ABAP Select data from SAP table ROIJ_VEH_AVAIL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ROIJ_VEH_AVAIL 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_VEH_AVAIL. 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_VEH_AVAIL 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_VEH_AVAIL TYPE STANDARD TABLE OF ROIJ_VEH_AVAIL,
      WA_ROIJ_VEH_AVAIL TYPE ROIJ_VEH_AVAIL,
      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_VEH_AVAIL> TYPE ROIJ_VEH_AVAIL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIJ_VEH_AVAIL
*  INTO TABLE @DATA(IT_ROIJ_VEH_AVAIL2).
*--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_VEH_AVAIL INDEX 1 INTO DATA(WA_ROIJ_VEH_AVAIL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIJ_VEH_AVAIL>-VEHICLE = 1.
<ROIJ_VEH_AVAIL>-PRNOMTK = 1.
<ROIJ_VEH_AVAIL>-PRNOMNR = 1.
<ROIJ_VEH_AVAIL>-PRPOT_DEP_DATE = 1.
<ROIJ_VEH_AVAIL>-PRLOCID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIJ_VEH_AVAIL-POT_DEP_DATE, sy-vline,
  WA_ROIJ_VEH_AVAIL-CRNOMTK, sy-vline,
  WA_ROIJ_VEH_AVAIL-CRNOMNR, sy-vline,
  WA_ROIJ_VEH_AVAIL-CRLOCID, sy-vline,
  WA_ROIJ_VEH_AVAIL-CRLOC_ATTR, sy-vline,
  WA_ROIJ_VEH_AVAIL-CRNMFRDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIJ_VEH_AVAIL 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_VEH_AVAIL 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_VEH_AVAIL INTO WA_ROIJ_VEH_AVAIL.


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

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

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

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

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIJ_VEH_AVAIL-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJ_VEH_AVAIL-VBELN.
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_VEH_AVAIL_STR, 
VEHICLE TYPE STRING,
PRNOMTK TYPE STRING,
PRNOMNR TYPE STRING,
PRPOT_DEP_DATE TYPE STRING,
PRLOCID TYPE STRING,
POT_DEP_DATE TYPE STRING,
CRNOMTK TYPE STRING,
CRNOMNR TYPE STRING,
CRLOCID TYPE STRING,
CRLOC_ATTR TYPE STRING,
CRNMFRDT TYPE STRING,
CRNMFRTM TYPE STRING,
CRNMTODT TYPE STRING,
CRNMTOTM TYPE STRING,
NXLOCID TYPE STRING,
NXLOC_ATTR TYPE STRING,
NXARDT TYPE STRING,
NXNOMTK TYPE STRING,
NXNOMNR TYPE STRING,
VBELN TYPE STRING,
VBTYP TYPE STRING,
POSNR TYPE STRING,
SINGLE_VOY TYPE STRING,
VEH_AVAIL_FR_DATE TYPE STRING,
VEH_AVAIL_FR_TIME TYPE STRING,
VEH_AVAIL_TO_DATE TYPE STRING,
VEH_AVAIL_TO_TIME TYPE STRING,
VAL_FROM TYPE STRING,
VAL_TO TYPE STRING,
VEH_TYPE TYPE STRING,
STFXNR TYPE STRING,
DECL TYPE STRING,
DECL_QU TYPE STRING,
TOL_MIN TYPE STRING,
TOL_MAX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIJ_VEH_AVAIL_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_VEH_AVAIL_STR-VEHICLE sy-vline 
WA_ROIJ_VEH_AVAIL_STR-PRNOMTK sy-vline 
WA_ROIJ_VEH_AVAIL_STR-PRNOMNR sy-vline 
WA_ROIJ_VEH_AVAIL_STR-PRPOT_DEP_DATE sy-vline 
WA_ROIJ_VEH_AVAIL_STR-PRLOCID sy-vline 
WA_ROIJ_VEH_AVAIL_STR-POT_DEP_DATE sy-vline 
WA_ROIJ_VEH_AVAIL_STR-CRNOMTK sy-vline 
WA_ROIJ_VEH_AVAIL_STR-CRNOMNR sy-vline 
WA_ROIJ_VEH_AVAIL_STR-CRLOCID sy-vline 
WA_ROIJ_VEH_AVAIL_STR-CRLOC_ATTR sy-vline 
WA_ROIJ_VEH_AVAIL_STR-CRNMFRDT sy-vline 
WA_ROIJ_VEH_AVAIL_STR-CRNMFRTM sy-vline 
WA_ROIJ_VEH_AVAIL_STR-CRNMTODT sy-vline 
WA_ROIJ_VEH_AVAIL_STR-CRNMTOTM sy-vline 
WA_ROIJ_VEH_AVAIL_STR-NXLOCID sy-vline 
WA_ROIJ_VEH_AVAIL_STR-NXLOC_ATTR sy-vline 
WA_ROIJ_VEH_AVAIL_STR-NXARDT sy-vline 
WA_ROIJ_VEH_AVAIL_STR-NXNOMTK sy-vline 
WA_ROIJ_VEH_AVAIL_STR-NXNOMNR sy-vline 
WA_ROIJ_VEH_AVAIL_STR-VBELN sy-vline 
WA_ROIJ_VEH_AVAIL_STR-VBTYP sy-vline 
WA_ROIJ_VEH_AVAIL_STR-POSNR sy-vline 
WA_ROIJ_VEH_AVAIL_STR-SINGLE_VOY sy-vline 
WA_ROIJ_VEH_AVAIL_STR-VEH_AVAIL_FR_DATE sy-vline 
WA_ROIJ_VEH_AVAIL_STR-VEH_AVAIL_FR_TIME sy-vline 
WA_ROIJ_VEH_AVAIL_STR-VEH_AVAIL_TO_DATE sy-vline 
WA_ROIJ_VEH_AVAIL_STR-VEH_AVAIL_TO_TIME sy-vline 
WA_ROIJ_VEH_AVAIL_STR-VAL_FROM sy-vline 
WA_ROIJ_VEH_AVAIL_STR-VAL_TO sy-vline 
WA_ROIJ_VEH_AVAIL_STR-VEH_TYPE sy-vline 
WA_ROIJ_VEH_AVAIL_STR-STFXNR sy-vline 
WA_ROIJ_VEH_AVAIL_STR-DECL sy-vline 
WA_ROIJ_VEH_AVAIL_STR-DECL_QU sy-vline 
WA_ROIJ_VEH_AVAIL_STR-TOL_MIN sy-vline 
WA_ROIJ_VEH_AVAIL_STR-TOL_MAX sy-vline      INTO ld_text SEPARATED BY SPACE.

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