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egroupware/phpgwapi/inc/class.egw_db.inc.php

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<?php
/**************************************************************************\
* eGroupWare API - database support via ADOdb *
* ------------------------------------------------------------------------ *
* This program is free software; you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as published *
* by the Free Software Foundation; either version 2.1 of the License, or *
* any later version. *
\**************************************************************************/
/* $Id$ */
/**
* Database abstraction library
*
* This allows eGroupWare to use multiple database backends via ADOdb
*
* @package api
* @subpackage db
* @author Ralf Becker <RalfBecker@outdoor-training.de>
* @license LGPL
*/
// some constanst for pre php4.3
if (!defined('PHP_SHLIB_SUFFIX'))
{
define('PHP_SHLIB_SUFFIX',strtoupper(substr(PHP_OS, 0,3)) == 'WIN' ? 'dll' : 'so');
}
if (!defined('PHP_SHLIB_PREFIX'))
{
define('PHP_SHLIB_PREFIX',PHP_SHLIB_SUFFIX == 'dll' ? 'php_' : '');
}
if(empty($GLOBALS['egw_info']['server']['db_type']))
{
$GLOBALS['egw_info']['server']['db_type'] = 'mysql';
}
include_once(EGW_API_INC.'/adodb/adodb.inc.php');
class egw_db
{
/**
* @var string $type translated database type: mysqlt+mysqli ==> mysql, same for odbc-types
*/
var $Type = '';
/**
* @var string $type database type as defined in the header.inc.php, eg. mysqlt
*/
var $setupType = '';
/**
* @var string $Host database host to connect to
*/
var $Host = '';
/**
* @var string $Port port number of database to connect to
*/
var $Port = '';
/**
* @var string $Database name of database to use
*/
var $Database = '';
/**
* @var string $User name of database user
*/
var $User = '';
/**
* @var string $Password password for database user
*/
var $Password = '';
/**
* @var int $Auto_Free automatically free results - 0 no, 1 yes
*/
var $Auto_Free = 0;
/**
* @var int $Debug enable debuging - 0 no, 1 yes
*/
var $Debug = 0;
/**
* @var string $Halt_On_Error "yes" (halt with message), "no" (ignore errors quietly), "report" (ignore errror, but spit a warning)
*/
var $Halt_On_Error = 'yes';
/**
* @var array $Record current record
*/
var $Record = array();
/**
* @var int row number for current record
*/
var $Row;
/**
* @var int $Errno internal rdms error number for last error
*/
var $Errno = 0;
/**
* @var string descriptive text from last error
*/
var $Error = '';
//i am not documenting private vars - skwashd :)
var $xmlrpc = False;
var $soap = False;
var $Link_ID = 0;
var $privat_Link_ID = False; // do we use a privat Link_ID or a reference to the global ADOdb object
var $Query_ID = 0;
/**
* @var array $capabilities, defaults will be changed be method set_capabilities($ado_driver,$db_version)
*/
var $capabilities = array(
'sub_queries' => true, // will be set to false for mysql < 4.1
'union' => true, // will be set to false for mysql < 4.0
'outer_join' => false, // does the DB has an outer join, will be set eg. for postgres
'distinct_on_text' => true, // is the DB able to use DISTINCT with a text or blob column
'like_on_text' => true, // is the DB able to use LIKE with text columns
'name_case' => 'upper', // case of returned column- and table-names: upper, lower(pgSql), preserv(MySQL)
'client_encoding' => false, // db uses a changeable clientencoding
'case_insensitive_like' => 'LIKE', // case insensitive version of like, eg. ILIKE for postgres
'require_truncate_varchar' => false,// DB requires varchar columns to be truncated to the max. size (eg. Postgres)
'order_on_text' => true, // is the DB able to order by a given text column, boolean or
); // string for sprintf for a cast (eg. 'CAST(%s AS varchar)')
var $prepared_sql = array(); // sql is the index
/**
* @param string $query query to be executed (optional)
*/
function db($query = '')
{
$this->query($query);
}
/**
* @return int current connection id
*/
function link_id()
{
return $this->Link_ID;
}
/**
* @return int id of current query
*/
function query_id()
{
return $this->Query_ID;
}
/**
* Open a connection to a database
*
* @param string $Database name of database to use (optional)
* @param string $Host database host to connect to (optional)
* @param string $Port database port to connect to (optional)
* @param string $User name of database user (optional)
* @param string $Password password for database user (optional)
*/
function connect($Database = NULL, $Host = NULL, $Port = NULL, $User = NULL, $Password = NULL,$Type = NULL)
{
/* Handle defaults */
if (!is_null($Database) && $Database)
{
$this->Database = $Database;
}
if (!is_null($Host) && $Host)
{
$this->Host = $Host;
}
if (!is_null($Port) && $Port)
{
$this->Port = $Port;
}
if (!is_null($User) && $User)
{
$this->User = $User;
}
if (!is_null($Password) && $Password)
{
$this->Password = $Password;
}
if (!is_null($Type) && $Type)
{
$this->Type = $Type;
}
elseif (!$this->Type)
{
$this->Type = $GLOBALS['egw_info']['server']['db_type'];
}
if (!$this->Link_ID)
{
foreach(array('Host','Database','User','Password') as $name)
{
$$name = $this->$name;
}
$this->setupType = $php_extension = $type = $this->Type;
switch($this->Type) // convert to ADO db-type-names
{
case 'pgsql':
$type = 'postgres'; // name in ADOdb
// create our own pgsql connection-string, to allow unix domain soccets if !$Host
$Host = "dbname=$this->Database".($this->Host ? " host=$this->Host".($this->Port ? " port=$this->Port" : '') : '').
