PHP odbc_longreadlen函数代码示例

 function query($Query_String)
 {
     /* No empty queries, please, since PHP4 chokes on them. */
     if ($Query_String == "") {
         /* The empty query string is passed on from the constructor,
          * when calling the class without a query, e.g. in situations
          * like these: '$db = new DB_Sql_Subclass;'
          */
         return 0;
     }
     $this->connect();
     #   printf("<br>Debug: query = %s<br>\n", $Query_String);
     #   rei@netone.com.br suggested that we use this instead of the odbc_do().
     #   He is on NT, connecting to a Unix MySQL server with ODBC. -- KK
     #    $this->Query_ID = odbc_prepare($this->Link_ID,$Query_String);
     #    $this->Query_Ok = odbc_execute($this->Query_ID);
     $this->Query_ID = odbc_do($this->Link_ID, $Query_String);
     $this->Row = 0;
     odbc_binmode($this->Query_ID, 1);
     odbc_longreadlen($this->Query_ID, 4096);
     if (!$this->Query_ID) {
         $this->Errno = 1;
         $this->Error = "General Error (The ODBC interface cannot return detailed error messages).";
         $this->halt("Invalid SQL: " . $Query_String);
     }
     return $this->Query_ID;
 }

 public function execAsJson($query, $logComponent)
 {
     $query = 'sparql define output:format "RDF/XML" ' . $query;
     /*
     		$query= 'sparql define output:format "TTL" ' .$query;
     */
     /*
     		echo $query;
     		die;
     */
     $odbc_result = $this->exec($query, $logComponent);
     odbc_longreadlen($odbc_result, ODBC_MAX_LONGREAD_LENGTH);
     odbc_fetch_row($odbc_result);
     $data = false;
     do {
         $temp = odbc_result($odbc_result, 1);
         if ($temp != null) {
             $data .= $temp;
         }
     } while ($temp != null);
     //=$data;
     $conv = new XmlConverter();
     $arr = $conv->toArray($data);
     //print_r($arr);
     //die;
     //Logger::warn('check if faster with default graph, ');
     return $arr;
 }

 function query($Query_String)
 {
     // remove the 'LIMIT' clause from the query
     $pos = strpos($Query_String, " LIMIT ");
     if ($pos) {
         $Query_String = substr($Query_String, 0, $pos);
     }
     unset($pos);
     $this->connect();
     # printf("<br />Debug: query = %s<br />\n", $Query_String);
     # rei@netone.com.br suggested that we use this instead of the odbc_exec().
     # He is on NT, connecting to a Unix MySQL server with ODBC. -- KK
     # $this->Query_ID = odbc_prepare($this->Link_ID,$Query_String);
     # $this->Query_Ok = odbc_execute($this->Query_ID);
     $this->Query_ID = odbc_exec($this->Link_ID, $Query_String);
     $this->Row = 0;
     odbc_binmode($this->Query_ID, 1);
     odbc_longreadlen($this->Query_ID, 4096);
     if (!$this->Query_ID) {
         $this->Errno = 1;
         $this->Error = "General Error (The ODBC interface cannot return detailed error messages).";
         $this->halt("Invalid SQL: " . $Query_String);
     }
     return $this->Query_ID;
 }

 /**	
  * Send an SQL query
  * @param String sql
  * @return Mixed
  */
 public function query($sql)
 {
     $this->debugInfo($sql);
     $rs = odbc_exec($this->conn, $sql);
     if (!$rs) {
         trigger_error(odbc_error(), E_USER_ERROR);
         return FALSE;
     }
     odbc_binmode($rs, ODBC_BINMODE_RETURN);
     odbc_longreadlen($rs, 1024 * 1024);
     return new QueryResult($this, $rs);
 }

function db_query($qstring,$conn) 
{
	global $strLastSQL,$dDebug;
	if ($dDebug===true)
		echo $qstring."<br>";
	$strLastSQL=$qstring;
	if(!($rs=odbc_exec($conn,$qstring)))
	  trigger_error(odbc_error(), E_USER_ERROR);
	odbc_binmode($rs,ODBC_BINMODE_RETURN);
	odbc_longreadlen($rs,1024*1024);
	return $rs;
	
