topic Re: Component names via ( string ) in Application Development and Automation Discussions

Component names via ( string )

Former Member — Mon, 11 Apr 2011 08:23:00 GMT

Hello Everybody!

I had a similar question previously about calling a column name based on a string placing a variable inbetween ( ) when using SQL queries.

However, I'm trying to call the name of a variable and component based on a string. When I try doing:

var1 = var2-(varColumn)

I get a dump saying var2 has no component named ''.

I've also tried to do the entire variable name, like:


column_name = '-c1'.
variable_name='whatever'.

CONCATENATE variable_name column_name INTO total_name.
var1 = (total_name).

This doesn't compile, and if I activate and try to run the program anyway I get an error over an non-exsistant variable.

My searches across google and here aren't really producing great results. Is doing it this way even possible?

Thanks for the help!

Re: Component names via ( string )

SuhaSaha — Mon, 11 Apr 2011 08:54:06 GMT

Hello Bryan,

Are you trying to SELECT data using "dynamic" columns? Did you check the F1 help or the online documentation? [http://help.sap.com/abapdocu_702/en/abapselect_clause_cols.htm#!ABAP_ALTERNATIVE_3@3@]

BR,

Suhas

Re: Component names via ( string )

Former Member — Mon, 11 Apr 2011 08:59:58 GMT

Hey Suhas,

No, I've already gotten that one figured out.


  UPDATE (table_name)
    SET (column_name)
    WHERE LETTER = row.

I have a structure and a lengthy CASE block, for example:


  CASE column.
    WHEN 1.
      char = lc_board_s-c1.
    WHEN 2.
      char = lc_board_s-c2.
              ...
    WHEN 10.
      char = lc_board_s-c10.
  ENDCASE.

The SQL has query has been executed by this point. I just want to be able to call the component of the structure variably, so I can reduce the block to (psuedocoding).


   character = structure-(variable_component_name).

Re: Component names via ( string )

kesavadas_thekkillath — Mon, 11 Apr 2011 10:23:26 GMT

Check F1 help of ASSIGN COMPONENT

Re: Component names via ( string )

Former Member — Mon, 11 Apr 2011 10:24:45 GMT

You need to use field symbols like this;

1. First declare the field symbol

FIELD-SYMBOLS <fs> like var2-col2.

*2 Now dynamically assign the column

ASSIGN COMPONENT 'COL2' OF STRUCTURE var2 to <fs>.

*<fs> now has the value var2-col2

Re: Component names via ( string )

SuhaSaha — Mon, 11 Apr 2011 10:39:42 GMT

Hello Bryan,

Is this what you're looking for:

FIELD-SYMBOLS <val> TYPE ANY.

WHILE sy-subrc = 0.
  ASSIGN COMPONENT sy-index OF STRUCTURE wa TO <val>.
  CHECK <val> IS ASSIGNED.
  WRITE: / <val>.
  UNASSIGN <val>.
ENDWHILE.

BR,

Suhas

Re: Component names via ( string )

Former Member — Mon, 11 Apr 2011 11:00:41 GMT

Thanks everybody! That's exactly what I was looking for. I was trying to search google and the forums here but wasn't sure what the proper term was for it.

Thanks!