CreateQuery t_tuple_elem (children 3)
 Identifier t_tuple_elem
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration t1 (children 1)
    DataType Tuple (children 1)
     ExpressionList (children 2)
      NameTypePair a (children 1)
       DataType Array (children 1)
        ExpressionList (children 1)
         DataType UInt64
      NameTypePair b (children 1)
       DataType Array (children 1)
        ExpressionList (children 1)
         DataType LowCardinality (children 1)
          ExpressionList (children 1)
           DataType String
   ColumnDeclaration v (children 1)
    DataType Variant (children 1)
     ExpressionList (children 2)
      DataType Array (children 1)
       ExpressionList (children 1)
        DataType UInt64
      DataType Array (children 1)
       ExpressionList (children 1)
        DataType LowCardinality (children 1)
         ExpressionList (children 1)
          DataType String
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
