adodb-mssql.inc.php

很棒的在线教学系统

		global $ADODB_FETCH_MODE;
		$save = $ADODB_FETCH_MODE;
        $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
        if ($this->fetchMode !== FALSE) {
        	$savem = $this->SetFetchMode(FALSE);
        }
        
        $rs = $this->Execute($sql);
        if (isset($savem)) {
        	$this->SetFetchMode($savem);
        }
        $ADODB_FETCH_MODE = $save;

        if (!is_object($rs)) {
        	return FALSE;
        }

		$indexes = array();
		while ($row = $rs->FetchRow()) {
			if (!$primary && $row[5]) continue;
			
            $indexes[$row[0]]['unique'] = $row[6];
            $indexes[$row[0]]['columns'][] = $row[1];
    	}
        return $indexes;
	}
	
	function MetaForeignKeys($table, $owner=false, $upper=false)
	{
	global $ADODB_FETCH_MODE;
	
		$save = $ADODB_FETCH_MODE;
		$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
		$table = $this->qstr(strtoupper($table));
		
		$sql = 
"select object_name(constid) as constraint_name,
	col_name(fkeyid, fkey) as column_name,
	object_name(rkeyid) as referenced_table_name,
   	col_name(rkeyid, rkey) as referenced_column_name
from sysforeignkeys
where upper(object_name(fkeyid)) = $table
order by constraint_name, referenced_table_name, keyno";
		
		$constraints =& $this->GetArray($sql);
		
		$ADODB_FETCH_MODE = $save;
		
		$arr = false;
		foreach($constraints as $constr) {
			//print_r($constr);
			$arr[$constr[0]][$constr[2]][] = $constr[1].'='.$constr[3]; 
		}
		if (!$arr) return false;
		
		$arr2 = false;
		
		foreach($arr as $k => $v) {
			foreach($v as $a => $b) {
				if ($upper) $a = strtoupper($a);
				$arr2[$a] = $b;
			}
		}
		return $arr2;
	}

	//From: Fernando Moreira <[e-mail]>
	function MetaDatabases() 
	{ 
		if(@mssql_select_db("master")) { 
				 $qry=$this->metaDatabasesSQL; 
				 if($rs=@mssql_query($qry,$this->_connectionID)){ 
						 $tmpAr=$ar=array(); 
						 while($tmpAr=@mssql_fetch_row($rs)) 
								 $ar[]=$tmpAr[0]; 
						@mssql_select_db($this->database); 
						 if(sizeof($ar)) 
								 return($ar); 
						 else 
								 return(false); 
				 } else { 
						 @mssql_select_db($this->database); 
						 return(false); 
				 } 
		 } 
		 return(false); 
	} 

	// "Stein-Aksel Basma" <[e-mail]>
	// tested with MSSQL 2000
	function &MetaPrimaryKeys($table)
	{
	global $ADODB_FETCH_MODE;
	
		$schema = '';
		$this->_findschema($table,$schema);
		if (!$schema) $schema = $this->database;
		if ($schema) $schema = "and k.table_catalog like '$schema%'"; 

		$sql = "select distinct k.column_name,ordinal_position from information_schema.key_column_usage k,
		information_schema.table_constraints tc 
		where tc.constraint_name = k.constraint_name and tc.constraint_type =
		'PRIMARY KEY' and k.table_name = '$table' $schema order by ordinal_position ";
		
		$savem = $ADODB_FETCH_MODE;
		$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
		$a = $this->GetCol($sql);
		$ADODB_FETCH_MODE = $savem;
		
		if ($a && sizeof($a)>0) return $a;
		$false = false;
		return $false;	  
	}

	
	function &MetaTables($ttype=false,$showSchema=false,$mask=false) 
	{
		if ($mask) {
			$save = $this->metaTablesSQL;
			$mask = $this->qstr(($mask));
			$this->metaTablesSQL .= " AND name like $mask";
		}
		$ret =& ADOConnection::MetaTables($ttype,$showSchema);
		
