adodb-mysql.inc.php

这是一个嵌入式linux系统下的命令工具包

	{
		$this->_findschema($table,$schema);
		if ($schema) {
			$dbName = $this->database;
			$this->SelectDB($schema);
		}
		global $ADODB_FETCH_MODE;
		$save = $ADODB_FETCH_MODE;
		$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
		
		if ($this->fetchMode !== false) $savem = $this->SetFetchMode(false);
		$rs = $this->Execute(sprintf($this->metaColumnsSQL,$table));
		
		if ($schema) {
			$this->SelectDB($dbName);
		}
		
		if (isset($savem)) $this->SetFetchMode($savem);
		$ADODB_FETCH_MODE = $save;
		if (!is_object($rs)) {
			$false = false;
			return $false;
		}
			
		$retarr = array();
		while (!$rs->EOF){
			$fld = new ADOFieldObject();
			$fld->name = $rs->fields[0];
			$type = $rs->fields[1];
			
			// split type into type(length):
			$fld->scale = null;
			if (preg_match("/^(.+)\((\d+),(\d+)/", $type, $query_array)) {
				$fld->type = $query_array[1];
				$fld->max_length = is_numeric($query_array[2]) ? $query_array[2] : -1;
				$fld->scale = is_numeric($query_array[3]) ? $query_array[3] : -1;
			} elseif (preg_match("/^(.+)\((\d+)/", $type, $query_array)) {
				$fld->type = $query_array[1];
				$fld->max_length = is_numeric($query_array[2]) ? $query_array[2] : -1;
			} elseif (preg_match("/^(enum)\((.*)\)$/i", $type, $query_array)) {
				$fld->type = $query_array[1];
				$arr = explode(",",$query_array[2]);
				$fld->enums = $arr;
				$zlen = max(array_map("strlen",$arr)) - 2; // PHP >= 4.0.6
				$fld->max_length = ($zlen > 0) ? $zlen : 1;
			} else {
				$fld->type = $type;
				$fld->max_length = -1;
			}
			$fld->not_null = ($rs->fields[2] != 'YES');
			$fld->primary_key = ($rs->fields[3] == 'PRI');
			$fld->auto_increment = (strpos($rs->fields[5], 'auto_increment') !== false);
			$fld->binary = (strpos($type,'blob') !== false);
			$fld->unsigned = (strpos($type,'unsigned') !== false);
				
			if (!$fld->binary) {
				$d = $rs->fields[4];
				if ($d != '' && $d != 'NULL') {
					$fld->has_default = true;
					$fld->default_value = $d;
				} else {
					$fld->has_default = false;
				}
			}
			
			if ($save == ADODB_FETCH_NUM) {
				$retarr[] = $fld;
			} else {
				$retarr[strtoupper($fld->name)] = $fld;
			}
				$rs->MoveNext();
			}
		
			$rs->Close();
			return $retarr;	
	}
		
	// returns true or false
	function SelectDB($dbName) 
	{
		$this->database = $dbName;
		$this->databaseName = $dbName; # obsolete, retained for compat with older adodb versions
		if ($this->_connectionID) {
			return @mysql_select_db($dbName,$this->_connectionID);		
		}
		else return false;	
	}
	
	// parameters use PostgreSQL convention, not MySQL
	function &SelectLimit($sql,$nrows=-1,$offset=-1,$inputarr=false,$secs=0)
	{
		$offsetStr =($offset>=0) ? ((integer)$offset)."," : '';
		// jason judge, see http://phplens.com/lens/lensforum/msgs.php?id=9220
		if ($nrows < 0) $nrows = '18446744073709551615'; 
		
		if ($secs)
			$rs =& $this->CacheExecute($secs,$sql." LIMIT $offsetStr".((integer)$nrows),$inputarr);
		else
			$rs =& $this->Execute($sql." LIMIT $offsetStr".((integer)$nrows),$inputarr);
		return $rs;
	}
	
	// returns queryID or false
	function _query($sql,$inputarr)
	{
	//global $ADODB_COUNTRECS;
		//if($ADODB_COUNTRECS) 
		return mysql_query($sql,$this->_connectionID);
		//else return @mysql_unbuffered_query($sql,$this->_connectionID); // requires PHP >= 4.0.6
	}

