[Sommaire] [Imprimer]

   1  <?php
   2  
   3  /**
   4    V4.65 22 July 2005  (c) 2000-2005 John Lim (jlim@natsoft.com.my). All rights reserved.
   5    Released under both BSD license and Lesser GPL library license. 
   6    Whenever there is any discrepancy between the two licenses, 
   7    the BSD license will take precedence.
   8      
   9    Set tabs to 4 for best viewing.
  10   
  11  */
  12  
  13  // security - hide paths
  14  if (!defined('ADODB_DIR')) die();
  15  
  16  class ADODB2_mssql extends ADODB_DataDict {
  17      var $databaseType = 'mssql';
  18      var $dropIndex = 'DROP INDEX %2$s.%1$s';
  19      var $renameTable = "EXEC sp_rename '%s','%s'";
  20      var $renameColumn = "EXEC sp_rename '%s.%s','%s'";
  21  
  22      var $typeX = 'TEXT';  ## Alternatively, set it to VARCHAR(4000)
  23      var $typeXL = 'TEXT';
  24      
  25      //var $alterCol = ' ALTER COLUMN ';
  26      
  27  	function MetaType($t,$len=-1,$fieldobj=false)
  28      {
  29          if (is_object($t)) {
  30              $fieldobj = $t;
  31              $t = $fieldobj->type;
  32              $len = $fieldobj->max_length;
  33          }
  34          
  35          $len = -1; // mysql max_length is not accurate
  36          switch (strtoupper($t)) {
  37          case 'R':
  38          case 'INT': 
  39          case 'INTEGER': return  'I';
  40          case 'BIT':
  41          case 'TINYINT': return  'I1';
  42          case 'SMALLINT': return 'I2';
  43          case 'BIGINT':  return  'I8';
  44          
  45          case 'REAL':
  46          case 'FLOAT': return 'F';
  47          default: return parent::MetaType($t,$len,$fieldobj);
  48          }
  49      }
  50      
  51  	function ActualType($meta)
  52      {
  53          switch(strtoupper($meta)) {
  54  
  55          case 'C': return 'VARCHAR';
  56          case 'XL': return (isset($this)) ? $this->typeXL : 'TEXT';
  57          case 'X': return (isset($this)) ? $this->typeX : 'TEXT'; ## could be varchar(8000), but we want compat with oracle
  58          case 'C2': return 'NVARCHAR';
  59          case 'X2': return 'NTEXT';
  60          
  61          case 'B': return 'IMAGE';
  62              
  63          case 'D': return 'DATETIME';
  64          case 'T': return 'DATETIME';
  65          case 'L': return 'BIT';
  66          
  67          case 'R':        
  68          case 'I': return 'INT'; 
  69          case 'I1': return 'TINYINT';
  70          case 'I2': return 'SMALLINT';
  71          case 'I4': return 'INT';
  72          case 'I8': return 'BIGINT';
  73          
  74          case 'F': return 'REAL';
  75          case 'N': return 'NUMERIC';
  76          default:
  77              return $meta;
  78          }
  79      }
  80      
  81      
  82  	function AddColumnSQL($tabname, $flds)
  83      {
  84          $tabname = $this->TableName ($tabname);
  85          $f = array();
  86          list($lines,$pkey) = $this->_GenFields($flds);
  87          $s = "ALTER TABLE $tabname $this->addCol";
  88          foreach($lines as $v) {
  89              $f[] = "\n $v";
  90          }
  91          $s .= implode(', ',$f);
  92          $sql[] = $s;
  93          return $sql;
  94      }
  95      
  96      /**
  97       * query the name of a default constrain
  98       *
  99       * @param string $tabname table-name
 100       * @param string $colname column-name
 101       * @return boolean/string name of the default constrain or false if there's none
 102       */
 103  	function _get_default_name($tabname,$colname)
 104      {
 105          return $this->connection->GetOne("SELECT sysobjects.name FROM sysobjects JOIN syscolumns ON syscolumns.id=parent_obj AND info=colorder ".
