ABAP Select data from SAP table PDV_MASS_ACT_ASS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PDV_MASS_ACT_ASS
*  INTO TABLE @DATA(IT_PDV_MASS_ACT_ASS2).
*--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_PDV_MASS_ACT_ASS INDEX 1 INTO DATA(WA_PDV_MASS_ACT_ASS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PDV_MASS_ACT_ASS>-PRODUCT = 1.
<PDV_MASS_ACT_ASS>-LOCATION = 1.
<PDV_MASS_ACT_ASS>-PPE_NAME = 1.
<PDV_MASS_ACT_ASS>-PPEGUID = 1.
<PDV_MASS_ACT_ASS>-ROUTING = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PDV_MASS_ACT_ASS-ACTHDR_GUID, sy-vline,
  WA_PDV_MASS_ACT_ASS-OPRNAME, sy-vline,
  WA_PDV_MASS_ACT_ASS-OPRGUID, sy-vline,
  WA_PDV_MASS_ACT_ASS-ACTNAME, sy-vline,
  WA_PDV_MASS_ACT_ASS-ACTGUID, sy-vline,
  WA_PDV_MASS_ACT_ASS-PNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PDV_MASS_ACT_ASS 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_PDV_MASS_ACT_ASS 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_PDV_MASS_ACT_ASS INTO WA_PDV_MASS_ACT_ASS.


*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 MATN1, internal->external for field PRODUCT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_PDV_MASS_ACT_ASS-PRODUCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PDV_MASS_ACT_ASS-PRODUCT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field H_IO_OFFSET_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PDV_MASS_ACT_ASS-H_IO_OFFSET_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PDV_MASS_ACT_ASS-H_IO_OFFSET_UNIT.
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_PDV_MASS_ACT_ASS_STR, 
PRODUCT TYPE STRING,
LOCATION TYPE STRING,
PPE_NAME TYPE STRING,
PPEGUID TYPE STRING,
ROUTING TYPE STRING,
ACTHDR_GUID TYPE STRING,
OPRNAME TYPE STRING,
OPRGUID TYPE STRING,
ACTNAME TYPE STRING,
ACTGUID TYPE STRING,
PNAME TYPE STRING,
CLASS TYPE STRING,
PNGUID TYPE STRING,
PVNAME TYPE STRING,
PVGUID TYPE STRING,
PRGUID TYPE STRING,
A_IOCOMPONENT TYPE STRING,
B_CREADAT TYPE STRING,
C_CREABY TYPE STRING,
D_CHNGDAT TYPE STRING,
E_CHNGBY TYPE STRING,
F_MATCO TYPE STRING,
G_IO_OFFSET TYPE STRING,
H_IO_OFFSET_UNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PDV_MASS_ACT_ASS_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_PDV_MASS_ACT_ASS_STR-PRODUCT sy-vline 
WA_PDV_MASS_ACT_ASS_STR-LOCATION sy-vline 
WA_PDV_MASS_ACT_ASS_STR-PPE_NAME sy-vline 
WA_PDV_MASS_ACT_ASS_STR-PPEGUID sy-vline 
WA_PDV_MASS_ACT_ASS_STR-ROUTING sy-vline 
WA_PDV_MASS_ACT_ASS_STR-ACTHDR_GUID sy-vline 
WA_PDV_MASS_ACT_ASS_STR-OPRNAME sy-vline 
WA_PDV_MASS_ACT_ASS_STR-OPRGUID sy-vline 
WA_PDV_MASS_ACT_ASS_STR-ACTNAME sy-vline 
WA_PDV_MASS_ACT_ASS_STR-ACTGUID sy-vline 
WA_PDV_MASS_ACT_ASS_STR-PNAME sy-vline 
WA_PDV_MASS_ACT_ASS_STR-CLASS sy-vline 
WA_PDV_MASS_ACT_ASS_STR-PNGUID sy-vline 
WA_PDV_MASS_ACT_ASS_STR-PVNAME sy-vline 
WA_PDV_MASS_ACT_ASS_STR-PVGUID sy-vline 
WA_PDV_MASS_ACT_ASS_STR-PRGUID sy-vline 
WA_PDV_MASS_ACT_ASS_STR-A_IOCOMPONENT sy-vline 
WA_PDV_MASS_ACT_ASS_STR-B_CREADAT sy-vline 
WA_PDV_MASS_ACT_ASS_STR-C_CREABY sy-vline 
WA_PDV_MASS_ACT_ASS_STR-D_CHNGDAT sy-vline 
WA_PDV_MASS_ACT_ASS_STR-E_CHNGBY sy-vline 
WA_PDV_MASS_ACT_ASS_STR-F_MATCO sy-vline 
WA_PDV_MASS_ACT_ASS_STR-G_IO_OFFSET sy-vline 
WA_PDV_MASS_ACT_ASS_STR-H_IO_OFFSET_UNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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