ABAP Select data from SAP table ROIRI_DAILY_FUELS_INFO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIRI_DAILY_FUELS_INFO
*  INTO TABLE @DATA(IT_ROIRI_DAILY_FUELS_INFO2).
*--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_ROIRI_DAILY_FUELS_INFO INDEX 1 INTO DATA(WA_ROIRI_DAILY_FUELS_INFO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIRI_DAILY_FUELS_INFO>-PBLNR = 1.
<ROIRI_DAILY_FUELS_INFO>-KUNNR = 1.
<ROIRI_DAILY_FUELS_INFO>-FKDAT = 1.
<ROIRI_DAILY_FUELS_INFO>-ACTIV = 1.
<ROIRI_DAILY_FUELS_INFO>-MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIRI_DAILY_FUELS_INFO-MAKTX, sy-vline,
  WA_ROIRI_DAILY_FUELS_INFO-STYP, sy-vline,
  WA_ROIRI_DAILY_FUELS_INFO-MRDATE, sy-vline,
  WA_ROIRI_DAILY_FUELS_INFO-MRTIME, sy-vline,
  WA_ROIRI_DAILY_FUELS_INFO-GMMNR, sy-vline,
  WA_ROIRI_DAILY_FUELS_INFO-METREV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIRI_DAILY_FUELS_INFO 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_ROIRI_DAILY_FUELS_INFO 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_ROIRI_DAILY_FUELS_INFO INTO WA_ROIRI_DAILY_FUELS_INFO.


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

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIRI_DAILY_FUELS_INFO-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIRI_DAILY_FUELS_INFO-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ROIRI_DAILY_FUELS_INFO-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIRI_DAILY_FUELS_INFO-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GMMNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIRI_DAILY_FUELS_INFO-GMMNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIRI_DAILY_FUELS_INFO-GMMNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field COMM_KMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ROIRI_DAILY_FUELS_INFO-COMM_KMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIRI_DAILY_FUELS_INFO-COMM_KMEIN.
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_ROIRI_DAILY_FUELS_INFO_STR, 
PBLNR TYPE STRING,
KUNNR TYPE STRING,
FKDAT TYPE STRING,
ACTIV TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
STYP TYPE STRING,
MRDATE TYPE STRING,
MRTIME TYPE STRING,
GMMNR TYPE STRING,
METREV TYPE STRING,
XMCOUNT TYPE STRING,
MCOUNT TYPE STRING,
MATNR_MENGE TYPE STRING,
MATNR_BASME TYPE STRING,
MATNR_KBETR TYPE STRING,
MATNR_WAERS TYPE STRING,
MATNR_KPEIN TYPE STRING,
MATNR_KMEIN TYPE STRING,
MATNR_BRTWR TYPE STRING,
COMM_KBETR TYPE STRING,
COMM_KOEIN TYPE STRING,
COMM_KPEIN TYPE STRING,
COMM_KMEIN TYPE STRING,
COMM_NETWR TYPE STRING,
COMM_WAERK TYPE STRING,
COMM_TAX_KBETR TYPE STRING,
COMM_TAX_KOEIN TYPE STRING,
COMM_TAX_KWERT TYPE STRING,
COMM_TAX_BRTWR TYPE STRING,
OIRTEXT1 TYPE STRING,
OIRTEXT2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIRI_DAILY_FUELS_INFO_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_ROIRI_DAILY_FUELS_INFO_STR-PBLNR sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-KUNNR sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-FKDAT sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-ACTIV sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-MATNR sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-MAKTX sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-STYP sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-MRDATE sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-MRTIME sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-GMMNR sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-METREV sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-XMCOUNT sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-MCOUNT sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-MATNR_MENGE sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-MATNR_BASME sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-MATNR_KBETR sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-MATNR_WAERS sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-MATNR_KPEIN sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-MATNR_KMEIN sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-MATNR_BRTWR sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-COMM_KBETR sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-COMM_KOEIN sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-COMM_KPEIN sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-COMM_KMEIN sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-COMM_NETWR sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-COMM_WAERK sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-COMM_TAX_KBETR sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-COMM_TAX_KOEIN sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-COMM_TAX_KWERT sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-COMM_TAX_BRTWR sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-OIRTEXT1 sy-vline 
WA_ROIRI_DAILY_FUELS_INFO_STR-OIRTEXT2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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