Chris@12: <?php
Chris@12: // @codingStandardsIgnoreFile
Chris@12: 
Chris@12: use Drupal\Core\Database\Database;
Chris@12: 
Chris@12: $connection = Database::getConnection();
Chris@12: 
Chris@12: // Simulate an entity type that had previously set an initial key schema for a
Chris@12: // field.
Chris@12: $schema = $connection->select('key_value')
Chris@12:   ->fields('key_value', ['value'])
Chris@12:   ->condition('collection', 'entity.storage_schema.sql')
Chris@12:   ->condition('name', 'entity_test_update.field_schema_data.name')
Chris@12:   ->execute()
Chris@12:   ->fetchField();
Chris@12: 
Chris@12: $schema = unserialize($schema);
Chris@12: $schema['entity_test_update']['fields']['name']['initial'] = 'test';
Chris@12: 
Chris@12: $connection->update('key_value')
Chris@12:   ->fields(['value' => serialize($schema)])
Chris@12:   ->condition('collection', 'entity.storage_schema.sql')
Chris@12:   ->condition('name', 'entity_test_update.field_schema_data.name')
Chris@12:   ->execute();