addSql('ALTER TABLE log_entry ADD error_code VARCHAR(12) DEFAULT NULL'); $this->addSql('CREATE INDEX IDX_LOG_ENTRY_ERROR_CODE ON log_entry (error_code)'); } public function down(Schema $schema): void { $this->addSql('DROP INDEX IDX_LOG_ENTRY_ERROR_CODE ON log_entry'); $this->addSql('ALTER TABLE log_entry DROP error_code'); } }