ABAP Select data from SAP table EISU_IL_MD_REGISTER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EISU_IL_MD_REGISTER
*  INTO TABLE @DATA(IT_EISU_IL_MD_REGISTER2).
*--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_EISU_IL_MD_REGISTER INDEX 1 INTO DATA(WA_EISU_IL_MD_REGISTER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EISU_IL_MD_REGISTER>-MANDT = 1.
<EISU_IL_MD_REGISTER>-EQUNR = 1.
<EISU_IL_MD_REGISTER>-ZWNUMMER = 1.
<EISU_IL_MD_REGISTER>-SPARTYP = 1.
<EISU_IL_MD_REGISTER>-SPARTYPTXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EISU_IL_MD_REGISTER-SUCHBEG, sy-vline,
  WA_EISU_IL_MD_REGISTER-SUCHBEGTXT, sy-vline,
  WA_EISU_IL_MD_REGISTER-EZWG_INFO, sy-vline,
  WA_EISU_IL_MD_REGISTER-INTSIZEID, sy-vline,
  WA_EISU_IL_MD_REGISTER-BIS, sy-vline,
  WA_EISU_IL_MD_REGISTER-AB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EISU_IL_MD_REGISTER 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_EISU_IL_MD_REGISTER 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_EISU_IL_MD_REGISTER INTO WA_EISU_IL_MD_REGISTER.


