Merge branch 'master' of github.com:Activiti/Activiti

modules/activiti-engine/src/main/resources/org/activiti/db/create/activiti.db2.create.history.sql

@@ -13,10 +13,11 @@ create table ACT_HI_PROCINST (
 	  UNI_BUSINESS_KEY varchar (255)  not null  generated always as (case when "BUSINESS_KEY_" is null then "ID_" else "BUSINESS_KEY_" end),
 	  UNI_PROC_DEF_ID varchar (64)  not null  generated always as (case when "PROC_DEF_ID_" is null then "ID_" else "PROC_DEF_ID_" end),
     DELETE_REASON_ varchar(4000),
-    primary key (ID_),
-    unique (PROC_INST_ID_)
+    primary key (ID_)
 );
 
+alter table ACT_HI_PROCINST add constraint PROC_INST_ID_ unique(PROC_INST_ID_);
+
 create table ACT_HI_ACTINST (
     ID_ varchar(64) not null,
     PROC_DEF_ID_ varchar(64) not null,
@@ -129,4 +130,4 @@ create index ACT_IDX_HI_DETAIL_NAME on ACT_HI_DETAIL(NAME_);
 create index ACT_IDX_HI_DETAIL_TASK_ID on ACT_HI_DETAIL(TASK_ID_);
 create index ACT_IDX_HI_PROCVAR_PROC_INST on ACT_HI_VARINST(PROC_INST_ID_);
 create index ACT_IDX_HI_PROCVAR_NAME_TYPE on ACT_HI_VARINST(NAME_, VAR_TYPE_);
-create index ACT_IDX_HI_ACT_INST_PROCINST on ACT_HI_ACTINST(PROC_INST_ID_, ACT_ID_);
\ No newline at end of file
+create index ACT_IDX_HI_ACT_INST_PROCINST on ACT_HI_ACTINST(PROC_INST_ID_, ACT_ID_);