topic Re: working of modify statement in Application Development and Automation Discussions

working of modify statement

Former Member — Tue, 18 Mar 2008 07:20:25 GMT

Hye folks,

There is a scenario where there 4 fields in a data base.

Table Fields.

Serial Number PK

Article number

Article name

Price.

i have inserted the entry as 12... 123... xyz... 100...

13... 101... abc... 120...

now i wish to change the price of serial number 13 to 150 and also insert a new entry to table, i am getting the new entry created with modify and also a new entry for already existing row 13 with a changed price. there is a primary key violation.

internal table rows: 13... ... ... 150

modify dbtab from itab.

As per the definiton of modify it should update the existing row with a price of 150 but it is not happening, instead a new row is created.

As per the definiton of Primary key (PK), it shuld not allow duplicate.

How does a modify statement work in this scenario, why is ti giving a new entry.

Please help me in understanding the same.

thanks in advance.

Imran.

Re: working of modify statement

Former Member — Tue, 18 Mar 2008 07:24:29 GMT

here you need to use a condition WHERE for primary key field.

By using the condition a particular field will be replaced.

Thanks,

Balaram

Edited by: Balaram Devineni on Mar 18, 2008 8:25 AM

Re: working of modify statement

Former Member — Tue, 18 Mar 2008 07:27:48 GMT

Hi,

To Modify an entry:

Loop at itab into wa_tab where serial_no = '13'.

wa_itab-price = '150'.

modify itab from wa_itab transporting price.

endloop.

To add new entry, you have to append the values from the internal table to the table where you want to create new entries.

<REMOVED BY MODERATOR>

Thanks,

Parul.

Edited by: Alvaro Tejada Galindo on Mar 19, 2008 4:19 PM

Re: working of modify statement

Former Member — Tue, 18 Mar 2008 07:41:58 GMT

I am trying to update into a database table not into an internal table. So, please suggest accordingly.

thanks.

Re: working of modify statement

Former Member — Tue, 18 Mar 2008 08:02:22 GMT

suppose Itab is the internal table with the data,

then try it this way

itab-srno = 13.

modify dbtab from itab.

It worked for me.

and does dbtab has only SRNO as the primary key?

Thanks and regards,

Pavithra

Re: working of modify statement

Former Member — Tue, 18 Mar 2008 08:11:14 GMT

Imran try this one...

use UPDATE statement instead of Modify.

Regards,

Balaram D

Re: working of modify statement

Former Member — Tue, 18 Mar 2008 08:15:58 GMT

Hi,

Try this.

Loop at itab into wa_tab where serial_no = '13'.

wa_itab-price = '150'.

modify itab from wa_itab transporting price.

clear wa_itab.

endloop.

update dbtable from table itab where serial_no = '13'

<REMOVED BY MODERATOR>

regards,

Ramya

Edited by: Alvaro Tejada Galindo on Mar 19, 2008 4:19 PM

Re: working of modify statement

Former Member — Wed, 19 Mar 2008 15:54:46 GMT

modify .. this checks for the primary key, if a record has same primary key as in the internal it updates other wise a new row is created.