ABAP Select data from SAP table /SAPPSSRM/S_MASS_PO_ACC_MD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPPSSRM/S_MASS_PO_ACC_MD
*  INTO TABLE @DATA(IT_/SAPPSSRM/S_MASS_PO_ACC_MD2).
*--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_/SAPPSSRM/S_MASS_PO_ACC_MD INDEX 1 INTO DATA(WA_/SAPPSSRM/S_MASS_PO_ACC_MD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPPSSRM/S_MASS_PO_ACC_MD>-MCN_ACTDOCGUID = 1.
</SAPPSSRM/S_MASS_PO_ACC_MD>-MCN_OBJGUID = 1.
</SAPPSSRM/S_MASS_PO_ACC_MD>-MK_GUID_H = 1.
</SAPPSSRM/S_MASS_PO_ACC_MD>-MK_OBJECT_ID = 1.
</SAPPSSRM/S_MASS_PO_ACC_MD>-MK_DESCRIPTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPPSSRM/S_MASS_PO_ACC_MD-MK_GUID_I, sy-vline,
  WA_/SAPPSSRM/S_MASS_PO_ACC_MD-MK_ITEM_NO, sy-vline,
  WA_/SAPPSSRM/S_MASS_PO_ACC_MD-GUID, sy-vline,
  WA_/SAPPSSRM/S_MASS_PO_ACC_MD-P_GUID, sy-vline,
  WA_/SAPPSSRM/S_MASS_PO_ACC_MD-ACC_NO, sy-vline,
  WA_/SAPPSSRM/S_MASS_PO_ACC_MD-DISTR_PERC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPPSSRM/S_MASS_PO_ACC_MD 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_/SAPPSSRM/S_MASS_PO_ACC_MD 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_/SAPPSSRM/S_MASS_PO_ACC_MD INTO WA_/SAPPSSRM/S_MASS_PO_ACC_MD.


*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 MK_OBJECT_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SAPPSSRM/S_MASS_PO_ACC_MD-MK_OBJECT_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPPSSRM/S_MASS_PO_ACC_MD-MK_OBJECT_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field G_L_ACCT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SAPPSSRM/S_MASS_PO_ACC_MD-G_L_ACCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPPSSRM/S_MASS_PO_ACC_MD-G_L_ACCT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COST_CTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SAPPSSRM/S_MASS_PO_ACC_MD-COST_CTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPPSSRM/S_MASS_PO_ACC_MD-COST_CTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit FMCIL, internal->external for field CMMT_ITEM
CALL FUNCTION 'CONVERSION_EXIT_FMCIL_OUTPUT'
  EXPORTING
    input =                      WA_/SAPPSSRM/S_MASS_PO_ACC_MD-CMMT_ITEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPPSSRM/S_MASS_PO_ACC_MD-CMMT_ITEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FUNDS_RES
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SAPPSSRM/S_MASS_PO_ACC_MD-FUNDS_RES
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPPSSRM/S_MASS_PO_ACC_MD-FUNDS_RES.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field WBS_ELEM_E
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_/SAPPSSRM/S_MASS_PO_ACC_MD-WBS_ELEM_E
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPPSSRM/S_MASS_PO_ACC_MD-WBS_ELEM_E.
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_/SAPPSSRM/S_MASS_PO_ACC_MD_STR, 
MCN_ACTDOCGUID TYPE STRING,
MCN_OBJGUID TYPE STRING,
MK_GUID_H TYPE STRING,
MK_OBJECT_ID TYPE STRING,
MK_DESCRIPTION TYPE STRING,
MK_GUID_I TYPE STRING,
MK_ITEM_NO TYPE STRING,
GUID TYPE STRING,
P_GUID TYPE STRING,
ACC_NO TYPE STRING,
DISTR_PERC TYPE STRING,
G_L_ACCT TYPE STRING,
BUS_AREA TYPE STRING,
COST_CTR TYPE STRING,
FUND TYPE STRING,
FUNDS_CTR TYPE STRING,
CMMT_ITEM TYPE STRING,
FUNC_AREA TYPE STRING,
FUNDS_RES TYPE STRING,
RES_ITEM TYPE STRING,
CO_AREA TYPE STRING,
DUMMY_EEW_PDACF TYPE STRING,
WBS_ELEM_E TYPE STRING,
BUDGET_PERIOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPPSSRM/S_MASS_PO_ACC_MD_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_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-MCN_ACTDOCGUID sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-MCN_OBJGUID sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-MK_GUID_H sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-MK_OBJECT_ID sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-MK_DESCRIPTION sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-MK_GUID_I sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-MK_ITEM_NO sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-GUID sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-P_GUID sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-ACC_NO sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-DISTR_PERC sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-G_L_ACCT sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-BUS_AREA sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-COST_CTR sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-FUND sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-FUNDS_CTR sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-CMMT_ITEM sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-FUNC_AREA sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-FUNDS_RES sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-RES_ITEM sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-CO_AREA sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-DUMMY_EEW_PDACF sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-WBS_ELEM_E sy-vline 
WA_/SAPPSSRM/S_MASS_PO_ACC_MD_STR-BUDGET_PERIOD sy-vline      INTO ld_text SEPARATED BY SPACE.

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