ABAP Select data from SAP table A2VIAJRULE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP A2VIAJRULE 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 A2VIAJRULE. 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 A2VIAJRULE 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_A2VIAJRULE TYPE STANDARD TABLE OF A2VIAJRULE,
      WA_A2VIAJRULE TYPE A2VIAJRULE,
      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: <A2VIAJRULE> TYPE A2VIAJRULE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_A2VIAJRULE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM A2VIAJRULE
  INTO TABLE IT_A2VIAJRULE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM A2VIAJRULE
*  INTO TABLE @DATA(IT_A2VIAJRULE2).
*--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_A2VIAJRULE INDEX 1 INTO DATA(WA_A2VIAJRULE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_A2VIAJRULE ASSIGNING <A2VIAJRULE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<A2VIAJRULE>-MANDT = 1.
<A2VIAJRULE>-INTRENO = 1.
<A2VIAJRULE>-TERMNO = 1.
<A2VIAJRULE>-ADJMRULE = 1.
<A2VIAJRULE>-ADJMSUBRULE = 1.

ENDLOOP.

LOOP AT IT_A2VIAJRULE INTO WA_A2VIAJRULE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_A2VIAJRULE-VALIDFROM, sy-vline,
  WA_A2VIAJRULE-VALIDTO, sy-vline,
  WA_A2VIAJRULE-ADJMMETH, sy-vline,
  WA_A2VIAJRULE-ISRULECOMB, sy-vline,
  WA_A2VIAJRULE-ISPARTCOMB, sy-vline,
  WA_A2VIAJRULE-APPROVAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_A2VIAJRULE 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_A2VIAJRULE 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_A2VIAJRULE INTO WA_A2VIAJRULE.


