ABAP Select data from SAP table RPCAC87 into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RPCAC87 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 RPCAC87. 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 RPCAC87 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_RPCAC87 TYPE STANDARD TABLE OF RPCAC87,
      WA_RPCAC87 TYPE RPCAC87,
      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: <RPCAC87> TYPE RPCAC87.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RPCAC87.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RPCAC87
  INTO TABLE IT_RPCAC87.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RPCAC87
*  INTO TABLE @DATA(IT_RPCAC872).
*--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_RPCAC87 INDEX 1 INTO DATA(WA_RPCAC872).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RPCAC87 ASSIGNING <RPCAC87>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RPCAC87>-RCLNT = 1.
<RPCAC87>-RLDNR = 1.
<RPCAC87>-KOKRS = 1.
<RPCAC87>-DOCTY = 1.
<RPCAC87>-DOCNR = 1.

ENDLOOP.

LOOP AT IT_RPCAC87 INTO WA_RPCAC87.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RPCAC87-DOCLN, sy-vline,
  WA_RPCAC87-BUDAT, sy-vline,
  WA_RPCAC87-PLIKZ, sy-vline,
  WA_RPCAC87-RYEAR, sy-vline,
  WA_RPCAC87-RPMAX, sy-vline,
  WA_RPCAC87-RBUKRS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RPCAC87 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_RPCAC87 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_RPCAC87 INTO WA_RPCAC87.


*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 ALPHA, internal->external for field RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RPCAC87-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCAC87-RLDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RPCAC87-DOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCAC87-DOCNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RPCAC87-RYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCAC87-RYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RVERS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RPCAC87-RVERS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCAC87-RVERS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RPRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RPCAC87-RPRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCAC87-RPRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field REP_MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RPCAC87-REP_MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCAC87-REP_MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RPCAC87-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCAC87-LOGSYS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field RUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RPCAC87-RUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCAC87-RUNIT.
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_RPCAC87_STR, 
RCLNT TYPE STRING,
RLDNR TYPE STRING,
KOKRS TYPE STRING,
DOCTY TYPE STRING,
DOCNR TYPE STRING,
DOCLN TYPE STRING,
BUDAT TYPE STRING,
PLIKZ TYPE STRING,
RYEAR TYPE STRING,
RPMAX TYPE STRING,
RBUKRS TYPE STRING,
RVERS TYPE STRING,
RPRCTR TYPE STRING,
STAGR TYPE STRING,
WERKS TYPE STRING,
REP_MATNR TYPE STRING,
RHOART TYPE STRING,
OCLNT TYPE STRING,
LOGSYS TYPE STRING,
MSL TYPE STRING,
RUNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RPCAC87_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_RPCAC87_STR-RCLNT sy-vline 
WA_RPCAC87_STR-RLDNR sy-vline 
WA_RPCAC87_STR-KOKRS sy-vline 
WA_RPCAC87_STR-DOCTY sy-vline 
WA_RPCAC87_STR-DOCNR sy-vline 
WA_RPCAC87_STR-DOCLN sy-vline 
WA_RPCAC87_STR-BUDAT sy-vline 
WA_RPCAC87_STR-PLIKZ sy-vline 
WA_RPCAC87_STR-RYEAR sy-vline 
WA_RPCAC87_STR-RPMAX sy-vline 
WA_RPCAC87_STR-RBUKRS sy-vline 
WA_RPCAC87_STR-RVERS sy-vline 
WA_RPCAC87_STR-RPRCTR sy-vline 
WA_RPCAC87_STR-STAGR sy-vline 
WA_RPCAC87_STR-WERKS sy-vline 
WA_RPCAC87_STR-REP_MATNR sy-vline 
WA_RPCAC87_STR-RHOART sy-vline 
WA_RPCAC87_STR-OCLNT sy-vline 
WA_RPCAC87_STR-LOGSYS sy-vline 
WA_RPCAC87_STR-MSL sy-vline 
WA_RPCAC87_STR-RUNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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