adodb-sqlite3.inc.php

gehe zur Dokumentation dieser Datei

<?php
/*
V5.19dev  ??-???-2014  (c) 2000-2014 John Lim (jlim#natsoft.com). All rights reserved.
  Released under both BSD license and Lesser GPL library license.
  Whenever there is any discrepancy between the two licenses,
  the BSD license will take precedence.

  Latest version is available at http://adodb.sourceforge.net

  SQLite info: http://www.hwaci.com/sw/sqlite/

  Install Instructions:
  ====================
  1. Place this in adodb/drivers
  2. Rename the file, remove the .txt prefix.
*/

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

// class ADODB_sqlite extends ADOConnection { **change
class ADODB_sqlite3 extends ADOConnection {
        //var $databaseType = "sqlite"; **change
        var $databaseType = "sqlite3";
        var $replaceQuote = "''"; // string to use to replace quotes
        var $concat_operator='||';
        var $_errorNo = 0;
        var $hasLimit = true;
        var $hasInsertID = true;                
        var $hasAffectedRows = true;    
        var $metaTablesSQL = "SELECT name FROM sqlite_master WHERE type='table' ORDER BY name";
        var $sysDate = "adodb_date('Y-m-d')";
        var $sysTimeStamp = "adodb_date('Y-m-d H:i:s')";
        var $fmtTimeStamp = "'Y-m-d H:i:s'";

        //function ADODB_sqlite3() **change
        function ADODB_sqlite3()
        {
        }

/*
  function __get($name)
  {
        switch($name) {
        case 'sysDate': return "'".date($this->fmtDate)."'";
        case 'sysTimeStamp' : return "'".date($this->sysTimeStamp)."'";
        }
  }*/

        function ServerInfo()
        {
                $arr['version'] = $this->_connectionID->version(); //**tochange
                $arr['description'] = 'SQLite 3'; //**tochange
                //$arr['encoding'] = sqlite_libencoding();//**tochange
                return $arr;
        }

        function BeginTrans()
        {
                 if ($this->transOff) return true;
                 $ret = $this->Execute("BEGIN TRANSACTION");
                 $this->transCnt += 1;
                 return true;
        }

        function CommitTrans($ok=true)
        {
                if ($this->transOff) return true;
                if (!$ok) return $this->RollbackTrans();
                $ret = $this->Execute("COMMIT");
                if ($this->transCnt>0)$this->transCnt -= 1;
                return !empty($ret);
        }

        function RollbackTrans()
        {
                if ($this->transOff) return true;
                $ret = $this->Execute("ROLLBACK");
                if ($this->transCnt>0)$this->transCnt -= 1;
                return !empty($ret);
        }

        // mark newnham
        function MetaColumns($table, $normalize=true)
        {
          global $ADODB_FETCH_MODE;
          $false = false;
          $save = $ADODB_FETCH_MODE;
          $ADODB_FETCH_MODE = ADODB_FETCH_ASSOC;
          if ($this->fetchMode !== false) $savem = $this->SetFetchMode(false);
          $rs = $this->Execute("PRAGMA table_info('$table')");
          if (isset($savem)) $this->SetFetchMode($savem);
          if (!$rs) {
            $ADODB_FETCH_MODE = $save;
            return $false;
          }
          $arr = array();
          while ($r = $rs->FetchRow()) {

            $type = explode('(',$r['type']);
            $size = '';
            if (sizeof($type)==2)
            $size = trim($type[1],')');
            $fn = strtoupper($r['name']);
            $fld = new ADOFieldObject;
            $fld->name = $r['name'];
            $fld->type = $type[0];
            $fld->max_length = $size;
            $fld->not_null = $r['notnull'];
            $fld->default_value = $r['dflt_value'];
            $fld->scale = 0;
                if (isset($r['pk']) && $r['pk']) $fld->primary_key=1;
            if ($save == ADODB_FETCH_NUM) $arr[] = $fld;
            else $arr[strtoupper($fld->name)] = $fld;
          }
          $rs->Close();
          $ADODB_FETCH_MODE = $save;
          return $arr;
        }

