ABAP Select data from SAP table MEPO1317 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MEPO1317 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 MEPO1317. 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 MEPO1317 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_MEPO1317 TYPE STANDARD TABLE OF MEPO1317,
      WA_MEPO1317 TYPE MEPO1317,
      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: <MEPO1317> TYPE MEPO1317.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MEPO1317.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MEPO1317
  INTO TABLE IT_MEPO1317.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MEPO1317
*  INTO TABLE @DATA(IT_MEPO13172).
*--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_MEPO1317 INDEX 1 INTO DATA(WA_MEPO13172).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MEPO1317 ASSIGNING <MEPO1317>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MEPO1317>-REPOS = 1.
<MEPO1317>-WEBRE = 1.
<MEPO1317>-XERSY = 1.
<MEPO1317>-EREKZ = 1.
<MEPO1317>-MWSKZ = 1.

ENDLOOP.

LOOP AT IT_MEPO1317 INTO WA_MEPO1317.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MEPO1317-TXDAT, sy-vline,
  WA_MEPO1317-TAX_COUNTRY, sy-vline,
  WA_MEPO1317-TXJCD, sy-vline,
  WA_MEPO1317-LEBRE, sy-vline,
  WA_MEPO1317-RETPC, sy-vline,
  WA_MEPO1317-DPTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MEPO1317 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_MEPO1317 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_MEPO1317 INTO WA_MEPO1317.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_MEPO1317_STR, 
REPOS TYPE STRING,
WEBRE TYPE STRING,
XERSY TYPE STRING,
EREKZ TYPE STRING,
MWSKZ TYPE STRING,
TXDAT TYPE STRING,
TAX_COUNTRY TYPE STRING,
TXJCD TYPE STRING,
LEBRE TYPE STRING,
RETPC TYPE STRING,
DPTYP TYPE STRING,
DPTXT TYPE STRING,
DPAMT TYPE STRING,
DPPCT TYPE STRING,
DPDAT TYPE STRING,
WAERS TYPE STRING,
DIFF_INVOICE TYPE STRING,
TC_AUT_DET TYPE STRING,
MANUAL_TC_REASON TYPE STRING,
FISCAL_INCENTIVE TYPE STRING,
TAX_SUBJECT_ST TYPE STRING,
MANUAL_TC_REASON_TXT TYPE STRING,
FISCAL_INCENTIVE_TXT TYPE STRING,
FISCAL_INCENTIVE_ID TYPE STRING,
FISCAL_INCENTIVE_ID_TXT TYPE STRING,
SF_TXJCD TYPE STRING,
ST_TXJCD TYPE STRING,
BUKRS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MEPO1317_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_MEPO1317_STR-REPOS sy-vline 
WA_MEPO1317_STR-WEBRE sy-vline 
WA_MEPO1317_STR-XERSY sy-vline 
WA_MEPO1317_STR-EREKZ sy-vline 
WA_MEPO1317_STR-MWSKZ sy-vline 
WA_MEPO1317_STR-TXDAT sy-vline 
WA_MEPO1317_STR-TAX_COUNTRY sy-vline 
WA_MEPO1317_STR-TXJCD sy-vline 
WA_MEPO1317_STR-LEBRE sy-vline 
WA_MEPO1317_STR-RETPC sy-vline 
WA_MEPO1317_STR-DPTYP sy-vline 
WA_MEPO1317_STR-DPTXT sy-vline 
WA_MEPO1317_STR-DPAMT sy-vline 
WA_MEPO1317_STR-DPPCT sy-vline 
WA_MEPO1317_STR-DPDAT sy-vline 
WA_MEPO1317_STR-WAERS sy-vline 
WA_MEPO1317_STR-DIFF_INVOICE sy-vline 
WA_MEPO1317_STR-TC_AUT_DET sy-vline 
WA_MEPO1317_STR-MANUAL_TC_REASON sy-vline 
WA_MEPO1317_STR-FISCAL_INCENTIVE sy-vline 
WA_MEPO1317_STR-TAX_SUBJECT_ST sy-vline 
WA_MEPO1317_STR-MANUAL_TC_REASON_TXT sy-vline 
WA_MEPO1317_STR-FISCAL_INCENTIVE_TXT sy-vline 
WA_MEPO1317_STR-FISCAL_INCENTIVE_ID sy-vline 
WA_MEPO1317_STR-FISCAL_INCENTIVE_ID_TXT sy-vline 
WA_MEPO1317_STR-SF_TXJCD sy-vline 
WA_MEPO1317_STR-ST_TXJCD sy-vline 
WA_MEPO1317_STR-BUKRS sy-vline      INTO ld_text SEPARATED BY SPACE.

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