 106              "WHERE syscolumns.name='$colname' AND sysobjects.xtype='D' AND parent_obj=(SELECT id FROM sysobjects WHERE name='$tableoptions' and type='U')");
 107      }
 108  
 109      /**
 110       * Change the definition of one column
 111       *
 112       * Reimplemented because MSSQL need a different handling for DEFAULT, it cant be in an ALTER COLUMN
 113       * 
 114       * @param string $tabname table-name
 115       * @param string $flds column-name and type for the changed column
 116       * @param string $tableflds='' complete defintion of the new table, eg. for postgres, default ''
 117       * @param array/string $tableoptions='' options for the new table see CreateTableSQL, default ''
 118       * @return array with SQL strings
 119       */
 120  	function AlterColumnSQL($tabname, $flds, $tableflds='',$tableoptions='')
 121      {
 122          $tabname = $this->TableName ($tabname);
 123          $sql = array();
 124          list($lines,$pkey) = $this->_GenFields($flds);
 125          $alter = 'ALTER TABLE ' . $tabname . $this->alterCol . ' ';
 126          foreach($lines as $v) {
 127              list($colname) = explode(' ',$v);
 128              // drop a default if it exists
 129              $def_name = $this->_get_default_name($tabname,$colname);
 130              $sql[] = "EXEC sp_unbindefault '$tabname.$colname'";
 131              $sql[] = "DROP DEFAULT $def_name";
 132              if (preg_match("/DEFAULT ([0-9]+|'[^']*')/",$lines,$matches)) {
 133                  $sql[] = $alter . str_replace("DEFAULT $matches[1]",'',$v);
 134                  $sql[] = "ALTER TABLE $tabname ADD CONSTRAINT def_{$tabname}_$colname DEFAULT $matches[1] FOR $colname"; 
 135              } else
 136                  $sql[] = $alter . $v;
 137          }
 138          return $sql;
 139      }
 140      
 141  	function DropColumnSQL($tabname, $flds)
 142      {
 143          $tabname = $this->TableName ($tabname);
 144          if (!is_array($flds))
 145              $flds = explode(',',$flds);
 146          $f = array();
 147          $s = 'ALTER TABLE ' . $tabname;
 148          foreach($flds as $v) {
 149              $f[] = "\n$this->dropCol ".$this->NameQuote($v);
 150          }
 151          $s .= implode(', ',$f);
 152          $sql[] = $s;
 153          return $sql;
 154      }
 155      
 156      // return string must begin with space
 157  	function _CreateSuffix($fname,$ftype,$fnotnull,$fdefault,$fautoinc,$fconstraint)
 158      {    
 159          $suffix = '';
 160          if (strlen($fdefault)) $suffix .= " DEFAULT $fdefault";
 161          if ($fautoinc) $suffix .= ' IDENTITY(1,1)';
 162          if ($fnotnull) $suffix .= ' NOT NULL';
 163          else if ($suffix == '') $suffix .= ' NULL';
 164          if ($fconstraint) $suffix .= ' '.$fconstraint;
 165          return $suffix;
 166      }
 167      
 168      /*
 169  CREATE TABLE 
 170      [ database_name.[ owner ] . | owner. ] table_name 
 171      ( { < column_definition > 
 172          | column_name AS computed_column_expression 
 173          | < table_constraint > ::= [ CONSTRAINT constraint_name ] }
 174  
 175              | [ { PRIMARY KEY | UNIQUE } [ ,...n ] 
 176      ) 
 177  
 178  [ ON { filegroup | DEFAULT } ] 
 179  [ TEXTIMAGE_ON { filegroup | DEFAULT } ] 
 180  
 181  < column_definition > ::= { column_name data_type } 
 182      [ COLLATE < collation_name > ] 
 183      [ [ DEFAULT constant_expression ] 
 184          | [ IDENTITY [ ( seed , increment ) [ NOT FOR REPLICATION ] ] ]
