diff --git a/examples/dl2u_2-2.dl b/examples/dl2u_2-2.dl new file mode 100644 index 0000000..b1df2c1 --- /dev/null +++ b/examples/dl2u_2-2.dl @@ -0,0 +1,7 @@ +source a('A':int, 'B':int). +source b('B':int, 'C':int). +view v('A':int, 'B':int, 'C':int). +-a(A, B) :- a(A, B) , not __updated__v(A, B, _). +-b(B, C) :- a(GENV2, B) , b(B, C) , b(B, GENV3) , not -v(GENV2, B, GENV3) , not __updated__v(_, B, C). +__updated__v(A, B, C) :- a(A, B) , b(B, C) , not -v(A, B, C). +-v(GENV1, GENV2, GENV3) :- a(GENV1, GENV2) , b(GENV2, GENV3) , GENV2 = 30. diff --git a/src/ast2sql.ml b/src/ast2sql.ml index 22fb365..d14ff23 100644 --- a/src/ast2sql.ml +++ b/src/ast2sql.ml @@ -2505,6 +2505,7 @@ let convert_expr_to_operation_based_sql (expr : expr) : (sql_operation list, err table_env |> TableEnv.add table cols ) TableEnv.empty in + let view_name = expr.view |> Option.map (fun (view_name, _) -> view_name) in let existent_tables = table_env |> TableEnv.to_list |> List.map fst |> TableSet.of_list in let rules = List.rev expr.rules in (* `expr` holds its rules in the reversed order *) divide_rules_into_groups table_env rules >>= fun (rule_groups, table_env) -> @@ -2559,7 +2560,7 @@ let convert_expr_to_operation_based_sql (expr : expr) : (sql_operation list, err get_column_names_from_table ~error_detail:(InGroup delta_key) table_env table >>= fun cols -> let delta_env = delta_env |> DeltaEnv.add delta_key (temporary_table, cols) in let creation = SqlCreateTemporaryTable (temporary_table, sql_query) in - if TableSet.mem table existent_tables then + if Option.fold ~none:true ~some:((<>) table) view_name && TableSet.mem table existent_tables then let update = match delta_kind with | Insert ->