WebSVN – svnkaklik – //web/kaklik's_web/torrentflux/adodb/drivers/adodb-db2.inc.php

<?php
/* 
  V4.80 8 Mar 2006  (c) 2006 John Lim (jlim@natsoft.com.my). All rights reserved.

This is a version of the ADODB driver for DB2.  It uses the 'ibm_db2' PECL extension for PHP
  (http://pecl.php.net/package/ibm_db2), which in turn requires DB2 V8.2.2.

  Tested with PHP 5.1.1 and Apache 2.0.55 on Windows XP SP2.

  This file was ported from "adodb-odbc.inc.php" by Larry Menard, "larry.menard@rogers.com".
  I ripped out what I believed to be a lot of redundant or obsolete code, but there are
  probably still some remnants of the ODBC support in this file; I'm relying on reviewers
  of this code to point out any other things that can be removed.
*/

// security - hide paths
if (!defined('ADODB_DIR')) die();

  define("_ADODB_DB2_LAYER", 2 );
         
/*--------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------*/


class ADODB_db2 extends ADOConnection {
        var $databaseType = "db2";      
        var $fmtDate = "'Y-m-d'";
        var $fmtTimeStamp = "'Y-m-d, h:i:sA'";
        var $replaceQuote = "''"; // string to use to replace quotes
        var $dataProvider = "db2";
        var $hasAffectedRows = true;

        var $binmode = DB2_BINARY;

        var $useFetchArray = false; // setting this to true will make array elements in FETCH_ASSOC mode case-sensitive
                                                                // breaking backward-compat
        var $_bindInputArray = false;   
        var $_genSeqSQL = "create table %s (id integer)";
        var $_autocommit = true;
        var $_haserrorfunctions = true;
        var $_lastAffectedRows = 0;
        var $uCaseTables = true; // for meta* functions, uppercase table names
        
        function ADODB_db2() 
        {       
                $this->_haserrorfunctions = ADODB_PHPVER >= 0x4050;
        }
        
                // returns true or false
        function _connect($argDSN, $argUsername, $argPassword, $argDatabasename)
        {
                global $php_errormsg;
                
                if (!function_exists('db2_connect')) {
                        ADOConnection::outp("Warning: The old ODBC based DB2 driver has been renamed 'odbc_db2'. This ADOdb driver calls PHP's native db2 extension.");
                        return null;
                }
                // This needs to be set before the connect().
                // Replaces the odbc_binmode() call that was in Execute()
                ini_set('ibm_db2.binmode', $this->binmode);

                if ($argDatabasename) {
                        $this->_connectionID = db2_connect($argDatabasename,$argUsername,$argPassword);
                } else {
                        $this->_connectionID = db2_connect($argDSN,$argUsername,$argPassword);
                }
                if (isset($php_errormsg)) $php_errormsg = '';

                // For db2_connect(), there is an optional 4th arg.  If present, it must be
                // an array of valid options.  So far, we don't use them.

                $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
                if (isset($this->connectStmt)) $this->Execute($this->connectStmt);
                
                return $this->_connectionID != false;
        }
        
        // returns true or false
        function _pconnect($argDSN, $argUsername, $argPassword, $argDatabasename)
        {
                global $php_errormsg;
        
                if (!function_exists('db2_connect')) return null;
                
                // This needs to be set before the connect().
                // Replaces the odbc_binmode() call that was in Execute()
                ini_set('ibm_db2.binmode', $this->binmode);

                if (isset($php_errormsg)) $php_errormsg = '';
                $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
                
                if ($argDatabasename) {
                        $this->_connectionID = db2_pconnect($argDatabasename,$argUsername,$argPassword);
                } else {
                        $this->_connectionID = db2_pconnect($argDSN,$argUsername,$argPassword);
                }
                if (isset($php_errormsg)) $php_errormsg = '';

                $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
                if ($this->_connectionID && $this->autoRollback) @db2_rollback($this->_connectionID);
                if (isset($this->connectStmt)) $this->Execute($this->connectStmt);
                
                return $this->_connectionID != false;
        }

        
        function ServerInfo()
        {
        
                if (!empty($this->host) && ADODB_PHPVER >= 0x4300) {
                        $dsn = strtoupper($this->host);
                        $first = true;
                        $found = false;
                        
                        if (!function_exists('db2_data_source')) return false;
                        
