ABAP Select data from SAP table ROIIGMMM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIIGMMM
*  INTO TABLE @DATA(IT_ROIIGMMM2).
*--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_ROIIGMMM INDEX 1 INTO DATA(WA_ROIIGMMM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIIGMMM>-MANDT = 1.
<ROIIGMMM>-GMMNR = 1.
<ROIIGMMM>-FTMSTM = 1.
<ROIIGMMM>-TTMSTM = 1.
<ROIIGMMM>-MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIIGMMM-MATKL, sy-vline,
  WA_ROIIGMMM-ERDAT, sy-vline,
  WA_ROIIGMMM-ERZEIT, sy-vline,
  WA_ROIIGMMM-ERNAM, sy-vline,
  WA_ROIIGMMM-AEDAT, sy-vline,
  WA_ROIIGMMM-AEZEIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIIGMMM 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_ROIIGMMM 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_ROIIGMMM INTO WA_ROIIGMMM.


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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ROIIGMMM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIIGMMM-MATNR.
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_ROIIGMMM_STR, 
MANDT TYPE STRING,
GMMNR TYPE STRING,
FTMSTM TYPE STRING,
TTMSTM TYPE STRING,
MATNR TYPE STRING,
MATKL TYPE STRING,
ERDAT TYPE STRING,
ERZEIT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AEZEIT TYPE STRING,
AENAM TYPE STRING,
BLOIND TYPE STRING,
DELIND TYPE STRING,
TTMDAT TYPE STRING,
TTMTIM TYPE STRING,
FTMDAT TYPE STRING,
FTMTIM TYPE STRING,
CHKBOX TYPE STRING,
UPDFLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIIGMMM_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_ROIIGMMM_STR-MANDT sy-vline 
WA_ROIIGMMM_STR-GMMNR sy-vline 
WA_ROIIGMMM_STR-FTMSTM sy-vline 
WA_ROIIGMMM_STR-TTMSTM sy-vline 
WA_ROIIGMMM_STR-MATNR sy-vline 
WA_ROIIGMMM_STR-MATKL sy-vline 
WA_ROIIGMMM_STR-ERDAT sy-vline 
WA_ROIIGMMM_STR-ERZEIT sy-vline 
WA_ROIIGMMM_STR-ERNAM sy-vline 
WA_ROIIGMMM_STR-AEDAT sy-vline 
WA_ROIIGMMM_STR-AEZEIT sy-vline 
WA_ROIIGMMM_STR-AENAM sy-vline 
WA_ROIIGMMM_STR-BLOIND sy-vline 
WA_ROIIGMMM_STR-DELIND sy-vline 
WA_ROIIGMMM_STR-TTMDAT sy-vline 
WA_ROIIGMMM_STR-TTMTIM sy-vline 
WA_ROIIGMMM_STR-FTMDAT sy-vline 
WA_ROIIGMMM_STR-FTMTIM sy-vline 
WA_ROIIGMMM_STR-CHKBOX sy-vline 
WA_ROIIGMMM_STR-UPDFLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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