}

 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 {
             $stmtid = odbc_prepare($this->_connectionID, $sql);
             if ($stmtid == false) {
                 $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
                 return false;
             }
         }
         if (!odbc_execute($stmtid, $inputarr)) {
             //@odbc_free_result($stmtid);
             if ($this->_haserrorfunctions) {
                 $this->_errorMsg = odbc_errormsg();
                 $this->_errorCode = odbc_error();
             }
             return false;
         }
     } else {
         if (is_array($sql)) {
             $stmtid = $sql[1];
             if (!odbc_execute($stmtid)) {
                 //@odbc_free_result($stmtid);
                 if ($this->_haserrorfunctions) {
                     $this->_errorMsg = odbc_errormsg();
                     $this->_errorCode = odbc_error();
                 }
                 return false;
             }
         } else {
             $stmtid = odbc_exec($this->_connectionID, $sql);
         }
     }
     $this->_lastAffectedRows = 0;
     if ($stmtid) {
         if (@odbc_num_fields($stmtid) == 0) {
             $this->_lastAffectedRows = odbc_num_rows($stmtid);
             $stmtid = true;
         } else {
             $this->_lastAffectedRows = 0;
             odbc_binmode($stmtid, $this->binmode);
             odbc_longreadlen($stmtid, $this->maxblobsize);
         }
         if ($this->_haserrorfunctions) {
             $this->_errorMsg = '';
             $this->_errorCode = 0;
         } else {
             $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
         }
     } else {
         if ($this->_haserrorfunctions) {
             $this->_errorMsg = odbc_errormsg();
             $this->_errorCode = odbc_error();
         } else {
             $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
         }
     }
     return $stmtid;
 }

 /**
  * Get file contents
  *
  * @param  string  $path  file path
  * @return string|false
  * @author Dmitry (dio) Levashov
  **/
 protected function _getContents($path)
 {
     $sql = "SET TEXTSIZE 2147483647 ";
     // increase mssql or odbc data size limit
     $sql .= sprintf('SELECT convert(varbinary(max),content) as content FROM %s WHERE id=%d', $this->tbf, $path);
     $res = $this->query($sql);
     odbc_binmode($res, ODBC_BINMODE_RETURN);
     //long binary handling
     odbc_longreadlen($res, 500000000);
     //increase mssql or odbc data size 500 Megabytes
     $r = odbc_fetch_array($res);
     return $res && $r ? base64_decode($r['content']) : false;
 }

 /**
  * Reads in any unread LOB data. For long char fields, we may already
  * have up to odbc_longreadlen() bytes in the buffer. These are passed
  * in via the $curdata parm. For long binary fields, no data is read
  * initially since odbc_binmode() is set to ODBC_BINMODE_PASSTHRU.
  * This method adjusts the binmode and longreadlen to finish reading
  * these datatypes into the buffer. Returns a string with the complete
  * contents.
  *
  * @param int|string $column Column index or name to read data from.
  * @param int $binmode ODBC_BINMODE_RETURN for binary data, ODBC_BINMODE_CONVERT for char data.
  * @param string $curdata Existing LOB data already in buffer.
  * @return string
  */
 protected function readLobData($column, $binmode, $curdata = null)
 {
     // Retrieve field num
     $fldNum = is_int($column) ? $column : getFieldNum($column);
     $data = $curdata;
     $newdata = null;
     // Adjust binmode and longreadlen
     odbc_binmode($this->result->getHandle(), $binmode);
     odbc_longreadlen($this->result->getHandle(), 4096);
     while (1) {
         $newdata = odbc_result($this->result->getHandle(), $fldNum);
         if ($newdata === false) {
             break;
         } else {
             $data .= $newdata;
         }
     }
     // Restore the default binmode and longreadlen
     odbc_binmode($this->result->getHandle(), ODBC_BINMODE_PASSTHRU);
     odbc_longreadlen($this->result->getHandle(), ini_get('odbc.defaultlrl'));
     // The ODBC driver I use seems to return a string with an escaped
     // null char at the end for clob data.
     $data = rtrim($data, "");
     return $data;
 }

    private function _retrieveHashValues()
    {
        $sql = 'Select ' . FIELD_JSON_BLOB . ' 
From ' . TABLENAME . ' 
Where ' . FIELD_OAIID . ' = ' . $this->oaiId;
        $odbc_result = $this->odbc->exec($sql, 'Hash::_retrieveHashValues');
        $num = odbc_num_rows($odbc_result);
        if ($num <= 0) {
            $this->log(INFO, $this->subject . ' : no hash found');
            return false;
        }
        odbc_longreadlen($odbc_result, ODBC_MAX_LONGREAD_LENGTH);
        odbc_fetch_row($odbc_result);
        $data = false;
        do {
            $temp = odbc_result($odbc_result, 1);
            if ($temp != null) {
                $data .= $temp;
            }
        } while ($temp != null);
        $this->hashesFromStore = json_decode($data, true);
        if (!is_array($this->hashesFromStore)) {
            $this->log(WARN, 'conversion to JSON failed, not using hash this time');
            $this->log(WARN, $data);
            return false;
        }
        $this->log(INFO, $this->subject . ' retrieved hashes from ' . count(array_keys($this->hashesFromStore)) . ' extractors ');
        return true;
    }