                        while(true) {
                                
                                $rez = @db2_data_source($this->_connectionID,
                                        $first ? SQL_FETCH_FIRST : SQL_FETCH_NEXT);
                                $first = false;
                                if (!is_array($rez)) break;
                                if (strtoupper($rez['server']) == $dsn) {
                                        $found = true;
                                        break;
                                }
                        } 
                        if (!$found) return ADOConnection::ServerInfo();
                        if (!isset($rez['version'])) $rez['version'] = '';
                        return $rez;
                } else {
                        return ADOConnection::ServerInfo();
                }
        }

        
        function CreateSequence($seqname='adodbseq',$start=1)
        {
                if (empty($this->_genSeqSQL)) return false;
                $ok = $this->Execute(sprintf($this->_genSeqSQL,$seqname));
                if (!$ok) return false;
                $start -= 1;
                return $this->Execute("insert into $seqname values($start)");
        }
        
        var $_dropSeqSQL = 'drop table %s';
        function DropSequence($seqname)
        {
                if (empty($this->_dropSeqSQL)) return false;
                return $this->Execute(sprintf($this->_dropSeqSQL,$seqname));
        }
        
        /*
                This algorithm is not very efficient, but works even if table locking
                is not available.
                
                Will return false if unable to generate an ID after $MAXLOOPS attempts.
        */
        function GenID($seq='adodbseq',$start=1)
        {       
                // if you have to modify the parameter below, your database is overloaded,
                // or you need to implement generation of id's yourself!
                $MAXLOOPS = 100;
                while (--$MAXLOOPS>=0) {
                        $num = $this->GetOne("select id from $seq");
                        if ($num === false) {
                                $this->Execute(sprintf($this->_genSeqSQL ,$seq));       
                                $start -= 1;
                                $num = '0';
                                $ok = $this->Execute("insert into $seq values($start)");
                                if (!$ok) return false;
                        } 
                        $this->Execute("update $seq set id=id+1 where id=$num");
                        
                        if ($this->affected_rows() > 0) {
                                $num += 1;
                                $this->genID = $num;
                                return $num;
                        }
                }
                if ($fn = $this->raiseErrorFn) {
                        $fn($this->databaseType,'GENID',-32000,"Unable to generate unique id after $MAXLOOPS attempts",$seq,$num);
                }
                return false;
        }


        function ErrorMsg()
        {
                if ($this->_haserrorfunctions) {
                        if ($this->_errorMsg !== false) return $this->_errorMsg;
                        if (empty($this->_connectionID)) return @db2_errormsg();
                        return @db2_errormsg($this->_connectionID);
                } else return ADOConnection::ErrorMsg();
        }
        
        function ErrorNo()
        {
                
                if ($this->_haserrorfunctions) {
                        if ($this->_errorCode !== false) {
                                // bug in 4.0.6, error number can be corrupted string (should be 6 digits)
                                return (strlen($this->_errorCode)<=2) ? 0 : $this->_errorCode;
                        }

                        if (empty($this->_connectionID)) $e = @db2_error(); 
                        else $e = @db2_error($this->_connectionID);
                        
                         // bug in 4.0.6, error number can be corrupted string (should be 6 digits)
                         // so we check and patch
                        if (strlen($e)<=2) return 0;
                        return $e;
                } else return ADOConnection::ErrorNo();
        }
        
        

        function BeginTrans()
        {       
                if (!$this->hasTransactions) return false;
                if ($this->transOff) return true; 
                $this->transCnt += 1;
                $this->_autocommit = false;
                return db2_autocommit($this->_connectionID,false);
        }
        
        function CommitTrans($ok=true) 
        { 
                if ($this->transOff) return true; 
                if (!$ok) return $this->RollbackTrans();
                if ($this->transCnt) $this->transCnt -= 1;
                $this->_autocommit = true;
                $ret = db2_commit($this->_connectionID);
                db2_autocommit($this->_connectionID,true);
                return $ret;
        }
        
        function RollbackTrans()
        {
                if ($this->transOff) return true; 
                if ($this->transCnt) $this->transCnt -= 1;
                $this->_autocommit = true;
                $ret = db2_rollback($this->_connectionID);
                db2_autocommit($this->_connectionID,true);
                return $ret;
        }
        
        function MetaPrimaryKeys($table)
        {
        global $ADODB_FETCH_MODE;
        
                if ($this->uCaseTables) $table = strtoupper($table);
                $schema = '';
                $this->_findschema($table,$schema);