" user=$this->User".($this->Password ? " password='".addslashes($this->Password)."'" : '');
$User = $Password = $Database = ''; // to indicate $Host is a connection-string
break;
case 'odbc_mssql':
$php_extension = 'odbc';
$this->Type = 'mssql';
// fall through
case 'mssql':
if ($this->Port) $Host .= ','.$this->Port;
break;
case 'odbc_oracle':
$php_extension = 'odbc';
$this->Type = 'oracle';
break;
case 'oracle':
$php_extension = $type = 'oci8';
break;
case 'sapdb':
$this->Type = 'maxdb';
// fall through
case 'maxdb':
$type ='sapdb'; // name in ADOdb
$php_extension = 'odbc';
break;
case 'mysqlt':
$php_extension = 'mysql'; // you can use $this->setupType to determine if it's mysqlt or mysql
// fall through
case 'mysqli':
$this->Type = 'mysql';
// fall through
default:
if ($this->Port) $Host .= ':'.$this->Port;
break;
}
if (!is_object($GLOBALS['egw']->ADOdb) || // we have no connection so far
(is_object($GLOBALS['egw']->db) && // we connect to a different db, then the global one
($this->Type != $GLOBALS['egw']->db->Type ||
$this->Database != $GLOBALS['egw']->db->Database ||
$this->User != $GLOBALS['egw']->db->User ||
$this->Host != $GLOBALS['egw']->db->Host ||
$this->Port != $GLOBALS['egw']->db->Port)))
{
if (!extension_loaded($php_extension) && (!function_exists('dl') ||
!dl(PHP_SHLIB_PREFIX.$php_extension.'.'.PHP_SHLIB_SUFFIX)))
{
$this->halt("Necessary php database support for $this->Type (".PHP_SHLIB_PREFIX.$php_extension.'.'.PHP_SHLIB_SUFFIX.") not loaded and can't be loaded, exiting !!!");
return 0; // in case error-reporting = 'no'
}
if (!is_object($GLOBALS['egw']->ADOdb)) // use the global object to store the connection
{
$this->Link_ID = &$GLOBALS['egw']->ADOdb;
}
else
{
$this->privat_Link_ID = True; // remember that we use a privat Link_ID for disconnect
}
$this->Link_ID = ADONewConnection($type);
if (!$this->Link_ID)
{
$this->halt("No ADOdb support for '$type' ($this->Type) !!!");
return 0; // in case error-reporting = 'no'
}
$connect = $GLOBALS['egw_info']['server']['db_persistent'] ? 'PConnect' : 'Connect';
if (($Ok = $this->Link_ID->$connect($Host, $User, $Password)))
{
$this->ServerInfo = $this->Link_ID->ServerInfo();
$this->set_capabilities($type,$this->ServerInfo['version']);
if($Database)
{
$Ok = $this->Link_ID->SelectDB($Database);
}
}
if (!$Ok)
{
$this->halt("ADOdb::$connect($Host, $User, \$Password, $Database) failed.");
return 0; // in case error-reporting = 'no'
}
if ($this->Debug)
{
echo function_backtrace();
echo "<p>new ADOdb connection to $this->Type://$this->Host/$this->Database: Link_ID".($this->Link_ID === $GLOBALS['egw']->ADOdb ? '===' : '!==')."\$GLOBALS[egw]->ADOdb</p>";
//echo "<p>".print_r($this->Link_ID->ServerInfo(),true)."</p>\n";
_debug_array($this);
echo "\$GLOBALS[egw]->db="; _debug_array($GLOBALS[egw]->db);
}
if ($this->Type == 'mssql')
{
// this is the format ADOdb expects
$this->Link_ID->Execute('SET DATEFORMAT ymd');
// sets the limit to the maximum
ini_set('mssql.textlimit',2147483647);
ini_set('mssql.sizelimit',2147483647);
}
}
else
{
$this->Link_ID = &$GLOBALS['egw']->ADOdb;
}
}
// next ADOdb version: if (!$this->Link_ID->isConnected()) $this->Link_ID->Connect();
if (!$this->Link_ID->_connectionID) $this->Link_ID->Connect();
//echo "<p>".print_r($this->Link_ID->ServerInfo(),true)."</p>\n";
return $this->Link_ID;
}
/**
* changes defaults set in class-var $capabilities depending on db-type and -version
*
* @param string $ado_driver mysql, postgres, mssql, sapdb, oci8
* @param string $db_version version-number of connected db-server, as reported by ServerInfo
*/
function set_capabilities($adodb_driver,$db_version)
{
switch($adodb_driver)
{
case 'mysql':
case 'mysqlt':
case 'mysqli':
$this->capabilities['sub_queries'] = (float) $db_version >= 4.1;
$this->capabilities['union'] = (float) $db_version >= 4.0;
$this->capabilities['name_case'] = 'preserv';
$this->capabilities['client_encoding'] = (float) $db_version >= 4.1;
break;
case 'postgres':
$this->capabilities['name_case'] = 'lower';
$this->capabilities['client_encoding'] = (float) $db_version >= 7.4;
$this->capabilities['outer_join'] = true;
$this->capabilities['case_insensitive_like'] = 'ILIKE';
$this->capabilities['require_truncate_varchar'] = true;
break;
case 'mssql':
$this->capabilities['distinct_on_text'] = false;
$this->capabilities['order_on_text'] = 'CAST (%s AS varchar)';
break;
case 'maxdb': // if Lim ever changes it to maxdb ;-)
case 'sapdb':
$this->capabilities['distinct_on_text'] = false;
$this->capabilities['like_on_text'] = (float) $db_version >= 7.6;
$this->capabilities['order_on_text'] = false;
break;
}
//echo "db::set_capabilities('$adodb_driver',$db_version)"; _debug_array($this->capabilities);
}
/**
* Close a connection to a database
*/
function disconnect()
{
if (!$this->privat_Link_ID)
{
unset($GLOBALS['egw']->ADOdb);
}
unset($this->Link_ID);
$this->Link_ID = 0;
}
/**
* Escape strings before sending them to the database
*
* @deprecated use quote($value,$type='') instead
* @param string $str the string to be escaped
* @return string escaped sting
*/
function db_addslashes($str)
{
if (!isset($str) || $str == '')
{
return '';
}
if (!$this->Link_ID && !$this->connect())
{
return False;
}
return $this->Link_ID->addq($str);
}
/**
* Convert a unix timestamp to a rdms specific timestamp
*
* @param int unix timestamp
* @return string rdms specific timestamp
*/
function to_timestamp($epoch)
{
if (!$this->Link_ID && !$this->connect())
{
return False;
}
// the substring is needed as the string is already in quotes
return substr($this->Link_ID->DBTimeStamp($epoch),1,-1);
}
/**
* Convert a rdms specific timestamp to a unix timestamp
*
* @param string rdms specific timestamp
* @return int unix timestamp
*/
function from_timestamp($timestamp)
{
if (!$this->Link_ID && !$this->connect())
{
return False;
}
return $this->Link_ID->UnixTimeStamp($timestamp);
}
/**
* convert a rdbms specific boolean value
*
* @param string $val boolean value in db-specfic notation
* @return boolean
*/
function from_bool($val)
{
return $val && $val{0} !== 'f'; // everthing other then 0 or f[alse] is returned as true
}
/**
* Discard the current query result
*/
function free()
{
unset($this->Query_ID); // else copying of the db-object does not work
$this->Query_ID = 0;
}
/**
* Execute a query
*
* @param string $Query_String the query to be executed
* @param int $line the line method was called from - use __LINE__
* @param string $file the file method was called from - use __FILE__
* @param int $offset row to start from, default 0
* @param int $num_rows number of rows to return (optional), default -1 = all, 0 will use $GLOBALS['egw_info']['user']['preferences']['common']['maxmatchs']
* @param array/boolean $inputarr array for binding variables to parameters or false (default)
* @return ADORecordSet or false, if the query fails
*/
function query($Query_String, $line = '', $file = '', $offset=0, $num_rows=-1,$inputarr=false)
{
if ($Query_String == '')
{
return 0;
}
if (!$this->Link_ID && !$this->connect())
{
return False;