 /**
  * Executes an SQL query
  * 
  * @param  fResult $result  The result object for the query
  * @return void
  */
 private function executeQuery($result)
 {
     // We don't want errors and an exception
     $old_level = error_reporting(error_reporting() & ~E_WARNING);
     if ($this->extension == 'mssql') {
         $result->setResult(mssql_query($result->getSQL(), $this->connection));
     } elseif ($this->extension == 'mysql') {
         $result->setResult(mysql_query($result->getSQL(), $this->connection));
     } elseif ($this->extension == 'mysqli') {
         $result->setResult(mysqli_query($this->connection, $result->getSQL()));
     } elseif ($this->extension == 'oci8') {
         $oci_statement = oci_parse($this->connection, $result->getSQL());
         if (oci_execute($oci_statement, $this->inside_transaction ? OCI_DEFAULT : OCI_COMMIT_ON_SUCCESS)) {
             oci_fetch_all($oci_statement, $rows, 0, -1, OCI_FETCHSTATEMENT_BY_ROW + OCI_ASSOC);
             $result->setResult($rows);
             unset($rows);
         } else {
             $result->setResult(FALSE);
         }
     } elseif ($this->extension == 'odbc') {
         $resource = odbc_exec($this->connection, $result->getSQL());
         if (is_resource($resource)) {
             $rows = array();
             // Allow up to 1MB of binary data
             odbc_longreadlen($resource, 1048576);
             odbc_binmode($resource, ODBC_BINMODE_CONVERT);
             while ($row = odbc_fetch_array($resource)) {
                 $rows[] = $row;
             }
             $result->setResult($rows);
             unset($rows);
         } else {
             $result->setResult($resource);
         }
     } elseif ($this->extension == 'pgsql') {
         $result->setResult(pg_query($this->connection, $result->getSQL()));
     } elseif ($this->extension == 'sqlite') {
         $result->setResult(sqlite_query($this->connection, $result->getSQL(), SQLITE_ASSOC, $sqlite_error_message));
     } elseif ($this->extension == 'sqlsrv') {
         $resource = sqlsrv_query($this->connection, $result->getSQL());
         if (is_resource($resource)) {
             $rows = array();
             while ($row = sqlsrv_fetch_array($resource, SQLSRV_FETCH_ASSOC)) {
                 $rows[] = $row;
             }
             $result->setResult($rows);
             unset($rows);
         } else {
             $result->setResult($resource);
         }
     } elseif ($this->extension == 'pdo') {
         if (preg_match('#^\\s*CREATE(\\s+OR\\s+REPLACE)?\\s+TRIGGER#i', $result->getSQL())) {
             $this->connection->exec($result->getSQL());
             $pdo_statement = FALSE;
             $returned_rows = array();
         } else {
             $pdo_statement = $this->connection->query($result->getSQL());
             $returned_rows = is_object($pdo_statement) ? $pdo_statement->fetchAll(PDO::FETCH_ASSOC) : $pdo_statement;
             // The pdo_pgsql driver likes to return empty rows equal to the number of affected rows for insert and deletes
             if ($this->type == 'postgresql' && $returned_rows && $returned_rows[0] == array()) {
                 $returned_rows = array();
             }
         }
         $result->setResult($returned_rows);
     }
     error_reporting($old_level);
     if ($this->extension == 'sqlite') {
         $this->checkForError($result, $sqlite_error_message);
     } elseif ($this->extension == 'oci8') {
         $this->checkForError($result, $oci_statement);
     } else {
         $this->checkForError($result);
     }
     if ($this->extension == 'pdo') {
         $this->setAffectedRows($result, $pdo_statement);
         if ($pdo_statement) {
             $pdo_statement->closeCursor();
         }
         unset($pdo_statement);
     } elseif ($this->extension == 'oci8') {
         $this->setAffectedRows($result, $oci_statement);
         oci_free_statement($oci_statement);
     } elseif ($this->extension == 'odbc') {
         $this->setAffectedRows($result, $resource);
         odbc_free_result($resource);
     } elseif ($this->extension == 'sqlsrv') {
         $this->setAffectedRows($result, $resource);
         sqlsrv_free_stmt($resource);
     } else {
         $this->setAffectedRows($result);
     }
     $this->setReturnedRows($result);
     $this->handleAutoIncrementedValue($result);
 }

