PMA\libraries\DatabaseInterface::getColumns PHP Метод

    public function getColumns($database, $table, $column = null, $full = false, $link = null)
    {
        $sql = $this->getColumnsSql($database, $table, $column, $full);
        $fields = $this->fetchResult($sql, 'Field', null, $link);
        if (!is_array($fields) || count($fields) == 0) {
            return array();
        }
        // Check if column is a part of multiple-column index and set its 'Key'.
        $indexes = Index::getFromTable($table, $database);
        foreach ($fields as $field => $field_data) {
            if (!empty($field_data['Key'])) {
                continue;
            }
            foreach ($indexes as $index) {
                /** @var Index $index */
                if (!$index->hasColumn($field)) {
                    continue;
                }
                $index_columns = $index->getColumns();
                if ($index_columns[$field]->getSeqInIndex() > 1) {
                    if ($index->isUnique()) {
                        $fields[$field]['Key'] = 'UNI';
                    } else {
                        $fields[$field]['Key'] = 'MUL';
                    }
                }
            }
        }
        return $column != null ? array_shift($fields) : $fields;
    }