adodb-postgres64.inc.php

这是一个嵌入式linux系统下的命令工具包

		fclose($fd);
		
		$oid = pg_lo_create($this->_connectionID);
		$handle = pg_lo_open($this->_connectionID, $oid, 'w');
		pg_lo_write($handle, $contents);
		pg_lo_close($handle);
		
		// $oid = pg_lo_import ($path); 
		pg_exec($this->_connectionID, "commit"); 
		$rs = ADOConnection::UpdateBlob($table,$column,$oid,$where,$blobtype); 
		$rez = !empty($rs); 
		return $rez; 
	} 
	
	/*
	* Deletes/Unlinks a Blob from the database, otherwise it 
	* will be left behind
	*
	* Returns TRUE on success or FALSE on failure.
	*
	* contributed by Todd Rogers todd#windfox.net
	*/
	function BlobDelete( $blob )
	{
		pg_exec ($this->_connectionID, "begin");
		$result = @pg_lo_unlink($blob);
		pg_exec ($this->_connectionID, "commit");
		return( $result );
	}

	/*
		Hueristic - not guaranteed to work.
	*/
	function GuessOID($oid)
	{
		if (strlen($oid)>16) return false;
		return is_numeric($oid);
	}
	
	/* 
	* If an OID is detected, then we use pg_lo_* to open the oid file and read the
	* real blob from the db using the oid supplied as a parameter. If you are storing
	* blobs using bytea, we autodetect and process it so this function is not needed.
	*
	* contributed by Mattia Rossi [e-mail]
	*
	* see http://www.postgresql.org/idocs/index.php?largeobjects.html
	*
	* Since adodb 4.54, this returns the blob, instead of sending it to stdout. Also
	* added maxsize parameter, which defaults to $db->maxblobsize if not defined.
	*/ 
	function BlobDecode($blob,$maxsize=false,$hastrans=true) 
	{
		if (!$this->GuessOID($blob)) return $blob;
		
		if ($hastrans) @pg_exec($this->_connectionID,"begin"); 
		$fd = @pg_lo_open($this->_connectionID,$blob,"r");
		if ($fd === false) {
			if ($hastrans) @pg_exec($this->_connectionID,"commit");
			return $blob;
		}
		if (!$maxsize) $maxsize = $this->maxblobsize;
		$realblob = @pg_loread($fd,$maxsize); 
		@pg_loclose($fd); 
		if ($hastrans) @pg_exec($this->_connectionID,"commit"); 
		return $realblob;
	}
	
	/* 
		See http://www.postgresql.org/idocs/index.php?datatype-binary.html
	 	
		NOTE: SQL string literals (input strings) must be preceded with two backslashes 
		due to the fact that they must pass through two parsers in the PostgreSQL 
		backend.
	*/
	function BlobEncode($blob)
	{
		if (ADODB_PHPVER >= 0x4200) return pg_escape_bytea($blob);
		
		/*92=backslash, 0=null, 39=single-quote*/
		$badch = array(chr(92),chr(0),chr(39)); # \  null  '
		$fixch = array('\\\\134','\\\\000','\\\\047');
		return adodb_str_replace($badch,$fixch,$blob);
		
		// note that there is a pg_escape_bytea function only for php 4.2.0 or later
	}
	
	// assumes bytea for blob, and varchar for clob
	function UpdateBlob($table,$column,$val,$where,$blobtype='BLOB')
	{
	
		if ($blobtype == 'CLOB') {
    		return $this->Execute("UPDATE $table SET $column=" . $this->qstr($val) . " WHERE $where");
		}
		// do not use bind params which uses qstr(), as blobencode() already quotes data
		return $this->Execute("UPDATE $table SET $column='".$this->BlobEncode($val)."'::bytea WHERE $where");
	}
	
	function OffsetDate($dayFraction,$date=false)
	{		
		if (!$date) $date = $this->sysDate;
		else if (strncmp($date,"'",1) == 0) {
			$len = strlen($date);
			if (10 <= $len && $len <= 12) $date = 'date '.$date;
			else $date = 'timestamp '.$date;
		}
		return "($date+interval'$dayFraction days')";
	}
	

