An error is reported when installing dataspherestudio doc: invalid default value for 'update_ time‘

0. Complete error report ：

install DataSphereStudio-Doc, In the installation Linkiss when , Report errors

ERROR 1067 (42000) at line 32 in file: '/usr/local/dss_linkis/linkis/db/linkis_ddl.sql': Invalid default value for 'update_time'
Failed to  + source linkis_ddl.sql
***********Error: failed to  + install Linkis

1. analysis

Check the details sql Found to be datetime The problem of

DROP TABLE IF EXISTS `linkis_ps_configuration_config_value`;
CREATE TABLE linkis_ps_configuration_config_value(
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `config_key_id` bigint(20),
  `config_value` varchar(200),
  `config_label_id`int(20),
  `update_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE INDEX(`config_key_id`, `config_label_id`)
)ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin;

DataSphere Studio Requirements are mentioned in the document mysql 5.5+

• I found one mysql 5.5.47 test ,[Err] 1067 - Invalid default value for ‘update_time’
• I have another one mysql 5.7 Run the above sql normal

It seems that it is mysql Version problem , You have to upgrade mysql Version can solve ！

3. reason

Look up
MySQL5.6 Official documents
Find out ：

As of MySQL 5.6.5, TIMESTAMP and DATETIME columns can be automatically initializated and updated to the current date and time (that is, the current timestamp). Before 5.6.5, this is true only for TIMESTAMP, and for at most one TIMESTAMP column per table

That is to say MySQL5.6 After version DATETIME The type field can be set with default value and auto update , The previous only TIMESTAMP.
Remove the default value to run normally