ABAP Select data from SAP table EUI_SCREEN_DETAIL_T into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EUI_SCREEN_DETAIL_T
*  INTO TABLE @DATA(IT_EUI_SCREEN_DETAIL_T2).
*--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_EUI_SCREEN_DETAIL_T INDEX 1 INTO DATA(WA_EUI_SCREEN_DETAIL_T2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EUI_SCREEN_DETAIL_T>-SELECTED = 1.
<EUI_SCREEN_DETAIL_T>-UPDATED = 1.
<EUI_SCREEN_DETAIL_T>-LOGIKNR = 1.
<EUI_SCREEN_DETAIL_T>-LOGIKZW = 1.
<EUI_SCREEN_DETAIL_T>-MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EUI_SCREEN_DETAIL_T-GERAET, sy-vline,
  WA_EUI_SCREEN_DETAIL_T-EQUNR, sy-vline,
  WA_EUI_SCREEN_DETAIL_T-ZWNUMMER, sy-vline,
  WA_EUI_SCREEN_DETAIL_T-SPARTYP, sy-vline,
  WA_EUI_SCREEN_DETAIL_T-ZWKENN, sy-vline,
  WA_EUI_SCREEN_DETAIL_T-KENNZIFF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EUI_SCREEN_DETAIL_T 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_EUI_SCREEN_DETAIL_T 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_EUI_SCREEN_DETAIL_T INTO WA_EUI_SCREEN_DETAIL_T.


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

*Conversion exit GERNR, internal->external for field GERAET
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_EUI_SCREEN_DETAIL_T-GERAET
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EUI_SCREEN_DETAIL_T-GERAET.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit LUNIT, internal->external for field MEINS_ISU
CALL FUNCTION 'CONVERSION_EXIT_LUNIT_OUTPUT'
  EXPORTING
    input =                      WA_EUI_SCREEN_DETAIL_T-MEINS_ISU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EUI_SCREEN_DETAIL_T-MEINS_ISU.
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_EUI_SCREEN_DETAIL_T_STR, 
SELECTED TYPE STRING,
UPDATED TYPE STRING,
LOGIKNR TYPE STRING,
LOGIKZW TYPE STRING,
MATNR TYPE STRING,
GERAET TYPE STRING,
EQUNR TYPE STRING,
ZWNUMMER TYPE STRING,
SPARTYP TYPE STRING,
ZWKENN TYPE STRING,
KENNZIFF TYPE STRING,
ZWART TYPE STRING,
ZWFAKT TYPE STRING,
STANZVOR TYPE STRING,
STANZNAC TYPE STRING,
ZWTYP TYPE STRING,
BLIWIRK TYPE STRING,
MEINS_ISU 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,
BEGRU TYPE STRING,
LOEVM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EUI_SCREEN_DETAIL_T_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_EUI_SCREEN_DETAIL_T_STR-SELECTED sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-UPDATED sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-LOGIKNR sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-LOGIKZW sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-MATNR sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-GERAET sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-EQUNR sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-ZWNUMMER sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-SPARTYP sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-ZWKENN sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-KENNZIFF sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-ZWART sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-ZWFAKT sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-STANZVOR sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-STANZNAC sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-ZWTYP sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-BLIWIRK sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-MEINS_ISU sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-ANZERG sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-KZMESSW sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-UEBERVER sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-STEUERGRP sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-NABLESEN sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-PRUEFKL sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-TEMP_AREA sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-PR_AREA_AI sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-CALOR_AREA sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-HOEKORR sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-THGBER sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-KZAHLE sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-KZAHLT sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-GAS_PRS_AR sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-CRGPRESS sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-ERDAT sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-ERNAM sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-AEDAT sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-AENAM sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-BEGRU sy-vline 
WA_EUI_SCREEN_DETAIL_T_STR-LOEVM sy-vline      INTO ld_text SEPARATED BY SPACE.

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