	// for schema support, pass in the $table param "$schema.$tabname".
	// converts field names to lowercase, $upper is ignored
	// see http://phplens.com/lens/lensforum/msgs.php?id=14018 for more info
	function &MetaColumns($table,$normalize=true) 
	{
	global $ADODB_FETCH_MODE;
	
		$schema = false;
		$false = false;
		$this->_findschema($table,$schema);
		
		if ($normalize) $table = strtolower($table);

		$save = $ADODB_FETCH_MODE;
		$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
		if ($this->fetchMode !== false) $savem = $this->SetFetchMode(false);
		
		if ($schema) $rs =& $this->Execute(sprintf($this->metaColumnsSQL1,$table,$table,$schema));
		else $rs =& $this->Execute(sprintf($this->metaColumnsSQL,$table,$table));
		if (isset($savem)) $this->SetFetchMode($savem);
		$ADODB_FETCH_MODE = $save;
		
		if ($rs === false) {
			return $false;
		}
		if (!empty($this->metaKeySQL)) {
			// If we want the primary keys, we have to issue a separate query
			// Of course, a modified version of the metaColumnsSQL query using a 
			// LEFT JOIN would have been much more elegant, but postgres does 
			// not support OUTER JOINS. So here is the clumsy way.
			
			$ADODB_FETCH_MODE = ADODB_FETCH_ASSOC;
			
			$rskey = $this->Execute(sprintf($this->metaKeySQL,($table)));
			// fetch all result in once for performance.
			$keys =& $rskey->GetArray();
			if (isset($savem)) $this->SetFetchMode($savem);
			$ADODB_FETCH_MODE = $save;
			
			$rskey->Close();
			unset($rskey);
		}

		$rsdefa = array();
		if (!empty($this->metaDefaultsSQL)) {
			$ADODB_FETCH_MODE = ADODB_FETCH_ASSOC;
			$sql = sprintf($this->metaDefaultsSQL, ($table));
			$rsdef = $this->Execute($sql);
			if (isset($savem)) $this->SetFetchMode($savem);
			$ADODB_FETCH_MODE = $save;
			
			if ($rsdef) {
				while (!$rsdef->EOF) {
					$num = $rsdef->fields['num'];
					$s = $rsdef->fields['def'];
					if (strpos($s,'::')===false && substr($s, 0, 1) == "'") { /* quoted strings hack... for now... fixme */
						$s = substr($s, 1);
						$s = substr($s, 0, strlen($s) - 1);
					}

					$rsdefa[$num] = $s;
					$rsdef->MoveNext();
				}
			} else {
				ADOConnection::outp( "==> SQL => " . $sql);
			}
			unset($rsdef);
		}
	
		$retarr = array();
		while (!$rs->EOF) { 	
			$fld = new ADOFieldObject();
			$fld->name = $rs->fields[0];
			$fld->type = $rs->fields[1];
			$fld->max_length = $rs->fields[2];
			if ($fld->max_length <= 0) $fld->max_length = $rs->fields[3]-4;
			if ($fld->max_length <= 0) $fld->max_length = -1;
			if ($fld->type == 'numeric') {
				$fld->scale = $fld->max_length & 0xFFFF;
				$fld->max_length >>= 16;
			}
			// dannym
			// 5 hasdefault; 6 num-of-column
			$fld->has_default = ($rs->fields[5] == 't');
			if ($fld->has_default) {
				$fld->default_value = $rsdefa[$rs->fields[6]];
			}

			//Freek
			$fld->not_null = $rs->fields[4] == 't';
			
			
			// Freek
			if (is_array($keys)) {
				foreach($keys as $key) {
					if ($fld->name == $key['column_name'] AND $key['primary_key'] == 't') 
						$fld->primary_key = true;
					if ($fld->name == $key['column_name'] AND $key['unique_key'] == 't') 
						$fld->unique = true; // What name is more compatible?
				}
			}
			
			if ($ADODB_FETCH_MODE == ADODB_FETCH_NUM) $retarr[] = $fld;	
			else $retarr[($normalize) ? strtoupper($fld->name) : $fld->name] = $fld;
			
			$rs->MoveNext();
		}
		$rs->Close();
		if (empty($retarr))
			return  $false;
		else
			return $retarr;	
		
	}

	  function &MetaIndexes ($table, $primary = FALSE)
      {
         global $ADODB_FETCH_MODE;
                
