Horde_Rdo_Query::_where PHP Method

    protected function _where(&$sql, &$bindParams)
    {
        $clauses = array();
        foreach ($this->tests as $test) {
            if (strpos($test['field'], '@') !== false) {
                list($rel, $field) = explode('@', $test['field']);
                if (!isset($this->relationships[$rel])) {
                    continue;
                }
                $clause = $this->relationships[$rel]['tableAlias'] . '.' . $field . ' ' . $test['test'];
            } else {
                $clause = $this->mapper->table . '.' . $this->mapper->adapter->quoteColumnName($test['field']) . ' ' . $test['test'];
            }
            if ($test['value'] instanceof Horde_Rdo_Query_Literal) {
                $clauses[] = $clause . ' ' . (string) $test['value'];
            } else {
                if (($test['test'] == 'IN' || $test['test'] == 'NOT IN') && is_array($test['value'])) {
                    $clauses[] = $clause . '(?' . str_repeat(',?', count($test['value']) - 1) . ')';
                    $bindParams = array_merge($bindParams, array_values($test['value']));
                } else {
                    $clauses[] = $clause . ' ?';
                    $bindParams[] = $test['value'];
                }
            }
        }
        if ($clauses) {
            $sql .= ' WHERE ' . implode(' ' . $this->conjunction . ' ', $clauses);
        }
    }