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- added functions to abstract from_unixtime and date_format for DB-types other then mysql

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- db::select adds ORDER BY to append param, only if its not already in the append param
This commit is contained in:
Ralf Becker 2006-04-05 15:14:59 +00:00
parent 3040a3bef6
commit 00060f9551
1 changed files with 60 additions and 1 deletions
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61
phpgwapi/inc/class.egw_db.inc.php
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@ -1031,6 +1031,65 @@
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
*
@ -1603,7 +1662,7 @@
}
$sql = count($sql) > 1 ? '(' . implode(")\nUNION\n(",$sql).')' : $sql[0];
if ($order_by) $sql .= "\nORDER BY ".$order_by;
if ($order_by) $sql .= (!stristr($order_by,'ORDER BY') ? "\nORDER BY " : '').$order_by;
if ($this->Debug) echo "<p>sql='$sql'</p>";