DB2数据库不识别DEFINITION ONLY关键字

最近测试项目DB2数据库适配，发现druid在解析sql时不识别DEFINITION ONLY关键字，导致如下错误。我需要执行的sql是`CREATE TABLE TRACE_LOG_BK AS (SELECT * FROM TRACE_LOG) DEFINITION ONLY`
我使用的druid版本为：1.1.10（druid-spring-boot-starter），切换为最新版本1.2.8，还是有此问题

Reproduce the parser failure with `CREATE TABLE TRACE_LOG_BK AS (SELECT * FROM TRACE_LOG) DEFINITION ONLY` using the reported Druid versions, then trace how this DB2 CREATE TABLE statement is parsed. Done means the statement parses successfully without the reported error while preserving existing behavior for related SQL.

Written by the indexing model from the issue text.