ABAP Select data from SAP table FMPEP_LAY1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FMPEP_LAY1 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 FMPEP_LAY1. 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 FMPEP_LAY1 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_FMPEP_LAY1 TYPE STANDARD TABLE OF FMPEP_LAY1,
      WA_FMPEP_LAY1 TYPE FMPEP_LAY1,
      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: <FMPEP_LAY1> TYPE FMPEP_LAY1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FMPEP_LAY1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FMPEP_LAY1
  INTO TABLE IT_FMPEP_LAY1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FMPEP_LAY1
*  INTO TABLE @DATA(IT_FMPEP_LAY12).
*--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_FMPEP_LAY1 INDEX 1 INTO DATA(WA_FMPEP_LAY12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FMPEP_LAY1 ASSIGNING <FMPEP_LAY1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FMPEP_LAY1>-LAYOUTVAR = 1.
<FMPEP_LAY1>-LAYOUTNAME = 1.
<FMPEP_LAY1>-BUDCAT = 1.
<FMPEP_LAY1>-PROCESS = 1.
<FMPEP_LAY1>-VERSION = 1.

ENDLOOP.

LOOP AT IT_FMPEP_LAY1 INTO WA_FMPEP_LAY1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FMPEP_LAY1-VALTYPE, sy-vline,
  WA_FMPEP_LAY1-BUDTYPE, sy-vline,
  WA_FMPEP_LAY1-FISCYEAR, sy-vline,
  WA_FMPEP_LAY1-CEFFYEAR, sy-vline,
  WA_FMPEP_LAY1-POSTDATE, sy-vline,
  WA_FMPEP_LAY1-DISTKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FMPEP_LAY1 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_FMPEP_LAY1 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_FMPEP_LAY1 INTO WA_FMPEP_LAY1.


*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 VERSION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FMPEP_LAY1-VERSION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMPEP_LAY1-VERSION.
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_FMPEP_LAY1_STR, 
LAYOUTVAR TYPE STRING,
LAYOUTNAME TYPE STRING,
BUDCAT TYPE STRING,
PROCESS TYPE STRING,
VERSION TYPE STRING,
VALTYPE TYPE STRING,
BUDTYPE TYPE STRING,
FISCYEAR TYPE STRING,
CEFFYEAR TYPE STRING,
POSTDATE TYPE STRING,
DISTKEY TYPE STRING,
DOCTYPE TYPE STRING,
DOCSTATE TYPE STRING,
DOCDATE TYPE STRING,
ADDITIVE_MODE TYPE STRING,
PERIOD_FROM TYPE STRING,
PERIOD_TO TYPE STRING,
POSTING_PERIOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FMPEP_LAY1_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_FMPEP_LAY1_STR-LAYOUTVAR sy-vline 
WA_FMPEP_LAY1_STR-LAYOUTNAME sy-vline 
WA_FMPEP_LAY1_STR-BUDCAT sy-vline 
WA_FMPEP_LAY1_STR-PROCESS sy-vline 
WA_FMPEP_LAY1_STR-VERSION sy-vline 
WA_FMPEP_LAY1_STR-VALTYPE sy-vline 
WA_FMPEP_LAY1_STR-BUDTYPE sy-vline 
WA_FMPEP_LAY1_STR-FISCYEAR sy-vline 
WA_FMPEP_LAY1_STR-CEFFYEAR sy-vline 
WA_FMPEP_LAY1_STR-POSTDATE sy-vline 
WA_FMPEP_LAY1_STR-DISTKEY sy-vline 
WA_FMPEP_LAY1_STR-DOCTYPE sy-vline 
WA_FMPEP_LAY1_STR-DOCSTATE sy-vline 
WA_FMPEP_LAY1_STR-DOCDATE sy-vline 
WA_FMPEP_LAY1_STR-ADDITIVE_MODE sy-vline 
WA_FMPEP_LAY1_STR-PERIOD_FROM sy-vline 
WA_FMPEP_LAY1_STR-PERIOD_TO sy-vline 
WA_FMPEP_LAY1_STR-POSTING_PERIOD sy-vline      INTO ld_text SEPARATED BY SPACE.

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