ABAP Select data from SAP table DISPLAY_TE420 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DISPLAY_TE420 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 DISPLAY_TE420. 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 DISPLAY_TE420 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_DISPLAY_TE420 TYPE STANDARD TABLE OF DISPLAY_TE420,
      WA_DISPLAY_TE420 TYPE DISPLAY_TE420,
      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: <DISPLAY_TE420> TYPE DISPLAY_TE420.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DISPLAY_TE420.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DISPLAY_TE420
  INTO TABLE IT_DISPLAY_TE420.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DISPLAY_TE420
*  INTO TABLE @DATA(IT_DISPLAY_TE4202).
*--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_DISPLAY_TE420 INDEX 1 INTO DATA(WA_DISPLAY_TE4202).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DISPLAY_TE420 ASSIGNING <DISPLAY_TE420>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DISPLAY_TE420>-MANDT = 1.
<DISPLAY_TE420>-TERMSCHL = 1.
<DISPLAY_TE420>-TERMTEXT = 1.
<DISPLAY_TE420>-TERMERST = 1.
<DISPLAY_TE420>-ABRDATS = 1.

ENDLOOP.

LOOP AT IT_DISPLAY_TE420 INTO WA_DISPLAY_TE420.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DISPLAY_TE420-PERIODEW, sy-vline,
  WA_DISPLAY_TE420-PERIODET, sy-vline,
  WA_DISPLAY_TE420-ZUORDDAT, sy-vline,
  WA_DISPLAY_TE420-ZLEISTE, sy-vline,
  WA_DISPLAY_TE420-JAHRESZAHL, sy-vline,
  WA_DISPLAY_TE420-ZULTERM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DISPLAY_TE420 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_DISPLAY_TE420 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_DISPLAY_TE420 INTO WA_DISPLAY_TE420.


