($f0 as $token) {
 608                                         switch (strtoupper($token)) {
 609                                         case 'INDEX':
 610                                                 $f1['INDEX'] = '';
 611                                                 // fall through intentionally
 612                                         case 'CONSTRAINT':
 613                                         case 'DEFAULT':
 614                                                 $hasparam = $token;
 615                                                 break;
 616                                         default:
 617                                                 if ($hasparam) $f1[$hasparam] = $token;
 618                                                 else $f1[] = $token;
 619                                                 $hasparam = false;
 620                                                 break;
 621                                         }
 622                                 }
 623                                 // 'index' token without a name means single column index: name it after column
 624                                 if (array_key_exists('INDEX', $f1) && $f1['INDEX'] == '') {
 625                                         $f1['INDEX'] = isset($f0['NAME']) ? $f0['NAME'] : $f0[0];
 626                                         // check if column name used to create an index name was quoted
 627                                         if (($f1['INDEX'][0] == '"' || $f1['INDEX'][0] == "'" || $f1['INDEX'][0] == "`") &&
 628                                                 ($f1['INDEX'][0] == substr($f1['INDEX'], -1))) {
 629                                                 $f1['INDEX'] = $f1['INDEX'][0].'idx_'.substr($f1['INDEX'], 1, -1).$f1['INDEX'][0];
 630                                         }
 631                                         else
 632                                                 $f1['INDEX'] = 'idx_'.$f1['INDEX'];
 633                                 }
 634                                 // reset it, so we don't get next field 1st token as INDEX...
 635                                 $hasparam = false;
 636
 637                                 $flds[] = $f1;
 638
 639                         }
 640                 }
 641                 $this->autoIncrement = false;
 642                 $lines = array();
 643                 $pkey = array();
 644                 $idxs = array();
 645                 foreach($flds as $fld) {
 646                         $fld = _array_change_key_case($fld);
 647
 648                         $fname = false;
 649                         $fdefault = false;
 650                         $fautoinc = false;
 651                         $ftype = false;
 652                         $fsize = false;
 653                         $fprec = false;
 654                         $fprimary = false;
 655                         $fnoquote = false;
 656                         $fdefts = false;
 657                         $fdefdate = false;
 658                         $fconstraint = false;
 659                         $fnotnull = false;
 660                         $funsigned = false;
 661                         $findex = '';
 662                         $funiqueindex = false;
 663
 664                         //-----------------
 665                         // Parse attributes
 666                         foreach($fld as $attr => $v) {
 667                                 if ($attr == 2 && is_numeric($v)) $attr = 'SIZE';
 668                                 else if (is_numeric($attr) && $attr > 1 && !is_numeric($v)) $attr = strtoupper($v);
 669
 670                                 switch($attr) {
 671                                 case '0':
 672                                 case 'NAME':    $fname = $v; break;
 673                                 case '1':
 674                                 case 'TYPE':    $ty = $v; $ftype = $this->ActualType(strtoupper($v)); break;
 675
 676                                 case 'SIZE':
 677                                                                 $dotat = strpos($v,'.'); if ($dotat === false) $dotat = strpos($v,',');
 678                                                                 if ($dotat === false) $fsize = $v;
 679                                                                 else {
 680                                                                         $fsize = substr($v,0,$dotat);
 681                                                                         $fprec = substr($v,$dotat+1);
 682                                                                 }
 683                                                                 break;
 684                                 case 'UNSIGNED': $funsigned = true; break;
 685                                 case 'AUTOINCREMENT':
 686                                 case 'AUTO':    $fautoinc = true; $fnotnull = true; break;
 687                                 case 'KEY':
 688                 // a primary key col can be non unique in itself (if key spans many cols...)
