ABAP Select data from SAP table ROIJ_EL_LAYT_INFEV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIJ_EL_LAYT_INFEV
*  INTO TABLE @DATA(IT_ROIJ_EL_LAYT_INFEV2).
*--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_ROIJ_EL_LAYT_INFEV INDEX 1 INTO DATA(WA_ROIJ_EL_LAYT_INFEV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIJ_EL_LAYT_INFEV>-MANDT = 1.
<ROIJ_EL_LAYT_INFEV>-VBELN = 1.
<ROIJ_EL_LAYT_INFEV>-VBTYP = 1.
<ROIJ_EL_LAYT_INFEV>-POSNR = 1.
<ROIJ_EL_LAYT_INFEV>-SEQNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIJ_EL_LAYT_INFEV-IND, sy-vline,
  WA_ROIJ_EL_LAYT_INFEV-LINETYPE, sy-vline,
  WA_ROIJ_EL_LAYT_INFEV-OP_POINT, sy-vline,
  WA_ROIJ_EL_LAYT_INFEV-EVENT, sy-vline,
  WA_ROIJ_EL_LAYT_INFEV-ADD_TIME, sy-vline,
  WA_ROIJ_EL_LAYT_INFEV-ADD_UOM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIJ_EL_LAYT_INFEV 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_ROIJ_EL_LAYT_INFEV 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_ROIJ_EL_LAYT_INFEV INTO WA_ROIJ_EL_LAYT_INFEV.


*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 VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIJ_EL_LAYT_INFEV-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJ_EL_LAYT_INFEV-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ADD_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ROIJ_EL_LAYT_INFEV-ADD_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJ_EL_LAYT_INFEV-ADD_UOM.
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_ROIJ_EL_LAYT_INFEV_STR, 
MANDT TYPE STRING,
VBELN TYPE STRING,
VBTYP TYPE STRING,
POSNR TYPE STRING,
SEQNR TYPE STRING,
IND TYPE STRING,
LINETYPE TYPE STRING,
OP_POINT TYPE STRING,
EVENT TYPE STRING,
ADD_TIME TYPE STRING,
ADD_UOM TYPE STRING,
EV_RULE TYPE STRING,
T_POINT TYPE STRING,
TIME TYPE STRING,
ST_TIME TYPE STRING,
SHIFT TYPE STRING,
RATE TYPE STRING,
RELEVANCE TYPE STRING,
ERDAT TYPE STRING,
ERZEIT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AEZEIT TYPE STRING,
AENAM TYPE STRING,
BLOIND TYPE STRING,
DELIND TYPE STRING,
TKTSELECT TYPE STRING,
_DATAAGING TYPE STRING,
UPDATEFLAG TYPE STRING,
TYPE_TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIJ_EL_LAYT_INFEV_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_ROIJ_EL_LAYT_INFEV_STR-MANDT sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-VBELN sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-VBTYP sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-POSNR sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-SEQNR sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-IND sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-LINETYPE sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-OP_POINT sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-EVENT sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-ADD_TIME sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-ADD_UOM sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-EV_RULE sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-T_POINT sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-TIME sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-ST_TIME sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-SHIFT sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-RATE sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-RELEVANCE sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-ERDAT sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-ERZEIT sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-ERNAM sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-AEDAT sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-AEZEIT sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-AENAM sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-BLOIND sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-DELIND sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-TKTSELECT sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-_DATAAGING sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-UPDATEFLAG sy-vline 
WA_ROIJ_EL_LAYT_INFEV_STR-TYPE_TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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