                $savem = $ADODB_FETCH_MODE;
                $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
                $qid = @db2_primarykeys($this->_connectionID,'',$schema,$table);
                
                if (!$qid) {
                        $ADODB_FETCH_MODE = $savem;
                        return false;
                }
                $rs = new ADORecordSet_db2($qid);
                $ADODB_FETCH_MODE = $savem;
                
                if (!$rs) return false;
                
                $arr =& $rs->GetArray();
                $rs->Close();
                $arr2 = array();
                for ($i=0; $i < sizeof($arr); $i++) {
                        if ($arr[$i][3]) $arr2[] = $arr[$i][3];
                }
                return $arr2;
        }
        
        
        
        function &MetaTables($ttype=false)
        {
        global $ADODB_FETCH_MODE;
        
                $savem = $ADODB_FETCH_MODE;
                $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
                $qid = db2_tables($this->_connectionID);
                
                $rs = new ADORecordSet_db2($qid);
                
                $ADODB_FETCH_MODE = $savem;
                if (!$rs) {
                        $false = false;
                        return $false;
                }
                
                $arr =& $rs->GetArray();
                
                $rs->Close();
                $arr2 = array();
                
                if ($ttype) {
                        $isview = strncmp($ttype,'V',1) === 0;
                }
                for ($i=0; $i < sizeof($arr); $i++) {
                        if (!$arr[$i][2]) continue;
                        $type = $arr[$i][3];
                        if ($ttype) { 
                                if ($isview) {
                                        if (strncmp($type,'V',1) === 0) $arr2[] = $arr[$i][2];
                                } else if (strncmp($type,'SYS',3) !== 0) $arr2[] = $arr[$i][2];
                        } else if (strncmp($type,'SYS',3) !== 0) $arr2[] = $arr[$i][2];
                }
                return $arr2;
        }
        
/*
See http://msdn.microsoft.com/library/default.asp?url=/library/en-us/db2/htm/db2datetime_data_type_changes.asp
/ SQL data type codes /
#define SQL_UNKNOWN_TYPE        0
#define SQL_CHAR                        1
#define SQL_NUMERIC              2
#define SQL_DECIMAL              3
#define SQL_INTEGER              4
#define SQL_SMALLINT            5
#define SQL_FLOAT                  6
#define SQL_REAL                        7
#define SQL_DOUBLE                8
#if (DB2VER >= 0x0300)
#define SQL_DATETIME            9
#endif
#define SQL_VARCHAR             12


/ One-parameter shortcuts for date/time data types /
#if (DB2VER >= 0x0300)
#define SQL_TYPE_DATE     91
#define SQL_TYPE_TIME     92
#define SQL_TYPE_TIMESTAMP 93

#define SQL_UNICODE                             (-95)
#define SQL_UNICODE_VARCHAR                     (-96)
#define SQL_UNICODE_LONGVARCHAR                 (-97)
*/
        function DB2Types($t)
        {
                switch ((integer)$t) {
                case 1: 
                case 12:
                case 0:
                case -95:
                case -96:
                        return 'C';
                case -97:
                case -1: //text
                        return 'X';
                case -4: //image
                        return 'B';
                                
                case 9: 
                case 91:
                        return 'D';
                
                case 10:
                case 11:
                case 92:
                case 93:
                        return 'T';
                        
                case 4:
                case 5:
                case -6:
                        return 'I';
                        
                case -11: // uniqidentifier
                        return 'R';
                case -7: //bit
                        return 'L';
                
                default:
                        return 'N';
                }
        }
        
        function &MetaColumns($table)
        {
        global $ADODB_FETCH_MODE;
        
                $false = false;
                if ($this->uCaseTables) $table = strtoupper($table);
                $schema = '';
                $this->_findschema($table,$schema);
                
                $savem = $ADODB_FETCH_MODE;
                $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
        
                $colname = "%";
                $qid = db2_columns($this->_connectionID, "", $schema, $table, $colname);
                if (empty($qid)) return $false;
                
                $rs =& new ADORecordSet_db2($qid);
                $ADODB_FETCH_MODE = $savem;
                
                if (!$rs) return $false;
                $rs->_fetch();
                
                $retarr = array();
                
