ABAP Select data from SAP table ROIRC_MRREJ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIRC_MRREJ
*  INTO TABLE @DATA(IT_ROIRC_MRREJ2).
*--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_ROIRC_MRREJ INDEX 1 INTO DATA(WA_ROIRC_MRREJ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIRC_MRREJ>-GMMNR = 1.
<ROIRC_MRREJ>-ETMSTM = 1.
<ROIRC_MRREJ>-METEV = 1.
<ROIRC_MRREJ>-MATNR = 1.
<ROIRC_MRREJ>-MCOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIRC_MRREJ-CONFAC, sy-vline,
  WA_ROIRC_MRREJ-BASME, sy-vline,
  WA_ROIRC_MRREJ-MENGE, sy-vline,
  WA_ROIRC_MRREJ-XMCOUNT, sy-vline,
  WA_ROIRC_MRREJ-XMATNR, sy-vline,
  WA_ROIRC_MRREJ-XCONFAC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIRC_MRREJ 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_ROIRC_MRREJ 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_ROIRC_MRREJ INTO WA_ROIRC_MRREJ.


*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_ROIRC_MRREJ-GMMNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIRC_MRREJ-GMMNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ROIRC_MRREJ-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIRC_MRREJ-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BASME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ROIRC_MRREJ-BASME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIRC_MRREJ-BASME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field XMATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ROIRC_MRREJ-XMATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIRC_MRREJ-XMATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field KMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ROIRC_MRREJ-KMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIRC_MRREJ-KMEIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field XKMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ROIRC_MRREJ-XKMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIRC_MRREJ-XKMEIN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field KMEIN_TARGET
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ROIRC_MRREJ-KMEIN_TARGET
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIRC_MRREJ-KMEIN_TARGET.
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_ROIRC_MRREJ_STR, 
GMMNR TYPE STRING,
ETMSTM TYPE STRING,
METEV TYPE STRING,
MATNR TYPE STRING,
MCOUNT TYPE STRING,
CONFAC TYPE STRING,
BASME TYPE STRING,
MENGE TYPE STRING,
XMCOUNT TYPE STRING,
XMATNR TYPE STRING,
XCONFAC TYPE STRING,
BUKRS TYPE STRING,
PARFN TYPE STRING,
FTMSTM TYPE STRING,
PARPOS TYPE STRING,
TTMSTM TYPE STRING,
METREV TYPE STRING,
SEQNR TYPE STRING,
PR_NUMBER TYPE STRING,
MRDATE TYPE STRING,
MRTIME TYPE STRING,
TIME_ZONE TYPE STRING,
SERVTYP TYPE STRING,
EQUNR TYPE STRING,
KBETR TYPE STRING,
KONWA TYPE STRING,
KPEIN TYPE STRING,
KMEIN TYPE STRING,
KWERT TYPE STRING,
XPARFN TYPE STRING,
XFTMSTM TYPE STRING,
XPARPOS TYPE STRING,
XTTMSTM TYPE STRING,
XSERVTYP TYPE STRING,
XKBETR TYPE STRING,
XKONWA TYPE STRING,
XKPEIN TYPE STRING,
XKMEIN TYPE STRING,
XKWERT TYPE STRING,
VKDAT TYPE STRING,
STATUS_UPDATE TYPE STRING,
LINKNR TYPE STRING,
ITLINKNR TYPE STRING,
LINKYEAR TYPE STRING,
KBETR_TARGET TYPE STRING,
