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Differences Between: [Versions 310 and 311] [Versions 310 and 400] [Versions 310 and 401] [Versions 310 and 402] [Versions 310 and 403]

   1  <?php
   2  
   3  /**
   4    @version   v5.20.16  12-Jan-2020
   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  */
  14  // security - hide paths
  15  if (!defined('ADODB_DIR')) die();
  16  
  17  class ADODB2_db2 extends ADODB_DataDict {
  18  
  19  	 var $databaseType = 'db2';
  20  	 var $seqField = false;
  21  
  22   	function ActualType($meta)
  23  	 {
  24  	 	 switch($meta) {
  25  	 	 case 'C': return 'VARCHAR';
  26  	 	 case 'XL': return 'CLOB';
  27  	 	 case 'X': return 'VARCHAR(3600)';
  28  
  29  	 	 case 'C2': return 'VARCHAR'; // up to 32K
  30  	 	 case 'X2': return 'VARCHAR(3600)'; // up to 32000, but default page size too small
  31  
  32  	 	 case 'B': return 'BLOB';
  33  
  34  	 	 case 'D': return 'DATE';
  35  	 	 case 'TS':
  36  	 	 case 'T': return 'TIMESTAMP';
  37  
  38  	 	 case 'L': return 'SMALLINT';
  39  	 	 case 'I': return 'INTEGER';
  40  	 	 case 'I1': return 'SMALLINT';
  41  	 	 case 'I2': return 'SMALLINT';
  42  	 	 case 'I4': return 'INTEGER';
  43  	 	 case 'I8': return 'BIGINT';
  44  
  45  	 	 case 'F': return 'DOUBLE';
  46  	 	 case 'N': return 'DECIMAL';
  47  	 	 default:
  48  	 	 	 return $meta;
  49  	 	 }
  50  	 }
  51  
  52  	 // return string must begin with space
  53  	function _CreateSuffix($fname,&$ftype,$fnotnull,$fdefault,$fautoinc,$fconstraint,$funsigned)
  54  	 {
  55  	 	 $suffix = '';
  56  	 	 if ($fautoinc) return ' GENERATED ALWAYS AS IDENTITY'; # as identity start with
  57  	 	 if (strlen($fdefault)) $suffix .= " DEFAULT $fdefault";
  58  	 	 if ($fnotnull) $suffix .= ' NOT NULL';
  59  	 	 if ($fconstraint) $suffix .= ' '.$fconstraint;
  60  	 	 return $suffix;
  61  	 }
  62  
  63  	function AlterColumnSQL($tabname, $flds, $tableflds='',$tableoptions='')
  64  	 {
  65  	 	 if ($this->debug) ADOConnection::outp("AlterColumnSQL not supported");
  66  	 	 return array();
  67  	 }
  68  
  69  
  70  	function DropColumnSQL($tabname, $flds, $tableflds='',$tableoptions='')
  71  	 {
  72  	 	 if ($this->debug) ADOConnection::outp("DropColumnSQL not supported");
  73  	 	 return array();
  74  	 }
  75  
  76  
  77  	function ChangeTableSQL($tablename, $flds, $tableoptions = false)
  78  	 {
  79  
  80  	 	 /**
  81  	 	   Allow basic table changes to DB2 databases
  82  	 	   DB2 will fatally reject changes to non character columns
  83  
  84  	 	 */
  85  
  86  	 	 $validTypes = array("CHAR","VARC");
  87  	 	 $invalidTypes = array("BIGI","BLOB","CLOB","DATE", "DECI","DOUB", "INTE", "REAL","SMAL", "TIME");
  88  	 	 // check table exists
  89  	 	 $cols = $this->MetaColumns($tablename);
  90  	 	 if ( empty($cols)) {
  91  	 	 	 return $this->CreateTableSQL($tablename, $flds, $tableoptions);
  92  	 	 }
  93  
  94  	 	 // already exists, alter table instead
  95  	 	 list($lines,$pkey) = $this->_GenFields($flds);
  96  	 	 $alter = 'ALTER TABLE ' . $this->TableName($tablename);
  97  	 	 $sql = array();
  98  
  99  	 	 foreach ( $lines as $id => $v ) {
 100  	 	 	 if ( isset($cols[$id]) && is_object($cols[$id]) ) {
 101  	 	 	 	 /**
 102  	 	 	 	   If the first field of $v is the fieldname, and
 103  	 	 	 	   the second is the field type/size, we assume its an
 104  	 	 	 	   attempt to modify the column size, so check that it is allowed
 105  	 	 	 	   $v can have an indeterminate number of blanks between the
 106  	 	 	 	   fields, so account for that too
 107  	 	 	 	  */
 108  	 	 	 	 $vargs = explode(' ' , $v);
 109  	 	 	 	 // assume that $vargs[0] is the field name.
 110  	 	 	 	 $i=0;
 111  	 	 	 	 // Find the next non-blank value;
 112  	 	 	 	 for ($i=1;$i<sizeof($vargs);$i++)
 113  	 	 	 	 	 if ($vargs[$i] != '')
 114  	 	 	 	 	 	 break;
 115  
 116  	 	 	 	 // if $vargs[$i] is one of the following, we are trying to change the
 117  	 	 	 	 // size of the field, if not allowed, simply ignore the request.
 118  	 	 	 	 if (in_array(substr($vargs[$i],0,4),$invalidTypes))
 119  	 	 	 	 	 continue;
 120  	 	 	 	 // insert the appropriate DB2 syntax
 121  	 	 	 	 if (in_array(substr($vargs[$i],0,4),$validTypes)) {
 122  	 	 	 	 	 array_splice($vargs,$i,0,array('SET','DATA','TYPE'));
 123  	 	 	 	 }
 124  
 125  	 	 	 	 // Now Look for the NOT NULL statement as this is not allowed in
 126  	 	 	 	 // the ALTER table statement. If it is in there, remove it
 127  	 	 	 	 if (in_array('NOT',$vargs) && in_array('NULL',$vargs)) {
 128  	 	 	 	 	 for ($i=1;$i<sizeof($vargs);$i++)
 129  	 	 	 	 	 if ($vargs[$i] == 'NOT')
 130  	 	 	 	 	 	 break;
 131  	 	 	 	 	 array_splice($vargs,$i,2,'');
 132  	 	 	 	 }
 133  	 	 	 	 $v = implode(' ',$vargs);
 134  	 	 	 	 $sql[] = $alter . $this->alterCol . ' ' . $v;
 135  	 	 	 } else {
 136  	 	 	 	 $sql[] = $alter . $this->addCol . ' ' . $v;
 137  	 	 	 }
 138  	 	 }
 139  
 140  	 	 return $sql;
 141  	 }
 142  
 143  }