 689                                 case 'PRIMARY': $fprimary = $v; $fnotnull = true; /*$funiqueindex = true;*/ break;
 690                                 case 'DEF':
 691                                 case 'DEFAULT': $fdefault = $v; break;
 692                                 case 'NOTNULL': $fnotnull = $v; break;
 693                                 case 'NOQUOTE': $fnoquote = $v; break;
 694                                 case 'DEFDATE': $fdefdate = $v; break;
 695                                 case 'DEFTIMESTAMP': $fdefts = $v; break;
 696                                 case 'CONSTRAINT': $fconstraint = $v; break;
 697                                 // let INDEX keyword create a 'very standard' index on column
 698                                 case 'INDEX': $findex = $v; break;
 699                                 case 'UNIQUE': $funiqueindex = true; break;
 700                                 } //switch
 701                         } // foreach $fld
 702
 703                         //--------------------
 704                         // VALIDATE FIELD INFO
 705                         if (!strlen($fname)) {
 706                                 if ($this->debug) ADOConnection::outp("Undefined NAME");
 707                                 return false;
 708                         }
 709
 710                         $fid = strtoupper(preg_replace('/^`(.+)`$/', '$1', $fname));
 711                         $fname = $this->NameQuote($fname);
 712
 713                         if (!strlen($ftype)) {
 714                                 if ($this->debug) ADOConnection::outp("Undefined TYPE for field '$fname'");
 715                                 return false;
 716                         } else {
 717                                 $ftype = strtoupper($ftype);
 718                         }
 719
 720                         $ftype = $this->_GetSize($ftype, $ty, $fsize, $fprec);
 721
 722                         if ($ty == 'X' || $ty == 'X2' || $ty == 'B') $fnotnull = false; // some blob types do not accept nulls
 723
 724                         if ($fprimary) $pkey[] = $fname;
 725
 726                         // some databases do not allow blobs to have defaults
 727                         if ($ty == 'X') $fdefault = false;
 728
 729                         // build list of indexes
 730                         if ($findex != '') {
 731                                 if (array_key_exists($findex, $idxs)) {
 732                                         $idxs[$findex]['cols'][] = ($fname);
 733                                         if (in_array('UNIQUE', $idxs[$findex]['opts']) != $funiqueindex) {
 734                                                 if ($this->debug) ADOConnection::outp("Index $findex defined once UNIQUE and once not");
 735                                         }
 736                                         if ($funiqueindex && !in_array('UNIQUE', $idxs[$findex]['opts']))
 737                                                 $idxs[$findex]['opts'][] = 'UNIQUE';
 738                                 }
 739                                 else
 740                                 {
 741                                         $idxs[$findex] = array();
 742                                         $idxs[$findex]['cols'] = array($fname);
 743                                         if ($funiqueindex)
 744                                                 $idxs[$findex]['opts'] = array('UNIQUE');
 745                                         else
 746                                                 $idxs[$findex]['opts'] = array();
 747                                 }
 748                         }
 749
 750                         //--------------------
 751                         // CONSTRUCT FIELD SQL
 752                         if ($fdefts) {
 753                                 if (substr($this->connection->databaseType,0,5) == 'mysql') {
 754                                         $ftype = 'TIMESTAMP';
 755                                 } else {
 756                                         $fdefault = $this->connection->sysTimeStamp;
 757                                 }
 758                         } else if ($fdefdate) {
 759                                 if (substr($this->connection->databaseType,0,5) == 'mysql') {
 760                                         $ftype = 'TIMESTAMP';
 761                                 } else {
 762                                         $fdefault = $this->connection->sysDate;
 763                                 }
 764                         } else if ($fdefault !== false && !$fnoquote) {
 765                                 if ($ty == 'C' or $ty == 'X' or
 766                                         ( substr($fdefault,0,1) != "'" && !is_numeric($fdefault))) {
 767
 768                                         if (($ty == 'D' || $ty == 'T') && strtolower($fdefault) != 'null') {
 769                                                 // convert default date into database-aware code
 770                                                 if ($ty == 'T')
 771                                                 {
 772                                                         $fdefault = $this->connection->DBTimeStamp($fdefault);
 773                                                 }
 774                                                 else
 775                                                 {
 776                                                         $fdefault = $this->connection->DBDate($fdefault);
 777                                                 }
 778                                         }
 779                                         else
 780                                         if (strlen($fdefault) != 1 && substr($fdefault,0,1) == ' ' && substr($fdefault,strlen($fdefault)-1) == ' ')
 781                                                 $fdefault = trim($fdefault);
 782                                         else if (strtolower($fdefault) != 'null')
 783                                                 $fdefault = $this->connection->qstr($fdefault);
 784                                 }
 785                         }