		if ($mask) {
			$this->metaTablesSQL = $save;
		}
		return $ret;
	}
 
	function SelectDB($dbName) 
	{
		$this->database = $dbName;
		$this->databaseName = $dbName; # obsolete, retained for compat with older adodb versions
		if ($this->_connectionID) {
			return @mssql_select_db($dbName);		
		}
		else return false;	
	}
	
	function ErrorMsg() 
	{
		if (empty($this->_errorMsg)){
			$this->_errorMsg = mssql_get_last_message();
		}
		return $this->_errorMsg;
	}
	
	function ErrorNo() 
	{
		if ($this->_logsql && $this->_errorCode !== false) return $this->_errorCode;
		if (empty($this->_errorMsg)) {
			$this->_errorMsg = mssql_get_last_message();
		}
		$id = @mssql_query("select @@ERROR",$this->_connectionID);
		if (!$id) return false;
		$arr = mssql_fetch_array($id);
		@mssql_free_result($id);
		if (is_array($arr)) return $arr[0];
	   else return -1;
	}
	
	// returns true or false
	function _connect($argHostname, $argUsername, $argPassword, $argDatabasename)
	{
		if (!function_exists('mssql_pconnect')) return null;
		$this->_connectionID = mssql_connect($argHostname,$argUsername,$argPassword);
		if ($this->_connectionID === false) return false;
		if ($argDatabasename) return $this->SelectDB($argDatabasename);
		return true;	
	}
	
	
	// returns true or false
	function _pconnect($argHostname, $argUsername, $argPassword, $argDatabasename)
	{
		if (!function_exists('mssql_pconnect')) return null;
		$this->_connectionID = mssql_pconnect($argHostname,$argUsername,$argPassword);
		if ($this->_connectionID === false) return false;
		
		// persistent connections can forget to rollback on crash, so we do it here.
		if ($this->autoRollback) {
			$cnt = $this->GetOne('select @@TRANCOUNT');
			while (--$cnt >= 0) $this->Execute('ROLLBACK TRAN'); 
		}
		if ($argDatabasename) return $this->SelectDB($argDatabasename);
		return true;	
	}
	
	function Prepare($sql)
	{
		$sqlarr = explode('?',$sql);
		if (sizeof($sqlarr) <= 1) return $sql;
		$sql2 = $sqlarr[0];
		for ($i = 1, $max = sizeof($sqlarr); $i < $max; $i++) {
			$sql2 .=  '@P'.($i-1) . $sqlarr[$i];
		} 
		return array($sql,$this->qstr($sql2),$max);
	}
	
	function PrepareSP($sql)
	{
		if (!$this->_has_mssql_init) {
			ADOConnection::outp( "PrepareSP: mssql_init only available since PHP 4.1.0");
			return $sql;
		}
		$stmt = mssql_init($sql,$this->_connectionID);
		if (!$stmt)  return $sql;
		return array($sql,$stmt);
	}
	
	// returns concatenated string
    // MSSQL requires integers to be cast as strings
    // automatically cast every datatype to VARCHAR(255)
    // @author David Rogers (introspectshun)
    function Concat()
    {
            $s = "";
            $arr = func_get_args();

            // Split single record on commas, if possible
            if (sizeof($arr) == 1) {
                foreach ($arr as $arg) {
                    $args = explode(',', $arg);
                }
                $arr = $args;
            }

            array_walk($arr, create_function('&$v', '$v = "CAST(" . $v . " AS VARCHAR(255))";'));
            $s = implode('+',$arr);
            if (sizeof($arr) > 0) return "$s";
            
			return '';
    }
	
	/* 
	Usage:
		$stmt = $db->PrepareSP('SP_RUNSOMETHING'); -- takes 2 params, @myid and @group
		
		# note that the parameter does not have @ in front!
		$db->Parameter($stmt,$id,'myid');
		$db->Parameter($stmt,$group,'group',false,64);
		$db->Execute($stmt);
		
		@param $stmt Statement returned by Prepare() or PrepareSP().
		@param $var PHP variable to bind to. Can set to null (for isNull support).
		@param $name Name of stored procedure variable name to bind to.
		@param [$isOutput] Indicates direction of parameter 0/false=IN  1=OUT  2= IN/OUT. This is ignored in oci8.
		@param [$maxLen] Holds an maximum length of the variable.
		@param [$type] The data type of $var. Legal values depend on driver.
		