KONWA_TARGET TYPE STRING,
KPEIN_TARGET TYPE STRING,
KMEIN_TARGET TYPE STRING,
ONLINE TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
MRDATE_TARGET TYPE STRING,
MRTIME_TARGET 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,
PROC_TYPE TYPE STRING,
TOL_STATUS TYPE STRING,
STCODE TYPE STRING,
BEZEI TYPE STRING,
BLOCK TYPE STRING,
BLOCK_RELEASE TYPE STRING,
USR_IND TYPE STRING,
MAKTX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIRC_MRREJ_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_ROIRC_MRREJ_STR-GMMNR sy-vline 
WA_ROIRC_MRREJ_STR-ETMSTM sy-vline 
WA_ROIRC_MRREJ_STR-METEV sy-vline 
WA_ROIRC_MRREJ_STR-MATNR sy-vline 
WA_ROIRC_MRREJ_STR-MCOUNT sy-vline 
WA_ROIRC_MRREJ_STR-CONFAC sy-vline 
WA_ROIRC_MRREJ_STR-BASME sy-vline 
WA_ROIRC_MRREJ_STR-MENGE sy-vline 
WA_ROIRC_MRREJ_STR-XMCOUNT sy-vline 
WA_ROIRC_MRREJ_STR-XMATNR sy-vline 
WA_ROIRC_MRREJ_STR-XCONFAC sy-vline 
WA_ROIRC_MRREJ_STR-BUKRS sy-vline 
WA_ROIRC_MRREJ_STR-PARFN sy-vline 
WA_ROIRC_MRREJ_STR-FTMSTM sy-vline 
WA_ROIRC_MRREJ_STR-PARPOS sy-vline 
WA_ROIRC_MRREJ_STR-TTMSTM sy-vline 
WA_ROIRC_MRREJ_STR-METREV sy-vline 
WA_ROIRC_MRREJ_STR-SEQNR sy-vline 
WA_ROIRC_MRREJ_STR-PR_NUMBER sy-vline 
WA_ROIRC_MRREJ_STR-MRDATE sy-vline 
WA_ROIRC_MRREJ_STR-MRTIME sy-vline 
WA_ROIRC_MRREJ_STR-TIME_ZONE sy-vline 
WA_ROIRC_MRREJ_STR-SERVTYP sy-vline 
WA_ROIRC_MRREJ_STR-EQUNR sy-vline 
WA_ROIRC_MRREJ_STR-KBETR sy-vline 
WA_ROIRC_MRREJ_STR-KONWA sy-vline 
WA_ROIRC_MRREJ_STR-KPEIN sy-vline 
WA_ROIRC_MRREJ_STR-KMEIN sy-vline 
WA_ROIRC_MRREJ_STR-KWERT sy-vline 
WA_ROIRC_MRREJ_STR-XPARFN sy-vline 
WA_ROIRC_MRREJ_STR-XFTMSTM sy-vline 
WA_ROIRC_MRREJ_STR-XPARPOS sy-vline 
WA_ROIRC_MRREJ_STR-XTTMSTM sy-vline 
WA_ROIRC_MRREJ_STR-XSERVTYP sy-vline 
WA_ROIRC_MRREJ_STR-XKBETR sy-vline 
WA_ROIRC_MRREJ_STR-XKONWA sy-vline 
WA_ROIRC_MRREJ_STR-XKPEIN sy-vline 
WA_ROIRC_MRREJ_STR-XKMEIN sy-vline 
WA_ROIRC_MRREJ_STR-XKWERT sy-vline 
WA_ROIRC_MRREJ_STR-VKDAT sy-vline 
WA_ROIRC_MRREJ_STR-STATUS_UPDATE sy-vline 
WA_ROIRC_MRREJ_STR-LINKNR sy-vline 
WA_ROIRC_MRREJ_STR-ITLINKNR sy-vline 
WA_ROIRC_MRREJ_STR-LINKYEAR sy-vline 
WA_ROIRC_MRREJ_STR-KBETR_TARGET sy-vline 
WA_ROIRC_MRREJ_STR-KONWA_TARGET sy-vline 
WA_ROIRC_MRREJ_STR-KPEIN_TARGET sy-vline 
WA_ROIRC_MRREJ_STR-KMEIN_TARGET sy-vline 
WA_ROIRC_MRREJ_STR-ONLINE sy-vline 
WA_ROIRC_MRREJ_STR-WERKS sy-vline 
WA_ROIRC_MRREJ_STR-LGORT sy-vline 
WA_ROIRC_MRREJ_STR-MRDATE_TARGET sy-vline 
WA_ROIRC_MRREJ_STR-MRTIME_TARGET sy-vline 
WA_ROIRC_MRREJ_STR-ERDAT sy-vline 
WA_ROIRC_MRREJ_STR-ERZEIT sy-vline 
WA_ROIRC_MRREJ_STR-ERNAM sy-vline 
WA_ROIRC_MRREJ_STR-AEDAT sy-vline 
WA_ROIRC_MRREJ_STR-AEZEIT sy-vline 
WA_ROIRC_MRREJ_STR-AENAM sy-vline 
WA_ROIRC_MRREJ_STR-BLOIND sy-vline 
WA_ROIRC_MRREJ_STR-DELIND sy-vline 
WA_ROIRC_MRREJ_STR-PROC_TYPE sy-vline 
WA_ROIRC_MRREJ_STR-TOL_STATUS sy-vline 
WA_ROIRC_MRREJ_STR-STCODE sy-vline 
WA_ROIRC_MRREJ_STR-BEZEI sy-vline 
WA_ROIRC_MRREJ_STR-BLOCK sy-vline 
WA_ROIRC_MRREJ_STR-BLOCK_RELEASE sy-vline 
WA_ROIRC_MRREJ_STR-USR_IND sy-vline 
WA_ROIRC_MRREJ_STR-MAKTX sy-vline      INTO ld_text SEPARATED BY SPACE.

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