Manual tabular form "Update Process"

Question

Hello,
i made a tabular form manually,
now i want to add an update process, but its not working?
I created a Button "P_UPDATE" and i added a Process which listens to the P_UPDATE Button.
i used the following PL/SQL script:
for i in 1..htmldb_application.g_f01.count
loop
update MATCHUMSATZ
set PARTNER_ID = replace(htmldb_application.g_f10(i),'%'||'null%',NULL),
RECH_DATUM = replace(htmldb_application.g_f02(i),'%'||'null%',null),
RECH_NR= htmldb_application.g_f06(i),
PROV_GRUNDLAGE= htmldb_application.g_f08(i),
KUNDE= htmldb_application.g_f14(i),
VERTRIEBSART_ID = replace(htmldb_application.g_f17(i),'%'||'null%',NULL)
where id = htmldb_application.g_f01(i);
end loop;
This is an example which i customized from: http://www.oracle.com/technology/products/database/application_express/howtos/tabular_form.html
I suppose that 'htmldb_application.g_f01' is the ID of the table 'MATCHUMSATZ'.
Why is there replace() and sometimes not ?
Would be glad if anybody could help me!
Phil

Answer 1

Hi Phil,
You can add in the in-built MRU update process that will do this for you. When you add a process, select Data Manipulation then Multi Row Update, then follow the prompts to link it to your table.
In your code snippet, htmldb_application.g_f01 refers to the first column in your form (even if this is hidden). Normally this is the Primary Key for the table on which the form is based. htmldb_application.g_f02 refers to the second column and so on, although you can assign any number from 1 to 50 to each field when you create the sql statement.
The replace() function is used because some of the fields will contain %null% which needs to be converted to null before updating the table.
Regards
Andy