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[ticket/10942] Add sql_conditional to dbal

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PHPBB3-10942
This commit is contained in:
Joas Schilling 2012-06-20 01:50:00 +02:00
parent 419d6cd035
commit 71374078b9
1 changed files with 17 additions and 0 deletions
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17
phpBB/includes/db/dbal.php
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@ -283,6 +283,23 @@ class dbal
return $this->_sql_like_expression('LIKE \'' . $this->sql_escape($expression) . '\'');
}
/**
* Build a conditional SQL query
*
* @param string $condition The condition which must be true, to use action_true rather then action_else
* @param string $action_true SQL statement that is used, if the condition is true
* @param string $action_else SQL statement that is used, if the condition is false, optional
* @return string CASE expression including the condition and statements
*/
function sql_conditional($condition, $action_true, $action_false = false)
{
$sql_condition = 'CASE WHEN ' . $condition;
$sql_condition .= ' THEN ' . $action_true;
$sql_condition .= ($action_false !== false) ? ' ELSE ' . $action_false : '';
$sql_condition .= ' END';
return $sql_condition;
}
/**
* Returns whether results of a query need to be buffered to run a transaction while iterating over them.
*