ABAP Select data from SAP table AVIAJEXPENSE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AVIAJEXPENSE
*  INTO TABLE @DATA(IT_AVIAJEXPENSE2).
*--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_AVIAJEXPENSE INDEX 1 INTO DATA(WA_AVIAJEXPENSE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AVIAJEXPENSE>-MANDT = 1.
<AVIAJEXPENSE>-EXPPOSGUID = 1.
<AVIAJEXPENSE>-INTRENO = 1.
<AVIAJEXPENSE>-EXPPOS = 1.
<AVIAJEXPENSE>-EXPPOSNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AVIAJEXPENSE-EXPPOSVALIDFROM, sy-vline,
  WA_AVIAJEXPENSE-EXPPOSVALIDTO, sy-vline,
  WA_AVIAJEXPENSE-EXPPOSINFO, sy-vline,
  WA_AVIAJEXPENSE-CALCRRL, sy-vline,
  WA_AVIAJEXPENSE-FINPOSGUID, sy-vline,
  WA_AVIAJEXPENSE-FINPOSAMOUNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AVIAJEXPENSE 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_AVIAJEXPENSE 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_AVIAJEXPENSE INTO WA_AVIAJEXPENSE.


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

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

*Conversion exit RECUP, internal->external for field FINPOSAMOUNT
CALL FUNCTION 'CONVERSION_EXIT_RECUP_OUTPUT'
  EXPORTING
    input =                      WA_AVIAJEXPENSE-FINPOSAMOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVIAJEXPENSE-FINPOSAMOUNT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field CALCRULEPARA1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AVIAJEXPENSE-CALCRULEPARA1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVIAJEXPENSE-CALCRULEPARA1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CALCRULEPARA2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AVIAJEXPENSE-CALCRULEPARA2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVIAJEXPENSE-CALCRULEPARA2.
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_AVIAJEXPENSE_STR, 
MANDT TYPE STRING,
EXPPOSGUID TYPE STRING,
INTRENO TYPE STRING,
EXPPOS TYPE STRING,
EXPPOSNO TYPE STRING,
EXPPOSVALIDFROM TYPE STRING,
EXPPOSVALIDTO TYPE STRING,
EXPPOSINFO TYPE STRING,
CALCRRL TYPE STRING,
FINPOSGUID TYPE STRING,
FINPOSAMOUNT TYPE STRING,
FINPOSREPAY TYPE STRING,
FINPOSINTEREST TYPE STRING,
FINPOSPROVIDER TYPE STRING,
FINPOSLOANNO TYPE STRING,
FINPOSREFLOAN TYPE STRING,
OBJNR TYPE STRING,
CALCRULE TYPE STRING,
CALCRULEPARA1 TYPE STRING,
CALCRULEPARA2 TYPE STRING,
NOMINALAMOUNT TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AVIAJEXPENSE_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_AVIAJEXPENSE_STR-MANDT sy-vline 
WA_AVIAJEXPENSE_STR-EXPPOSGUID sy-vline 
WA_AVIAJEXPENSE_STR-INTRENO sy-vline 
WA_AVIAJEXPENSE_STR-EXPPOS sy-vline 
WA_AVIAJEXPENSE_STR-EXPPOSNO sy-vline 
WA_AVIAJEXPENSE_STR-EXPPOSVALIDFROM sy-vline 
WA_AVIAJEXPENSE_STR-EXPPOSVALIDTO sy-vline 
WA_AVIAJEXPENSE_STR-EXPPOSINFO sy-vline 
WA_AVIAJEXPENSE_STR-CALCRRL sy-vline 
WA_AVIAJEXPENSE_STR-FINPOSGUID sy-vline 
WA_AVIAJEXPENSE_STR-FINPOSAMOUNT sy-vline 
WA_AVIAJEXPENSE_STR-FINPOSREPAY sy-vline 
WA_AVIAJEXPENSE_STR-FINPOSINTEREST sy-vline 
WA_AVIAJEXPENSE_STR-FINPOSPROVIDER sy-vline 
WA_AVIAJEXPENSE_STR-FINPOSLOANNO sy-vline 
WA_AVIAJEXPENSE_STR-FINPOSREFLOAN sy-vline 
WA_AVIAJEXPENSE_STR-OBJNR sy-vline 
WA_AVIAJEXPENSE_STR-CALCRULE sy-vline 
WA_AVIAJEXPENSE_STR-CALCRULEPARA1 sy-vline 
WA_AVIAJEXPENSE_STR-CALCRULEPARA2 sy-vline 
WA_AVIAJEXPENSE_STR-NOMINALAMOUNT sy-vline 
WA_AVIAJEXPENSE_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.