Hello,
There is no index on TASK_ID_ column on ACT_RU_VARIABLE table, is there any special reason?
I suggest creating index ACT_IDX_VAR_TASK on ACT_RU_VARIABLE..
create index ACTIVITI.ACT_IDX_VAR_TASK on ACTIVITI.ACT_RU_VARIABLE (TASK_ID_)
What do you think?
Thank you.