ABAP Select data from SAP table /SAPTRX/BAPI_EVM_DISP_MER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPTRX/BAPI_EVM_DISP_MER
*  INTO TABLE @DATA(IT_/SAPTRX/BAPI_EVM_DISP_MER2).
*--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_/SAPTRX/BAPI_EVM_DISP_MER INDEX 1 INTO DATA(WA_/SAPTRX/BAPI_EVM_DISP_MER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPTRX/BAPI_EVM_DISP_MER>-EVT_GUID = 1.
</SAPTRX/BAPI_EVM_DISP_MER>-SEQ_NUM = 1.
</SAPTRX/BAPI_EVM_DISP_MER>-MESTYP = 1.
</SAPTRX/BAPI_EVM_DISP_MER>-OBJTYP = 1.
</SAPTRX/BAPI_EVM_DISP_MER>-OBJID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPTRX/BAPI_EVM_DISP_MER-PARCOD, sy-vline,
  WA_/SAPTRX/BAPI_EVM_DISP_MER-PARID, sy-vline,
  WA_/SAPTRX/BAPI_EVM_DISP_MER-ITMTYP, sy-vline,
  WA_/SAPTRX/BAPI_EVM_DISP_MER-ITMID, sy-vline,
  WA_/SAPTRX/BAPI_EVM_DISP_MER-AMOUNT, sy-vline,
  WA_/SAPTRX/BAPI_EVM_DISP_MER-AMUNIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPTRX/BAPI_EVM_DISP_MER 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_/SAPTRX/BAPI_EVM_DISP_MER 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_/SAPTRX/BAPI_EVM_DISP_MER INTO WA_/SAPTRX/BAPI_EVM_DISP_MER.


*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 CUNIT, internal->external for field AMUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPTRX/BAPI_EVM_DISP_MER-AMUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPTRX/BAPI_EVM_DISP_MER-AMUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field CNFTST
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_/SAPTRX/BAPI_EVM_DISP_MER-CNFTST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPTRX/BAPI_EVM_DISP_MER-CNFTST.
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_/SAPTRX/BAPI_EVM_DISP_MER_STR, 
EVT_GUID TYPE STRING,
SEQ_NUM TYPE STRING,
MESTYP TYPE STRING,
OBJTYP TYPE STRING,
OBJID TYPE STRING,
PARCOD TYPE STRING,
PARID TYPE STRING,
ITMTYP TYPE STRING,
ITMID TYPE STRING,
AMOUNT TYPE STRING,
AMUNIT TYPE STRING,
CURRENCY TYPE STRING,
MESSIG TYPE STRING,
MESATT TYPE STRING,
CNFDAT TYPE STRING,
CNFTIM TYPE STRING,
CNFZON TYPE STRING,
CNFTST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPTRX/BAPI_EVM_DISP_MER_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_/SAPTRX/BAPI_EVM_DISP_MER_STR-EVT_GUID sy-vline 
WA_/SAPTRX/BAPI_EVM_DISP_MER_STR-SEQ_NUM sy-vline 
WA_/SAPTRX/BAPI_EVM_DISP_MER_STR-MESTYP sy-vline 
WA_/SAPTRX/BAPI_EVM_DISP_MER_STR-OBJTYP sy-vline 
WA_/SAPTRX/BAPI_EVM_DISP_MER_STR-OBJID sy-vline 
WA_/SAPTRX/BAPI_EVM_DISP_MER_STR-PARCOD sy-vline 
WA_/SAPTRX/BAPI_EVM_DISP_MER_STR-PARID sy-vline 
WA_/SAPTRX/BAPI_EVM_DISP_MER_STR-ITMTYP sy-vline 
WA_/SAPTRX/BAPI_EVM_DISP_MER_STR-ITMID sy-vline 
WA_/SAPTRX/BAPI_EVM_DISP_MER_STR-AMOUNT sy-vline 
WA_/SAPTRX/BAPI_EVM_DISP_MER_STR-AMUNIT sy-vline 
WA_/SAPTRX/BAPI_EVM_DISP_MER_STR-CURRENCY sy-vline 
WA_/SAPTRX/BAPI_EVM_DISP_MER_STR-MESSIG sy-vline 
WA_/SAPTRX/BAPI_EVM_DISP_MER_STR-MESATT sy-vline 
WA_/SAPTRX/BAPI_EVM_DISP_MER_STR-CNFDAT sy-vline 
WA_/SAPTRX/BAPI_EVM_DISP_MER_STR-CNFTIM sy-vline 
WA_/SAPTRX/BAPI_EVM_DISP_MER_STR-CNFZON sy-vline 
WA_/SAPTRX/BAPI_EVM_DISP_MER_STR-CNFTST sy-vline      INTO ld_text SEPARATED BY SPACE.

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