*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 TERMNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_A2VIAJRULE-TERMNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_A2VIAJRULE-TERMNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADJMRULE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_A2VIAJRULE-ADJMRULE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_A2VIAJRULE-ADJMRULE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADJMSUBRULE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_A2VIAJRULE-ADJMSUBRULE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_A2VIAJRULE-ADJMSUBRULE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_A2VIAJRULE-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_A2VIAJRULE-VALIDTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADJMMETH
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_A2VIAJRULE-ADJMMETH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_A2VIAJRULE-ADJMMETH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BLOCKREASON
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_A2VIAJRULE-BLOCKREASON
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_A2VIAJRULE-BLOCKREASON.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DEPCONDTYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_A2VIAJRULE-DEPCONDTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_A2VIAJRULE-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_A2VIAJRULE_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
TERMNO TYPE STRING,
ADJMRULE TYPE STRING,
ADJMSUBRULE TYPE STRING,
VALIDFROM TYPE STRING,
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,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_A2VIAJRULE_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_A2VIAJRULE_STR-MANDT sy-vline 
WA_A2VIAJRULE_STR-INTRENO sy-vline 
WA_A2VIAJRULE_STR-TERMNO sy-vline 
WA_A2VIAJRULE_STR-ADJMRULE sy-vline 
WA_A2VIAJRULE_STR-ADJMSUBRULE sy-vline 
WA_A2VIAJRULE_STR-VALIDFROM sy-vline 
WA_A2VIAJRULE_STR-VALIDTO sy-vline 
WA_A2VIAJRULE_STR-ADJMMETH sy-vline 
WA_A2VIAJRULE_STR-ISRULECOMB sy-vline 
WA_A2VIAJRULE_STR-ISPARTCOMB sy-vline 
WA_A2VIAJRULE_STR-APPROVAL sy-vline 
WA_A2VIAJRULE_STR-ACTIFNOAPPR sy-vline 
WA_A2VIAJRULE_STR-DTCHANGEABLE sy-vline 
WA_A2VIAJRULE_STR-PERCENTAGEPASS sy-vline 
WA_A2VIAJRULE_STR-USERORATEINC sy-vline 
WA_A2VIAJRULE_STR-ADJMDIRECTION sy-vline 
WA_A2VIAJRULE_STR-CHANGEDIRECTION sy-vline 
WA_A2VIAJRULE_STR-RHYTHM sy-vline 
WA_A2VIAJRULE_STR-RHYTHMUNIT sy-vline 
WA_A2VIAJRULE_STR-RHYTHMBEGIN sy-vline 
WA_A2VIAJRULE_STR-SIMULATIONRULE sy-vline 
WA_A2VIAJRULE_STR-NODOCUMENT sy-vline 
WA_A2VIAJRULE_STR-RULECHANGEABLE sy-vline 
WA_A2VIAJRULE_STR-FADJMDIRECTION sy-vline 
WA_A2VIAJRULE_STR-FPERCENTAGEPASS sy-vline 
WA_A2VIAJRULE_STR-FUSERORATEINC sy-vline 
WA_A2VIAJRULE_STR-FRHYTHM sy-vline 
WA_A2VIAJRULE_STR-FRHYTHMUNIT sy-vline 
WA_A2VIAJRULE_STR-FRHYTHMBEGIN sy-vline 
WA_A2VIAJRULE_STR-FSIMULATIONRULE sy-vline 
WA_A2VIAJRULE_STR-FNODOCUMENT sy-vline 
WA_A2VIAJRULE_STR-FAPPROVAL sy-vline 
WA_A2VIAJRULE_STR-FACTIFNOAPPR sy-vline 
WA_A2VIAJRULE_STR-FDTCHANGEABLE sy-vline 
WA_A2VIAJRULE_STR-FCHANGEDIRECTION sy-vline 
WA_A2VIAJRULE_STR-RULEEXPAND sy-vline 
WA_A2VIAJRULE_STR-ADJMCOTYPE sy-vline 
WA_A2VIAJRULE_STR-FADJMCOTYPE sy-vline 
WA_A2VIAJRULE_STR-NEXTADJMNOTICE sy-vline 
WA_A2VIAJRULE_STR-FNEXTADJMNOTICE sy-vline 
WA_A2VIAJRULE_STR-ADJMBASE sy-vline 
WA_A2VIAJRULE_STR-FADJMBASE sy-vline 
WA_A2VIAJRULE_STR-ISRHYTHMMINDIST sy-vline 
WA_A2VIAJRULE_STR-FISRHYTHMMINDIST sy-vline 
WA_A2VIAJRULE_STR-SIMDISABLED sy-vline 
WA_A2VIAJRULE_STR-EXEDISABLED sy-vline 
WA_A2VIAJRULE_STR-REVDISABLED sy-vline 
WA_A2VIAJRULE_STR-AUTODEFAULT sy-vline 
WA_A2VIAJRULE_STR-ANNOUNCE sy-vline 
WA_A2VIAJRULE_STR-FANNOUNCE sy-vline 
WA_A2VIAJRULE_STR-BLOCKREASON sy-vline 
WA_A2VIAJRULE_STR-FBLOCKREASON sy-vline 
WA_A2VIAJRULE_STR-RULEORDER sy-vline 
WA_A2VIAJRULE_STR-CTRULE sy-vline 
WA_A2VIAJRULE_STR-FCTRULE sy-vline 
WA_A2VIAJRULE_STR-TIMEDEPTYPE sy-vline 
WA_A2VIAJRULE_STR-FTIMEDEPTYPE sy-vline 
WA_A2VIAJRULE_STR-DDUPMANDATORY sy-vline 
WA_A2VIAJRULE_STR-DEPCONDTYPE sy-vline 
WA_A2VIAJRULE_STR-FDEPCONDTYPE sy-vline 
WA_A2VIAJRULE_STR-NORETROACTIVE sy-vline 
WA_A2VIAJRULE_STR-FNORETROACTIVE sy-vline 
WA_A2VIAJRULE_STR-SPECIFICFIELD sy-vline 
WA_A2VIAJRULE_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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