}
# New query, discard previous result.
if ($this->Query_ID)
{
$this->free();
}
if ($this->Link_ID->fetchMode != ADODB_FETCH_BOTH)
{
$this->Link_ID->SetFetchMode(ADODB_FETCH_BOTH);
}
if (!$num_rows)
{
$num_rows = $GLOBALS['egw_info']['user']['preferences']['common']['maxmatchs'];
}
if ($num_rows > 0)
{
$this->Query_ID = $this->Link_ID->SelectLimit($Query_String,$num_rows,(int)$offset,$inputarr);
}
else
{
$this->Query_ID = $this->Link_ID->Execute($Query_String,$inputarr);
}
$this->Row = 0;
$this->Errno = $this->Link_ID->ErrorNo();
$this->Error = $this->Link_ID->ErrorMsg();
if (! $this->Query_ID)
{
$this->halt("Invalid SQL: ".(is_array($Query_String)?$Query_String[0]:$Query_String).
($inputarr ? "<br>Parameters: '".implode("','",$inputarr)."'":''),
$line, $file);
}
return $this->Query_ID;
}
/**
* Execute a query with limited result set
*
* @param string $Query_String the query to be executed
* @param int $offset row to start from, default 0
* @param int $line the line method was called from - use __LINE__
* @param string $file the file method was called from - use __FILE__
* @param int $num_rows number of rows to return (optional), default -1 = all, 0 will use $GLOBALS['egw_info']['user']['preferences']['common']['maxmatchs']
* @param array/boolean $inputarr array for binding variables to parameters or false (default)
* @return ADORecordSet or false, if the query fails
*/
function limit_query($Query_String, $offset, $line = '', $file = '', $num_rows = '',$inputarr=false)
{
return $this->query($Query_String,$line,$file,$offset,$num_rows,$inputarr);
}
/**
* Move to the next row in the results set
*
* Specifying a fetch_mode only works for newly fetched rows, the first row always gets fetched by query!!!
*
* @param int $fetch_mode ADODB_FETCH_BOTH = numerical+assoc keys (eGW default), ADODB_FETCH_ASSOC or ADODB_FETCH_NUM
* @return bool was another row found?
*/
function next_record($fetch_mode=ADODB_FETCH_BOTH)
{
if (!$this->Query_ID)
{
$this->halt('next_record called with no query pending.');
return 0;
}
if ($this->Link_ID->fetchMode != $fetch_mode)
{
$this->Link_ID->SetFetchMode($fetch_mode);
}
if ($this->Row) // first row is already fetched
{
$this->Query_ID->MoveNext();
}
++$this->Row;
$this->Record = $this->Query_ID->fields;
if ($this->Query_ID->EOF || !$this->Query_ID->RecordCount() || !is_array($this->Record))
{
return False;
}
if ($this->capabilities['name_case'] == 'upper') // maxdb, oracle, ...
{
switch($fetch_mode)
{
case ADODB_FETCH_ASSOC:
$this->Record = array_change_key_case($this->Record);
break;
case ADODB_FETCH_NUM:
$this->Record = array_values($this->Record);
break;
default:
$this->Record = array_change_key_case($this->Record);
if (!isset($this->Record[0]))
{
$this->Record += array_values($this->Record);
}
break;
}
}
return True;
}
/**
* Move to position in result set
*
* @param int $pos required row (optional), default first row
* @return boolean true if sucessful or false if not found
*/
function seek($pos = 0)
{
if (!$this->Query_ID || !$this->Query_ID->Move($this->Row = $pos))
{
$this->halt("seek($pos) failed: resultset has " . $this->num_rows() . " rows");
$this->Query_ID->Move( $this->num_rows() );
$this->Row = $this->num_rows();
return False;
}
return True;
}
/**
* Begin Transaction
*
* @return int/boolean current transaction-id, of false if no connection
*/
function transaction_begin()
{
if (!$this->Link_ID && !$this->connect())
{
return False;
}
//return $this->Link_ID->BeginTrans();
return $this->Link_ID->StartTrans();
}
/**
* Complete the transaction
*
* @return bool True if sucessful, False if fails
*/
function transaction_commit()
{
if (!$this->Link_ID && !$this->connect())
{
return False;
}
//return $this->Link_ID->CommitTrans();
return $this->Link_ID->CompleteTrans();
}
/**
* Rollback the current transaction
*
* @return bool True if sucessful, False if fails
*/
function transaction_abort()
{
if (!$this->Link_ID && !$this->connect())
{
return False;
}
//return $this->Link_ID->RollbackTrans();
return $this->Link_ID->FailTrans();
}
/**
* Find the primary key of the last insertion on the current db connection
*
* @param string $table name of table the insert was performed on
* @param string $field the autoincrement primary key of the table
* @return int the id, -1 if fails
*/
function get_last_insert_id($table, $field)
{
if (!$this->Link_ID && !$this->connect())
{
return False;
}
$id = $this->Link_ID->PO_Insert_ID($table,$field); // simulates Insert_ID with "SELECT MAX($field) FROM $table" if not native availible
if ($id === False) // function not supported
{
echo "<p>db::get_last_insert_id(table='$table',field='$field') not yet implemented for db-type '$this->Type' OR no insert operation before</p>\n";
function_backtrace();
return -1;
}
return $id;
}
/**
* Lock a table
*
* @deprecated not used anymore as it costs to much performance, use transactions if needed
* @param string $table name of table to lock
* @param string $mode type of lock required (optional), default write
* @return bool True if sucessful, False if fails
*/
function lock($table, $mode='write')
{}
/**
* Unlock a table
*
* @deprecated not used anymore as it costs to much performance, use transactions if needed
* @return bool True if sucessful, False if fails
*/
function unlock()
{}
/**
* Get the number of rows affected by last update or delete
*
* @return int number of rows
*/
function affected_rows()
{
if (!$this->Link_ID && !$this->connect())
{
return False;
}
return $this->Link_ID->Affected_Rows();
}
/**
* Number of rows in current result set
*
* @return int number of rows
*/
function num_rows()
{
return $this->Query_ID ? $this->Query_ID->RecordCount() : False;
}
/**
* Number of fields in current row
*
* @return int number of fields
*/
function num_fields()
{
return $this->Query_ID ? $this->Query_ID->FieldCount() : False;
}
/**
* @deprecated use num_rows()
*/
function nf()
{
return $this->num_rows();
}
/**
* @deprecated use print num_rows()
*/
function np()
{
print $this->num_rows();
}
/**
* Return the value of a column
*
* @param string/integer $Name name of field or positional index starting from 0
* @param bool $strip_slashes string escape chars from field(optional), default false
* depricated param, as correctly quoted values dont need any stripslashes!
