ABAP Select data from SAP table RCGAPIPIHS 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 RCGAPIPIHS 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 RCGAPIPIHS. 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 RCGAPIPIHS 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_RCGAPIPIHS TYPE STANDARD TABLE OF RCGAPIPIHS,
      WA_RCGAPIPIHS TYPE RCGAPIPIHS,
      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: <RCGAPIPIHS> TYPE RCGAPIPIHS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGAPIPIHS
*  INTO TABLE @DATA(IT_RCGAPIPIHS2).
*--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_RCGAPIPIHS INDEX 1 INTO DATA(WA_RCGAPIPIHS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGAPIPIHS>-RECN = 1.
<RCGAPIPIHS>-PHRKEY = 1.
<RCGAPIPIHS>-RECN_USER = 1.
<RCGAPIPIHS>-ACTN_USER = 1.
<RCGAPIPIHS>-MODULE_USER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGAPIPIHS-TABNAME_USER, sy-vline,
  WA_RCGAPIPIHS-FIELDNAM_USER, sy-vline,
  WA_RCGAPIPIHS-FIELDDSC_USER, sy-vline,
  WA_RCGAPIPIHS-ENTRYID, sy-vline,
  WA_RCGAPIPIHS-DESCRIPTION, sy-vline,
  WA_RCGAPIPIHS-VALFR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGAPIPIHS 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_RCGAPIPIHS 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_RCGAPIPIHS INTO WA_RCGAPIPIHS.


*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 RECN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCGAPIPIHS-RECN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGAPIPIHS-RECN.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field RECNROOT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCGAPIPIHS-RECNROOT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGAPIPIHS-RECNROOT.
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_RCGAPIPIHS_STR, 
RECN TYPE STRING,
PHRKEY TYPE STRING,
RECN_USER TYPE STRING,
ACTN_USER TYPE STRING,
MODULE_USER TYPE STRING,
TABNAME_USER TYPE STRING,
FIELDNAM_USER TYPE STRING,
FIELDDSC_USER TYPE STRING,
ENTRYID TYPE STRING,
DESCRIPTION TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
AENNR TYPE STRING,
DELFLG TYPE STRING,
PARKFLG TYPE STRING,
CRDAT TYPE STRING,
CRNAM TYPE STRING,
UPDDAT TYPE STRING,
UPDNAM TYPE STRING,
SRSID TYPE STRING,
OWNID TYPE STRING,
RECNROOT TYPE STRING,
ERRORMODE TYPE STRING,
ERRORINFO TYPE STRING,
ERRORCLASS TYPE STRING,
ERRORPARAM TYPE STRING,
LOGLOCKMOD TYPE STRING,
EXTINFO TYPE STRING,
LINEMOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGAPIPIHS_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_RCGAPIPIHS_STR-RECN sy-vline 
WA_RCGAPIPIHS_STR-PHRKEY sy-vline 
WA_RCGAPIPIHS_STR-RECN_USER sy-vline 
WA_RCGAPIPIHS_STR-ACTN_USER sy-vline 
WA_RCGAPIPIHS_STR-MODULE_USER sy-vline 
WA_RCGAPIPIHS_STR-TABNAME_USER sy-vline 
WA_RCGAPIPIHS_STR-FIELDNAM_USER sy-vline 
WA_RCGAPIPIHS_STR-FIELDDSC_USER sy-vline 
WA_RCGAPIPIHS_STR-ENTRYID sy-vline 
WA_RCGAPIPIHS_STR-DESCRIPTION sy-vline 
WA_RCGAPIPIHS_STR-VALFR sy-vline 
WA_RCGAPIPIHS_STR-VALTO sy-vline 
WA_RCGAPIPIHS_STR-AENNR sy-vline 
WA_RCGAPIPIHS_STR-DELFLG sy-vline 
WA_RCGAPIPIHS_STR-PARKFLG sy-vline 
WA_RCGAPIPIHS_STR-CRDAT sy-vline 
WA_RCGAPIPIHS_STR-CRNAM sy-vline 
WA_RCGAPIPIHS_STR-UPDDAT sy-vline 
WA_RCGAPIPIHS_STR-UPDNAM sy-vline 
WA_RCGAPIPIHS_STR-SRSID sy-vline 
WA_RCGAPIPIHS_STR-OWNID sy-vline 
WA_RCGAPIPIHS_STR-RECNROOT sy-vline 
WA_RCGAPIPIHS_STR-ERRORMODE sy-vline 
WA_RCGAPIPIHS_STR-ERRORINFO sy-vline 
WA_RCGAPIPIHS_STR-ERRORCLASS sy-vline 
WA_RCGAPIPIHS_STR-ERRORPARAM sy-vline 
WA_RCGAPIPIHS_STR-LOGLOCKMOD sy-vline 
WA_RCGAPIPIHS_STR-EXTINFO sy-vline 
WA_RCGAPIPIHS_STR-LINEMOD sy-vline      INTO ld_text SEPARATED BY SPACE.

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