ABAP Select data from SAP table RPCA4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RPCA4 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 RPCA4. 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 RPCA4 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_RPCA4 TYPE STANDARD TABLE OF RPCA4,
      WA_RPCA4 TYPE RPCA4,
      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: <RPCA4> TYPE RPCA4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RPCA4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RPCA4
  INTO TABLE IT_RPCA4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RPCA4
*  INTO TABLE @DATA(IT_RPCA42).
*--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_RPCA4 INDEX 1 INTO DATA(WA_RPCA42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RPCA4 ASSIGNING <RPCA4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RPCA4>-MANDT = 1.
<RPCA4>-KOKRS = 1.
<RPCA4>-RBUKRS = 1.
<RPCA4>-BUKRSSET = 1.
<RPCA4>-RLDNR = 1.

ENDLOOP.

LOOP AT IT_RPCA4 INTO WA_RPCA4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RPCA4-RPMAX1, sy-vline,
  WA_RPCA4-RPMAX2, sy-vline,
  WA_RPCA4-RPMAX3, sy-vline,
  WA_RPCA4-RPMAX4, sy-vline,
  WA_RPCA4-RYEAR1, sy-vline,
  WA_RPCA4-RYEAR2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RPCA4 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_RPCA4 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_RPCA4 INTO WA_RPCA4.


*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_RPCA4-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCA4-RLDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RYEAR1
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RPCA4-RYEAR1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCA4-RYEAR1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RYEAR2
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RPCA4-RYEAR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCA4-RYEAR2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RVERS1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RPCA4-RVERS1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCA4-RVERS1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RVERS2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RPCA4-RVERS2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCA4-RVERS2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RPCA4-PRCTR1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCA4-PRCTR1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RPCA4-PRCTR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCA4-PRCTR2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RACCT1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RPCA4-RACCT1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCA4-RACCT1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RACCT2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RPCA4-RACCT2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCA4-RACCT2.
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_RPCA4_STR, 
MANDT TYPE STRING,
KOKRS TYPE STRING,
RBUKRS TYPE STRING,
BUKRSSET TYPE STRING,
RLDNR TYPE STRING,
RPMAX1 TYPE STRING,
RPMAX2 TYPE STRING,
RPMAX3 TYPE STRING,
RPMAX4 TYPE STRING,
RYEAR1 TYPE STRING,
RYEAR2 TYPE STRING,
RVERS1 TYPE STRING,
RVERS2 TYPE STRING,
RHOART TYPE STRING,
PCSET1 TYPE STRING,
PCSET2 TYPE STRING,
ACCTSET1 TYPE STRING,
ACCTSET2 TYPE STRING,
PRCTR1 TYPE STRING,
PRCTR2 TYPE STRING,
RACCT1 TYPE STRING,
RACCT2 TYPE STRING,
T_KOKRS TYPE STRING,
T_BUKRS TYPE STRING,
T_RPMAX1 TYPE STRING,
T_RPMAX2 TYPE STRING,
T_RPMAX3 TYPE STRING,
T_RPMAX4 TYPE STRING,
T_RYEAR1 TYPE STRING,
T_RYEAR2 TYPE STRING,
T_PRCTR1 TYPE STRING,
T_PRCTR2 TYPE STRING,
T_RACCT1 TYPE STRING,
T_RACCT2 TYPE STRING,
T_RVERS1 TYPE STRING,
T_RVERS2 TYPE STRING,
I_PRCTR1 TYPE STRING,
I_PRCTR2 TYPE STRING,
I_RACCT1 TYPE STRING,
I_RACCT2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RPCA4_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_RPCA4_STR-MANDT sy-vline 
WA_RPCA4_STR-KOKRS sy-vline 
WA_RPCA4_STR-RBUKRS sy-vline 
WA_RPCA4_STR-BUKRSSET sy-vline 
WA_RPCA4_STR-RLDNR sy-vline 
WA_RPCA4_STR-RPMAX1 sy-vline 
WA_RPCA4_STR-RPMAX2 sy-vline 
WA_RPCA4_STR-RPMAX3 sy-vline 
WA_RPCA4_STR-RPMAX4 sy-vline 
WA_RPCA4_STR-RYEAR1 sy-vline 
WA_RPCA4_STR-RYEAR2 sy-vline 
WA_RPCA4_STR-RVERS1 sy-vline 
WA_RPCA4_STR-RVERS2 sy-vline 
WA_RPCA4_STR-RHOART sy-vline 
WA_RPCA4_STR-PCSET1 sy-vline 
WA_RPCA4_STR-PCSET2 sy-vline 
WA_RPCA4_STR-ACCTSET1 sy-vline 
WA_RPCA4_STR-ACCTSET2 sy-vline 
WA_RPCA4_STR-PRCTR1 sy-vline 
WA_RPCA4_STR-PRCTR2 sy-vline 
WA_RPCA4_STR-RACCT1 sy-vline 
WA_RPCA4_STR-RACCT2 sy-vline 
WA_RPCA4_STR-T_KOKRS sy-vline 
WA_RPCA4_STR-T_BUKRS sy-vline 
WA_RPCA4_STR-T_RPMAX1 sy-vline 
WA_RPCA4_STR-T_RPMAX2 sy-vline 
WA_RPCA4_STR-T_RPMAX3 sy-vline 
WA_RPCA4_STR-T_RPMAX4 sy-vline 
WA_RPCA4_STR-T_RYEAR1 sy-vline 
WA_RPCA4_STR-T_RYEAR2 sy-vline 
WA_RPCA4_STR-T_PRCTR1 sy-vline 
WA_RPCA4_STR-T_PRCTR2 sy-vline 
WA_RPCA4_STR-T_RACCT1 sy-vline 
WA_RPCA4_STR-T_RACCT2 sy-vline 
WA_RPCA4_STR-T_RVERS1 sy-vline 
WA_RPCA4_STR-T_RVERS2 sy-vline 
WA_RPCA4_STR-I_PRCTR1 sy-vline 
WA_RPCA4_STR-I_PRCTR2 sy-vline 
WA_RPCA4_STR-I_RACCT1 sy-vline 
WA_RPCA4_STR-I_RACCT2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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