ABAP Select data from SAP table RMQSC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMQSC
*  INTO TABLE @DATA(IT_RMQSC2).
*--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_RMQSC INDEX 1 INTO DATA(WA_RMQSC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMQSC>-WSPR = 1.
<RMQSC>-KZKLASS = 1.
<RMQSC>-KZDOK = 1.
<RMQSC>-KZ_TXT_AEN = 1.
<RMQSC>-REF_PMTNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMQSC-REF_VERSNR, sy-vline,
  WA_RMQSC-REF_WERKS, sy-vline,
  WA_RMQSC-REF_GUELT, sy-vline,
  WA_RMQSC-GUELTIGAM, sy-vline,
  WA_RMQSC-WERKS_VON, sy-vline,
  WA_RMQSC-WERKS_BIS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMQSC 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_RMQSC 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_RMQSC INTO WA_RMQSC.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMQSC-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMQSC-AENNR.
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_RMQSC_STR, 
WSPR TYPE STRING,
KZKLASS TYPE STRING,
KZDOK TYPE STRING,
KZ_TXT_AEN TYPE STRING,
REF_PMTNR TYPE STRING,
REF_VERSNR TYPE STRING,
REF_WERKS TYPE STRING,
REF_GUELT TYPE STRING,
GUELTIGAM TYPE STRING,
WERKS_VON TYPE STRING,
WERKS_BIS TYPE STRING,
METHODEVON TYPE STRING,
METHODEBIS TYPE STRING,
VERSION TYPE STRING,
GUELTIGAB TYPE STRING,
VORLAGE TYPE STRING,
KZABBR TYPE STRING,
KZLOESCH TYPE STRING,
KZDATEN TYPE STRING,
STATUSTEXT TYPE STRING,
AENNR TYPE STRING,
ARGUMENT TYPE STRING,
GESAMT TYPE STRING,
QMASTMOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMQSC_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_RMQSC_STR-WSPR sy-vline 
WA_RMQSC_STR-KZKLASS sy-vline 
WA_RMQSC_STR-KZDOK sy-vline 
WA_RMQSC_STR-KZ_TXT_AEN sy-vline 
WA_RMQSC_STR-REF_PMTNR sy-vline 
WA_RMQSC_STR-REF_VERSNR sy-vline 
WA_RMQSC_STR-REF_WERKS sy-vline 
WA_RMQSC_STR-REF_GUELT sy-vline 
WA_RMQSC_STR-GUELTIGAM sy-vline 
WA_RMQSC_STR-WERKS_VON sy-vline 
WA_RMQSC_STR-WERKS_BIS sy-vline 
WA_RMQSC_STR-METHODEVON sy-vline 
WA_RMQSC_STR-METHODEBIS sy-vline 
WA_RMQSC_STR-VERSION sy-vline 
WA_RMQSC_STR-GUELTIGAB sy-vline 
WA_RMQSC_STR-VORLAGE sy-vline 
WA_RMQSC_STR-KZABBR sy-vline 
WA_RMQSC_STR-KZLOESCH sy-vline 
WA_RMQSC_STR-KZDATEN sy-vline 
WA_RMQSC_STR-STATUSTEXT sy-vline 
WA_RMQSC_STR-AENNR sy-vline 
WA_RMQSC_STR-ARGUMENT sy-vline 
WA_RMQSC_STR-GESAMT sy-vline 
WA_RMQSC_STR-QMASTMOD sy-vline      INTO ld_text SEPARATED BY SPACE.

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