 786                         $suffix = $this->_CreateSuffix($fname,$ftype,$fnotnull,$fdefault,$fautoinc,$fconstraint,$funsigned);
 787
 788                         // add index creation
 789                         if ($widespacing) $fname = str_pad($fname,24);
 790
 791                          // check for field names appearing twice
 792             if (array_key_exists($fid, $lines)) {
 793                  ADOConnection::outp("Field '$fname' defined twice");
 794             }
 795
 796                         $lines[$fid] = $fname.' '.$ftype.$suffix;
 797
 798                         if ($fautoinc) $this->autoIncrement = true;
 799                 } // foreach $flds
 800
 801                 return array($lines,$pkey,$idxs);
 802         }
 803
 804         /**
 805                  GENERATE THE SIZE PART OF THE DATATYPE
 806                         $ftype is the actual type
 807                         $ty is the type defined originally in the DDL
 808         */
 809         function _GetSize($ftype, $ty, $fsize, $fprec)
 810         {
 811                 if (strlen($fsize) && $ty != 'X' && $ty != 'B' && strpos($ftype,'(') === false) {
 812                         $ftype .= "(".$fsize;
 813                         if (strlen($fprec)) $ftype .= ",".$fprec;
 814                         $ftype .= ')';
 815                 }
 816                 return $ftype;
 817         }
 818
 819
 820         // return string must begin with space
 821         function _CreateSuffix($fname,&$ftype,$fnotnull,$fdefault,$fautoinc,$fconstraint,$funsigned)
 822         {
 823                 $suffix = '';
 824                 if (strlen($fdefault)) $suffix .= " DEFAULT $fdefault";
 825                 if ($fnotnull) $suffix .= ' NOT NULL';
 826                 if ($fconstraint) $suffix .= ' '.$fconstraint;
 827                 return $suffix;
 828         }
 829
 830         function _IndexSQL($idxname, $tabname, $flds, $idxoptions)
 831         {
 832                 $sql = array();
 833
 834                 if ( isset($idxoptions['REPLACE']) || isset($idxoptions['DROP']) ) {
 835                         $sql[] = sprintf ($this->dropIndex, $idxname);
 836                         if ( isset($idxoptions['DROP']) )
 837                                 return $sql;
 838                 }
 839
 840                 if ( empty ($flds) ) {
 841                         return $sql;
 842                 }
 843
 844                 $unique = isset($idxoptions['UNIQUE']) ? ' UNIQUE' : '';
 845
 846                 $s = 'CREATE' . $unique . ' INDEX ' . $idxname . ' ON ' . $tabname . ' ';
 847
 848                 if ( isset($idxoptions[$this->upperName]) )
 849                         $s .= $idxoptions[$this->upperName];
 850
 851                 if ( is_array($flds) )
 852                         $flds = implode(', ',$flds);
 853                 $s .= '(' . $flds . ')';
 854                 $sql[] = $s;
 855
 856                 return $sql;
 857         }
 858
 859         function _DropAutoIncrement($tabname)
 860         {
 861                 return false;
 862         }
 863
 864         function _TableSQL($tabname,$lines,$pkey,$tableoptions)
 865         {
 866                 $sql = array();
 867
 868                 if (isset($tableoptions['REPLACE']) || isset ($tableoptions['DROP'])) {
 869                         $sql[] = sprintf($this->dropTable,$tabname);
 870                         if ($this->autoIncrement) {
 871                                 $sInc = $this->_DropAutoIncrement($tabname);
 872                                 if ($sInc) $sql[] = $sInc;
 873                         }
 874                         if ( isset ($tableoptions['DROP']) ) {
 875                                 return $sql;
 876                         }
 877                 }
 878                 $s = "CREATE TABLE $tabname (\n";
 879                 $s .= implode(",\n", $lines);
 880                 if (sizeof($pkey)>0) {
 881                         $s .= ",\n                 PRIMARY KEY (";
 882                         $s .= implode(", ",$pkey).")";
 883                 }
 884                 if (isset($tableoptions['CONSTRAINTS']))
 885                         $s .= "\n".$tableoptions['CONSTRAINTS'];
 886
 887                 if (isset($tableoptions[$this->upperName.'_CONSTRAINTS']))
 888                         $s .= "\n".$tableoptions[$this->upperName.'_CONSTRAINTS'];
 889
 890                 $s .= "\n)";
 891                 if (isset($tableoptions[$this->upperName])) $s .= $tableoptions[$this->upperName];
 892                 $sql[] = $s;
 893
 894                 return $sql;
 895         }
 896
 897         /**
 898                 GENERATE TRIGGERS IF NEEDED
 899                 used when table has auto-incrementing field that is emulated using triggers
 900         */
 901         function _Triggers($tabname,$taboptions)
 902         {
 903                 return array();
 904         }
 905
 906         /**
 907                 Sanitize options, so that array elements with no keys are promoted to keys
 908         */
 909         function _Options($opts)
 910         {
 911                 if (!is_array($opts)) return array();
 912                 $newopts = array();
 913                 foreach($opts as $k => $v) {
 914                         if (is_numeric($k)) $newopts[strtoupper($v)] = $v;
 915                         else $newopts[strtoupper($k)] = $v;
 916                 }
 917                 return $newopts;
 918         }
 919
 920
 921         function _getSizePrec($size)
 922         {
 923                 $fsize = false;
 924                 $fprec = false;
 925                 $dotat = strpos($size,'.');
 926                 if ($dotat === false) $dotat = strpos($size,',');
 927                 if ($dotat === false) $fsize = $size;
 928                 else {
 929                         $fsize = substr($size,0,$dotat);
 930                         $fprec = substr($size,$dotat+1);
 931                 }
 932                 return array($fsize, $fprec);
 933         }
 934
 935         /**
 936         "Florian Buzin [ easywe ]" <florian.buzin#easywe.de>
 937
 938         This function changes/adds new fields to your table. You don't
 939         have to know if the col is new or not. It will check on its own.
