ABAP Select data from SAP table TEWA_EL_OBJTRAM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TEWA_EL_OBJTRAM
*  INTO TABLE @DATA(IT_TEWA_EL_OBJTRAM2).
*--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_TEWA_EL_OBJTRAM INDEX 1 INTO DATA(WA_TEWA_EL_OBJTRAM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TEWA_EL_OBJTRAM>-MANDT = 1.
<TEWA_EL_OBJTRAM>-TRANS = 1.
<TEWA_EL_OBJTRAM>-PROGNAME = 1.
<TEWA_EL_OBJTRAM>-CLASSNAME = 1.
<TEWA_EL_OBJTRAM>-ERDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TEWA_EL_OBJTRAM-ERNAM, sy-vline,
  WA_TEWA_EL_OBJTRAM-AEDAT, sy-vline,
  WA_TEWA_EL_OBJTRAM-AENAM, sy-vline,
  WA_TEWA_EL_OBJTRAM-BEGRU, sy-vline,
  WA_TEWA_EL_OBJTRAM-LOEVM, sy-vline,
  WA_TEWA_EL_OBJTRAM-ADM_ERTIMESTAMP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TEWA_EL_OBJTRAM 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_TEWA_EL_OBJTRAM 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_TEWA_EL_OBJTRAM INTO WA_TEWA_EL_OBJTRAM.


*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 ISOLA, internal->external for field ADM_ERLANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TEWA_EL_OBJTRAM-ADM_ERLANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TEWA_EL_OBJTRAM-ADM_ERLANGU.
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_TEWA_EL_OBJTRAM_STR, 
MANDT TYPE STRING,
TRANS TYPE STRING,
PROGNAME TYPE STRING,
CLASSNAME TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
BEGRU TYPE STRING,
LOEVM TYPE STRING,
ADM_ERTIMESTAMP TYPE STRING,
ADM_AETIMESTAMP TYPE STRING,
ADM_ERTIME TYPE STRING,
ADM_AETIME TYPE STRING,
ADM_ERLANGU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TEWA_EL_OBJTRAM_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_TEWA_EL_OBJTRAM_STR-MANDT sy-vline 
WA_TEWA_EL_OBJTRAM_STR-TRANS sy-vline 
WA_TEWA_EL_OBJTRAM_STR-PROGNAME sy-vline 
WA_TEWA_EL_OBJTRAM_STR-CLASSNAME sy-vline 
WA_TEWA_EL_OBJTRAM_STR-ERDAT sy-vline 
WA_TEWA_EL_OBJTRAM_STR-ERNAM sy-vline 
WA_TEWA_EL_OBJTRAM_STR-AEDAT sy-vline 
WA_TEWA_EL_OBJTRAM_STR-AENAM sy-vline 
WA_TEWA_EL_OBJTRAM_STR-BEGRU sy-vline 
WA_TEWA_EL_OBJTRAM_STR-LOEVM sy-vline 
WA_TEWA_EL_OBJTRAM_STR-ADM_ERTIMESTAMP sy-vline 
WA_TEWA_EL_OBJTRAM_STR-ADM_AETIMESTAMP sy-vline 
WA_TEWA_EL_OBJTRAM_STR-ADM_ERTIME sy-vline 
WA_TEWA_EL_OBJTRAM_STR-ADM_AETIME sy-vline 
WA_TEWA_EL_OBJTRAM_STR-ADM_ERLANGU sy-vline      INTO ld_text SEPARATED BY SPACE.

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