CreateQuery ary_lc_null (children 3)
 Identifier ary_lc_null
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration i (children 1)
    DataType int
   ColumnDeclaration v (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType LowCardinality (children 1)
       ExpressionList (children 1)
        DataType Nullable (children 1)
         ExpressionList (children 1)
          DataType String
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Identifier i