Issue #3312090 by fathima.asmat, neffets: Update_N hook fail for field type...

        $database = \Drupal::database();

        $existing_data = [];

        foreach ($tables as $table) {

          // Create any new fields from the field schema

          // if they don't exist in the database table.

          $field_schema = $field_storage_definition->getSchema();

          $columns = $table_mapping->getColumnNames($field_name);

          if (!empty($field_schema['columns'])) {

            foreach ($field_schema['columns'] as $column_name => $column_data) {

              $table_exists = $schema->tableExists($table);

              if ($table_exists) {

                $field_exists = $schema->fieldExists($table, $columns[$column_name]);

                if ($field_exists === FALSE) {

                  $schema->addField($table, $columns[$column_name], $column_data);

                }

              }

            }

            // Caches have to be cleared first to ensure

            // new fields are detected in the code.

            drupal_flush_all_caches();

          }

          // Get the old data.

          $existing_data[$table] = $database->select($table)

            ->fields($table)