* @return string the field value
*/
function f($Name, $strip_slashes = False)
{
if ($strip_slashes)
{
return stripslashes($this->Record[$Name]);
}
return $this->Record[$Name];
}
/**
* Print the value of a field
*
* @param string $Name name of field to print
* @param bool $strip_slashes string escape chars from field(optional), default false
* depricated param, as correctly quoted values dont need any stripslashes!
*/
function p($Name, $strip_slashes = True)
{
print $this->f($Name, $strip_slashes);
}
/**
* Returns a query-result-row as an associative array (no numerical keys !!!)
*
* @param bool $do_next_record should next_record() be called or not (default not)
* @param string $strip='' string to strip of the column-name, default ''
* @return array/bool the associative array or False if no (more) result-row is availible
*/
function row($do_next_record=False,$strip='')
{
if ($do_next_record && !$this->next_record(ADODB_FETCH_ASSOC) || !is_array($this->Record))
{
return False;
}
$result = array();
foreach($this->Record as $column => $value)
{
if (!is_numeric($column))
{
if ($strip) $column = str_replace($strip,'',$column);
$result[$column] = $value;
}
}
return $result;
}
/**
* Error handler
*
* @param string $msg error message
* @param int $line line of calling method/function (optional)
* @param string $file file of calling method/function (optional)
*/
function halt($msg, $line = '', $file = '')
{
if ($this->Link_ID) // only if we have a link, else infinite loop
{
$this->Error = $this->Link_ID->ErrorMsg(); // need to be BEFORE unlock,
$this->Errno = $this->Link_ID->ErrorNo(); // else we get its error or none
$this->unlock(); /* Just in case there is a table currently locked */
}
if ($this->Halt_On_Error == "no")
{
return;
}
$this->haltmsg($msg);
if ($file)
{
printf("<br /><b>File:</b> %s",$file);
}
if ($line)
{
printf("<br /><b>Line:</b> %s",$line);
}
printf("<br /><b>Function:</b> %s</p>\n",function_backtrace(2));
if ($this->Halt_On_Error != "report")
{
echo "<p><b>Session halted.</b></p>";
if (is_object($GLOBALS['egw']->common))
{
$GLOBALS['egw']->common->egw_exit(True);
}
else // happens eg. in setup
{
exit();
}
}
}
function haltmsg($msg)
{
printf("<p><b>Database error:</b> %s<br>\n", $msg);
if (($this->Errno || $this->Error) && $this->Error != "()")
{
printf("<b>$this->Type Error</b>: %s (%s)<br>\n",$this->Errno,$this->Error);
}
}
/**
* Get description of a table
*
* Beside the column-name all other data depends on the db-type !!!
*
* @param string $table name of table to describe
* @param bool $full optional, default False summary information, True full information
* @return array table meta data
*/
function metadata($table='',$full=false)
{
if (!$this->Link_ID && !$this->connect())
{
return False;
}
$columns = $this->Link_ID->MetaColumns($table);
//$columns = $this->Link_ID->MetaColumnsSQL($table);
//echo "<b>metadata</b>('$table')=<pre>\n".print_r($columns,True)."</pre>\n";
$metadata = array();
$i = 0;
foreach($columns as $column)
{
// for backwards compatibilty (depreciated)
unset($flags);
if($column->auto_increment) $flags .= "auto_increment ";
if($column->primary_key) $flags .= "primary_key ";
if($column->binary) $flags .= "binary ";
// _debug_array($column);
$metadata[$i] = array(
'table' => $table,
'name' => $column->name,
'type' => $column->type,
'len' => $column->max_length,
'flags' => $flags, // for backwards compatibilty (depreciated) used by JiNN atm
'not_null' => $column->not_null,
'auto_increment' => $column->auto_increment,
'primary_key' => $column->primary_key,
'binary' => $column->binary,
'has_default' => $column->has_default,
'default' => $column->default_value,
);
$metadata[$i]['table'] = $table;
if ($full)
{
$metadata['meta'][$column->name] = $i;
}
++$i;
}
if ($full)
{
$metadata['num_fields'] = $i;
}
return $metadata;
}
/**
* Get a list of table names in the current database
*
* @return array list of the tables
*/
function table_names()
{
if (!$this->Link_ID) $this->connect();
if (!$this->Link_ID)
{
return False;
}
$result = array();
$tables = $this->Link_ID->MetaTables('TABLES');
if (is_array($tables))
{
foreach($tables as $table)
{
if ($this->capabilities['name_case'] == 'upper')
{
$table = strtolower($table);
}
$result[] = array(
'table_name' => $table,
'tablespace_name' => $this->Database,
'database' => $this->Database
);
}
}
return $result;
}
/**
* Return a list of indexes in current database
*
* @return array list of indexes
*/
function index_names()
{
$indices = array();
if ($this->Type != 'pgsql')
{
echo "<p>db::index_names() not yet implemented for db-type '$this->Type'</p>\n";
return $indices;
}
$this->query("SELECT relname FROM pg_class WHERE NOT relname ~ 'pg_.*' AND relkind ='i' ORDER BY relname");
while ($this->next_record())
{
$indices[] = array(
'index_name' => $this->f(0),
'tablespace_name' => $this->Database,
'database' => $this->Database,
);
}
return $indices;
}
/**
* Returns an array containing column names that are the primary keys of $tablename.