        function _init($parentDriver)
        {

                $parentDriver->hasTransactions = false;
                $parentDriver->hasInsertID = true;
        }

        function _insertid()
        {
                //return sqlite_last_insert_rowid($this->_connectionID)->; //**change
                return $this->_connectionID->lastInsertRowID();
        }

        function _affectedrows()
        {
                return $this->_connectionID->changes();
       //return sqlite3_changes($this->_connectionID); //**tochange
    }

        function ErrorMsg()
        {
                if ($this->_logsql) return $this->_errorMsg;

                return ($this->_errorNo) ? $this->ErrorNo() : ''; //**tochange?
        }

        function ErrorNo()
        {
                return $this->_connectionID->lastErrorCode(); //**tochange??
        }

        function SQLDate($fmt, $col=false)
        {
                $fmt = $this->qstr($fmt);
                return ($col) ? "adodb_date2($fmt,$col)" : "adodb_date($fmt)";
        }


        function _createFunctions()
        {
                //@sqlite3_create_function($this->_connectionID, 'adodb_date', 'adodb_date', 1); *change
                $this->_connectionID->createFunction('adodb_date', 'adodb_date', 1);

                //@sqlite3_create_function($this->_connectionID, 'adodb_date2', 'adodb_date2', 2);**change
                $this->_connectionID->createFunction('adodb_date2', 'adodb_date2', 2);
        }


        // returns true or false
        function _connect($argHostname, $argUsername, $argPassword, $argDatabasename) //**tochange: all the function need to be changed, just hacks for the moment
        {
                if (empty($argHostname) && $argDatabasename) $argHostname = $argDatabasename;
                $this->_connectionID = new SQLite3($argDatabasename);
                $this->_createFunctions();

                return true; // hack
                /*
                if (!function_exists('sqlite_open')) return null;
                if (empty($argHostname) && $argDatabasename) $argHostname = $argDatabasename;

                $this->_connectionID = sqlite_open($argHostname);
                if ($this->_connectionID === false) return false;
                $this->_createFunctions();
                return true;
                */
        }

        // returns true or false
        function _pconnect($argHostname, $argUsername, $argPassword, $argDatabasename) //**tochange
        {
                if (!function_exists('sqlite_open')) return null;
                if (empty($argHostname) && $argDatabasename) $argHostname = $argDatabasename;

                $this->_connectionID = sqlite_popen($argHostname);
                if ($this->_connectionID === false) return false;
                $this->_createFunctions();
                return true;
        }

        // returns query ID if successful, otherwise false
        function _query($sql,$inputarr=false)
        {
                //$rez = sqlite_query($sql,$this->_connectionID);//**change
                $rez = $this->_connectionID->query($sql);
                if (!$rez) {
                        //$this->_errorNo = sqlite3_last_error($this->_connectionID);**change
                        $this->_connectionID->lastErrorCode();
                }

                return $rez;
        }

        function SelectLimit($sql,$nrows=-1,$offset=-1,$inputarr=false,$secs2cache=0)
        {
                $offsetStr = ($offset >= 0) ? " OFFSET $offset" : '';
                $limitStr  = ($nrows >= 0)  ? " LIMIT $nrows" : ($offset >= 0 ? ' LIMIT 999999999' : '');
                if ($secs2cache)
                        $rs = $this->CacheExecute($secs2cache,$sql."$limitStr$offsetStr",$inputarr);
                else
                        $rs = $this->Execute($sql."$limitStr$offsetStr",$inputarr);

                return $rs;
        }

        /*
                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.
        */
        var $_genSeqSQL = "create table %s (id integer)";

        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!
                $MAXLOOPS = 100;
                //$this->debug=1;
                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 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));
        }

        // returns true or false
        function _close()
        {
                //return @sqlite3_close($this->_connectionID);**change
                return $this->_connectionID->close();
        }

        function MetaIndexes($table, $primary = FALSE, $owner=false, $owner = false)
        {
                $false = false;
                // save old fetch mode
        global $ADODB_FETCH_MODE;
        $save = $ADODB_FETCH_MODE;
        $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
        if ($this->fetchMode !== FALSE) {
               $savem = $this->SetFetchMode(FALSE);
        }
                $SQL=sprintf("SELECT name,sql FROM sqlite_master WHERE type='index' AND tbl_name='%s'", strtolower($table));
        $rs = $this->Execute($SQL);
        if (!is_object($rs)) {
                        if (isset($savem))
                                $this->SetFetchMode($savem);
                        $ADODB_FETCH_MODE = $save;
            return $false;
        }