		See mssql_bind documentation at php.net.
	*/
	function Parameter(&$stmt, &$var, $name, $isOutput=false, $maxLen=4000, $type=false)
	{
		if (!$this->_has_mssql_init) {
			ADOConnection::outp( "Parameter: mssql_bind only available since PHP 4.1.0");
			return false;
		}

		$isNull = is_null($var); // php 4.0.4 and above...
			
		if ($type === false) 
			switch(gettype($var)) {
			default:
			case 'string': $type = SQLVARCHAR; break;
			case 'double': $type = SQLFLT8; break;
			case 'integer': $type = SQLINT4; break;
			case 'boolean': $type = SQLINT1; break; # SQLBIT not supported in 4.1.0
			}
		
		if  ($this->debug) {
			$prefix = ($isOutput) ? 'Out' : 'In';
			$ztype = (empty($type)) ? 'false' : $type;
			ADOConnection::outp( "{$prefix}Parameter(\$stmt, \$php_var='$var', \$name='$name', \$maxLen=$maxLen, \$type=$ztype);");
		}
		/*
			See http://phplens.com/lens/lensforum/msgs.php?id=7231
			
			RETVAL is HARD CODED into php_mssql extension:
			The return value (a long integer value) is treated like a special OUTPUT parameter, 
			called "RETVAL" (without the @). See the example at mssql_execute to 
			see how it works. - type: one of this new supported PHP constants. 
				SQLTEXT, SQLVARCHAR,SQLCHAR, SQLINT1,SQLINT2, SQLINT4, SQLBIT,SQLFLT8 
		*/
		if ($name !== 'RETVAL') $name = '@'.$name;
		return mssql_bind($stmt[1], $name, $var, $type, $isOutput, $isNull, $maxLen);
	}
	
	/* 
		Unfortunately, it appears that mssql cannot handle varbinary > 255 chars
		So all your blobs must be of type "image".
		
		Remember to set in php.ini the following...
		
		; Valid range 0 - 2147483647. Default = 4096. 
		mssql.textlimit = 0 ; zero to pass through 

		; Valid range 0 - 2147483647. Default = 4096. 
		mssql.textsize = 0 ; zero to pass through 
	*/
	function UpdateBlob($table,$column,$val,$where,$blobtype='BLOB')
	{
	
		if (strtoupper($blobtype) == 'CLOB') {
			$sql = "UPDATE $table SET $column='" . $val . "' WHERE $where";
			return $this->Execute($sql) != false;
		}
		$sql = "UPDATE $table SET $column=0x".bin2hex($val)." WHERE $where";
		return $this->Execute($sql) != false;
	}
	
	// returns query ID if successful, otherwise false
	function _query($sql,$inputarr)
	{
		$this->_errorMsg = false;
		if (is_array($inputarr)) {
			
			# bind input params with sp_executesql: 
			# see http://www.quest-pipelines.com/newsletter-v3/0402_F.htm
			# works only with sql server 7 and newer
			if (!is_array($sql)) $sql = $this->Prepare($sql);
			$params = '';
			$decl = '';
			$i = 0;
			foreach($inputarr as $v) {
				if ($decl) {
					$decl .= ', ';
					$params .= ', ';
				}	
				if (is_string($v)) {
					$len = strlen($v);
					if ($len == 0) $len = 1;
					
					if ($len > 4000 ) {
						// NVARCHAR is max 4000 chars. Let's use NTEXT
						$decl .= "@P$i NTEXT";
					} else {
						$decl .= "@P$i NVARCHAR($len)";
					}

					$params .= "@P$i=N". (strncmp($v,"'",1)==0? $v : $this->qstr($v));
				} else if (is_integer($v)) {
					$decl .= "@P$i INT";
					$params .= "@P$i=".$v;
				} else if (is_float($v)) {
					$decl .= "@P$i FLOAT";
					$params .= "@P$i=".$v;