ABAP Select data from SAP table ROIJ_VEHAVAIL_STATUS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ROIJ_VEHAVAIL_STATUS 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_VEHAVAIL_STATUS. 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_VEHAVAIL_STATUS 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_VEHAVAIL_STATUS TYPE STANDARD TABLE OF ROIJ_VEHAVAIL_STATUS,
      WA_ROIJ_VEHAVAIL_STATUS TYPE ROIJ_VEHAVAIL_STATUS,
      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_VEHAVAIL_STATUS> TYPE ROIJ_VEHAVAIL_STATUS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIJ_VEHAVAIL_STATUS
*  INTO TABLE @DATA(IT_ROIJ_VEHAVAIL_STATUS2).
*--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_VEHAVAIL_STATUS INDEX 1 INTO DATA(WA_ROIJ_VEHAVAIL_STATUS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIJ_VEHAVAIL_STATUS>-NMVEHICLE = 1.
<ROIJ_VEHAVAIL_STATUS>-PRNOMTK = 1.
<ROIJ_VEHAVAIL_STATUS>-NOMTK = 1.
<ROIJ_VEHAVAIL_STATUS>-PRLOCID = 1.
<ROIJ_VEHAVAIL_STATUS>-LOCID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIJ_VEHAVAIL_STATUS-PRSCHDATE, sy-vline,
  WA_ROIJ_VEHAVAIL_STATUS-ROUTE, sy-vline,
  WA_ROIJ_VEHAVAIL_STATUS-DURATION, sy-vline,
  WA_ROIJ_VEHAVAIL_STATUS-EXP_ARR_DATE, sy-vline,
  WA_ROIJ_VEHAVAIL_STATUS-RC_CODE, sy-vline,
  WA_ROIJ_VEHAVAIL_STATUS-TYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIJ_VEHAVAIL_STATUS 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_VEHAVAIL_STATUS 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_VEHAVAIL_STATUS INTO WA_ROIJ_VEHAVAIL_STATUS.


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

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

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

*Conversion exit TSTRG, internal->external for field DURATION
CALL FUNCTION 'CONVERSION_EXIT_TSTRG_OUTPUT'
  EXPORTING
    input =                      WA_ROIJ_VEHAVAIL_STATUS-DURATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJ_VEHAVAIL_STATUS-DURATION.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field REMCAP_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ROIJ_VEHAVAIL_STATUS-REMCAP_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJ_VEHAVAIL_STATUS-REMCAP_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_VEHAVAIL_STATUS_STR, 
NMVEHICLE TYPE STRING,
PRNOMTK TYPE STRING,
NOMTK TYPE STRING,
PRLOCID TYPE STRING,
LOCID TYPE STRING,
PRSCHDATE TYPE STRING,
ROUTE TYPE STRING,
DURATION TYPE STRING,
EXP_ARR_DATE TYPE STRING,
RC_CODE TYPE STRING,
TYPE TYPE STRING,
FR_DATE TYPE STRING,
TO_DATE TYPE STRING,
VBELN TYPE STRING,
VBTYP TYPE STRING,
POSNR TYPE STRING,
VEH_MAXVOL TYPE STRING,
VOL_UOM TYPE STRING,
AVAIL_CAPACITY TYPE STRING,
REMCAP TYPE STRING,
REMCAP_UOM TYPE STRING,
REMCAP_PERC TYPE STRING,
AVAIL_PER TYPE STRING,
MIN_AVAIL_PER TYPE STRING,
MSG_TYPE TYPE STRING,
MSG_CLASS TYPE STRING,
MSG_NBR TYPE STRING,
MSG_ARG1 TYPE STRING,
MSG_ARG2 TYPE STRING,
MSG_ARG3 TYPE STRING,
MSG_ARG4 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIJ_VEHAVAIL_STATUS_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_VEHAVAIL_STATUS_STR-NMVEHICLE sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-PRNOMTK sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-NOMTK sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-PRLOCID sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-LOCID sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-PRSCHDATE sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-ROUTE sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-DURATION sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-EXP_ARR_DATE sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-RC_CODE sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-TYPE sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-FR_DATE sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-TO_DATE sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-VBELN sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-VBTYP sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-POSNR sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-VEH_MAXVOL sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-VOL_UOM sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-AVAIL_CAPACITY sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-REMCAP sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-REMCAP_UOM sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-REMCAP_PERC sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-AVAIL_PER sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-MIN_AVAIL_PER sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-MSG_TYPE sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-MSG_CLASS sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-MSG_NBR sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-MSG_ARG1 sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-MSG_ARG2 sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-MSG_ARG3 sy-vline 
WA_ROIJ_VEHAVAIL_STATUS_STR-MSG_ARG4 sy-vline      INTO ld_text SEPARATED BY SPACE.

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