*
* @return array of columns
*/
function pkey_columns($tablename)
{
if (!$this->Link_ID && !$this->connect())
{
return False;
}
return $this->Link_ID->MetaPrimaryKeys($tablename);
}
/**
* Create a new database
*
* @param string $adminname name of database administrator user (optional)
* @param string $adminpasswd password for the database administrator user (optional)
* @param string $charset default charset for the database
*/
function create_database($adminname = '', $adminpasswd = '', $charset='')
{
$currentUser = $this->User;
$currentPassword = $this->Password;
$currentDatabase = $this->Database;
$sqls = array();
$set_charset = '';
switch ($this->Type)
{
case 'pgsql':
$meta_db = 'template1';
$sqls[] = "CREATE DATABASE $currentDatabase";
break;
case 'mysql':
$create = "CREATE DATABASE `$currentDatabase`";
if ($charset && isset($this->Link_ID->charset2mysql[$charset]) && (float) $this->ServerInfo['version'] >= 4.1)
{
$create .= ' DEFAULT CHARACTER SET '.$this->Link_ID->charset2mysql[$charset].';';
}
$sqls[] = $create;
$sqls[] = "GRANT ALL ON `$currentDatabase`.* TO $currentUser@localhost IDENTIFIED BY ".$this->quote($currentPassword);
$meta_db = 'mysql';
break;
default:
echo "<p>db::create_database(user='$adminname',\$pw) not yet implemented for DB-type '$this->Type'</p>\n";
break;
}
if ($adminname != '')
{
$this->User = $adminname;
$this->Password = $adminpasswd;
$this->Database = $meta_db;
}
$this->disconnect();
foreach($sqls as $sql)
{
$this->query($sql,__LINE__,__FILE__);
}
$this->disconnect();
$this->User = $currentUser;
$this->Password = $currentPassword;
$this->Database = $currentDatabase;
$this->connect();
}
/**
* concat a variable number of strings together, to be used in a query
*
* Example: $db->concat($db->quote('Hallo '),'username') would return
* for mysql "concat('Hallo ',username)" or "'Hallo ' || username" for postgres
* @param string $str1 already quoted stringliteral or column-name, variable number of arguments
* @return string to be used in a query
*/
function concat($str1)
{
$args = func_get_args();
if (!$this->Link_ID && !$this->connect())
{
return False;
}
return call_user_func_array(array(&$this->Link_ID,'concat'),$args);
}
/**
* Convert a unix timestamp stored as integer in the db into a db timestamp, like MySQL: FROM_UNIXTIME(ts)
*
* @param string $expr name of an integer column or integer expression
* @return string SQL expression of type timestamp
*/
function from_unixtime($expr)
{
switch($this->Type)
{
case 'mysql':
return "FROM_UNIXTIME($expr)";
case 'pgsql': // we use date(,0) as we store server-time
return "(timestamp '".date('Y-m-d H:i:s',0)."' + ($expr) * interval '1 sec')";
case 'mssql': // we use date(,0) as we store server-time
return "DATEADD(second,($expr),'".date('Y-m-d H:i:s',0)."')";
}
return false;
}
/**
* format a timestamp as string, like MySQL: DATE_FORMAT(ts)
*
* Please note: only a subset of the MySQL formats are implemented
*
* @param string $expr name of a timestamp column or timestamp expression
* @param string $format format specifier like '%Y-%m-%d %H:%i:%s' or '%V%X' ('%v%x') weeknumber & year with Sunday (Monday) as first day
* @return string SQL expression of type timestamp
*/
function date_format($expr,$format)
{
switch($this->Type)
{
case 'mysql':
return "DATE_FORMAT($expr,'$format')";
case 'pgsql':
$format = str_replace(
array('%Y', '%y','%m','%d','%H', '%h','%i','%s','%V','%v','%X', '%x'),
array('YYYY','YY','MM','DD','HH24','HH','MI','SS','IW','IW','YYYY','YYYY'),
$format);
return "TO_CHAR($expr,'$format')";
case 'mssql':
$from = $to = array();
foreach(array('%Y'=>'yyyy','%y'=>'yy','%m'=>'mm','%d'=>'dd','%H'=>'hh','%i'=>'mi','%s'=>'ss','%V'=>'wk','%v'=>'wk','%X'=>'yyyy','%x'=>'yyyy') as $f => $t)
{
$from[] = $f;
$to[] = "'+DATEPART($t,($expr))+'";
}
$from[] = "''+"; $to[] = '';
$from[] = "+''"; $to[] = '';
return str_replace($from,$to,$format);
}
return false;
}
/**
* Correctly Quote Identifiers like table- or colmnnames for use in SQL-statements
*
* This is mostly copy & paste from adodb's datadict class
* @param $name string
* @return string quoted string
*/
function name_quote($name = NULL)
{
if (!is_string($name)) {
return FALSE;
}
$name = trim($name);
if (!$this->Link_ID && !$this->connect())
{
return False;
}
$quote = $this->Link_ID->nameQuote;
// if name is of the form `name`, quote it
if ( preg_match('/^`(.+)`$/', $name, $matches) ) {
return $quote . $matches[1] . $quote;
}
// if name contains special characters, quote it
if ( preg_match('/\W/', $name) ) {
return $quote . $name . $quote;
}
return $name;
}
/**
* Escape values before sending them to the database - prevents SQL injunction and SQL errors ;-)
*
* Please note that the quote function already returns necessary quotes: quote('Hello') === "'Hello'".
* Int and Auto types are casted to int: quote('1','int') === 1, quote('','int') === 0, quote('Hello','int') === 0
*
* @param mixed $value the value to be escaped
* @param string/boolean $type=false string the type of the db-column, default False === varchar
* @param boolean $not_null=true is column NOT NULL, default true, else php null values are written as SQL NULL
* @param int $length=null length of the varchar column, to truncate it if the database requires it (eg. Postgres)
* @return string escaped sting
*/
function quote($value,$type=False,$not_null=true,$length=null)
{
if ($this->Debug) echo "<p>db::quote(".(is_null($value)?'NULL':"'$value'").",'$type','$not_null')</p>\n";
if (!$not_null && is_null($value)) // writing unset php-variables and those set to NULL now as SQL NULL
{
return 'NULL';
}
switch($type)
{
case 'int':
case 'auto':
return (int) $value;
case 'bool':
if ($this->Type == 'mysql') // maybe it's not longer necessary with mysql5
{
return $value ? 1 : 0;
}
return $value ? 'true' : 'false';
case 'float':
case 'decimal':
return (double) $value;
}
if (!$this->Link_ID && !$this->connect())
{
return False;
}
switch($type)
{
case 'blob':
switch ($this->Link_ID->blobEncodeType)
{
case 'C': // eg. postgres
return "'" . $this->Link_ID->BlobEncode($value) . "'";
case 'I':
return $this->Link_ID->BlobEncode($value);
}
break; // handled like strings
case 'date':
return $this->Link_ID->DBDate($value);
case 'timestamp':
return $this->Link_ID->DBTimeStamp($value);
}
if (!is_null($length) && strlen($value) > $length)
{
$value = substr($value,0,$length);
}
return $this->Link_ID->qstr($value);
}
/**
* Implodes an array of column-value pairs for the use in sql-querys.