	/*	Returns: the last error message from previous database operation	*/	
	function ErrorMsg() 
	{
	
		if ($this->_logsql) return $this->_errorMsg;
		if (empty($this->_connectionID)) $this->_errorMsg = @mysql_error();
		else $this->_errorMsg = @mysql_error($this->_connectionID);
		return $this->_errorMsg;
	}
	
	/*	Returns: the last error number from previous database operation	*/	
	function ErrorNo() 
	{
		if ($this->_logsql) return $this->_errorCode;
		if (empty($this->_connectionID))  return @mysql_errno();
		else return @mysql_errno($this->_connectionID);
	}
	
	// returns true or false
	function _close()
	{
		@mysql_close($this->_connectionID);
		$this->_connectionID = false;
	}

	
	/*
	* Maximum size of C field
	*/
	function CharMax()
	{
		return 255; 
	}
	
	/*
	* Maximum size of X field
	*/
	function TextMax()
	{
		return 4294967295; 
	}
	
	// "Innox - Juan Carlos Gonzalez" <jgonzalez#innox.com.mx>
	function MetaForeignKeys( $table, $owner = FALSE, $upper = FALSE, $associative = FALSE )
     {
         if ( !empty($owner) ) {
            $table = "$owner.$table";
         }
         $a_create_table = $this->getRow(sprintf('SHOW CREATE TABLE %s', $table));
		 if ($associative) $create_sql = $a_create_table["Create Table"];
         else $create_sql  = $a_create_table[1];

         $matches = array();

         if (!preg_match_all("/FOREIGN KEY \(`(.*?)`\) REFERENCES `(.*?)` \(`(.*?)`\)/", $create_sql, $matches)) return false;
	     $foreign_keys = array();	 	 
         $num_keys = count($matches[0]);
         for ( $i = 0;  $i < $num_keys;  $i ++ ) {
             $my_field  = explode('`, `', $matches[1][$i]);
             $ref_table = $matches[2][$i];
             $ref_field = explode('`, `', $matches[3][$i]);

             if ( $upper ) {
                 $ref_table = strtoupper($ref_table);
             }

             $foreign_keys[$ref_table] = array();
             $num_fields = count($my_field);
             for ( $j = 0;  $j < $num_fields;  $j ++ ) {
                 if ( $associative ) {
                     $foreign_keys[$ref_table][$ref_field[$j]] = $my_field[$j];
                 } else {
                     $foreign_keys[$ref_table][] = "{$my_field[$j]}={$ref_field[$j]}";
                 }
             }
         }
         
         return  $foreign_keys;
     }
	 
	
}
	
/*--------------------------------------------------------------------------------------
	 Class Name: Recordset
--------------------------------------------------------------------------------------*/


class ADORecordSet_mysql extends ADORecordSet{	
	
	var $databaseType = "mysql";
	var $canSeek = true;
	
	function ADORecordSet_mysql($queryID,$mode=false) 
	{
		if ($mode === false) { 
			global $ADODB_FETCH_MODE;
			$mode = $ADODB_FETCH_MODE;
		}
		switch ($mode)
		{
		case ADODB_FETCH_NUM: $this->fetchMode = MYSQL_NUM; break;
		case ADODB_FETCH_ASSOC:$this->fetchMode = MYSQL_ASSOC; break;
		case ADODB_FETCH_DEFAULT:
		case ADODB_FETCH_BOTH:
		default:
			$this->fetchMode = MYSQL_BOTH; break;
		}
		$this->adodbFetchMode = $mode;
		$this->ADORecordSet($queryID);	
	}
	
	function _initrs()
	{
	//GLOBAL $ADODB_COUNTRECS;
	//	$this->_numOfRows = ($ADODB_COUNTRECS) ? @mysql_num_rows($this->_queryID):-1;
		$this->_numOfRows = @mysql_num_rows($this->_queryID);
		$this->_numOfFields = @mysql_num_fields($this->_queryID);
	}
	
