SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 3)
    Identifier id
    Function tuple (alias a) (children 1)
     ExpressionList (children 2)
      Function replaceAll (alias col_a) (children 1)
       ExpressionList (children 3)
        Identifier data
        Literal \'a\'
        Literal \'e\'
      Identifier type
    Function tuple (alias b) (children 1)
     ExpressionList (children 2)
      Function replaceAll (alias col_b) (children 1)
       ExpressionList (children 3)
        Identifier data
        Literal \'a\'
        Literal \'e\'
      Identifier type
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function cluster (children 1)
       ExpressionList (children 3)
        Identifier test_cluster_two_shards
        Function currentDatabase (children 1)
         ExpressionList
        Identifier src
   Set
 Identifier JSONEachRow
