flowable DDL中的bug

摘要：flowable6.1.2（包含）以下的DDL中有一些sql问题。具体的ddl文件以及错误内容如下：

注意：-表示删除的，+表示新增的。

org/flowable/db/upgrade/flowable.h2.upgradestep.6120.to.6200.history.sql文件

-alter table ACT_RU_EXECUTION add column CALLBACK_ID_ varchar(255);

-alter table ACT_RU_EXECUTION add column CALLBACK_TYPE_ varchar(255);

+alter table ACT_HI_PROCINST add column CALLBACK_ID_ varchar(255);

+alter table ACT_HI_PROCINST add column CALLBACK_TYPE_ varchar(255);

org/flowable/db/upgrade/flowable.mssql.upgradestep.6120.to.6200.history.sql：

-alter table ACT_RU_EXECUTION add CALLBACK_ID_ nvarchar(255);

-alter table ACT_RU_EXECUTION add CALLBACK_TYPE_ nvarchar(255);

+alter table ACT_HI_PROCINST add column CALLBACK_ID_ nvarchar(255);

+alter table ACT_HI_PROCINST add column CALLBACK_TYPE_ nvarchar(255);

org/flowable/db/upgrade/flowable.mysql.upgradestep.6120.to.6200.history.sql：

-alter table ACT_RU_EXECUTION add column CALLBACK_ID_ varchar(255);

-alter table ACT_RU_EXECUTION add column CALLBACK_TYPE_ varchar(255);

+alter table ACT_HI_VARINST add column CALLBACK_ID_ varchar(255);

+alter table ACT_HI_VARINST add column CALLBACK_TYPE_ varchar(255);

org/flowable/db/upgrade/flowable.h2.upgradestep.6120.to.6200.history.sql

-alter table ACT_RU_EXECUTION add column CALLBACK_ID_ varchar(255);

-alter table ACT_RU_EXECUTION add column CALLBACK_TYPE_ varchar(255);

+alter table ACT_HI_PROCINST add column CALLBACK_ID_ varchar(255);

+alter table ACT_HI_PROCINST add column CALLBACK_TYPE_ varchar(255);

org/flowable/db/upgrade/flowable.mssql.upgradestep.6120.to.6200.history.sql

-alter table ACT_RU_EXECUTION add CALLBACK_ID_ nvarchar(255);

-alter table ACT_RU_EXECUTION add CALLBACK_TYPE_ nvarchar(255);

+alter table ACT_HI_PROCINST add column CALLBACK_ID_ nvarchar(255);

+alter table ACT_HI_PROCINST add column CALLBACK_TYPE_ nvarchar(255);

org/flowable/db/upgrade/flowable.mysql.upgradestep.6120.to.6200.history.sql

-alter table ACT_RU_EXECUTION add column CALLBACK_ID_ varchar(255);

-alter table ACT_RU_EXECUTION add column CALLBACK_TYPE_ varchar(255);

+alter table ACT_HI_VARINST add column CALLBACK_ID_ varchar(255);

+alter table ACT_HI_VARINST add column CALLBACK_TYPE_ varchar(255);