ABAP Select data from SAP table VIAJRULE_TAB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VIAJRULE_TAB
*  INTO TABLE @DATA(IT_VIAJRULE_TAB2).
*--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_VIAJRULE_TAB INDEX 1 INTO DATA(WA_VIAJRULE_TAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VIAJRULE_TAB>-VALIDTO = 1.
<VIAJRULE_TAB>-ADJMMETH = 1.
<VIAJRULE_TAB>-ISRULECOMB = 1.
<VIAJRULE_TAB>-ISPARTCOMB = 1.
<VIAJRULE_TAB>-APPROVAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VIAJRULE_TAB-ACTIFNOAPPR, sy-vline,
  WA_VIAJRULE_TAB-DTCHANGEABLE, sy-vline,
  WA_VIAJRULE_TAB-PERCENTAGEPASS, sy-vline,
  WA_VIAJRULE_TAB-USERORATEINC, sy-vline,
  WA_VIAJRULE_TAB-ADJMDIRECTION, sy-vline,
  WA_VIAJRULE_TAB-CHANGEDIRECTION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VIAJRULE_TAB 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_VIAJRULE_TAB 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_VIAJRULE_TAB INTO WA_VIAJRULE_TAB.


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

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

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

*Conversion exit ALPHA, internal->external for field DEPCONDTYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VIAJRULE_TAB-DEPCONDTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAJRULE_TAB-DEPCONDTYPE.
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_VIAJRULE_TAB_STR, 
VALIDTO TYPE STRING,
ADJMMETH TYPE STRING,
ISRULECOMB TYPE STRING,
ISPARTCOMB TYPE STRING,
APPROVAL TYPE STRING,
ACTIFNOAPPR TYPE STRING,
DTCHANGEABLE TYPE STRING,
PERCENTAGEPASS TYPE STRING,
USERORATEINC TYPE STRING,
ADJMDIRECTION TYPE STRING,
CHANGEDIRECTION TYPE STRING,
RHYTHM TYPE STRING,
RHYTHMUNIT TYPE STRING,
RHYTHMBEGIN TYPE STRING,
SIMULATIONRULE TYPE STRING,
NODOCUMENT TYPE STRING,
RULECHANGEABLE TYPE STRING,
FADJMDIRECTION TYPE STRING,
FPERCENTAGEPASS TYPE STRING,
FUSERORATEINC TYPE STRING,
FRHYTHM TYPE STRING,
FRHYTHMUNIT TYPE STRING,
FRHYTHMBEGIN TYPE STRING,
FSIMULATIONRULE TYPE STRING,
FNODOCUMENT TYPE STRING,
FAPPROVAL TYPE STRING,
FACTIFNOAPPR TYPE STRING,
FDTCHANGEABLE TYPE STRING,
FCHANGEDIRECTION TYPE STRING,
RULEEXPAND TYPE STRING,
ADJMCOTYPE TYPE STRING,
FADJMCOTYPE TYPE STRING,
NEXTADJMNOTICE TYPE STRING,
FNEXTADJMNOTICE TYPE STRING,
ADJMBASE TYPE STRING,
FADJMBASE TYPE STRING,
ISRHYTHMMINDIST TYPE STRING,
FISRHYTHMMINDIST TYPE STRING,
SIMDISABLED TYPE STRING,
EXEDISABLED TYPE STRING,
REVDISABLED TYPE STRING,
AUTODEFAULT TYPE STRING,
ANNOUNCE TYPE STRING,
FANNOUNCE TYPE STRING,
BLOCKREASON TYPE STRING,
FBLOCKREASON TYPE STRING,
RULEORDER TYPE STRING,
CTRULE TYPE STRING,
FCTRULE TYPE STRING,
TIMEDEPTYPE TYPE STRING,
FTIMEDEPTYPE TYPE STRING,
DDUPMANDATORY TYPE STRING,