* All data is run through quote (does either addslashes() or (int)) - prevents SQL injunction and SQL errors ;-).
*
* @author RalfBecker<at>outdoor-training.de
*
* @param string $glue in most cases this will be either ',' or ' AND ', depending you your query
* @param array $array column-name / value pairs, if the value is an array all its array-values will be quoted
* according to the type of the column, and the whole array with be formatted like (val1,val2,...)
* If $use_key == True, an ' IN ' instead a '=' is used. Good for category- or user-lists.
* If the key is numerical (no key given in the array-definition) the value is used as is, eg.
* array('visits=visits+1') gives just "visits=visits+1" (no quoting at all !!!)
* @param boolean/string $use_key If $use_key===True a "$key=" prefix each value (default), typically set to False
* or 'VALUES' for insert querys, on 'VALUES' "(key1,key2,...) VALUES (val1,val2,...)" is returned
* @param array/boolean $only if set to an array only colums which are set (as data !!!) are written
* typicaly used to form a WHERE-clause from the primary keys.
* If set to True, only columns from the colum_definitons are written.
* @param array/boolean $column_definitions this can be set to the column-definitions-array
* of your table ($tables_baseline[$table]['fd'] of the setup/tables_current.inc.php file).
* If its set, the column-type-data determinates if (int) or addslashes is used.
* @return string SQL
*/
function column_data_implode($glue,$array,$use_key=True,$only=False,$column_definitions=False)
{
if (!is_array($array)) // this allows to give an SQL-string for delete or update
{
return $array;
}
if (!$column_definitions)
{
$column_definitions = $this->column_definitions;
}
if ($this->Debug) echo "<p>db::column_data_implode('$glue',".print_r($array,True).",'$use_key',".print_r($only,True).",<pre>".print_r($column_definitions,True)."</pre>\n";
// do we need to truncate varchars to their max length (INSERT and UPDATE on Postgres)
$truncate_varchar = $glue == ',' && $this->capabilities['require_truncate_varchar'];
$keys = $values = array();
foreach($array as $key => $data)
{
if (is_int($key) || !$only || $only === True && isset($column_definitions[$key]) ||
is_array($only) && in_array($key,$only))
{
$keys[] = $this->name_quote($key);
if (!is_int($key) && is_array($column_definitions) && !isset($column_definitions[$key]))
{
// give a warning that we have no column-type
$this->halt("db::column_data_implode('$glue',".print_r($array,True).",'$use_key',".print_r($only,True).",<pre>".print_r($column_definitions,True)."</pre><b>nothing known about column '$key'!</b>");
}
$column_type = is_array($column_definitions) ? @$column_definitions[$key]['type'] : False;
$not_null = is_array($column_definitions) && isset($column_definitions[$key]['nullable']) ? !$column_definitions[$key]['nullable'] : false;
if ($truncate_varchar)
{
$maxlength = $column_definitions[$key]['type'] == 'varchar' ? $column_definitions[$key]['precision'] : null;
}
if (is_array($data))
{
$or_null = '';
foreach($data as $k => $v)
{
if (!$not_null && $use_key===True && is_null($v))
{
$or_null = $this->name_quote($key).' IS NULL)';
unset($data[$k]);
continue;
}
$data[$k] = $this->quote($v,$column_type,$not_null,$maxlength);
}
$values[] = ($or_null?'(':'').(!count($data) ? '' :
($use_key===True ? $this->name_quote($key).' IN ' : '') .
'('.implode(',',$data).')'.($or_null ? ' OR ' : '')).$or_null;
}
elseif (is_int($key) && $use_key===True)
{
$values[] = $data;
}
elseif ($glue != ',' && $use_key === True && !$not_null && is_null($data))
{
$values[] = $this->name_quote($key) .' IS NULL';
}
else
{
$values[] = ($use_key===True ? $this->name_quote($key) . '=' : '') . $this->quote($data,$column_type,$not_null,$maxlength);
}
}
}
return ($use_key==='VALUES' ? '('.implode(',',$keys).') VALUES (' : '').
implode($glue,$values) . ($use_key==='VALUES' ? ')' : '');
}
/**
* Sets the default column-definitions for use with column_data_implode()
*
* @author RalfBecker<at>outdoor-training.de
*
* @param array/boolean $column_definitions this can be set to the column-definitions-array
* of your table ($tables_baseline[$table]['fd'] of the setup/tables_current.inc.php file).
* If its set, the column-type-data determinates if (int) or addslashes is used.
*/
function set_column_definitions($column_definitions=False)
{
$this->column_definitions=$column_definitions;
}
/**
* Sets the application in which the db-class looks for table-defintions
*
* Used by table_definitions, insert, update, select, expression and delete. If the app is not set via set_app,
* it need to be set for these functions on every call
*
* @param string $app the app-name
*/
function set_app($app)
{
$this->app = $app;
}
/**
* reads the table-definitions from the app's setup/tables_current.inc.php file
*
* The already read table-definitions are shared between all db-instances via $GLOBALS['egw_info']['apps'][$app]['table_defs']
*
* @author RalfBecker<at>outdoor-training.de
*
* @param bool/string $app name of the app or default False to use the app set by db::set_app or the current app,
* true to search the already loaded table-definitions for $table
* @param bool/string $table if set return only defintions of that table, else return all defintions
* @return mixed array with table-defintions or False if file not found
*/
function get_table_definitions($app=False,$table=False)
{
if ($app === true && $table && isset($GLOBALS['egw_info']['apps']))
{
foreach($GLOBALS['egw_info']['apps'] as $app => $app_data)
{
if (isset($data['table_defs'][$table]))
{
return $data['table_defs'][$table];
}
}
$app = false;
}
if (!$app)
{
$app = $this->app ? $this->app : $GLOBALS['egw_info']['flags']['currentapp'];
}
if (isset($GLOBALS['egw_info']['apps'])) // dont set it, if it does not exist!!!
