bpmc/ebpm-process-code/lib/bpmc-engine-5.16.4/org/activiti/db/upgrade/activiti.postgres.upgradestep.53.to.54.engine.sql

alter table ACT_RU_TASK 
add OWNER_ varchar(64);

alter table ACT_RU_TASK 
add DELEGATION_ varchar(64);

alter table ACT_RU_TASK 
add DUE_DATE_ timestamp;