ABAP Select data from SAP table VIAJAT into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VIAJAT 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 VIAJAT. 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 VIAJAT 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_VIAJAT TYPE STANDARD TABLE OF VIAJAT,
      WA_VIAJAT TYPE VIAJAT,
      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: <VIAJAT> TYPE VIAJAT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VIAJAT
*  INTO TABLE @DATA(IT_VIAJAT2).
*--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_VIAJAT INDEX 1 INTO DATA(WA_VIAJAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VIAJAT>-MANDT = 1.
<VIAJAT>-INTRENO = 1.
<VIAJAT>-ADJMTASKID = 1.
<VIAJAT>-OBJNR = 1.
<VIAJAT>-CREATIONTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VIAJAT-RERF, sy-vline,
  WA_VIAJAT-DERF, sy-vline,
  WA_VIAJAT-TERF, sy-vline,
  WA_VIAJAT-REHER, sy-vline,
  WA_VIAJAT-RBEAR, sy-vline,
  WA_VIAJAT-DBEAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VIAJAT 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_VIAJAT 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_VIAJAT INTO WA_VIAJAT.


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

*Conversion exit REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_VIAJAT-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAJAT-VALIDTO.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit REDAT, internal->external for field VALIDTOPLAN
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_VIAJAT-VALIDTOPLAN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAJAT-VALIDTOPLAN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field VALIDTOACT
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_VIAJAT-VALIDTOACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAJAT-VALIDTOACT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SWENR, internal->external for field BENO
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_VIAJAT-BENO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAJAT-BENO.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field EARMARKING
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VIAJAT-EARMARKING
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAJAT-EARMARKING.
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_VIAJAT_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
ADJMTASKID TYPE STRING,
OBJNR TYPE STRING,
CREATIONTYPE TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
RBEAR TYPE STRING,
DBEAR TYPE STRING,
TBEAR TYPE STRING,
RBHER TYPE STRING,
RESPONSIBLE TYPE STRING,
USEREXCLUSIVE TYPE STRING,
AUTHGRP TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
ADJMTASKTYPE TYPE STRING,
XADJMTASK TYPE STRING,
SUPERADJMTASKID TYPE STRING,
ADJMRULE TYPE STRING,
BUKRS TYPE STRING,
VALIDFROMPLAN TYPE STRING,
VALIDTOPLAN TYPE STRING,
VALIDFROMACT TYPE STRING,
VALIDTOACT TYPE STRING,
CURRENCY TYPE STRING,
BENO TYPE STRING,
ACTIVATEONPLAN TYPE STRING,
ACTIVATEONACT TYPE STRING,
AFFCNIND TYPE STRING,
DOWAIVERCD TYPE STRING,
ATMEAS TYPE STRING,
ATMEASUNIT TYPE STRING,
AMMULMEAS TYPE STRING,
AMMULMEASUNIT TYPE STRING,
ISCOSTSPOSA TYPE STRING,
ISSUPERADJMTASK TYPE STRING,
ISPLANFILLED TYPE STRING,
HASMULTIASSIGN TYPE STRING,
USAGEGROUP TYPE STRING,
TASKSTATUS TYPE STRING,
EARMARKING TYPE STRING,
RRLPERCENT TYPE STRING,
WBAUPRG TYPE STRING,
XNUTZWERK TYPE STRING,
XIHMA TYPE STRING,
DBINDBIS TYPE STRING,
BEZFERTIG TYPE STRING,
ATFIRSTADJMFROM TYPE STRING,
PROCESSCEAGUID TYPE STRING,
PERCENTINCR TYPE STRING,
PSARCHIVEDTO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VIAJAT_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_VIAJAT_STR-MANDT sy-vline 
WA_VIAJAT_STR-INTRENO sy-vline 
WA_VIAJAT_STR-ADJMTASKID sy-vline 
WA_VIAJAT_STR-OBJNR sy-vline 
WA_VIAJAT_STR-CREATIONTYPE sy-vline 
WA_VIAJAT_STR-RERF sy-vline 
WA_VIAJAT_STR-DERF sy-vline 
WA_VIAJAT_STR-TERF sy-vline 
WA_VIAJAT_STR-REHER sy-vline 
WA_VIAJAT_STR-RBEAR sy-vline 
WA_VIAJAT_STR-DBEAR sy-vline 
WA_VIAJAT_STR-TBEAR sy-vline 
WA_VIAJAT_STR-RBHER sy-vline 
WA_VIAJAT_STR-RESPONSIBLE sy-vline 
WA_VIAJAT_STR-USEREXCLUSIVE sy-vline 
WA_VIAJAT_STR-AUTHGRP sy-vline 
WA_VIAJAT_STR-VALIDFROM sy-vline 
WA_VIAJAT_STR-VALIDTO sy-vline 
WA_VIAJAT_STR-ADJMTASKTYPE sy-vline 
WA_VIAJAT_STR-XADJMTASK sy-vline 
WA_VIAJAT_STR-SUPERADJMTASKID sy-vline 
WA_VIAJAT_STR-ADJMRULE sy-vline 
WA_VIAJAT_STR-BUKRS sy-vline 
WA_VIAJAT_STR-VALIDFROMPLAN sy-vline 
WA_VIAJAT_STR-VALIDTOPLAN sy-vline 
WA_VIAJAT_STR-VALIDFROMACT sy-vline 
WA_VIAJAT_STR-VALIDTOACT sy-vline 
WA_VIAJAT_STR-CURRENCY sy-vline 
WA_VIAJAT_STR-BENO sy-vline 
WA_VIAJAT_STR-ACTIVATEONPLAN sy-vline 
WA_VIAJAT_STR-ACTIVATEONACT sy-vline 
WA_VIAJAT_STR-AFFCNIND sy-vline 
WA_VIAJAT_STR-DOWAIVERCD sy-vline 
WA_VIAJAT_STR-ATMEAS sy-vline 
WA_VIAJAT_STR-ATMEASUNIT sy-vline 
WA_VIAJAT_STR-AMMULMEAS sy-vline 
WA_VIAJAT_STR-AMMULMEASUNIT sy-vline 
WA_VIAJAT_STR-ISCOSTSPOSA sy-vline 
WA_VIAJAT_STR-ISSUPERADJMTASK sy-vline 
WA_VIAJAT_STR-ISPLANFILLED sy-vline 
WA_VIAJAT_STR-HASMULTIASSIGN sy-vline 
WA_VIAJAT_STR-USAGEGROUP sy-vline 
WA_VIAJAT_STR-TASKSTATUS sy-vline 
WA_VIAJAT_STR-EARMARKING sy-vline 
WA_VIAJAT_STR-RRLPERCENT sy-vline 
WA_VIAJAT_STR-WBAUPRG sy-vline 
WA_VIAJAT_STR-XNUTZWERK sy-vline 
WA_VIAJAT_STR-XIHMA sy-vline 
WA_VIAJAT_STR-DBINDBIS sy-vline 
WA_VIAJAT_STR-BEZFERTIG sy-vline 
WA_VIAJAT_STR-ATFIRSTADJMFROM sy-vline 
WA_VIAJAT_STR-PROCESSCEAGUID sy-vline 
WA_VIAJAT_STR-PERCENTINCR sy-vline 
WA_VIAJAT_STR-PSARCHIVEDTO sy-vline      INTO ld_text SEPARATED BY SPACE.

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