*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_DISPLAY_TE420_STR, 
MANDT TYPE STRING,
TERMSCHL TYPE STRING,
TERMTEXT TYPE STRING,
TERMERST TYPE STRING,
ABRDATS TYPE STRING,
PERIODEW TYPE STRING,
PERIODET TYPE STRING,
ZUORDDAT TYPE STRING,
ZLEISTE TYPE STRING,
JAHRESZAHL TYPE STRING,
ZULTERM TYPE STRING,
ABSZYK TYPE STRING,
THGDAT TYPE STRING,
DATUMDF TYPE STRING,
MSPABPLF TYPE STRING,
KABSPERA TYPE STRING,
EROEDAT TYPE STRING,
ERNAM TYPE STRING,
AENDDATE TYPE STRING,
AENDNAM TYPE STRING,
VERTRKL1 TYPE STRING,
SPARTENTY1 TYPE STRING,
VERTRKL2 TYPE STRING,
SPARTENTY2 TYPE STRING,
VERTRKL3 TYPE STRING,
SPARTENTY3 TYPE STRING,
VERTRKL4 TYPE STRING,
SPARTENTY4 TYPE STRING,
VERTRKL5 TYPE STRING,
SPARTENTY5 TYPE STRING,
ABSZYKTER1 TYPE STRING,
ANZFAELL1 TYPE STRING,
ABSZYKTER2 TYPE STRING,
ANZFAELL2 TYPE STRING,
ABSZYKTER3 TYPE STRING,
ANZFAELL3 TYPE STRING,
ABSZYKTER4 TYPE STRING,
ANZFAELL4 TYPE STRING,
ABSZYKTER5 TYPE STRING,
ANZFAELL5 TYPE STRING,
PARASATZ TYPE STRING,
IDENT TYPE STRING,
SAPKAL TYPE STRING,
PTOLERFROM TYPE STRING,
PTOLERTO TYPE STRING,
ABRABS TYPE STRING,
TS_DYN TYPE STRING,
PERIODED TYPE STRING,
WORK_DAY TYPE STRING,
BEGRU TYPE STRING,
EXTRAPOLWASTE TYPE STRING,
INTCNTRTYPE TYPE STRING,
ABSZYKTER6 TYPE STRING,
ANZFAELL6 TYPE STRING,
BOX TYPE STRING,
DELETED TYPE STRING,
PAGNO TYPE STRING,
LINNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DISPLAY_TE420_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_DISPLAY_TE420_STR-MANDT sy-vline 
WA_DISPLAY_TE420_STR-TERMSCHL sy-vline 
WA_DISPLAY_TE420_STR-TERMTEXT sy-vline 
WA_DISPLAY_TE420_STR-TERMERST sy-vline 
WA_DISPLAY_TE420_STR-ABRDATS sy-vline 
WA_DISPLAY_TE420_STR-PERIODEW sy-vline 
WA_DISPLAY_TE420_STR-PERIODET sy-vline 
WA_DISPLAY_TE420_STR-ZUORDDAT sy-vline 
WA_DISPLAY_TE420_STR-ZLEISTE sy-vline 
WA_DISPLAY_TE420_STR-JAHRESZAHL sy-vline 
WA_DISPLAY_TE420_STR-ZULTERM sy-vline 
WA_DISPLAY_TE420_STR-ABSZYK sy-vline 
WA_DISPLAY_TE420_STR-THGDAT sy-vline 
WA_DISPLAY_TE420_STR-DATUMDF sy-vline 
WA_DISPLAY_TE420_STR-MSPABPLF sy-vline 
WA_DISPLAY_TE420_STR-KABSPERA sy-vline 
WA_DISPLAY_TE420_STR-EROEDAT sy-vline 
WA_DISPLAY_TE420_STR-ERNAM sy-vline 
WA_DISPLAY_TE420_STR-AENDDATE sy-vline 
WA_DISPLAY_TE420_STR-AENDNAM sy-vline 
WA_DISPLAY_TE420_STR-VERTRKL1 sy-vline 
WA_DISPLAY_TE420_STR-SPARTENTY1 sy-vline 
WA_DISPLAY_TE420_STR-VERTRKL2 sy-vline 
WA_DISPLAY_TE420_STR-SPARTENTY2 sy-vline 
WA_DISPLAY_TE420_STR-VERTRKL3 sy-vline 
WA_DISPLAY_TE420_STR-SPARTENTY3 sy-vline 
WA_DISPLAY_TE420_STR-VERTRKL4 sy-vline 
WA_DISPLAY_TE420_STR-SPARTENTY4 sy-vline 
WA_DISPLAY_TE420_STR-VERTRKL5 sy-vline 
WA_DISPLAY_TE420_STR-SPARTENTY5 sy-vline 
WA_DISPLAY_TE420_STR-ABSZYKTER1 sy-vline 
WA_DISPLAY_TE420_STR-ANZFAELL1 sy-vline 
WA_DISPLAY_TE420_STR-ABSZYKTER2 sy-vline 
WA_DISPLAY_TE420_STR-ANZFAELL2 sy-vline 
WA_DISPLAY_TE420_STR-ABSZYKTER3 sy-vline 
WA_DISPLAY_TE420_STR-ANZFAELL3 sy-vline 
WA_DISPLAY_TE420_STR-ABSZYKTER4 sy-vline 
WA_DISPLAY_TE420_STR-ANZFAELL4 sy-vline 
WA_DISPLAY_TE420_STR-ABSZYKTER5 sy-vline 
WA_DISPLAY_TE420_STR-ANZFAELL5 sy-vline 
WA_DISPLAY_TE420_STR-PARASATZ sy-vline 
WA_DISPLAY_TE420_STR-IDENT sy-vline 
WA_DISPLAY_TE420_STR-SAPKAL sy-vline 
WA_DISPLAY_TE420_STR-PTOLERFROM sy-vline 
WA_DISPLAY_TE420_STR-PTOLERTO sy-vline 
WA_DISPLAY_TE420_STR-ABRABS sy-vline 
WA_DISPLAY_TE420_STR-TS_DYN sy-vline 
WA_DISPLAY_TE420_STR-PERIODED sy-vline 
WA_DISPLAY_TE420_STR-WORK_DAY sy-vline 
WA_DISPLAY_TE420_STR-BEGRU sy-vline 
WA_DISPLAY_TE420_STR-EXTRAPOLWASTE sy-vline 
WA_DISPLAY_TE420_STR-INTCNTRTYPE sy-vline 
WA_DISPLAY_TE420_STR-ABSZYKTER6 sy-vline 
WA_DISPLAY_TE420_STR-ANZFAELL6 sy-vline 
WA_DISPLAY_TE420_STR-BOX sy-vline 
WA_DISPLAY_TE420_STR-DELETED sy-vline 
WA_DISPLAY_TE420_STR-PAGNO sy-vline 
WA_DISPLAY_TE420_STR-LINNO sy-vline      INTO ld_text SEPARATED BY SPACE.

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