ABAP Select data from SAP table /SAPAPO/DC_DT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/DC_DT
*  INTO TABLE @DATA(IT_/SAPAPO/DC_DT2).
*--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_/SAPAPO/DC_DT INDEX 1 INTO DATA(WA_/SAPAPO/DC_DT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/DC_DT>-AKTIVITAETEN = 1.
</SAPAPO/DC_DT>-ALERT = 1.
</SAPAPO/DC_DT>-BEDINGUNG = 1.
</SAPAPO/DC_DT>-BEDINGUNGEN = 1.
</SAPAPO/DC_DT>-BEZEICHNUNG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/DC_DT-DC, sy-vline,
  WA_/SAPAPO/DC_DT-DNMG, sy-vline,
  WA_/SAPAPO/DC_DT-EBN, sy-vline,
  WA_/SAPAPO/DC_DT-E_BAUM, sy-vline,
  WA_/SAPAPO/DC_DT-E_BAEUME, sy-vline,
  WA_/SAPAPO/DC_DT-EBB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/DC_DT 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_/SAPAPO/DC_DT 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_/SAPAPO/DC_DT INTO WA_/SAPAPO/DC_DT.


*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_/SAPAPO/DC_DT_STR, 
AKTIVITAETEN TYPE STRING,
ALERT TYPE STRING,
BEDINGUNG TYPE STRING,
BEDINGUNGEN TYPE STRING,
BEZEICHNUNG TYPE STRING,
DC TYPE STRING,
DNMG TYPE STRING,
EBN TYPE STRING,
E_BAUM TYPE STRING,
E_BAEUME TYPE STRING,
EBB TYPE STRING,
ENA TYPE STRING,
ENDE TYPE STRING,
GRAPHIKANZEIGE TYPE STRING,
HORIZONT TYPE STRING,
IEB TYPE STRING,
IP TYPE STRING,
IPL TYPE STRING,
KNOTENDEFINITION TYPE STRING,
KUMHORIZONT TYPE STRING,
LAYOUT TYPE STRING,
MERKMALE TYPE STRING,
MERKMALSGRUPPE TYPE STRING,
MERKMALSGRUPPEN TYPE STRING,
MERKMALSWERTE TYPE STRING,
NA TYPE STRING,
NB TYPE STRING,
NMG TYPE STRING,
NP TYPE STRING,
PARAMETER TYPE STRING,
PW TYPE STRING,
PBV TYPE STRING,
PEB TYPE STRING,
RIP TYPE STRING,
SELID TYPE STRING,
STAMMDATEN TYPE STRING,
START TYPE STRING,
S1 TYPE STRING,
S2 TYPE STRING,
S3 TYPE STRING,
VEB TYPE STRING,
VERBINDUNGEN TYPE STRING,
VERSION TYPE STRING,
VOREINSTELLUNG TYPE STRING,
V1 TYPE STRING,
V2 TYPE STRING,
WEB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/DC_DT_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_/SAPAPO/DC_DT_STR-AKTIVITAETEN sy-vline 
WA_/SAPAPO/DC_DT_STR-ALERT sy-vline 
WA_/SAPAPO/DC_DT_STR-BEDINGUNG sy-vline 
WA_/SAPAPO/DC_DT_STR-BEDINGUNGEN sy-vline 
WA_/SAPAPO/DC_DT_STR-BEZEICHNUNG sy-vline 
WA_/SAPAPO/DC_DT_STR-DC sy-vline 
WA_/SAPAPO/DC_DT_STR-DNMG sy-vline 
WA_/SAPAPO/DC_DT_STR-EBN sy-vline 
WA_/SAPAPO/DC_DT_STR-E_BAUM sy-vline 
WA_/SAPAPO/DC_DT_STR-E_BAEUME sy-vline 
WA_/SAPAPO/DC_DT_STR-EBB sy-vline 
WA_/SAPAPO/DC_DT_STR-ENA sy-vline 
WA_/SAPAPO/DC_DT_STR-ENDE sy-vline 
WA_/SAPAPO/DC_DT_STR-GRAPHIKANZEIGE sy-vline 
WA_/SAPAPO/DC_DT_STR-HORIZONT sy-vline 
WA_/SAPAPO/DC_DT_STR-IEB sy-vline 
WA_/SAPAPO/DC_DT_STR-IP sy-vline 
WA_/SAPAPO/DC_DT_STR-IPL sy-vline 
WA_/SAPAPO/DC_DT_STR-KNOTENDEFINITION sy-vline 
WA_/SAPAPO/DC_DT_STR-KUMHORIZONT sy-vline 
WA_/SAPAPO/DC_DT_STR-LAYOUT sy-vline 
WA_/SAPAPO/DC_DT_STR-MERKMALE sy-vline 
WA_/SAPAPO/DC_DT_STR-MERKMALSGRUPPE sy-vline 
WA_/SAPAPO/DC_DT_STR-MERKMALSGRUPPEN sy-vline 
WA_/SAPAPO/DC_DT_STR-MERKMALSWERTE sy-vline 
WA_/SAPAPO/DC_DT_STR-NA sy-vline 
WA_/SAPAPO/DC_DT_STR-NB sy-vline 
WA_/SAPAPO/DC_DT_STR-NMG sy-vline 
WA_/SAPAPO/DC_DT_STR-NP sy-vline 
WA_/SAPAPO/DC_DT_STR-PARAMETER sy-vline 
WA_/SAPAPO/DC_DT_STR-PW sy-vline 
WA_/SAPAPO/DC_DT_STR-PBV sy-vline 
WA_/SAPAPO/DC_DT_STR-PEB sy-vline 
WA_/SAPAPO/DC_DT_STR-RIP sy-vline 
WA_/SAPAPO/DC_DT_STR-SELID sy-vline 
WA_/SAPAPO/DC_DT_STR-STAMMDATEN sy-vline 
WA_/SAPAPO/DC_DT_STR-START sy-vline 
WA_/SAPAPO/DC_DT_STR-S1 sy-vline 
WA_/SAPAPO/DC_DT_STR-S2 sy-vline 
WA_/SAPAPO/DC_DT_STR-S3 sy-vline 
WA_/SAPAPO/DC_DT_STR-VEB sy-vline 
WA_/SAPAPO/DC_DT_STR-VERBINDUNGEN sy-vline 
WA_/SAPAPO/DC_DT_STR-VERSION sy-vline 
WA_/SAPAPO/DC_DT_STR-VOREINSTELLUNG sy-vline 
WA_/SAPAPO/DC_DT_STR-V1 sy-vline 
WA_/SAPAPO/DC_DT_STR-V2 sy-vline 
WA_/SAPAPO/DC_DT_STR-WEB sy-vline      INTO ld_text SEPARATED BY SPACE.

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