	function &FetchField($fieldOffset = -1) 
	{	
		if ($fieldOffset != -1) {
			$o = @mysql_fetch_field($this->_queryID, $fieldOffset);
			$f = @mysql_field_flags($this->_queryID,$fieldOffset);
			$o->max_length = @mysql_field_len($this->_queryID,$fieldOffset); // suggested by: Jim Nicholson ([e-mail])
			//$o->max_length = -1; // mysql returns the max length less spaces -- so it is unrealiable
			$o->binary = (strpos($f,'binary')!== false);
		}
		else if ($fieldOffset == -1) {	/*	The $fieldOffset argument is not provided thus its -1 	*/
			$o = @mysql_fetch_field($this->_queryID);
		$o->max_length = @mysql_field_len($this->_queryID); // suggested by: Jim Nicholson ([e-mail])
		//$o->max_length = -1; // mysql returns the max length less spaces -- so it is unrealiable
		}
			
		return $o;
	}

	function &GetRowAssoc($upper=true)
	{
		if ($this->fetchMode == MYSQL_ASSOC && !$upper) return $this->fields;
		$row =& ADORecordSet::GetRowAssoc($upper);
		return $row;
	}
	
	/* Use associative array to get fields array */
	function Fields($colname)
	{	
		// added @ by "Michael William Miller" <[e-mail]>
		if ($this->fetchMode != MYSQL_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($row)
	{
		if ($this->_numOfRows == 0) return false;
		return @mysql_data_seek($this->_queryID,$row);
	}
	
	function MoveNext()
	{
		//return adodb_movenext($this);
		//if (defined('ADODB_EXTENSION')) return adodb_movenext($this);
		if (@$this->fields = mysql_fetch_array($this->_queryID,$this->fetchMode)) {
			$this->_currentRow += 1;
			return true;
		}
		if (!$this->EOF) {
			$this->_currentRow += 1;
			$this->EOF = true;
		}
		return false;
	}
	
	function _fetch()
	{
		$this->fields =  @mysql_fetch_array($this->_queryID,$this->fetchMode);
		return is_array($this->fields);
	}
	
	function _close() {
		@mysql_free_result($this->_queryID);	
		$this->_queryID = false;	
	}
	
	function MetaType($t,$len=-1,$fieldobj=false)
	{
		if (is_object($t)) {
			$fieldobj = $t;
			$t = $fieldobj->type;
			$len = $fieldobj->max_length;
		}
		
		$len = -1; // mysql max_length is not accurate
		switch (strtoupper($t)) {
		case 'STRING': 
		case 'CHAR':
		case 'VARCHAR': 
		case 'TINYBLOB': 
		case 'TINYTEXT': 
		case 'ENUM': 
		case 'SET': 
			if ($len <= $this->blobSize) return 'C';
			
		case 'TEXT':
		case 'LONGTEXT': 
		case 'MEDIUMTEXT':
			return 'X';
			
		// php_mysql extension always returns 'blob' even if 'text'
		// so we have to check whether binary...
		case 'IMAGE':
		case 'LONGBLOB': 
		case 'BLOB':
		case 'MEDIUMBLOB':
			return !empty($fieldobj->binary) ? 'B' : 'X';
			
		case 'YEAR':
		case 'DATE': return 'D';
		
		case 'TIME':
		case 'DATETIME':
		case 'TIMESTAMP': return 'T';
		
		case 'INT': 
		case 'INTEGER':
		case 'BIGINT':
		case 'TINYINT':
		case 'MEDIUMINT':
		case 'SMALLINT': 
			
			if (!empty($fieldobj->primary_key)) return 'R';
			else return 'I';
		
		default: return 'N';
		}
	}

}

class ADORecordSet_ext_mysql extends ADORecordSet_mysql {	
	function ADORecordSet_ext_mysql($queryID,$mode=false) 
	{
		if ($mode === false) { 
			global $ADODB_FETCH_MODE;
			$mode = $ADODB_FETCH_MODE;
		}
		switch ($mode)
		{
		case ADODB_FETCH_NUM: $this->fetchMode = MYSQL_NUM; break;
		case ADODB_FETCH_ASSOC:$this->fetchMode = MYSQL_ASSOC; break;
		case ADODB_FETCH_DEFAULT:
		case ADODB_FETCH_BOTH:
		default:
		$this->fetchMode = MYSQL_BOTH; break;
		}
		$this->adodbFetchMode = $mode;
		$this->ADORecordSet($queryID);
	}
	
	function MoveNext()
	{
		return @adodb_movenext($this);
	}
}


}
?>