ABAP Select data from SAP table RCS00160_ALV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RCS00160_ALV table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to RCS00160_ALV. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the RCS00160_ALV table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_RCS00160_ALV TYPE STANDARD TABLE OF RCS00160_ALV,
      WA_RCS00160_ALV TYPE RCS00160_ALV,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <RCS00160_ALV> TYPE RCS00160_ALV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RCS00160_ALV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RCS00160_ALV
  INTO TABLE IT_RCS00160_ALV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCS00160_ALV
*  INTO TABLE @DATA(IT_RCS00160_ALV2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_RCS00160_ALV INDEX 1 INTO DATA(WA_RCS00160_ALV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RCS00160_ALV ASSIGNING <RCS00160_ALV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCS00160_ALV>-COL1 = 1.
<RCS00160_ALV>-COL2 = 1.
<RCS00160_ALV>-COL3 = 1.
<RCS00160_ALV>-COL4 = 1.
<RCS00160_ALV>-COL5 = 1.

ENDLOOP.

LOOP AT IT_RCS00160_ALV INTO WA_RCS00160_ALV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCS00160_ALV-COL6, sy-vline,
  WA_RCS00160_ALV-COL7, sy-vline,
  WA_RCS00160_ALV-COL8, sy-vline,
  WA_RCS00160_ALV-COL9, sy-vline,
  WA_RCS00160_ALV-COL10, sy-vline,
  WA_RCS00160_ALV-COL11, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCS00160_ALV you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_RCS00160_ALV TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_RCS00160_ALV INTO WA_RCS00160_ALV.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit NUMCV, internal->external for field COL2
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_RCS00160_ALV-COL2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCS00160_ALV-COL2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field COL7
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RCS00160_ALV-COL7
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCS00160_ALV-COL7.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RCS00160_ALV_STR, 
COL1 TYPE STRING,
COL2 TYPE STRING,
COL3 TYPE STRING,
COL4 TYPE STRING,
COL5 TYPE STRING,
COL6 TYPE STRING,
COL7 TYPE STRING,
COL8 TYPE STRING,
COL9 TYPE STRING,
COL10 TYPE STRING,
COL11 TYPE STRING,
COL12 TYPE STRING,
COL13 TYPE STRING,
COL14 TYPE STRING,
COL15 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCS00160_ALV_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_RCS00160_ALV_STR-COL1 sy-vline 
WA_RCS00160_ALV_STR-COL2 sy-vline 
WA_RCS00160_ALV_STR-COL3 sy-vline 
WA_RCS00160_ALV_STR-COL4 sy-vline 
WA_RCS00160_ALV_STR-COL5 sy-vline 
WA_RCS00160_ALV_STR-COL6 sy-vline 
WA_RCS00160_ALV_STR-COL7 sy-vline 
WA_RCS00160_ALV_STR-COL8 sy-vline 
WA_RCS00160_ALV_STR-COL9 sy-vline 
WA_RCS00160_ALV_STR-COL10 sy-vline 
WA_RCS00160_ALV_STR-COL11 sy-vline 
WA_RCS00160_ALV_STR-COL12 sy-vline 
WA_RCS00160_ALV_STR-COL13 sy-vline 
WA_RCS00160_ALV_STR-COL14 sy-vline 
WA_RCS00160_ALV_STR-COL15 sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.