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helper function to construct union-query-columns for calendar_integration

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This commit is contained in:
Ralf Becker 2010-04-23 06:52:48 +00:00
parent ee18b0acac
commit 74ccf7501d
1 changed files with 80 additions and 5 deletions
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85
calendar/inc/class.calendar_so.inc.php
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@ -454,7 +454,7 @@ class calendar_so
'app' => 'calendar',
'append'=> $append,
);
// we check if there are parts to use for the construction of our UNION query,
// we check if there are parts to use for the construction of our UNION query,
// as replace the OR by construction of a suitable UNION for performance reasons
if (!empty($owner_or)||!empty($user_or))
{
@ -463,7 +463,7 @@ class calendar_so
// if the query is to be filtered by owner OR user we need 4 selects for the union
//_debug_array($owner_or);
$selects = array();
foreach(array_keys($user_or) as $key)
foreach(array_keys($user_or) as $key)
{
$selects[] = $select;
$selects[count($selects)-1]['where'][] = $user_or[$key];
@ -505,16 +505,16 @@ class calendar_so
{
// we only select cal_table.cal_id (and not cal_table.*) to be able to use DISTINCT (eg. MsSQL does not allow it for text-columns)
$countSelects = count($selects);
foreach(array_keys($selects) as $key)
foreach(array_keys($selects) as $key)
{
$selects[$key]['cols'] = "DISTINCT $this->repeats_table.*,$this->cal_table.cal_id,cal_start,cal_end,cal_recur_date";
$selects[$key]['cols'] = "DISTINCT $this->repeats_table.*,$this->cal_table.cal_id,cal_start,cal_end,cal_recur_date";
//$selects[0]['cols'] = $selects[1]['cols'] = "DISTINCT $this->repeats_table.*,$this->cal_table.cal_id,cal_start,cal_end,cal_recur_date";
}
if (is_null($_cols)) self::get_union_selects($selects,$start,$end,$users,$cat_id,$filter,$query);
$this->total = $this->db->union($selects,__LINE__,__FILE__)->NumRows();
$i = 0;
foreach(array_keys($selects) as $key)
foreach(array_keys($selects) as $key)
{
if ($i >= $countSelects) continue;
$i ++;
@ -701,6 +701,81 @@ class calendar_so
return self::$integration_data;
}
/**
* Return union cols constructed from application cols and required cols
*
* Every col not supplied in $app_cols get returned as NULL.
*
* @param array $app_cols required name => own name pairs
* @param string|array $required array or comma separated column names or table.*
* @param string $required_app='calendar'
* @return string cols for union query to match ones supplied in $required
*/
public static function union_cols(array $app_cols,$required,$required_app='calendar')
{
// remove evtl. used DISTINCT, we currently dont need it
if (($distinct = substr($required,0,9) == 'DISTINCT '))
{
$required = substr($required,9);
}
$return_cols = array();
foreach(is_array($required) ? $required : explode(',',$required) as $cols)
{
if (substr($cols,-2) == '.*')
{
$cols = self::get_columns($required_app,substr($cols,0,-2));
}
elseif (strpos($cols,' AS ') !== false)
{
list(,$cols) = explode(' AS ',$cols);
}
foreach((array)$cols as $col)
{
if (substr($col,0,7) == 'egw_cal') // remove table name
{
$col = preg_replace('/^egw_cal[a-z_]*\.','',$col);
}
if (isset($app_cols[$col]))
{
$return_cols[] = $app_cols[$col];
}
else
{
$return_cols[] = 'NULL';
}
}
}
return implode(',',$return_cols);
}
/**
* Get columns of given table, taking into account historically different column order of egw_cal table
*
* @param string $app
* @param string $table
* @return array of column names
*/
static private function get_columns($app,$table)
{
if ($table != 'egw_cal')
{
$table_def = $GLOBALS['egw']->db->get_table_definitions($app,$table);
$cols = array_keys($table_def['fd']);
}
else
{
// special handling for egw_cal, as old databases have a different column order!!!
$cols =& egw_cache::getSession(__CLASS__,$table);
if (is_null($cols))
{
$meta = $GLOBALS['egw']->db->metadata($table,true);
$cols = array_keys($meta['meta']);
}
}
return $cols;
}
/**
* Checks for conflicts
*/