ABAP Select data from SAP table /MISU/MD_REGISTER_ENTITY_STR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /MISU/MD_REGISTER_ENTITY_STR 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 /MISU/MD_REGISTER_ENTITY_STR. 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 /MISU/MD_REGISTER_ENTITY_STR 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_/MISU/MD_REGISTER_ENTITY_STR TYPE STANDARD TABLE OF /MISU/MD_REGISTER_ENTITY_STR,
      WA_/MISU/MD_REGISTER_ENTITY_STR TYPE /MISU/MD_REGISTER_ENTITY_STR,
      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: </MISU/MD_REGISTER_ENTITY_STR> TYPE /MISU/MD_REGISTER_ENTITY_STR.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /MISU/MD_REGISTER_ENTITY_STR
  INTO TABLE IT_/MISU/MD_REGISTER_ENTITY_STR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /MISU/MD_REGISTER_ENTITY_STR
*  INTO TABLE @DATA(IT_/MISU/MD_REGISTER_ENTITY_STR2).
*--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_/MISU/MD_REGISTER_ENTITY_STR INDEX 1 INTO DATA(WA_/MISU/MD_REGISTER_ENTITY_STR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/MISU/MD_REGISTER_ENTITY_STR ASSIGNING </MISU/MD_REGISTER_ENTITY_STR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</MISU/MD_REGISTER_ENTITY_STR>-MANDT = 1.
</MISU/MD_REGISTER_ENTITY_STR>-ZWGRUPPE = 1.
</MISU/MD_REGISTER_ENTITY_STR>-ZWNUMMER = 1.
</MISU/MD_REGISTER_ENTITY_STR>-LOESCHVM = 1.
</MISU/MD_REGISTER_ENTITY_STR>-BEGRU = 1.

ENDLOOP.

LOOP AT IT_/MISU/MD_REGISTER_ENTITY_STR INTO WA_/MISU/MD_REGISTER_ENTITY_STR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/MISU/MD_REGISTER_ENTITY_STR-SPARTYP, sy-vline,
  WA_/MISU/MD_REGISTER_ENTITY_STR-ZWART, sy-vline,
  WA_/MISU/MD_REGISTER_ENTITY_STR-BLIWIRK, sy-vline,
  WA_/MISU/MD_REGISTER_ENTITY_STR-ZWTYP, sy-vline,
  WA_/MISU/MD_REGISTER_ENTITY_STR-STANZVOR, sy-vline,
  WA_/MISU/MD_REGISTER_ENTITY_STR-STANZNAC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/MISU/MD_REGISTER_ENTITY_STR 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_/MISU/MD_REGISTER_ENTITY_STR 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_/MISU/MD_REGISTER_ENTITY_STR INTO WA_/MISU/MD_REGISTER_ENTITY_STR.


*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 ZWGRUPPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MISU/MD_REGISTER_ENTITY_STR-ZWGRUPPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MISU/MD_REGISTER_ENTITY_STR-ZWGRUPPE.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MASSBILL
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/MISU/MD_REGISTER_ENTITY_STR-MASSBILL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MISU/MD_REGISTER_ENTITY_STR-MASSBILL.
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_/MISU/MD_REGISTER_ENTITY_STR_STR, 
MANDT TYPE STRING,
ZWGRUPPE TYPE STRING,
ZWNUMMER TYPE STRING,
LOESCHVM TYPE STRING,
BEGRU TYPE STRING,
SPARTYP TYPE STRING,
ZWART TYPE STRING,
BLIWIRK TYPE STRING,
ZWTYP TYPE STRING,
STANZVOR TYPE STRING,
STANZNAC TYPE STRING,
ZWFAKT TYPE STRING,
MASSREAD TYPE STRING,
THGBER TYPE STRING,
ZWKENN TYPE STRING,
UEBERVER TYPE STRING,
ZSPANNP TYPE STRING,
ZSPANNS TYPE STRING,
ZSTROMP TYPE STRING,
ZSTROMS TYPE STRING,
ANZERG TYPE STRING,
ZWNABR TYPE STRING,
ANZART TYPE STRING,
KENNZIFF TYPE STRING,
SUCHBEG TYPE STRING,
ZWINFO TYPE STRING,
KZMESSW TYPE STRING,
STEUERGRP TYPE STRING,
KZDEFAULT TYPE STRING,
PRUEFKL TYPE STRING,
NABLESEN TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
MASSBILL TYPE STRING,
GEWKEY TYPE STRING,
INTSIZEID TYPE STRING,
TOUPERIOD TYPE STRING,
VEE_CODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/MISU/MD_REGISTER_ENTITY_STR_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_/MISU/MD_REGISTER_ENTITY_STR_STR-MANDT sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-ZWGRUPPE sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-ZWNUMMER sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-LOESCHVM sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-BEGRU sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-SPARTYP sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-ZWART sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-BLIWIRK sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-ZWTYP sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-STANZVOR sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-STANZNAC sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-ZWFAKT sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-MASSREAD sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-THGBER sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-ZWKENN sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-UEBERVER sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-ZSPANNP sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-ZSPANNS sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-ZSTROMP sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-ZSTROMS sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-ANZERG sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-ZWNABR sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-ANZART sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-KENNZIFF sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-SUCHBEG sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-ZWINFO sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-KZMESSW sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-STEUERGRP sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-KZDEFAULT sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-PRUEFKL sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-NABLESEN sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-ERDAT sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-ERNAM sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-AEDAT sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-AENAM sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-MASSBILL sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-GEWKEY sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-INTSIZEID sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-TOUPERIOD sy-vline 
WA_/MISU/MD_REGISTER_ENTITY_STR_STR-VEE_CODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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