 function _query($sql, $inputarr = false)
 {
     global $php_errormsg;
     $php_errormsg = '';
     $this->_error = '';
     if ($inputarr) {
         if (is_resource($sql)) {
             $stmtid = $sql;
         } else {
             $stmtid = odbc_prepare($this->_connectionID, $sql);
         }
         if ($stmtid == false) {
             $this->_errorMsg = $php_errormsg;
             return false;
         }
         //print_r($inputarr);
         if (!odbc_execute($stmtid, $inputarr)) {
             @odbc_free_result($stmtid);
             return false;
         }
     } else {
         $stmtid = odbc_exec($this->_connectionID, $sql);
     }
     if ($stmtid) {
         odbc_binmode($stmtid, $this->binmode);
         odbc_longreadlen($stmtid, $this->maxblobsize);
     }
     $this->_errorMsg = $php_errormsg;
     return $stmtid;
 }

 /**
  * Executes an unbuffered SQL query
  * 
  * @param  string|fStatement $statement  The statement to perform
  * @param  fUnbufferedResult $result     The result object for the query
  * @param  array             $params     The parameters for prepared statements
  * @return void
  */
 private function performUnbufferedQuery($statement, $result, $params)
 {
     $this->setErrorHandler();
     $extra = NULL;
     if (is_object($statement)) {
         $statement->executeUnbufferedQuery($result, $params, $extra, $statement != $this->statement);
     } elseif ($this->extension == 'ibm_db2') {
         $result->setResult(db2_exec($this->connection, $statement, array('cursor' => DB2_FORWARD_ONLY)));
     } elseif ($this->extension == 'mssql') {
         $result->setResult(mssql_query($result->getSQL(), $this->connection, 20));
     } elseif ($this->extension == 'mysql') {
         $result->setResult(mysql_unbuffered_query($result->getSQL(), $this->connection));
     } elseif ($this->extension == 'mysqli') {
         $result->setResult(mysqli_query($this->connection, $result->getSQL(), MYSQLI_USE_RESULT));
     } elseif ($this->extension == 'oci8') {
         $extra = oci_parse($this->connection, $result->getSQL());
         if (oci_execute($extra, $this->inside_transaction ? OCI_DEFAULT : OCI_COMMIT_ON_SUCCESS)) {
             $result->setResult($extra);
         } else {
             $result->setResult(FALSE);
         }
     } elseif ($this->extension == 'odbc') {
         $extra = odbc_exec($this->connection, $result->getSQL());
         if ($extra) {
             odbc_longreadlen($extra, 1048576);
             odbc_binmode($extra, ODBC_BINMODE_CONVERT);
         }
         $result->setResult($extra);
     } elseif ($this->extension == 'pgsql') {
         $result->setResult(pg_query($this->connection, $result->getSQL()));
     } elseif ($this->extension == 'sqlite') {
         $result->setResult(sqlite_unbuffered_query($this->connection, $result->getSQL(), SQLITE_ASSOC, $extra));
     } elseif ($this->extension == 'sqlsrv') {
         $result->setResult(sqlsrv_query($this->connection, $result->getSQL()));
     } elseif ($this->extension == 'pdo') {
         $result->setResult($this->connection->query($result->getSQL()));
     }
     $this->statement = $statement;
     $this->restoreErrorHandler();
     $this->checkForError($result, $extra);
 }

