anchor.diff:      : SET LP_ LOCK_ESCALATION EQ_ (AUTO | TABLE | DISABLE) RP_
       | MEMORY_OPTIMIZED EQ_ ON
       | DURABILITY EQ_ (SCHEMA_ONLY | SCHEMA_AND_DATA) 
  -    | SYSTEM_VERSIONING EQ_ ON (LP_ HISTORY_TABLE EQ_ tableName (COMMA_ DATA_CONSISTENCY_CHECK EQ_ (ON | OFF))? RP_)?
  +    | SYSTEM_VERSIONING EQ_ ON onHistoryTableClause?
  +    ;
  +
  +onHistoryTableClause
  +    : LP_ HISTORY_TABLE EQ_ tableName (COMMA_ DATA_CONSISTENCY_CHECK EQ_ (ON | OFF))? RP_
       ;
   
   tableExistClause_
  
positive.code:     ;
  
  alterCheckConstraint 
      : WITH? (CHECK | NOCHECK) CONSTRAINT (ALL | (ignoredIdentifier_ (COMMA_ ignoredIdentifier_)*))
      ;
  
  alterTrigger 
      : (ENABLE| DISABLE) TRIGGER (ALL | (ignoredIdentifier_ (COMMA_ ignoredIdentifier_)*))
      ;
  
  alterSwitch
  