ABAP Select data from SAP table /ISDFPS/MPA_EXP_WS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ISDFPS/MPA_EXP_WS
*  INTO TABLE @DATA(IT_/ISDFPS/MPA_EXP_WS2).
*--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_/ISDFPS/MPA_EXP_WS INDEX 1 INTO DATA(WA_/ISDFPS/MPA_EXP_WS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ISDFPS/MPA_EXP_WS>-FORCE_ID = 1.
</ISDFPS/MPA_EXP_WS>-FORCE_CNT = 1.
</ISDFPS/MPA_EXP_WS>-PLVAR = 1.
</ISDFPS/MPA_EXP_WS>-OTYPE = 1.
</ISDFPS/MPA_EXP_WS>-OBJID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ISDFPS/MPA_EXP_WS-SHORT, sy-vline,
  WA_/ISDFPS/MPA_EXP_WS-STEXT, sy-vline,
  WA_/ISDFPS/MPA_EXP_WS-BEGDA, sy-vline,
  WA_/ISDFPS/MPA_EXP_WS-ENDDA, sy-vline,
  WA_/ISDFPS/MPA_EXP_WS-UDAYS, sy-vline,
  WA_/ISDFPS/MPA_EXP_WS-BERID_P, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ISDFPS/MPA_EXP_WS 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_/ISDFPS/MPA_EXP_WS 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_/ISDFPS/MPA_EXP_WS INTO WA_/ISDFPS/MPA_EXP_WS.


*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 MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/MPA_EXP_WS-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/MPA_EXP_WS-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/MPA_EXP_WS-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/MPA_EXP_WS-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ERFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/MPA_EXP_WS-ERFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/MPA_EXP_WS-ERFME.
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_/ISDFPS/MPA_EXP_WS_STR, 
FORCE_ID TYPE STRING,
FORCE_CNT TYPE STRING,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
SHORT TYPE STRING,
STEXT TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
UDAYS TYPE STRING,
BERID_P TYPE STRING,
BERID_S TYPE STRING,
WERKS_P TYPE STRING,
WERKS_S TYPE STRING,
LGORT TYPE STRING,
LGORTACNT TYPE STRING,
GUID_EXT TYPE STRING,
MATNR TYPE STRING,
KTEXT TYPE STRING,
BWART TYPE STRING,
SHKZG TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
TMENGE TYPE STRING,
MINBE TYPE STRING,
FUNCT TYPE STRING,
SELECTED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ISDFPS/MPA_EXP_WS_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_/ISDFPS/MPA_EXP_WS_STR-FORCE_ID sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-FORCE_CNT sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-PLVAR sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-OTYPE sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-OBJID sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-SHORT sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-STEXT sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-BEGDA sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-ENDDA sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-UDAYS sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-BERID_P sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-BERID_S sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-WERKS_P sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-WERKS_S sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-LGORT sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-LGORTACNT sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-GUID_EXT sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-MATNR sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-KTEXT sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-BWART sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-SHKZG sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-MENGE sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-MEINS sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-ERFMG sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-ERFME sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-BLDAT sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-BUDAT sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-TMENGE sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-MINBE sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-FUNCT sy-vline 
WA_/ISDFPS/MPA_EXP_WS_STR-SELECTED sy-vline      INTO ld_text SEPARATED BY SPACE.

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