 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 {
             $stmtid = odbc_prepare($this->_connectionID, $sql);
             if ($stmtid == false) {
                 $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
                 return false;
             }
         }
         if (!odbc_execute($stmtid, $inputarr)) {
             //@odbc_free_result($stmtid);
             if ($this->_haserrorfunctions) {
                 $this->_errorMsg = odbc_errormsg();
                 $this->_errorCode = odbc_error();
             }
             if ($this->_errorCode == '00000') {
                 // MS SQL Server sometimes returns this in combination with the FreeTDS
                 $this->_errorMsg = '';
                 // driver and UnixODBC under Linux. This fixes the bogus "error"
                 $this->_errorCode = 0;
                 // <karsten@typo3.org>
                 return true;
             }
             return false;
         }
     } else {
         if (is_array($sql)) {
             $stmtid = $sql[1];
             if (!odbc_execute($stmtid)) {
                 //@odbc_free_result($stmtid);
                 if ($this->_haserrorfunctions) {
                     $this->_errorMsg = odbc_errormsg();
                     $this->_errorCode = odbc_error();
                 }
                 if ($this->_errorCode == '00000') {
                     // MS SQL Server sometimes returns this in combination with the FreeTDS
                     $this->_errorMsg = '';
                     // driver and UnixODBC under Linux. This fixes the bogus "error"
                     $this->_errorCode = 0;
                     // <karsten@typo3.org>
                     return true;
                 }
                 return false;
             }
         } else {
             $stmtid = odbc_exec($this->_connectionID, $sql);
         }
     }
     $this->_lastAffectedRows = 0;
     if ($stmtid) {
         if (@odbc_num_fields($stmtid) == 0) {
             $this->_lastAffectedRows = odbc_num_rows($stmtid);
             $stmtid = true;
         } else {
             $this->_lastAffectedRows = 0;
             odbc_binmode($stmtid, $this->binmode);
             odbc_longreadlen($stmtid, $this->maxblobsize);
         }
         if ($this->_haserrorfunctions) {
             $this->_errorMsg = '';
             $this->_errorCode = 0;
         } else {
             $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
         }
     } else {
         if ($this->_haserrorfunctions) {
             $this->_errorMsg = odbc_errormsg();
             $this->_errorCode = odbc_error();
         } else {
             $this->_errorMsg = isset($php_errormsg) ? $php_errormsg : '';
         }
     }
     return $stmtid;
 }

 /**
  * @see Connection::connect()
  */
 public function connect($dsninfo, $flags = 0)
 {
     if (!function_exists('odbc_connect')) {
         throw new SQLException('odbc extension not loaded');
     }
     $adapterclass = isset($dsninfo['adapter']) ? $dsninfo['adapter'] : null;
     if (!$adapterclass) {
         $adapterclass = 'ODBCAdapter';
     } else {
         $adapterclass .= 'Adapter';
     }
     Creole::import('creole.drivers.odbc.adapters.' . $adapterclass);
     $this->adapter = new $adapterclass();
     $this->dsn = $dsninfo;
     $this->flags = $flags;
     if (!($this->flags & Creole::COMPAT_ASSOC_LOWER) && !$this->adapter->preservesColumnCase()) {
         trigger_error('Connection created without Creole::COMPAT_ASSOC_LOWER, ' . 'but driver does not support case preservation.', E_USER_WARNING);
         $this->flags != Creole::COMPAT_ASSOC_LOWER;
     }
     $persistent = ($flags & Creole::PERSISTENT) === Creole::PERSISTENT;
     if ($dsninfo['database']) {
         $odbcdsn = $dsninfo['database'];
     } elseif ($dsninfo['hostspec']) {
         $odbcdsn = $dsninfo['hostspec'];
     } else {
         $odbcdsn = 'localhost';
     }
     $user = @$dsninfo['username'];
     $pw = @$dsninfo['password'];
     $connect_function = $persistent ? 'odbc_pconnect' : 'odbc_connect';
     $conn = @$connect_function($odbcdsn, $user, $pw, SQL_CUR_USE_IF_NEEDED);
     if (!is_resource($conn)) {
         throw new SQLException('connect failed', $this->nativeError(), $odbcdsn);
     }
     $this->dblink = $conn;
     /**
      * This prevents blob fields from being fetched when a row is loaded
      * from a recordset. Clob fields however are loaded with up to
      * 'odbc.defaultlrl' data. This should be the default anyway, but we'll
      * set it here just to keep things consistent.
      */
     @odbc_binmode(0, ODBC_BINMODE_PASSTHRU);
     @odbc_longreadlen(0, ini_get('odbc.defaultlrl'));
 }

<?php

if ($conn = odbc_connect($dsn, $dbuser, $dbpwd)) {
    if ($res = odbc_do($conn, "select gif from php_test where id='{$id}'")) {
        odbc_binmode($res, 0);
        odbc_longreadlen($res, 0);
        if (odbc_fetch_row($res)) {
            header("content-type: image/gif");
            odbc_result($res, 1);
            exit;
        } else {
            echo "Error in odbc_fetch_row";
        }
    } else {
        echo "Error in odbc_do";
    }
} else {
    echo "Error in odbc_connect";
}