ABAP Select data from SAP table R021 into internal table

Get Example source ABAP code based on a different SAP table
  

Below is a number of ABAP code snippets to demonstrate how to select data from SAP R021 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 R021. 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 R021 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_R021 TYPE STANDARD TABLE OF R021,
      WA_R021 TYPE R021,
      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: <R021> TYPE R021.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_R021.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM R021
  INTO TABLE IT_R021.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM R021
*  INTO TABLE @DATA(IT_R0212).
*--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_R021 INDEX 1 INTO DATA(WA_R0212).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_R021 ASSIGNING <R021>.
*To update a field value using a field symbol simply change the value via the field symbol pointer
<R021>-VVARN = 1.
<R021>-NVARN = 1.
<R021>-KTXT1 = 1.
<R021>-KTXT2 = 1.
<R021>-KTXT3 = 1.
ENDLOOP.

LOOP AT IT_R021 INTO WA_R021.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_R021-KTXT4, sy-vline,
WA_R021-KTXT5, sy-vline,
WA_R021-KOART, sy-vline,
WA_R021-UEB01, sy-vline,
WA_R021-UEB02, sy-vline,
WA_R021-FELDN, sy-vline.
ENDLOOP. *Add any further fields from structure WA_R021 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_R021 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_R021 INTO WA_R021. *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.
ENDFORM. *&---------------------------------------------------------------------* *& Form process_as_string_field_values *&---------------------------------------------------------------------* FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO. TYPES: BEGIN OF T_R021_STR,
VVARN TYPE STRING,
NVARN TYPE STRING,
KTXT1 TYPE STRING,
KTXT2 TYPE STRING,
KTXT3 TYPE STRING,
KTXT4 TYPE STRING,
KTXT5 TYPE STRING,
KOART TYPE STRING,
UEB01 TYPE STRING,
UEB02 TYPE STRING,
FELDN TYPE STRING,
LSTCL TYPE STRING,
XSOVA TYPE STRING,
TBNAM TYPE STRING,END OF T_EKKO_STR. DATA: WA_R021_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_R021_STR-VVARN sy-vline
WA_R021_STR-NVARN sy-vline
WA_R021_STR-KTXT1 sy-vline
WA_R021_STR-KTXT2 sy-vline
WA_R021_STR-KTXT3 sy-vline
WA_R021_STR-KTXT4 sy-vline
WA_R021_STR-KTXT5 sy-vline
WA_R021_STR-KOART sy-vline
WA_R021_STR-UEB01 sy-vline
WA_R021_STR-UEB02 sy-vline
WA_R021_STR-FELDN sy-vline
WA_R021_STR-LSTCL sy-vline
WA_R021_STR-XSOVA sy-vline
WA_R021_STR-TBNAM sy-vline INTO ld_text SEPARATED BY SPACE. *Add any further fields from structure WA_EKKO_STR you want to CONCATENATE... ENDLOOP. ENDFORM.