ABAP Select data from SAP table TTEPDT_DOCUMENT_COM_ST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TTEPDT_DOCUMENT_COM_ST
*  INTO TABLE @DATA(IT_TTEPDT_DOCUMENT_COM_ST2).
*--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_TTEPDT_DOCUMENT_COM_ST INDEX 1 INTO DATA(WA_TTEPDT_DOCUMENT_COM_ST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TTEPDT_DOCUMENT_COM_ST>-TTEDOCUMENTID = 1.
<TTEPDT_DOCUMENT_COM_ST>-REFTOORIGINAL = 1.
<TTEPDT_DOCUMENT_COM_ST>-OBJ_SYS = 1.
<TTEPDT_DOCUMENT_COM_ST>-OBJ_TYPE = 1.
<TTEPDT_DOCUMENT_COM_ST>-OBJ_KEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TTEPDT_DOCUMENT_COM_ST-REFTTEDOCUMENTID, sy-vline,
  WA_TTEPDT_DOCUMENT_COM_ST-CREA_USER, sy-vline,
  WA_TTEPDT_DOCUMENT_COM_ST-CREA_DATE, sy-vline,
  WA_TTEPDT_DOCUMENT_COM_ST-CREA_TIME, sy-vline,
  WA_TTEPDT_DOCUMENT_COM_ST-CHNG_USER, sy-vline,
  WA_TTEPDT_DOCUMENT_COM_ST-CHNG_DATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TTEPDT_DOCUMENT_COM_ST 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_TTEPDT_DOCUMENT_COM_ST 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_TTEPDT_DOCUMENT_COM_ST INTO WA_TTEPDT_DOCUMENT_COM_ST.


*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 OBJ_SYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TTEPDT_DOCUMENT_COM_ST-OBJ_SYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TTEPDT_DOCUMENT_COM_ST-OBJ_SYS.
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_TTEPDT_DOCUMENT_COM_ST_STR, 
TTEDOCUMENTID TYPE STRING,
REFTOORIGINAL TYPE STRING,
OBJ_SYS TYPE STRING,
OBJ_TYPE TYPE STRING,
OBJ_KEY TYPE STRING,
REFTTEDOCUMENTID TYPE STRING,
CREA_USER TYPE STRING,
CREA_DATE TYPE STRING,
CREA_TIME TYPE STRING,
CHNG_USER TYPE STRING,
CHNG_DATE TYPE STRING,
CHNG_TIME TYPE STRING,
DESCRIPTION1 TYPE STRING,
DESCRIPTION2 TYPE STRING,
GROUPCODE TYPE STRING,
CALLTTE_TIME TYPE STRING,
RFC_SUBRC TYPE STRING,
SERVER TYPE STRING,
OUTDOC TYPE STRING,
CALLING_DATE TYPE STRING,
CALLING_TIME TYPE STRING,
LAST_POSNR TYPE STRING,
LAST_PRPOSNR TYPE STRING,
LAST_BPPOSNR TYPE STRING,
DOCCREATED TYPE STRING,
ARCHIVED TYPE STRING,
USDOC TYPE STRING,
TABLEBITS TYPE STRING,
REPDATE TYPE STRING,
CONVDATE TYPE STRING,
TTEVERSION TYPE STRING,
XCLASTER TYPE STRING,
PRIDOCGUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TTEPDT_DOCUMENT_COM_ST_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_TTEPDT_DOCUMENT_COM_ST_STR-TTEDOCUMENTID sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-REFTOORIGINAL sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-OBJ_SYS sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-OBJ_TYPE sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-OBJ_KEY sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-REFTTEDOCUMENTID sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-CREA_USER sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-CREA_DATE sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-CREA_TIME sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-CHNG_USER sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-CHNG_DATE sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-CHNG_TIME sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-DESCRIPTION1 sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-DESCRIPTION2 sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-GROUPCODE sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-CALLTTE_TIME sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-RFC_SUBRC sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-SERVER sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-OUTDOC sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-CALLING_DATE sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-CALLING_TIME sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-LAST_POSNR sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-LAST_PRPOSNR sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-LAST_BPPOSNR sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-DOCCREATED sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-ARCHIVED sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-USDOC sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-TABLEBITS sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-REPDATE sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-CONVDATE sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-TTEVERSION sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-XCLASTER sy-vline 
WA_TTEPDT_DOCUMENT_COM_ST_STR-PRIDOCGUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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