ABAP Select data from SAP table PSG_RPCTGMLR0_DTAB4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PSG_RPCTGMLR0_DTAB4 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 PSG_RPCTGMLR0_DTAB4. 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 PSG_RPCTGMLR0_DTAB4 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_PSG_RPCTGMLR0_DTAB4 TYPE STANDARD TABLE OF PSG_RPCTGMLR0_DTAB4,
      WA_PSG_RPCTGMLR0_DTAB4 TYPE PSG_RPCTGMLR0_DTAB4,
      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: <PSG_RPCTGMLR0_DTAB4> TYPE PSG_RPCTGMLR0_DTAB4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PSG_RPCTGMLR0_DTAB4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PSG_RPCTGMLR0_DTAB4
  INTO TABLE IT_PSG_RPCTGMLR0_DTAB4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSG_RPCTGMLR0_DTAB4
*  INTO TABLE @DATA(IT_PSG_RPCTGMLR0_DTAB42).
*--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_PSG_RPCTGMLR0_DTAB4 INDEX 1 INTO DATA(WA_PSG_RPCTGMLR0_DTAB42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PSG_RPCTGMLR0_DTAB4 ASSIGNING <PSG_RPCTGMLR0_DTAB4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSG_RPCTGMLR0_DTAB4>-CPF_REFNO = 1.
<PSG_RPCTGMLR0_DTAB4>-OFF_TEL = 1.
<PSG_RPCTGMLR0_DTAB4>-EMAIL = 1.
<PSG_RPCTGMLR0_DTAB4>-FAX_NO = 1.
<PSG_RPCTGMLR0_DTAB4>-BANK_NAME = 1.

ENDLOOP.

LOOP AT IT_PSG_RPCTGMLR0_DTAB4 INTO WA_PSG_RPCTGMLR0_DTAB4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSG_RPCTGMLR0_DTAB4-BANK_PART, sy-vline,
  WA_PSG_RPCTGMLR0_DTAB4-FOR_COMP_ADD, sy-vline,
  WA_PSG_RPCTGMLR0_DTAB4-NAME, sy-vline,
  WA_PSG_RPCTGMLR0_DTAB4-NRIC_NO, sy-vline,
  WA_PSG_RPCTGMLR0_DTAB4-ST_DAT_EMP, sy-vline,
  WA_PSG_RPCTGMLR0_DTAB4-ED_DAT_EMP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSG_RPCTGMLR0_DTAB4 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_PSG_RPCTGMLR0_DTAB4 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_PSG_RPCTGMLR0_DTAB4 INTO WA_PSG_RPCTGMLR0_DTAB4.


*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_PSG_RPCTGMLR0_DTAB4_STR, 
CPF_REFNO TYPE STRING,
OFF_TEL TYPE STRING,
EMAIL TYPE STRING,
FAX_NO TYPE STRING,
BANK_NAME TYPE STRING,
BANK_PART TYPE STRING,
FOR_COMP_ADD TYPE STRING,
NAME TYPE STRING,
NRIC_NO TYPE STRING,
ST_DAT_EMP TYPE STRING,
ED_DAT_EMP TYPE STRING,
EMP_STATUS TYPE STRING,
DAYS_WEEK TYPE STRING,
RESI_STATUS TYPE STRING,
BEGDA1 TYPE STRING,
BEGDA2 TYPE STRING,
BEGDA3 TYPE STRING,
BEGDA4 TYPE STRING,
BEGDA5 TYPE STRING,
BEGDA6 TYPE STRING,
BEGDA7 TYPE STRING,
BEGDA8 TYPE STRING,
ENDDA1 TYPE STRING,
ENDDA2 TYPE STRING,
ENDDA3 TYPE STRING,
ENDDA4 TYPE STRING,
ENDDA5 TYPE STRING,
ENDDA6 TYPE STRING,
ENDDA7 TYPE STRING,
ENDDA8 TYPE STRING,
YEAR_CLAIM TYPE STRING,
DETAIL_TAB TYPE STRING,
LESS_REASON TYPE STRING,
ER_NAME TYPE STRING,
ER_NRIC TYPE STRING,
ER_SIGN TYPE STRING,
ER_DATE TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
CUT_LINES TYPE STRING,
WEEK_WKDAY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSG_RPCTGMLR0_DTAB4_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_PSG_RPCTGMLR0_DTAB4_STR-CPF_REFNO sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-OFF_TEL sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-EMAIL sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-FAX_NO sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-BANK_NAME sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-BANK_PART sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-FOR_COMP_ADD sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-NAME sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-NRIC_NO sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-ST_DAT_EMP sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-ED_DAT_EMP sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-EMP_STATUS sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-DAYS_WEEK sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-RESI_STATUS sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-BEGDA1 sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-BEGDA2 sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-BEGDA3 sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-BEGDA4 sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-BEGDA5 sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-BEGDA6 sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-BEGDA7 sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-BEGDA8 sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-ENDDA1 sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-ENDDA2 sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-ENDDA3 sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-ENDDA4 sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-ENDDA5 sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-ENDDA6 sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-ENDDA7 sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-ENDDA8 sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-YEAR_CLAIM sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-DETAIL_TAB sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-LESS_REASON sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-ER_NAME sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-ER_NRIC sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-ER_SIGN sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-ER_DATE sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-BEGDA sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-ENDDA sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-CUT_LINES sy-vline 
WA_PSG_RPCTGMLR0_DTAB4_STR-WEEK_WKDAY sy-vline      INTO ld_text SEPARATED BY SPACE.

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