ABAP Select data from SAP table REIS_AJ_AT_EXPENSE_L into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REIS_AJ_AT_EXPENSE_L
*  INTO TABLE @DATA(IT_REIS_AJ_AT_EXPENSE_L2).
*--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_REIS_AJ_AT_EXPENSE_L INDEX 1 INTO DATA(WA_REIS_AJ_AT_EXPENSE_L2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REIS_AJ_AT_EXPENSE_L>-EXPPOSNO = 1.
<REIS_AJ_AT_EXPENSE_L>-EXPPOS = 1.
<REIS_AJ_AT_EXPENSE_L>-EXPPOSGRP = 1.
<REIS_AJ_AT_EXPENSE_L>-XEXPPOS = 1.
<REIS_AJ_AT_EXPENSE_L>-XEXPPOSGRP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REIS_AJ_AT_EXPENSE_L-EXPPOSVALIDFROM, sy-vline,
  WA_REIS_AJ_AT_EXPENSE_L-EXPPOSVALIDTO, sy-vline,
  WA_REIS_AJ_AT_EXPENSE_L-EXPPOSINFO, sy-vline,
  WA_REIS_AJ_AT_EXPENSE_L-CALCRRL, sy-vline,
  WA_REIS_AJ_AT_EXPENSE_L-EXPFINPOSAMOUNT, sy-vline,
  WA_REIS_AJ_AT_EXPENSE_L-EXPFINPOSREPAY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REIS_AJ_AT_EXPENSE_L 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_REIS_AJ_AT_EXPENSE_L 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_REIS_AJ_AT_EXPENSE_L INTO WA_REIS_AJ_AT_EXPENSE_L.


*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_REIS_AJ_AT_EXPENSE_L-EXPPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_AJ_AT_EXPENSE_L-EXPPOS.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field CALCRULEPARA2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REIS_AJ_AT_EXPENSE_L-CALCRULEPARA2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_AJ_AT_EXPENSE_L-CALCRULEPARA2.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field XCALCRULEPARA1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REIS_AJ_AT_EXPENSE_L-XCALCRULEPARA1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_AJ_AT_EXPENSE_L-XCALCRULEPARA1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field XCALCRULEPARA2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REIS_AJ_AT_EXPENSE_L-XCALCRULEPARA2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_AJ_AT_EXPENSE_L-XCALCRULEPARA2.
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_REIS_AJ_AT_EXPENSE_L_STR, 
EXPPOSNO TYPE STRING,
EXPPOS TYPE STRING,
EXPPOSGRP TYPE STRING,
XEXPPOS TYPE STRING,
XEXPPOSGRP TYPE STRING,
EXPPOSVALIDFROM TYPE STRING,
EXPPOSVALIDTO TYPE STRING,
EXPPOSINFO TYPE STRING,
CALCRRL TYPE STRING,
EXPFINPOSAMOUNT TYPE STRING,
EXPFINPOSREPAY TYPE STRING,
EXPFINPOSINTEREST TYPE STRING,
EXPFINPOSPROVIDER TYPE STRING,
EXPFINPOSLOANNO TYPE STRING,
EXPFINPOSREFLOAN TYPE STRING,
EXPOBJNR TYPE STRING,
CALCRULE TYPE STRING,
CALCRULEPARA1 TYPE STRING,
CALCRULEPARA2 TYPE STRING,
NOMINALAMOUNT TYPE STRING,
EXPFINPOS TYPE STRING,
EXPXFINPOS TYPE STRING,
EXPFINPOSGRP TYPE STRING,
EXPXFINPOSGRP TYPE STRING,
EXPFINTYPE TYPE STRING,
EXPFINPOSLOANIDENT TYPE STRING,
EXPAMOUNTYEAR TYPE STRING,
EXPAMOUNTAREAMONTH TYPE STRING,
EXPAMOUNTAREA TYPE STRING,
EXPAMOUNTAREAUNIT TYPE STRING,
EXPPOSOBJIDENT TYPE STRING,
XCALCRULE TYPE STRING,
XCALCRULEPARA1 TYPE STRING,
XCALCRULEPARA2 TYPE STRING,
OBJECTCOUNT TYPE STRING,
NOMINALAMTCALC TYPE STRING,
ISFINPLANPOS TYPE STRING,
EXPENSESOGRP TYPE STRING,
EXPENSESOPOS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REIS_AJ_AT_EXPENSE_L_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_REIS_AJ_AT_EXPENSE_L_STR-EXPPOSNO sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPPOS sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPPOSGRP sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-XEXPPOS sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-XEXPPOSGRP sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPPOSVALIDFROM sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPPOSVALIDTO sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPPOSINFO sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-CALCRRL sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPFINPOSAMOUNT sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPFINPOSREPAY sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPFINPOSINTEREST sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPFINPOSPROVIDER sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPFINPOSLOANNO sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPFINPOSREFLOAN sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPOBJNR sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-CALCRULE sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-CALCRULEPARA1 sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-CALCRULEPARA2 sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-NOMINALAMOUNT sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPFINPOS sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPXFINPOS sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPFINPOSGRP sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPXFINPOSGRP sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPFINTYPE sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPFINPOSLOANIDENT sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPAMOUNTYEAR sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPAMOUNTAREAMONTH sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPAMOUNTAREA sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPAMOUNTAREAUNIT sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPPOSOBJIDENT sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-XCALCRULE sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-XCALCRULEPARA1 sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-XCALCRULEPARA2 sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-OBJECTCOUNT sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-NOMINALAMTCALC sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-ISFINPLANPOS sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPENSESOGRP sy-vline 
WA_REIS_AJ_AT_EXPENSE_L_STR-EXPENSESOPOS sy-vline      INTO ld_text SEPARATED BY SPACE.

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