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

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

*Conversion exit CUNIT, internal->external for field MASSBILL
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_EISU_IL_MD_REGISTER-MASSBILL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EISU_IL_MD_REGISTER-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_EISU_IL_MD_REGISTER_STR, 
MANDT TYPE STRING,
EQUNR TYPE STRING,
ZWNUMMER TYPE STRING,
SPARTYP TYPE STRING,
SPARTYPTXT TYPE STRING,
SUCHBEG TYPE STRING,
SUCHBEGTXT TYPE STRING,
EZWG_INFO TYPE STRING,
INTSIZEID TYPE STRING,
BIS TYPE STRING,
AB TYPE STRING,
LOGIKZW TYPE STRING,
ZWKENN TYPE STRING,
KENNZIFF TYPE STRING,
ZWART TYPE STRING,
ZWARTTXT TYPE STRING,
ZWFAKT TYPE STRING,
STANZVOR TYPE STRING,
STANZNAC TYPE STRING,
ZWTYP TYPE STRING,
ZWTYPTXT TYPE STRING,
BLIWIRK TYPE STRING,
MASSREAD TYPE STRING,
ANZERG TYPE STRING,
KZMESSW TYPE STRING,
UEBERVER TYPE STRING,
STEUERGRP TYPE STRING,
NABLESEN TYPE STRING,
PRUEFKL TYPE STRING,
TEMP_AREA TYPE STRING,
PR_AREA_AI TYPE STRING,
CALOR_AREA TYPE STRING,
HOEKORR TYPE STRING,
THGBER TYPE STRING,
KZAHLE TYPE STRING,
KZAHLT TYPE STRING,
GAS_PRS_AR TYPE STRING,
CRGPRESS TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
MASSBILL TYPE STRING,
GEWKEY TYPE STRING,
ZSPANNS TYPE STRING,
ZSTROMS TYPE STRING,
ZSPANNP TYPE STRING,
ZSTROMP TYPE STRING,
TOUPERIOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EISU_IL_MD_REGISTER_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_EISU_IL_MD_REGISTER_STR-MANDT sy-vline 
WA_EISU_IL_MD_REGISTER_STR-EQUNR sy-vline 
WA_EISU_IL_MD_REGISTER_STR-ZWNUMMER sy-vline 
WA_EISU_IL_MD_REGISTER_STR-SPARTYP sy-vline 
WA_EISU_IL_MD_REGISTER_STR-SPARTYPTXT sy-vline 
WA_EISU_IL_MD_REGISTER_STR-SUCHBEG sy-vline 
WA_EISU_IL_MD_REGISTER_STR-SUCHBEGTXT sy-vline 
WA_EISU_IL_MD_REGISTER_STR-EZWG_INFO sy-vline 
WA_EISU_IL_MD_REGISTER_STR-INTSIZEID sy-vline 
WA_EISU_IL_MD_REGISTER_STR-BIS sy-vline 
WA_EISU_IL_MD_REGISTER_STR-AB sy-vline 
WA_EISU_IL_MD_REGISTER_STR-LOGIKZW sy-vline 
WA_EISU_IL_MD_REGISTER_STR-ZWKENN sy-vline 
WA_EISU_IL_MD_REGISTER_STR-KENNZIFF sy-vline 
WA_EISU_IL_MD_REGISTER_STR-ZWART sy-vline 
WA_EISU_IL_MD_REGISTER_STR-ZWARTTXT sy-vline 
WA_EISU_IL_MD_REGISTER_STR-ZWFAKT sy-vline 
WA_EISU_IL_MD_REGISTER_STR-STANZVOR sy-vline 
WA_EISU_IL_MD_REGISTER_STR-STANZNAC sy-vline 
WA_EISU_IL_MD_REGISTER_STR-ZWTYP sy-vline 
WA_EISU_IL_MD_REGISTER_STR-ZWTYPTXT sy-vline 
WA_EISU_IL_MD_REGISTER_STR-BLIWIRK sy-vline 
WA_EISU_IL_MD_REGISTER_STR-MASSREAD sy-vline 
WA_EISU_IL_MD_REGISTER_STR-ANZERG sy-vline 
WA_EISU_IL_MD_REGISTER_STR-KZMESSW sy-vline 
WA_EISU_IL_MD_REGISTER_STR-UEBERVER sy-vline 
WA_EISU_IL_MD_REGISTER_STR-STEUERGRP sy-vline 
WA_EISU_IL_MD_REGISTER_STR-NABLESEN sy-vline 
WA_EISU_IL_MD_REGISTER_STR-PRUEFKL sy-vline 
WA_EISU_IL_MD_REGISTER_STR-TEMP_AREA sy-vline 
WA_EISU_IL_MD_REGISTER_STR-PR_AREA_AI sy-vline 
WA_EISU_IL_MD_REGISTER_STR-CALOR_AREA sy-vline 
WA_EISU_IL_MD_REGISTER_STR-HOEKORR sy-vline 
WA_EISU_IL_MD_REGISTER_STR-THGBER sy-vline 
WA_EISU_IL_MD_REGISTER_STR-KZAHLE sy-vline 
WA_EISU_IL_MD_REGISTER_STR-KZAHLT sy-vline 
WA_EISU_IL_MD_REGISTER_STR-GAS_PRS_AR sy-vline 
WA_EISU_IL_MD_REGISTER_STR-CRGPRESS sy-vline 
WA_EISU_IL_MD_REGISTER_STR-ERDAT sy-vline 
WA_EISU_IL_MD_REGISTER_STR-ERNAM sy-vline 
WA_EISU_IL_MD_REGISTER_STR-AEDAT sy-vline 
WA_EISU_IL_MD_REGISTER_STR-AENAM sy-vline 
WA_EISU_IL_MD_REGISTER_STR-MASSBILL sy-vline 
WA_EISU_IL_MD_REGISTER_STR-GEWKEY sy-vline 
WA_EISU_IL_MD_REGISTER_STR-ZSPANNS sy-vline 
WA_EISU_IL_MD_REGISTER_STR-ZSTROMS sy-vline 
WA_EISU_IL_MD_REGISTER_STR-ZSPANNP sy-vline 
WA_EISU_IL_MD_REGISTER_STR-ZSTROMP sy-vline 
WA_EISU_IL_MD_REGISTER_STR-TOUPERIOD sy-vline      INTO ld_text SEPARATED BY SPACE.

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