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As you can see, the performance of our inserts has increased tremendously. The procedure without the bulk bind took 17 times longer and also consumed 22 times more resources than the procedure with the bulk bind! A limitation of bulk bind as of Oracle 10g Release 1 is that it does not work with an array of objects. For example, in the preceding scenario, if we wanted to use an array of a single object with object_name and object_id as its attributes, the bulk bind will not work: benchmark@ORA10G> create or replace type object_data as object 2 ( 3 object_name varchar2(30), 4 object_id number 5 ) 6 / Type created. benchmark@ORA10G> create or replace type object_data_list as table of object_data; 2 / Type created. benchmark@ORA10G> declare 2 l_object_data_list object_data_list; 3 begin 4 select object_data( object_name, object_id ) 5 bulk collect into l_object_data_list 6 from all_objects 7 where rownum <= 5; 8 forall i in 1..l_object_data_list.count 9 insert into t5( object_name, object_id) values( l_object_data_list(i).object_name, l_object_data_list(i).object_id); 10 end; 11 / insert into t5( object_name, object_id) values( l_object_data_list(i).object_name, l_object_data_list(i).object_id); * ERROR at line 9: ORA-06550: line 9, column 53: PLS-00436: implementation restriction: cannot reference fields of BULK In-BIND table of records Handling Errors in Bulk Binding Since during bulk bind operations we process many rows at a time, if one or more rows result in an error, the entire operation is rolled back, but the exception information raised does not tell us which rows were at fault. Consider the following table, t6, in which we cannot insert null values in column x. We also have a check constraint such that only values between 1 and 10 (including 10) can be inserted:

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As an alternative, developers may choose to use a specific Microsoft API termed Passport. Passport services enable developers to design their websites in such a way that Microsoft persists and validates user-supplied credentials. The major benefit of Microsoft Passport services (as far as the end user is concerned) is the fact that the same username/password can be used for any website participating in the Passport initiative (this approach is termed single sign-in or SSI). This is the security model sites such as Hotmail and MSN.com use. The downside (as far as the developer is concerned) is she must now learn a new object model. Assuming your web application has been injected with the necessary Passport API calls, your web.config file will now be designed using a nested <passport> element that specifies the name of the page to redirect to if the current user has not supplied valid passport credentials: <configuration> <system.web> <authentication mode="Passport"/> <passport redirectUrl="Login.aspx"/> </authentication> </system.web> </configuration>

benchmark@ORA10G> create table t6( x number primary key constraint check_nonnegative_lt_10 check( x > 0 and x <= 10 )) ; Table created We then declare a PL/SQL array of numbers and store ten values in it, three of which (null, -5, and 11) are invalid if inserted into t6 When we insert the array values into table t6, we get a single array message for the first erroneous value (null) in the array: benchmark@ORA10G> declare 2 type number_table is table of number; 3 l_number_table number_table; 4 begin 5 l_number_table := number_table( 1, 2, 3, null, -5, 6, 7, 8, 9, 11); 6 forall i in 1.l_number_tablecount 7 insert into t6( x ) values ( l_number_table(i) ); 8 end; 9 / declare * ERROR at line 1: ORA-01400: cannot insert NULL into ("BENCHMARK""T6".

: ('a -> bool) -> 'a[] -> 'a[]

"X") ORA-06512: at line 6 Also, none of the records gets inserted, since the entire operation is rolled back, as shown by the following query: benchmark@ORA10G> select * from t6; no rows selected When you are inserting data in bulk, your requirement may be to successfully insert good records while getting a list of bad records that you can reinsert after incorporating the necessary corrections Starting with 9i, there is a way to save the exceptions raised during a bulk bind operation and print them out later This is shown in the following code snippet (the code should work the same in both 10g and 9i): benchmark@ORA10G> declare 2 type number_table is table of number; 3 l_number_table number_table; 4 begin 5 l_number_table := number_table( 1, 2, 3, null, -5, 6, 7, 8, 9, 11); 6 begin 7 forall i in 1.l_number_table.

Note We don t examine the details of the Microsoft Passport API in this chapter. If you require further

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count save exceptions 8 insert into t6( x ) values ( l_number_table(i) ); 9 exception 10 when others then 11 dbms_outputput_line( 'number of exceptions raised: ' || sql%bulk_exceptionscount ); 12 for i in 1.sql%bulk_exceptionscount loop 13 dbms_outputput_line( 'row number : ' ||.

Note Arrays of value types (such as int, single, double, int64) are stored flat, so only one object is

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