DEPCONDTYPE TYPE STRING,
FDEPCONDTYPE TYPE STRING,
NORETROACTIVE TYPE STRING,
FNORETROACTIVE TYPE STRING,
SPECIFICFIELD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VIAJRULE_TAB_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_VIAJRULE_TAB_STR-VALIDTO sy-vline 
WA_VIAJRULE_TAB_STR-ADJMMETH sy-vline 
WA_VIAJRULE_TAB_STR-ISRULECOMB sy-vline 
WA_VIAJRULE_TAB_STR-ISPARTCOMB sy-vline 
WA_VIAJRULE_TAB_STR-APPROVAL sy-vline 
WA_VIAJRULE_TAB_STR-ACTIFNOAPPR sy-vline 
WA_VIAJRULE_TAB_STR-DTCHANGEABLE sy-vline 
WA_VIAJRULE_TAB_STR-PERCENTAGEPASS sy-vline 
WA_VIAJRULE_TAB_STR-USERORATEINC sy-vline 
WA_VIAJRULE_TAB_STR-ADJMDIRECTION sy-vline 
WA_VIAJRULE_TAB_STR-CHANGEDIRECTION sy-vline 
WA_VIAJRULE_TAB_STR-RHYTHM sy-vline 
WA_VIAJRULE_TAB_STR-RHYTHMUNIT sy-vline 
WA_VIAJRULE_TAB_STR-RHYTHMBEGIN sy-vline 
WA_VIAJRULE_TAB_STR-SIMULATIONRULE sy-vline 
WA_VIAJRULE_TAB_STR-NODOCUMENT sy-vline 
WA_VIAJRULE_TAB_STR-RULECHANGEABLE sy-vline 
WA_VIAJRULE_TAB_STR-FADJMDIRECTION sy-vline 
WA_VIAJRULE_TAB_STR-FPERCENTAGEPASS sy-vline 
WA_VIAJRULE_TAB_STR-FUSERORATEINC sy-vline 
WA_VIAJRULE_TAB_STR-FRHYTHM sy-vline 
WA_VIAJRULE_TAB_STR-FRHYTHMUNIT sy-vline 
WA_VIAJRULE_TAB_STR-FRHYTHMBEGIN sy-vline 
WA_VIAJRULE_TAB_STR-FSIMULATIONRULE sy-vline 
WA_VIAJRULE_TAB_STR-FNODOCUMENT sy-vline 
WA_VIAJRULE_TAB_STR-FAPPROVAL sy-vline 
WA_VIAJRULE_TAB_STR-FACTIFNOAPPR sy-vline 
WA_VIAJRULE_TAB_STR-FDTCHANGEABLE sy-vline 
WA_VIAJRULE_TAB_STR-FCHANGEDIRECTION sy-vline 
WA_VIAJRULE_TAB_STR-RULEEXPAND sy-vline 
WA_VIAJRULE_TAB_STR-ADJMCOTYPE sy-vline 
WA_VIAJRULE_TAB_STR-FADJMCOTYPE sy-vline 
WA_VIAJRULE_TAB_STR-NEXTADJMNOTICE sy-vline 
WA_VIAJRULE_TAB_STR-FNEXTADJMNOTICE sy-vline 
WA_VIAJRULE_TAB_STR-ADJMBASE sy-vline 
WA_VIAJRULE_TAB_STR-FADJMBASE sy-vline 
WA_VIAJRULE_TAB_STR-ISRHYTHMMINDIST sy-vline 
WA_VIAJRULE_TAB_STR-FISRHYTHMMINDIST sy-vline 
WA_VIAJRULE_TAB_STR-SIMDISABLED sy-vline 
WA_VIAJRULE_TAB_STR-EXEDISABLED sy-vline 
WA_VIAJRULE_TAB_STR-REVDISABLED sy-vline 
WA_VIAJRULE_TAB_STR-AUTODEFAULT sy-vline 
WA_VIAJRULE_TAB_STR-ANNOUNCE sy-vline 
WA_VIAJRULE_TAB_STR-FANNOUNCE sy-vline 
WA_VIAJRULE_TAB_STR-BLOCKREASON sy-vline 
WA_VIAJRULE_TAB_STR-FBLOCKREASON sy-vline 
WA_VIAJRULE_TAB_STR-RULEORDER sy-vline 
WA_VIAJRULE_TAB_STR-CTRULE sy-vline 
WA_VIAJRULE_TAB_STR-FCTRULE sy-vline 
WA_VIAJRULE_TAB_STR-TIMEDEPTYPE sy-vline 
WA_VIAJRULE_TAB_STR-FTIMEDEPTYPE sy-vline 
WA_VIAJRULE_TAB_STR-DDUPMANDATORY sy-vline 
WA_VIAJRULE_TAB_STR-DEPCONDTYPE sy-vline 
WA_VIAJRULE_TAB_STR-FDEPCONDTYPE sy-vline 
WA_VIAJRULE_TAB_STR-NORETROACTIVE sy-vline 
WA_VIAJRULE_TAB_STR-FNORETROACTIVE sy-vline 
WA_VIAJRULE_TAB_STR-SPECIFICFIELD sy-vline      INTO ld_text SEPARATED BY SPACE.

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