                $indexes = array ();
                while ($row = $rs->FetchRow()) {
                        if ($primary && preg_match("/primary/i",$row[1]) == 0) continue;
            if (!isset($indexes[$row[0]])) {

                        $indexes[$row[0]] = array(
                                   'unique' => preg_match("/unique/i",$row[1]),
                                   'columns' => array());
                        }
                        $cols = explode("(",$row[1]);
                        $cols = explode(")",$cols[1]);
                        array_pop($cols);
                        $indexes[$row[0]]['columns'] = $cols;
                }
                if (isset($savem)) {
            $this->SetFetchMode($savem);
                        $ADODB_FETCH_MODE = $save;
                }
        return $indexes;
        }

}

/*--------------------------------------------------------------------------------------
                 Class Name: Recordset
--------------------------------------------------------------------------------------*/

//class ADORecordset_sqlite extends ADORecordSet {**change
class ADORecordset_sqlite3 extends ADORecordSet {

        //var $databaseType = "sqlite";**change
        var $databaseType = "sqlite3";
        var $bind = false;

        //function ADORecordset_sqlite($queryID,$mode=false)**change
        function ADORecordset_sqlite3($queryID,$mode=false)
        {

                if ($mode === false) {
                        global $ADODB_FETCH_MODE;
                        $mode = $ADODB_FETCH_MODE;
                }
                switch($mode) {
                //case ADODB_FETCH_NUM: $this->fetchMode = SQLITE_NUM; break;**change
                case ADODB_FETCH_NUM: $this->fetchMode = SQLITE3_NUM; break;
                //case ADODB_FETCH_ASSOC: $this->fetchMode = SQLITE_ASSOC; break;**change
                case ADODB_FETCH_ASSOC: $this->fetchMode = SQLITE3_ASSOC; break;
                //default: $this->fetchMode = SQLITE_BOTH; break;**change
                default: $this->fetchMode = SQLITE3_BOTH; break;
                }
                $this->adodbFetchMode = $mode;

                $this->_queryID = $queryID;

                $this->_inited = true;
                $this->fields = array();
                if ($queryID) {
                        $this->_currentRow = 0;
                        $this->EOF = !$this->_fetch();
                        @$this->_initrs();
                } else {
                        $this->_numOfRows = 0;
                        $this->_numOfFields = 0;
                        $this->EOF = true;
                }

                return $this->_queryID;
        }


        function FetchField($fieldOffset = -1)
        {
                $fld = new ADOFieldObject;
                //$fld->name = sqlite3_field_name($this->_queryID, $fieldOffset);**change
                $fld->name->columnName($this->_queryID, $fieldOffset);
                $fld->type = 'VARCHAR';
                $fld->max_length = -1;
                return $fld;
        }

   function _initrs()
   {
                //$this->_numOfRows = @sqlite_num_rows($this->_queryID); **tochange but sqlite3 doesn't implement this!
                $this->_numOfRows = 1;
                //$this->_numOfFields = @sqlite3_num_fields($this->_queryID);**change
                $this->_numOfFields = $this->_queryID->numColumns();

   }

        function Fields($colname)
        {
                //if ($this->fetchMode != SQLITE_NUM) return $this->fields[$colname];**change
                if ($this->fetchMode != SQLITE3_NUM) 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 _seek($row)
   {
                return sqlite3_seek($this->_queryID, $row);//**tochange but sqlite3 seems not to implement seek!
   }

        function _fetch($ignore_fields=false)
        {
                //$this->fields = @sqlite3_fetch_array($this->_queryID,$this->fetchMode);**change
                $this->fields = $this->_queryID->fetchArray($this->fetchMode);
                return !empty($this->fields);
        }

        function _close()
        {
        }

}
?>