ABAP Select data from SAP table /SAPPSSRM/S_MASS_PO_HDR_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_HDR_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_HDR_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_HDR_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_HDR_MD TYPE STANDARD TABLE OF /SAPPSSRM/S_MASS_PO_HDR_MD,
      WA_/SAPPSSRM/S_MASS_PO_HDR_MD TYPE /SAPPSSRM/S_MASS_PO_HDR_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_HDR_MD> TYPE /SAPPSSRM/S_MASS_PO_HDR_MD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPPSSRM/S_MASS_PO_HDR_MD
*  INTO TABLE @DATA(IT_/SAPPSSRM/S_MASS_PO_HDR_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_HDR_MD INDEX 1 INTO DATA(WA_/SAPPSSRM/S_MASS_PO_HDR_MD2).


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

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

ENDLOOP.

LOOP AT IT_/SAPPSSRM/S_MASS_PO_HDR_MD INTO WA_/SAPPSSRM/S_MASS_PO_HDR_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_HDR_MD-GUID, sy-vline,
  WA_/SAPPSSRM/S_MASS_PO_HDR_MD-OBJECT_ID, sy-vline,
  WA_/SAPPSSRM/S_MASS_PO_HDR_MD-DESCRIPTION, sy-vline,
  WA_/SAPPSSRM/S_MASS_PO_HDR_MD-PROC_ORG_ID, sy-vline,
  WA_/SAPPSSRM/S_MASS_PO_HDR_MD-PROC_GROUP_ID, sy-vline,
  WA_/SAPPSSRM/S_MASS_PO_HDR_MD-POSTING_DATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPPSSRM/S_MASS_PO_HDR_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_HDR_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_HDR_MD INTO WA_/SAPPSSRM/S_MASS_PO_HDR_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_HDR_MD-MK_OBJECT_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPPSSRM/S_MASS_PO_HDR_MD-MK_OBJECT_ID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit TSTPS, internal->external for field CREATED_AT
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_/SAPPSSRM/S_MASS_PO_HDR_MD-CREATED_AT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPPSSRM/S_MASS_PO_HDR_MD-CREATED_AT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field CHANGED_AT
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_/SAPPSSRM/S_MASS_PO_HDR_MD-CHANGED_AT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPPSSRM/S_MASS_PO_HDR_MD-CHANGED_AT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PS_CORRES_NOV_PO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SAPPSSRM/S_MASS_PO_HDR_MD-PS_CORRES_NOV_PO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPPSSRM/S_MASS_PO_HDR_MD-PS_CORRES_NOV_PO.
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_HDR_MD_STR, 
MCN_ACTDOCGUID TYPE STRING,
MCN_OBJGUID TYPE STRING,
MK_GUID_H TYPE STRING,
MK_OBJECT_ID TYPE STRING,
MK_DESCRIPTION TYPE STRING,
GUID TYPE STRING,
OBJECT_ID TYPE STRING,
DESCRIPTION TYPE STRING,
PROC_ORG_ID TYPE STRING,
PROC_GROUP_ID TYPE STRING,
POSTING_DATE TYPE STRING,
CURRENCY TYPE STRING,
TOTAL_VALUE TYPE STRING,
TOTAL_TAX TYPE STRING,
PMNTTRMS TYPE STRING,
INCOTERM_KEY TYPE STRING,
INCOTERM_LOC TYPE STRING,
PROCESS_TYPE TYPE STRING,
VERSION_TYPE TYPE STRING,
VERSION_NO TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_AT TYPE STRING,
CHANGED_BY TYPE STRING,
CHANGED_AT TYPE STRING,
PS_EXTERNAL TYPE STRING,
PS_CHANGE_SERIAL TYPE STRING,
PS_SET_LPN_FINAL TYPE STRING,
PS_REASON_CODE TYPE STRING,
PS_CORRES_NOV_PO TYPE STRING,
PS_US01 TYPE STRING,
PS_US02 TYPE STRING,
PS_US03 TYPE STRING,
PS_US04 TYPE STRING,
PS_US05 TYPE STRING,
PS_US06 TYPE STRING,
PS_US07 TYPE STRING,
PS_US08 TYPE STRING,
PS_US09 TYPE STRING,
PS_US10 TYPE STRING,
PS_US01_DATE TYPE STRING,
PS_US02_DATE TYPE STRING,
PS_US03_DATE TYPE STRING,
PS_US04_DATE TYPE STRING,
PS_US05_DATE TYPE STRING,
PS_US06_DATE TYPE STRING,
PS_US07_DATE TYPE STRING,
PS_US08_DATE TYPE STRING,
PS_US09_DATE TYPE STRING,
PS_US10_DATE TYPE STRING,
PS_POSTING_DATE TYPE STRING,
PS_DOC_DATE_BL TYPE STRING,
PS_ORDER_DATE TYPE STRING,
PS_POST_PERIOD TYPE STRING,
PS_SELPROM_BLOCK TYPE STRING,
PS_CHANGE_TYPE TYPE STRING,
DUMMY_EEW_PDHSC_PO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPPSSRM/S_MASS_PO_HDR_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_HDR_MD_STR-MCN_ACTDOCGUID sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-MCN_OBJGUID sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-MK_GUID_H sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-MK_OBJECT_ID sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-MK_DESCRIPTION sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-GUID sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-OBJECT_ID sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-DESCRIPTION sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PROC_ORG_ID sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PROC_GROUP_ID sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-POSTING_DATE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-CURRENCY sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-TOTAL_VALUE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-TOTAL_TAX sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PMNTTRMS sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-INCOTERM_KEY sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-INCOTERM_LOC sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PROCESS_TYPE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-VERSION_TYPE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-VERSION_NO sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-CREATED_BY sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-CREATED_AT sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-CHANGED_BY sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-CHANGED_AT sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_EXTERNAL sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_CHANGE_SERIAL sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_SET_LPN_FINAL sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_REASON_CODE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_CORRES_NOV_PO sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US01 sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US02 sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US03 sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US04 sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US05 sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US06 sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US07 sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US08 sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US09 sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US10 sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US01_DATE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US02_DATE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US03_DATE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US04_DATE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US05_DATE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US06_DATE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US07_DATE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US08_DATE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US09_DATE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_US10_DATE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_POSTING_DATE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_DOC_DATE_BL sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_ORDER_DATE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_POST_PERIOD sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_SELPROM_BLOCK sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-PS_CHANGE_TYPE sy-vline 
WA_/SAPPSSRM/S_MASS_PO_HDR_MD_STR-DUMMY_EEW_PDHSC_PO sy-vline      INTO ld_text SEPARATED BY SPACE.

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