{
$this->app_data = &$GLOBALS['egw_info']['apps'][$app];
}
// this happens during the eGW startup or in setup
else
{
$this->app_data =& $this->all_app_data[$app];
}
if (!isset($this->app_data['table_defs']))
{
$tables_current = EGW_INCLUDE_ROOT . "/$app/setup/tables_current.inc.php";
if (!@file_exists($tables_current))
{
return $this->app_data['table_defs'] = False;
}
include($tables_current);
$this->app_data['table_defs'] =& $phpgw_baseline;
unset($phpgw_baseline);
}
if ($table && (!$this->app_data['table_defs'] || !isset($this->app_data['table_defs'][$table])))
{
return False;
}
return $table ? $this->app_data['table_defs'][$table] : $this->app_data['table_defs'];
}
/**
* Insert a row of data into a table or updates it if $where is given, all data is quoted according to it's type
*
* @author RalfBecker<at>outdoor-training.de
*
* @param string $table name of the table
* @param array $data with column-name / value pairs
* @param mixed $where string with where clause or array with column-name / values pairs to check if a row with that keys already exists, or false for an unconditional insert
* if the row exists db::update is called else a new row with $date merged with $where gets inserted (data has precedence)
* @param int $line line-number to pass to query
* @param string $file file-name to pass to query
* @param string/boolean $app string with name of app or False to use the current-app
* @param bool $use_prepared_statement use a prepared statement
* @param array/bool $table_def use this table definition. If False, the table definition will be read from tables_baseline
* @return ADORecordSet or false, if the query fails
*/
function insert($table,$data,$where,$line,$file,$app=False,$use_prepared_statement=false,$table_def=False)
{
if ($this->Debug) echo "<p>db::insert('$table',".print_r($data,True).",".print_r($where,True).",$line,$file,'$app')</p>\n";
if (!$table_def) $table_def = $this->get_table_definitions($app,$table);
$sql_append = '';
$cmd = 'INSERT';
if (is_array($where) && count($where))
{
switch($this->Type)
{
case 'sapdb': case 'maxdb':
$sql_append = ' UPDATE DUPLICATES';
break;
case 'mysql':
// use replace if primary keys are included
if (count(array_intersect(array_keys($where),(array)$table_def['pk'])) == count($table_def['pk']))
{
$cmd = 'REPLACE';
break;
}
// fall through !!!
default:
$this->select($table,'count(*)',$where,$line,$file);
if ($this->next_record() && $this->f(0))
{
return !!$this->update($table,$data,$where,$line,$file,$app);
}
break;
}
// the checked values need to be inserted too, value in data has precedence, also cant insert sql strings (numerical id)
foreach($where as $column => $value)
{
if (!is_numeric($column) && !isset($data[$column]))
{
$data[$column] = $value;
}
}
}
$inputarr = false;
if ($use_prepared_statement && $this->Link_ID->_bindInputArray) // eg. MaxDB
{
$this->Link_ID->Param(false); // reset param-counter
$cols = array_keys($data);
foreach($cols as $k => $col)
{
if (!isset($table_def['fd'][$col])) // ignore columns not in this table
{
unset($cols[$k]);
continue;
}
$params[] = $this->Link_ID->Param($col);
}
$sql = "$cmd INTO $table (".implode(',',$cols).') VALUES ('.implode(',',$params).')'.$sql_append;
// check if we already prepared that statement
if (!isset($this->prepared_sql[$sql]))
{
$this->prepared_sql[$sql] = $this->Link_ID->Prepare($sql);
}
$sql = $this->prepared_sql[$sql];
$inputarr = &$data;
}
else
{
$sql = "$cmd INTO $table ".$this->column_data_implode(',',$data,'VALUES',true,$table_def['fd']).$sql_append;
}
if ($this->Debug) echo "<p>db::insert('$table',".print_r($data,True).",".print_r($where,True).",$line,$file,'$app') sql='$sql'</p>\n";
return $this->query($sql,$line,$file,0,-1,$inputarr);
}
/**
* Updates the data of one or more rows in a table, all data is quoted according to it's type
*
* @author RalfBecker<at>outdoor-training.de
*
* @param string $table name of the table
* @param array $data with column-name / value pairs
* @param array $where column-name / values pairs and'ed together for the where clause
* @param int $line line-number to pass to query
* @param string $file file-name to pass to query
* @param string/boolean $app string with name of app or False to use the current-app
* @param bool $use_prepared_statement use a prepared statement
* @param array/bool $table_def use this table definition. If False, the table definition will be read from tables_baseline
* @return ADORecordSet or false, if the query fails
*/
function update($table,$data,$where,$line,$file,$app=False,$use_prepared_statement=false,$table_def=False)
{
if ($this->Debug) echo "<p>db::update('$table',".print_r($data,true).','.print_r($where,true).",$line,$file,'$app')</p>\n";
if (!$table_def) $table_def = $this->get_table_definitions($app,$table);
$blobs2update = array();
// SapDB/MaxDB cant update LONG columns / blob's: if a blob-column is included in the update we remember it in $blobs2update
// and remove it from $data
switch ($this->Type)
{
case 'sapdb':
case 'maxdb':
if ($use_prepared_statement) break;
// check if data contains any LONG columns
foreach($data as $col => $val)
{
switch ($table_def['fd'][$col]['type'])
{
case 'text':
case 'longtext':
case 'blob':
$blobs2update[$col] = &$data[$col];
unset($data[$col]);
break;
}
}
break;
}
$where = $this->column_data_implode(' AND ',$where,True,true,$table_def['fd']);
if (count($data))
{
$inputarr = false;
if ($use_prepared_statement && $this->Link_ID->_bindInputArray) // eg. MaxDB
{
$this->Link_ID->Param(false); // reset param-counter
foreach($data as $col => $val)
{
if (!isset($table_def['fd'][$col])) continue; // ignore columns not in this table
$params[] = $this->name_quote($col).'='.$this->Link_ID->Param($col);
}
$sql = "UPDATE $table SET ".implode(',',$params).' WHERE '.$where;
// check if we already prepared that statement
if (!isset($this->prepared_sql[$sql]))
{
$this->prepared_sql[$sql] = $this->Link_ID->Prepare($sql);
}
$sql = $this->prepared_sql[$sql];
$inputarr = &$data;
}
else
{
$sql = "UPDATE $table SET ".
