ABAP Select data from SAP table /PMG/GE_MPE_DEDCTBL_ALV_S into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /PMG/GE_MPE_DEDCTBL_ALV_S
*  INTO TABLE @DATA(IT_/PMG/GE_MPE_DEDCTBL_ALV_S2).
*--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_/PMG/GE_MPE_DEDCTBL_ALV_S INDEX 1 INTO DATA(WA_/PMG/GE_MPE_DEDCTBL_ALV_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</PMG/GE_MPE_DEDCTBL_ALV_S>-/PMG/ABDGGEN_OID = 1.
</PMG/GE_MPE_DEDCTBL_ALV_S>-DEDUCTIBLE_CDDBL = 1.
</PMG/GE_MPE_DEDCTBL_ALV_S>-DEDCTBL_AMDBL = 1.
</PMG/GE_MPE_DEDCTBL_ALV_S>-DEDCTBL_VLDBL = 1.
</PMG/GE_MPE_DEDCTBL_ALV_S>-DEDCTBLMIN_AMDBL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/PMG/GE_MPE_DEDCTBL_ALV_S-DEDCTBLMAX_AMDBL, sy-vline,
  WA_/PMG/GE_MPE_DEDCTBL_ALV_S-DDTBEGIN_DTDBL, sy-vline,
  WA_/PMG/GE_MPE_DEDCTBL_ALV_S-DDTMOD_FGDBL, sy-vline,
  WA_/PMG/GE_MPE_DEDCTBL_ALV_S-DDTEND_DTDBL, sy-vline,
  WA_/PMG/GE_MPE_DEDCTBL_ALV_S-REFERENCE_IDDBL, sy-vline,
  WA_/PMG/GE_MPE_DEDCTBL_ALV_S-DEDUCTIBLETYP_CDDBL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/PMG/GE_MPE_DEDCTBL_ALV_S 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_/PMG/GE_MPE_DEDCTBL_ALV_S 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_/PMG/GE_MPE_DEDCTBL_ALV_S INTO WA_/PMG/GE_MPE_DEDCTBL_ALV_S.


*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 J7PHD, internal->external for field DDTEND_DTDBL
CALL FUNCTION 'CONVERSION_EXIT_J7PHD_OUTPUT'
  EXPORTING
    input =                      WA_/PMG/GE_MPE_DEDCTBL_ALV_S-DDTEND_DTDBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PMG/GE_MPE_DEDCTBL_ALV_S-DDTEND_DTDBL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field APPLNR_CDDBL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PMG/GE_MPE_DEDCTBL_ALV_S-APPLNR_CDDBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PMG/GE_MPE_DEDCTBL_ALV_S-APPLNR_CDDBL.
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_/PMG/GE_MPE_DEDCTBL_ALV_S_STR, 
/PMG/ABDGGEN_OID TYPE STRING,
DEDUCTIBLE_CDDBL TYPE STRING,
DEDCTBL_AMDBL TYPE STRING,
DEDCTBL_VLDBL TYPE STRING,
DEDCTBLMIN_AMDBL TYPE STRING,
DEDCTBLMAX_AMDBL TYPE STRING,
DDTBEGIN_DTDBL TYPE STRING,
DDTMOD_FGDBL TYPE STRING,
DDTEND_DTDBL TYPE STRING,
REFERENCE_IDDBL TYPE STRING,
DEDUCTIBLETYP_CDDBL TYPE STRING,
SORTSEQUDEDCT_VLDBL TYPE STRING,
PM_IDDBL TYPE STRING,
CURRENCY_IDDBL TYPE STRING,
APPLNR_CDDBL TYPE STRING,
DEDCTBLKFT_TTDBL TYPE STRING,
DEDCTBLFT_TTDBL TYPE STRING,
CUSTOMER_PB_CIDBL TYPE STRING,
DEDCTBLTP_TT TYPE STRING,
DEDUCTIBLETYP_TT TYPE STRING,
DEDUCTIBLE_TT TYPE STRING,
FROMRISK_DD_FG TYPE STRING,
PBSTYP_DD_TT TYPE STRING,
REFERNCE_DD_TT TYPE STRING,
PROD_MOD_ASGM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/PMG/GE_MPE_DEDCTBL_ALV_S_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_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-/PMG/ABDGGEN_OID sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-DEDUCTIBLE_CDDBL sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-DEDCTBL_AMDBL sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-DEDCTBL_VLDBL sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-DEDCTBLMIN_AMDBL sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-DEDCTBLMAX_AMDBL sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-DDTBEGIN_DTDBL sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-DDTMOD_FGDBL sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-DDTEND_DTDBL sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-REFERENCE_IDDBL sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-DEDUCTIBLETYP_CDDBL sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-SORTSEQUDEDCT_VLDBL sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-PM_IDDBL sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-CURRENCY_IDDBL sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-APPLNR_CDDBL sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-DEDCTBLKFT_TTDBL sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-DEDCTBLFT_TTDBL sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-CUSTOMER_PB_CIDBL sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-DEDCTBLTP_TT sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-DEDUCTIBLETYP_TT sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-DEDUCTIBLE_TT sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-FROMRISK_DD_FG sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-PBSTYP_DD_TT sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-REFERNCE_DD_TT sy-vline 
WA_/PMG/GE_MPE_DEDCTBL_ALV_S_STR-PROD_MOD_ASGM sy-vline      INTO ld_text SEPARATED BY SPACE.

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