ABAP Select data from SAP table RETM_POSTING_RH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RETM_POSTING_RH
*  INTO TABLE @DATA(IT_RETM_POSTING_RH2).
*--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_RETM_POSTING_RH INDEX 1 INTO DATA(WA_RETM_POSTING_RH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RETM_POSTING_RH>-MANDT = 1.
<RETM_POSTING_RH>-INTRENO = 1.
<RETM_POSTING_RH>-TERMTYPE = 1.
<RETM_POSTING_RH>-TERMNO = 1.
<RETM_POSTING_RH>-VALIDFROM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RETM_POSTING_RH-VALIDTO, sy-vline,
  WA_RETM_POSTING_RH-FREQUENCY, sy-vline,
  WA_RETM_POSTING_RH-FREQUENCYUNIT, sy-vline,
  WA_RETM_POSTING_RH-WEEKFROM, sy-vline,
  WA_RETM_POSTING_RH-MONTHFROM, sy-vline,
  WA_RETM_POSTING_RH-CONDVALUEREFER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RETM_POSTING_RH 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_RETM_POSTING_RH 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_RETM_POSTING_RH INTO WA_RETM_POSTING_RH.


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

*Conversion exit REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_RETM_POSTING_RH-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RETM_POSTING_RH-VALIDTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FIXPER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RETM_POSTING_RH-FIXPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RETM_POSTING_RH-FIXPER.
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_RETM_POSTING_RH_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
TERMTYPE TYPE STRING,
TERMNO TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
FREQUENCY TYPE STRING,
FREQUENCYUNIT TYPE STRING,
WEEKFROM TYPE STRING,
MONTHFROM TYPE STRING,
CONDVALUEREFER TYPE STRING,
CONDVALUEREFDIF TYPE STRING,
PRORATE TYPE STRING,
CALCMETHPER TYPE STRING,
PAYMENTFORMRH TYPE STRING,
RHYTHMBEGIN TYPE STRING,
DUEDATECORRRULE TYPE STRING,
DUEDATECORRDAY TYPE STRING,
DUEDATECORRMONTH TYPE STRING,
DUEDATECORRYEAR TYPE STRING,
DUEDATECORRCAL TYPE STRING,
DUEDATECORRCALUN TYPE STRING,
DUEDATECALENDER TYPE STRING,
DUEDATEMOVEBEGIN TYPE STRING,
DUEDATEMOVEEND TYPE STRING,
FIXPER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RETM_POSTING_RH_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_RETM_POSTING_RH_STR-MANDT sy-vline 
WA_RETM_POSTING_RH_STR-INTRENO sy-vline 
WA_RETM_POSTING_RH_STR-TERMTYPE sy-vline 
WA_RETM_POSTING_RH_STR-TERMNO sy-vline 
WA_RETM_POSTING_RH_STR-VALIDFROM sy-vline 
WA_RETM_POSTING_RH_STR-VALIDTO sy-vline 
WA_RETM_POSTING_RH_STR-FREQUENCY sy-vline 
WA_RETM_POSTING_RH_STR-FREQUENCYUNIT sy-vline 
WA_RETM_POSTING_RH_STR-WEEKFROM sy-vline 
WA_RETM_POSTING_RH_STR-MONTHFROM sy-vline 
WA_RETM_POSTING_RH_STR-CONDVALUEREFER sy-vline 
WA_RETM_POSTING_RH_STR-CONDVALUEREFDIF sy-vline 
WA_RETM_POSTING_RH_STR-PRORATE sy-vline 
WA_RETM_POSTING_RH_STR-CALCMETHPER sy-vline 
WA_RETM_POSTING_RH_STR-PAYMENTFORMRH sy-vline 
WA_RETM_POSTING_RH_STR-RHYTHMBEGIN sy-vline 
WA_RETM_POSTING_RH_STR-DUEDATECORRRULE sy-vline 
WA_RETM_POSTING_RH_STR-DUEDATECORRDAY sy-vline 
WA_RETM_POSTING_RH_STR-DUEDATECORRMONTH sy-vline 
WA_RETM_POSTING_RH_STR-DUEDATECORRYEAR sy-vline 
WA_RETM_POSTING_RH_STR-DUEDATECORRCAL sy-vline 
WA_RETM_POSTING_RH_STR-DUEDATECORRCALUN sy-vline 
WA_RETM_POSTING_RH_STR-DUEDATECALENDER sy-vline 
WA_RETM_POSTING_RH_STR-DUEDATEMOVEBEGIN sy-vline 
WA_RETM_POSTING_RH_STR-DUEDATEMOVEEND sy-vline 
WA_RETM_POSTING_RH_STR-FIXPER sy-vline      INTO ld_text SEPARATED BY SPACE.

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