 940         */
 941         function ChangeTableSQL($tablename, $flds, $tableoptions = false, $dropOldFlds=false)
 942         {
 943         global $ADODB_FETCH_MODE;
 944
 945                 $save = $ADODB_FETCH_MODE;
 946                 $ADODB_FETCH_MODE = ADODB_FETCH_ASSOC;
 947                 if ($this->connection->fetchMode !== false) $savem = $this->connection->SetFetchMode(false);
 948
 949                 // check table exists
 950                 $save_handler = $this->connection->raiseErrorFn;
 951                 $this->connection->raiseErrorFn = '';
 952                 $cols = $this->MetaColumns($tablename);
 953                 $this->connection->raiseErrorFn = $save_handler;
 954
 955                 if (isset($savem)) $this->connection->SetFetchMode($savem);
 956                 $ADODB_FETCH_MODE = $save;
 957
 958                 if ( empty($cols)) {
 959                         return $this->CreateTableSQL($tablename, $flds, $tableoptions);
 960                 }
 961
 962                 if (is_array($flds)) {
 963                 // Cycle through the update fields, comparing
 964                 // existing fields to fields to update.
 965                 // if the Metatype and size is exactly the
 966                 // same, ignore - by Mark Newham
 967                         $holdflds = array();
 968                         foreach($flds as $k=>$v) {
 969                                 if ( isset($cols[$k]) && is_object($cols[$k]) ) {
 970                                         // If already not allowing nulls, then don't change
 971                                         $obj = $cols[$k];
 972                                         if (isset($obj->not_null) && $obj->not_null)
 973                                                 $v = str_replace('NOT NULL','',$v);
 974                                         if (isset($obj->auto_increment) && $obj->auto_increment && empty($v['AUTOINCREMENT']))
 975                                             $v = str_replace('AUTOINCREMENT','',$v);
 976
 977                                         $c = $cols[$k];
 978                                         $ml = $c->max_length;
 979                                         $mt = $this->MetaType($c->type,$ml);
 980
 981                                         if (isset($c->scale)) $sc = $c->scale;
 982                                         else $sc = 99; // always force change if scale not known.
 983
 984                                         if ($sc == -1) $sc = false;
 985                                         list($fsize, $fprec) = $this->_getSizePrec($v['SIZE']);
 986
 987                                         if ($ml == -1) $ml = '';
 988                                         if ($mt == 'X') $ml = $v['SIZE'];
 989                                         if (($mt != $v['TYPE']) || ($ml != $fsize || $sc != $fprec) || (isset($v['AUTOINCREMENT']) && $v['AUTOINCREMENT'] != $obj->auto_increment)) {
 990                                                 $holdflds[$k] = $v;
 991                                         }
 992                                 } else {
 993                                         $holdflds[$k] = $v;
 994                                 }
 995                         }
 996                         $flds = $holdflds;
 997                 }
 998
 999
1000                 // already exists, alter table instead
1001                 list($lines,$pkey,$idxs) = $this->_GenFields($flds);
1002                 // genfields can return FALSE at times
1003                 if ($lines == null) $lines = array();
1004                 $alter = 'ALTER TABLE ' . $this->TableName($tablename);
1005                 $sql = array();
1006
1007                 foreach ( $lines as $id => $v ) {
1008                         if ( isset($cols[$id]) && is_object($cols[$id]) ) {
1009
1010                                 $flds = Lens_ParseArgs($v,',');
1011
1012                                 //  We are trying to change the size of the field, if not allowed, simply ignore the request.
1013                                 // $flds[1] holds the type, $flds[2] holds the size -postnuke addition
1014                                 if ($flds && in_array(strtoupper(substr($flds[0][1],0,4)),$this->invalidResizeTypes4)
1015                                  && (isset($flds[0][2]) && is_numeric($flds[0][2]))) {
1016                                         if ($this->debug) ADOConnection::outp(sprintf("<h3>%s cannot be changed to %s currently</h3>", $flds[0][0], $flds[0][1]));
1017                                         #echo "<h3>$this->alterCol cannot be changed to $flds currently</h3>";
1018                                         continue;
1019                                 }
1020                                 $sql[] = $alter . $this->alterCol . ' ' . $v;
1021                         } else {
1022                                 $sql[] = $alter . $this->addCol . ' ' . $v;
1023                         }
1024                 }
1025
1026                 if ($dropOldFlds) {
1027                         foreach ( $cols as $id => $v )
1028                             if ( !isset($lines[$id]) )
1029                                         $sql[] = $alter . $this->dropCol . ' ' . $v->name;
1030                 }
1031                 return $sql;
1032         }
1033 } // class