ABAP Select data from SAP table RMQED into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMQED
*  INTO TABLE @DATA(IT_RMQED2).
*--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_RMQED INDEX 1 INTO DATA(WA_RMQED2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMQED>-DBS_STEUER = 1.
<RMQED>-DBS_FLAG = 1.
<RMQED>-DBS_EDUNK = 1.
<RMQED>-DBS_FDUNK = 1.
<RMQED>-DBS_NOERR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMQED-DBS_NOCHG, sy-vline,
  WA_RMQED-DBS_NOWRN, sy-vline,
  WA_RMQED-DBS_NOAUF, sy-vline,
  WA_RMQED-DBS_NOPLAN, sy-vline,
  WA_RMQED-CERT_REQ, sy-vline,
  WA_RMQED-STOCK_REQ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMQED 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_RMQED 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_RMQED INTO WA_RMQED.


*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_RMQED_STR, 
DBS_STEUER TYPE STRING,
DBS_FLAG TYPE STRING,
DBS_EDUNK TYPE STRING,
DBS_FDUNK TYPE STRING,
DBS_NOERR TYPE STRING,
DBS_NOCHG TYPE STRING,
DBS_NOWRN TYPE STRING,
DBS_NOAUF TYPE STRING,
DBS_NOPLAN TYPE STRING,
CERT_REQ TYPE STRING,
STOCK_REQ TYPE STRING,
QINF_UPD TYPE STRING,
DBS_SUBRC TYPE STRING,
DBS_PLANZUO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMQED_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_RMQED_STR-DBS_STEUER sy-vline 
WA_RMQED_STR-DBS_FLAG sy-vline 
WA_RMQED_STR-DBS_EDUNK sy-vline 
WA_RMQED_STR-DBS_FDUNK sy-vline 
WA_RMQED_STR-DBS_NOERR sy-vline 
WA_RMQED_STR-DBS_NOCHG sy-vline 
WA_RMQED_STR-DBS_NOWRN sy-vline 
WA_RMQED_STR-DBS_NOAUF sy-vline 
WA_RMQED_STR-DBS_NOPLAN sy-vline 
WA_RMQED_STR-CERT_REQ sy-vline 
WA_RMQED_STR-STOCK_REQ sy-vline 
WA_RMQED_STR-QINF_UPD sy-vline 
WA_RMQED_STR-DBS_SUBRC sy-vline 
WA_RMQED_STR-DBS_PLANZUO sy-vline      INTO ld_text SEPARATED BY SPACE.

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