CreateQuery constraint_on_low_cardinality_nullable_type (children 3)
 Identifier constraint_on_low_cardinality_nullable_type
 Columns definition (children 2)
  ExpressionList (children 1)
   ColumnDeclaration id (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType Nullable (children 1)
       ExpressionList (children 1)
        DataType UInt64
  ExpressionList (children 1)
   Constraint (children 1)
    Function equals (children 1)
     ExpressionList (children 2)
      Identifier id
      Literal UInt64_3
 Storage definition (children 1)
  Function TinyLog
