topic Re: Describe statement.... in Application Development and Automation Discussions

Describe statement....

Former Member — Thu, 31 Aug 2006 22:19:44 GMT

What is the use od describe statement ?

Re: Describe statement....

Former Member — Thu, 31 Aug 2006 22:23:21 GMT

It returns the attributes of a field, intenal table.

Re: Describe statement....

Former Member — Thu, 31 Aug 2006 22:43:21 GMT

So where does those returned attributes get stored ?

Re: Describe statement....

Former Member — Thu, 31 Aug 2006 22:52:01 GMT

This explains on using the DESCRIBE Statement.

http://saphelp47.pe-c.com//saphelp47/helpdata/EN/fc/eb3145358411d1829f0000e829fbfe/frameset.htm

Re: Describe statement....

Former Member — Thu, 31 Aug 2006 22:53:20 GMT

Hi,

If you use the DESCRIBE for an internal table..

DESCRIBE TABLE ITAB.

Then the number of the lines will be stored in

SY-TFILL.

Or you can directly a variable in the LINES addition.

DESCRIBE TABLE ITAB LINES V_LINES.

Thanks,

Naren

Re: Describe statement....

Former Member — Thu, 31 Aug 2006 23:54:14 GMT

Can you give a simple example when we need to use it ?

Re: Describe statement....

suresh_datti — Fri, 01 Sep 2006 00:38:33 GMT

DESCRIBE keyword is used to determine the attributes of a field, itab or a list at runtime ex:

DESCRIBE FIELD f length len type typ.

This will put the length of the field in the variable len & data type in typ.

DESCRIBE TABLE itab lines len occurs n.

This will put the number of lines of the itab in the variable len & the value of occurs parameter in variable n.

DESCRIBE LIST NUMBER OF LINES lin.

this Returns the number of lines in the list.

~Suresh

Re: Describe statement....

Former Member — Fri, 01 Sep 2006 01:02:20 GMT

Hi tushar,

DESCRIBE stmt is used to describe the attributes.

DESCRIBE FIELD - Describes the attributes of a field.

DESCRIBE LIST - Describes the attributes of a list.

DESCRIBE TABLE - Describes the attributes of the internal table.

Think of this scenario in dialog programming. While using Table control we need to find the number of lines , so that we can able to position our cursor for the deletion or updation of a record. To get the number of lines we use that Describe stmt.

Hope u understood. If my suggestion is valid, don't forget to award points.

Regards....

Arun.

Re: Describe statement....

Former Member — Fri, 01 Sep 2006 03:25:16 GMT

1. If you want to know the no of records in an internal table and to know internal tabe type ,

we use

DESCRIBE TABLE ITAB LINES V_LINES

TYPE V_TYPE.

DATA : V_LINES TYPE I.

now you can use V_LINES to print total no of records in that table.

V_TYPE to know the table is standard or sorted or hashed table.

2. FOR a FIELD

DESCRIBE FIELD V_FIELD LENGH V_LENGTH IN CHARACTER MODE.

to know the length of the variable (while defining) it will come to V_LENGTH.

Regards

srikanth