$this->column_data_implode(',',$data,True,true,$table_def['fd']).' WHERE '.$where;
}
$ret = $this->query($sql,$line,$file,0,-1,$inputarr);
if ($this->Debug) echo "<p>db::query('$sql',$line,$file) = '$ret'</p>\n";
}
// if we have any blobs to update, we do so now
if (($ret || !count($data)) && count($blobs2update))
{
foreach($blobs2update as $col => $val)
{
$ret = $this->Link_ID->UpdateBlob($table,$col,$val,$where,$table_def['fd'][$col]['type'] == 'blob' ? 'BLOB' : 'CLOB');
if ($this->Debug) echo "<p>adodb::UpdateBlob('$table','$col','$val','$where') = '$ret'</p>\n";
if (!$ret) $this->halt("Error in UpdateBlob($table,$col,\$val,$where)",$line,$file);
}
}
return $ret;
}
/**
* Deletes one or more rows in table, all data is quoted according to it's type
*
* @author RalfBecker<at>outdoor-training.de
*
* @param string $table name of the table
* @param array $where column-name / values pairs and'ed together for the where clause
* @param int $line line-number to pass to query
* @param string $file file-name to pass to query
* @param string/boolean $app string with name of app or False to use the current-app
* @param array/bool $table_def use this table definition. If False, the table definition will be read from tables_baseline
* @return ADORecordSet or false, if the query fails
*/
function delete($table,$where,$line,$file,$app=False,$table_def=False)
{
if (!$table_def) $table_def = $this->get_table_definitions($app,$table);
$sql = "DELETE FROM $table WHERE ".
$this->column_data_implode(' AND ',$where,True,False,$table_def['fd']);
return $this->query($sql,$line,$file);
}
/**
* Formats and quotes a sql expression to be used eg. as where-clause
*
* The function has a variable number of arguments, from which the expession gets constructed
* eg. db::expression('my_table','(',array('name'=>"test'ed",'lang'=>'en'),') OR ',array('owner'=>array('',4,10)))
* gives "(name='test\'ed' AND lang='en') OR 'owner' IN (0,4,5,6,10)" if name,lang are strings and owner is an integer
*
* @param string/array $table_def table-name or definition array
* @param mixed $args variable number of arguments of the following types:
* string: get's as is into the result
* array: column-name / value pairs: the value gets quoted according to the type of the column and prefixed
* with column-name=, multiple pairs are AND'ed together, see db::column_data_implode
* bool: If False or is_null($arg): the next 2 (!) arguments gets ignored
*
* Please note: As the function has a variable number of arguments, you CAN NOT add further parameters !!!
*
* @return string the expression generated from the arguments
*/
function expression($table_def,$args)
{
if (!is_array($table_def)) $table_def = $this->get_table_definitions('',$table_def);
$sql = '';
$ignore_next = 0;
foreach(func_get_args() as $n => $arg)
{
if ($n < 1) continue; // table-name
if ($ignore_next)
{
--$ignore_next;
continue;
}
if (is_null($arg)) $arg = False;
switch(gettype($arg))
{
case 'string':
$sql .= $arg;
break;
case 'boolean':
$ignore_next += !$arg ? 2 : 0;
break;
case 'array':
$sql .= $this->column_data_implode(' AND ',$arg,True,False,$table_def['fd']);
break;
}
}
if ($this->Debug) echo "<p>db::expression($table,<pre>".print_r(func_get_args(),True)."</pre>) ='$sql'</p>\n";
return $sql;
}
/**
* Selects one or more rows in table depending on where, all data is quoted according to it's type
*
* @author RalfBecker<at>outdoor-training.de
*
* @param string $table name of the table
* @param array/string $cols string or array of column-names / select-expressions
* @param array/string $where string or array with column-name / values pairs AND'ed together for the where clause
* @param int $line line-number to pass to query
* @param string $file file-name to pass to query
* @param int/bool $offset offset for a limited query or False (default)
* @param string $append string to append to the end of the query, eg. ORDER BY ...
* @param string/boolean $app string with name of app or False to use the current-app
* @param int $num_rows number of rows to return if offset set, default 0 = use default in user prefs
* @param string $join=null sql to do a join, added as is after the table-name, eg. ", table2 WHERE x=y" or
* "LEFT JOIN table2 ON (x=y)", Note: there's no quoting done on $join!
* @param array/bool $table_def use this table definition. If False, the table definition will be read from tables_baseline
* @return ADORecordSet or false, if the query fails
*/
function select($table,$cols,$where,$line,$file,$offset=False,$append='',$app=False,$num_rows=0,$join='',$table_def=False)
{
if ($this->Debug) echo "<p>db::select('$table',".print_r($cols,True).",".print_r($where,True).",$line,$file,$offset,'$app',$num_rows,'$join')</p>\n";
if (!$table_def) $table_def = $this->get_table_definitions($app,$table);
if (is_array($cols))
{
$cols = implode(',',$cols);
}
if (is_array($where))
{
$where = $this->column_data_implode(' AND ',$where,True,False,$table_def['fd']);
}
$sql = "SELECT $cols FROM $table $join";
// if we have a where clause, we need to add it together with the WHERE statement, if thats not in the join
if ($where) $sql .= (strpos($join,"WHERE")!==false) ? ' AND ('.$where.')' : ' WHERE '.$where;
if ($append) $sql .= ' '.$append;
if ($this->Debug) echo "<p>sql='$sql'</p>";
if ($line === false && $file === false) // call by union, to return the sql rather then run the query
{
return $sql;
}
return $this->query($sql,$line,$file,$offset,$offset===False ? -1 : (int)$num_rows);
}
/**
* Does a union over multiple selects
*
* @author RalfBecker<at>outdoor-training.de
*
* @param array $selects array of selects, each select is an array with the possible keys/parameters: table, cols, where, append, app, join, table_def
* For further info about parameters see the definition of the select function, beside table, cols and where all other params are optional
* @param int $line line-number to pass to query
* @param string $file file-name to pass to query
* @param string $order_by ORDER BY statement for the union
* @param int/bool $offset offset for a limited query or False (default)
* @param int $num_rows number of rows to return if offset set, default 0 = use default in user prefs
* @return ADORecordSet or false, if the query fails
*/
function union($selects,$line,$file,$order_by='',$offset=false,$num_rows=0)
{
if ($this->Debug) echo "<p>db::union(".print_r($selects,True).",$line,$file,$order_by,$offset,$num_rows)</p>\n";
$sql = array();
foreach($selects as $select)
{
$sql[] = call_user_func_array(array($this,'select'),array(
$select['table'],
$select['cols'],
$select['where'],
false, // line
false, // file
false, // offset
$select['append'],
$select['app'],
0, // num_rows,
$select['join'],
$select['table_def'],
));
}
$sql = count($sql) > 1 ? '(' . implode(")\nUNION\n(",$sql).')' : $sql[0];
if ($order_by) $sql .= (!stristr($order_by,'ORDER BY') ? "\nORDER BY " : '').$order_by;
if ($this->Debug) echo "<p>sql='$sql'</p>";
return $this->query($sql,$line,$file,$offset,$offset===False ? -1 : (int)$num_rows);
}
}
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