InsertQuery   (children 3)
 Function cluster (children 1)
  ExpressionList (children 4)
   Literal \'test_cluster_two_shards\'
   Function currentDatabase (children 1)
    ExpressionList
   Identifier dst_02224
   Identifier key
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 3)
    ExpressionList (children 1)
     Asterisk
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Function cluster (children 1)
        ExpressionList (children 4)
         Literal \'test_cluster_two_shards\'
         Function currentDatabase (children 1)
          ExpressionList
         Identifier src_02224
         Identifier key
    Set
 Set
