AlterQuery  issue_46128 (children 3)
 ExpressionList (children 1)
  AlterCommand UPDATE (children 2)
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier id
     Literal UInt64_1
   ExpressionList (children 1)
    Assignment a (children 1)
     Identifier b
 Identifier issue_46128
 Set
