CreateQuery lc_null_int8_defnull (children 3)
 Identifier lc_null_int8_defnull
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration val (children 2)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType Nullable (children 1)
       ExpressionList (children 1)
        DataType Int8
    Literal NULL
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