 185      ] 
 186      [ ROWGUIDCOL] 
 187      [ < column_constraint > ] [ ...n ] 
 188  
 189  < column_constraint > ::= [ CONSTRAINT constraint_name ] 
 190      { [ NULL | NOT NULL ] 
 191          | [ { PRIMARY KEY | UNIQUE } 
 192              [ CLUSTERED | NONCLUSTERED ] 
 193              [ WITH FILLFACTOR = fillfactor ] 
 194              [ON {filegroup | DEFAULT} ] ] 
 195          ] 
 196          | [ [ FOREIGN KEY ] 
 197              REFERENCES ref_table [ ( ref_column ) ] 
 198              [ ON DELETE { CASCADE | NO ACTION } ] 
 199              [ ON UPDATE { CASCADE | NO ACTION } ] 
 200              [ NOT FOR REPLICATION ] 
 201          ] 
 202          | CHECK [ NOT FOR REPLICATION ] 
 203          ( logical_expression ) 
 204      } 
 205  
 206  < table_constraint > ::= [ CONSTRAINT constraint_name ] 
 207      { [ { PRIMARY KEY | UNIQUE } 
 208          [ CLUSTERED | NONCLUSTERED ] 
 209          { ( column [ ASC | DESC ] [ ,...n ] ) } 
 210          [ WITH FILLFACTOR = fillfactor ] 
 211          [ ON { filegroup | DEFAULT } ] 
 212      ] 
 213      | FOREIGN KEY 
 214          [ ( column [ ,...n ] ) ] 
 215          REFERENCES ref_table [ ( ref_column [ ,...n ] ) ] 
 216          [ ON DELETE { CASCADE | NO ACTION } ] 
 217          [ ON UPDATE { CASCADE | NO ACTION } ] 
 218          [ NOT FOR REPLICATION ] 
 219      | CHECK [ NOT FOR REPLICATION ] 
 220          ( search_conditions ) 
 221      } 
 222  
 223  
 224      */
 225      
 226      /*
 227      CREATE [ UNIQUE ] [ CLUSTERED | NONCLUSTERED ] INDEX index_name 
 228      ON { table | view } ( column [ ASC | DESC ] [ ,...n ] ) 
 229          [ WITH < index_option > [ ,...n] ] 
 230          [ ON filegroup ]
 231          < index_option > :: = 
 232              { PAD_INDEX | 
 233                  FILLFACTOR = fillfactor | 
 234                  IGNORE_DUP_KEY | 
 235                  DROP_EXISTING | 
 236              STATISTICS_NORECOMPUTE | 
 237              SORT_IN_TEMPDB  
 238          }
 239  */
 240  	function _IndexSQL($idxname, $tabname, $flds, $idxoptions)
 241      {
 242          $sql = array();
 243          
 244          if ( isset($idxoptions['REPLACE']) || isset($idxoptions['DROP']) ) {
 245              $sql[] = sprintf ($this->dropIndex, $idxname, $tabname);
 246              if ( isset($idxoptions['DROP']) )
 247                  return $sql;
 248          }
 249          
 250          if ( empty ($flds) ) {
 251              return $sql;
 252          }
 253          
 254          $unique = isset($idxoptions['UNIQUE']) ? ' UNIQUE' : '';
 255          $clustered = isset($idxoptions['CLUSTERED']) ? ' CLUSTERED' : '';
 256          
 257          if ( is_array($flds) )
 258              $flds = implode(', ',$flds);
 259          $s = 'CREATE' . $unique . $clustered . ' INDEX ' . $idxname . ' ON ' . $tabname . ' (' . $flds . ')';
 260          
 261          if ( isset($idxoptions[$this->upperName]) )
 262              $s .= $idxoptions[$this->upperName];
 263          
 264  
 265          $sql[] = $s;
 266          
 267          return $sql;
 268      }
 269      
 270      
 271  	function _GetSize($ftype, $ty, $fsize, $fprec)
 272      {
 273          switch ($ftype) {
 274          case 'INT':
 275          case 'SMALLINT':
 276          case 'TINYINT':
 277          case 'BIGINT':
 278              return $ftype;
 279          }
 280          if ($ty == 'T') return $ftype;
 281          return parent::_GetSize($ftype, $ty, $fsize, $fprec);    
 282  
 283      }
 284  }
 285  ?>