CreateQuery test (children 3)
 Identifier test
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration v (children 1)
    DataType Variant (children 1)
     ExpressionList (children 1)
      DataType Array (children 1)
       ExpressionList (children 1)
        DataType Nullable (children 1)
         ExpressionList (children 1)
          DataType String
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