                /*
                $rs->fields indices
                0 TABLE_QUALIFIER
                1 TABLE_SCHEM
                2 TABLE_NAME
                3 COLUMN_NAME
                4 DATA_TYPE
                5 TYPE_NAME
                6 PRECISION
                7 LENGTH
                8 SCALE
                9 RADIX
                10 NULLABLE
                11 REMARKS
                */
                while (!$rs->EOF) {
                        if (strtoupper(trim($rs->fields[2])) == $table && (!$schema || strtoupper($rs->fields[1]) == $schema)) {
                                $fld = new ADOFieldObject();
                                $fld->name = $rs->fields[3];
                                $fld->type = $this->DB2Types($rs->fields[4]);
                                
                                // ref: http://msdn.microsoft.com/library/default.asp?url=/archive/en-us/dnaraccgen/html/msdn_odk.asp
                                // access uses precision to store length for char/varchar
                                if ($fld->type == 'C' or $fld->type == 'X') {
                                        if ($rs->fields[4] <= -95) // UNICODE
                                                $fld->max_length = $rs->fields[7]/2;
                                        else
                                                $fld->max_length = $rs->fields[7];
                                } else 
                                        $fld->max_length = $rs->fields[7];
                                $fld->not_null = !empty($rs->fields[10]);
                                $fld->scale = $rs->fields[8];
                                $retarr[strtoupper($fld->name)] = $fld; 
                        } else if (sizeof($retarr)>0)
                                break;
                        $rs->MoveNext();
                }
                $rs->Close(); //-- crashes 4.03pl1 -- why?
                
                if (empty($retarr)) $retarr = false;
                return $retarr;
        }
        
        function Prepare($sql)
        {
                if (! $this->_bindInputArray) return $sql; // no binding
                $stmt = db2_prepare($this->_connectionID,$sql);
                if (!$stmt) {
                        // we don't know whether db2 driver is parsing prepared stmts, so just return sql
                        return $sql;
                }
                return array($sql,$stmt,false);
        }

        /* returns queryID or false */
        function _query($sql,$inputarr=false) 
        {
        GLOBAL $php_errormsg;
                if (isset($php_errormsg)) $php_errormsg = '';
                $this->_error = '';
                
                if ($inputarr) {
                        if (is_array($sql)) {
                                $stmtid = $sql[1];
                        } else {
                                $stmtid = db2_prepare($this->_connectionID,$sql);
        
                                if ($stmtid == false) {
                                        $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
                                        return false;
                                }
                        }
                        
                        if (! db2_execute($stmtid,$inputarr)) {
                                if ($this->_haserrorfunctions) {
                                        $this->_errorMsg = db2_errormsg();
                                        $this->_errorCode = db2_error();
                                }
                                return false;
                        }
                
                } else if (is_array($sql)) {
                        $stmtid = $sql[1];
                        if (!db2_execute($stmtid)) {
                                if ($this->_haserrorfunctions) {
                                        $this->_errorMsg = db2_errormsg();
                                        $this->_errorCode = db2_error();
                                }
                                return false;
                        }
                } else
                        $stmtid = db2_exec($this->_connectionID,$sql);
                
                $this->_lastAffectedRows = 0;
                if ($stmtid) {
                        if (@db2_num_fields($stmtid) == 0) {
                                $this->_lastAffectedRows = db2_num_rows($stmtid);
                                $stmtid = true;
                        } else {
                                $this->_lastAffectedRows = 0;
                        }
                        
                        if ($this->_haserrorfunctions) {
                                $this->_errorMsg = '';
                                $this->_errorCode = 0;
                        } else
                                $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
                } else {
                        if ($this->_haserrorfunctions) {
                                $this->_errorMsg = db2_stmt_errormsg();
                                $this->_errorCode = db2_stmt_error();
                        } else
                                $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
                }
                return $stmtid;
        }

        /*
                Insert a null into the blob field of the table first.
                Then use UpdateBlob to store the blob.
                