				$schema = false;
				$this->_findschema($table,$schema);

				if ($schema) { // requires pgsql 7.3+ - pg_namespace used.
					$sql = '
SELECT c.relname as "Name", i.indisunique as "Unique", i.indkey as "Columns" 
FROM pg_catalog.pg_class c 
JOIN pg_catalog.pg_index i ON i.indexrelid=c.oid 
JOIN pg_catalog.pg_class c2 ON c2.oid=i.indrelid
	,pg_namespace n 
WHERE (c2.relname=\'%s\' or c2.relname=lower(\'%s\')) and c.relnamespace=c2.relnamespace and c.relnamespace=n.oid and n.nspname=\'%s\'';
				} else {
	                $sql = '
SELECT c.relname as "Name", i.indisunique as "Unique", i.indkey as "Columns"
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_index i ON i.indexrelid=c.oid
JOIN pg_catalog.pg_class c2 ON c2.oid=i.indrelid
WHERE (c2.relname=\'%s\' or c2.relname=lower(\'%s\'))';
    			}
				            
                if ($primary == FALSE) {
                	$sql .= ' AND i.indisprimary=false;';
                }
                
                $save = $ADODB_FETCH_MODE;
                $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
                if ($this->fetchMode !== FALSE) {
                        $savem = $this->SetFetchMode(FALSE);
                }
                
                $rs = $this->Execute(sprintf($sql,$table,$table,$schema));
                if (isset($savem)) {
                        $this->SetFetchMode($savem);
                }
                $ADODB_FETCH_MODE = $save;

                if (!is_object($rs)) {
                	$false = false;
					return $false;
                }
				
                $col_names = $this->MetaColumnNames($table,true);
                $indexes = array();
                while ($row = $rs->FetchRow()) {
                        $columns = array();
                        foreach (explode(' ', $row[2]) as $col) {
                                $columns[] = $col_names[$col - 1];
                        }
                        
                        $indexes[$row[0]] = array(
                                'unique' => ($row[1] == 't'),
                                'columns' => $columns
                        );
                }
                return $indexes;
        }

	// returns true or false
	//
	// examples:
	// 	$db->Connect("host=host1 user=user1 password=secret port=4341");
	// 	$db->Connect('host1','user1','secret');
	function _connect($str,$user='',$pwd='',$db='',$ctype=0)
	{
		
		if (!function_exists('pg_connect')) return null;
		
		$this->_errorMsg = false;
		
		if ($user || $pwd || $db) {
			$user = adodb_addslashes($user);
			$pwd = adodb_addslashes($pwd);
			if (strlen($db) == 0) $db = 'template1';
			$db = adodb_addslashes($db);
		   	if ($str)  {
			 	$host = split(":", $str);
				if ($host[0]) $str = "host=".adodb_addslashes($host[0]);
				else $str = 'host=localhost';
				if (isset($host[1])) $str .= " port=$host[1]";
				else if (!empty($this->port)) $str .= " port=".$this->port;
			}
		   		if ($user) $str .= " user=".$user;
		   		if ($pwd)  $str .= " password=".$pwd;
				if ($db)   $str .= " dbname=".$db;
		}

		//if ($user) $linea = "user=$user host=$linea password=$pwd dbname=$db port=5432";
		
		if ($ctype === 1) { // persistent
			$this->_connectionID = pg_pconnect($str);
		} else {
			if ($ctype === -1) { // nconnect, we trick pgsql ext by changing the connection str
			static $ncnt;
			
				if (empty($ncnt)) $ncnt = 1;
				else $ncnt += 1;
				
				$str .= str_repeat(' ',$ncnt);
			}
			$this->_connectionID = pg_connect($str);
		}
		if ($this->_connectionID === false) return false;
		$this->Execute("set datestyle='ISO'");
		return true;
	}
	
	function _nconnect($argHostname, $argUsername, $argPassword, $argDatabaseName)
	{
	 	return $this->_connect($argHostname, $argUsername, $argPassword, $argDatabaseName,-1);
	}
	 
	// returns true or false
	//
	// examples:
	// 	$db->PConnect("host=host1 user=user1 password=secret port=4341");
	// 	$db->PConnect('host1','user1','secret');
	function _pconnect($str,$user='',$pwd='',$db='')
	{
		return $this->_connect($str,$user,$pwd,$db,1);
	}