                Usage:
                 
                $conn->Execute('INSERT INTO blobtable (id, blobcol) VALUES (1, null)');
                $conn->UpdateBlob('blobtable','blobcol',$blob,'id=1');
        */
        function UpdateBlob($table,$column,$val,$where,$blobtype='BLOB')
        {
                return $this->Execute("UPDATE $table SET $column=? WHERE $where",array($val)) != false;
        }
        
        // returns true or false
        function _close()
        {
                $ret = @db2_close($this->_connectionID);
                $this->_connectionID = false;
                return $ret;
        }

        function _affectedrows()
        {
                return $this->_lastAffectedRows;
        }
        
}
        
/*--------------------------------------------------------------------------------------
         Class Name: Recordset
--------------------------------------------------------------------------------------*/

class ADORecordSet_db2 extends ADORecordSet {   
        
        var $bind = false;
        var $databaseType = "db2";              
        var $dataProvider = "db2";
        var $useFetchArray;
        
        function ADORecordSet_db2($id,$mode=false)
        {
                if ($mode === false) {  
                        global $ADODB_FETCH_MODE;
                        $mode = $ADODB_FETCH_MODE;
                }
                $this->fetchMode = $mode;
                
                $this->_queryID = $id;
        }


        // returns the field object
        function &FetchField($fieldOffset = -1) 
        {
                
                $off=$fieldOffset+1; // offsets begin at 1
                
                $o= new ADOFieldObject();
                $o->name = @db2_field_name($this->_queryID,$off);
                $o->type = @db2_field_type($this->_queryID,$off);
                $o->max_length = db2_field_width($this->_queryID,$off);
                if (ADODB_ASSOC_CASE == 0) $o->name = strtolower($o->name);
                else if (ADODB_ASSOC_CASE == 1) $o->name = strtoupper($o->name);
                return $o;
        }
        
        /* Use associative array to get fields array */
        function Fields($colname)
        {
                if ($this->fetchMode & ADODB_FETCH_ASSOC) return $this->fields[$colname];
                if (!$this->bind) {
                        $this->bind = array();
                        for ($i=0; $i < $this->_numOfFields; $i++) {
                                $o = $this->FetchField($i);
                                $this->bind[strtoupper($o->name)] = $i;
                        }
                }

                 return $this->fields[$this->bind[strtoupper($colname)]];
        }
        
                
        function _initrs()
        {
        global $ADODB_COUNTRECS;
                $this->_numOfRows = ($ADODB_COUNTRECS) ? @db2_num_rows($this->_queryID) : -1;
                $this->_numOfFields = @db2_num_fields($this->_queryID);
                // some silly drivers such as db2 as/400 and intersystems cache return _numOfRows = 0
                if ($this->_numOfRows == 0) $this->_numOfRows = -1;
        }       
        
        function _seek($row)
        {
                return false;
        }
        
        // speed up SelectLimit() by switching to ADODB_FETCH_NUM as ADODB_FETCH_ASSOC is emulated
        function &GetArrayLimit($nrows,$offset=-1) 
        {
                if ($offset <= 0) {
                        $rs =& $this->GetArray($nrows);
                        return $rs;
                }
                $savem = $this->fetchMode;
                $this->fetchMode = ADODB_FETCH_NUM;
                $this->Move($offset);
                $this->fetchMode = $savem;
                
                if ($this->fetchMode & ADODB_FETCH_ASSOC) {
                        $this->fields =& $this->GetRowAssoc(ADODB_ASSOC_CASE);
                }
                
                $results = array();
                $cnt = 0;
                while (!$this->EOF && $nrows != $cnt) {
                        $results[$cnt++] = $this->fields;
                        $this->MoveNext();
                }
                
                return $results;
        }
        
        
        function MoveNext() 
        {
                if ($this->_numOfRows != 0 && !$this->EOF) {            
                        $this->_currentRow++;
                        
                        $this->fields = @db2_fetch_array($this->_queryID);
                        if ($this->fields) {
                                if ($this->fetchMode & ADODB_FETCH_ASSOC) {
                                        $this->fields =& $this->GetRowAssoc(ADODB_ASSOC_CASE);
                                }
                                return true;
                        }
                }
                $this->fields = false;
                $this->EOF = true;
                return false;
        }       
        
        function _fetch()
        {

                $this->fields = db2_fetch_array($this->_queryID);
                if ($this->fields) {
                        if ($this->fetchMode & ADODB_FETCH_ASSOC) {
                                $this->fields =& $this->GetRowAssoc(ADODB_ASSOC_CASE);
                        }
                        return true;
                }
                $this->fields = false;
                return false;
        }
        
        function _close() 
        {
                return @db2_free_result($this->_queryID);               
        }

}
?>
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