ABAP Select data from SAP table REVALC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REVALC
*  INTO TABLE @DATA(IT_REVALC2).
*--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_REVALC INDEX 1 INTO DATA(WA_REVALC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REVALC>-BUKRS = 1.
<REVALC>-RANL = 1.
<REVALC>-RLDEPO = 1.
<REVALC>-DUMMY1 = 1.
<REVALC>-DUMMY2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REVALC-DUMMY3, sy-vline,
  WA_REVALC-DUMMY4, sy-vline,
  WA_REVALC-DUMMY5, sy-vline,
  WA_REVALC-DUMMY6, sy-vline,
  WA_REVALC-SBWHR, sy-vline,
  WA_REVALC-SHWHR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REVALC 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_REVALC 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_REVALC INTO WA_REVALC.


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

*Conversion exit EXCRT, internal->external for field DUMMY1
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_REVALC-DUMMY1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVALC-DUMMY1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field DUMMY2
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_REVALC-DUMMY2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVALC-DUMMY2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field DUMMY3
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_REVALC-DUMMY3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVALC-DUMMY3.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field DUMMY4
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_REVALC-DUMMY4
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVALC-DUMMY4.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field DUMMY5
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_REVALC-DUMMY5
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVALC-DUMMY5.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field DUMMY6
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_REVALC-DUMMY6
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVALC-DUMMY6.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field DUMMY7
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_REVALC-DUMMY7
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVALC-DUMMY7.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field DUMMY8
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_REVALC-DUMMY8
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVALC-DUMMY8.
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_REVALC_STR, 
BUKRS TYPE STRING,
RANL TYPE STRING,
RLDEPO TYPE STRING,
DUMMY1 TYPE STRING,
DUMMY2 TYPE STRING,
DUMMY3 TYPE STRING,
DUMMY4 TYPE STRING,
DUMMY5 TYPE STRING,
DUMMY6 TYPE STRING,
SBWHR TYPE STRING,
SHWHR TYPE STRING,
FW_TAGWERT TYPE STRING,
FW_TA1WERT TYPE STRING,
DUMMY7 TYPE STRING,
DUMMY8 TYPE STRING,
HW_TAGWERT TYPE STRING,
HW_TA1WERT TYPE STRING,
FW_ANKURS TYPE STRING,
FW_BUKURS TYPE STRING,
FW_HWAN TYPE STRING,
FW_HWBU TYPE STRING,
FW_TAGKURS TYPE STRING,
FW_TA1KURS TYPE STRING,
HW_TAGKURS TYPE STRING,
HW_TA1KURS TYPE STRING,
FW_ANKURSK TYPE STRING,
FW_BUKURSK TYPE STRING,
FW_HWANK TYPE STRING,
FW_HWBUK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REVALC_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_REVALC_STR-BUKRS sy-vline 
WA_REVALC_STR-RANL sy-vline 
WA_REVALC_STR-RLDEPO sy-vline 
WA_REVALC_STR-DUMMY1 sy-vline 
WA_REVALC_STR-DUMMY2 sy-vline 
WA_REVALC_STR-DUMMY3 sy-vline 
WA_REVALC_STR-DUMMY4 sy-vline 
WA_REVALC_STR-DUMMY5 sy-vline 
WA_REVALC_STR-DUMMY6 sy-vline 
WA_REVALC_STR-SBWHR sy-vline 
WA_REVALC_STR-SHWHR sy-vline 
WA_REVALC_STR-FW_TAGWERT sy-vline 
WA_REVALC_STR-FW_TA1WERT sy-vline 
WA_REVALC_STR-DUMMY7 sy-vline 
WA_REVALC_STR-DUMMY8 sy-vline 
WA_REVALC_STR-HW_TAGWERT sy-vline 
WA_REVALC_STR-HW_TA1WERT sy-vline 
WA_REVALC_STR-FW_ANKURS sy-vline 
WA_REVALC_STR-FW_BUKURS sy-vline 
WA_REVALC_STR-FW_HWAN sy-vline 
WA_REVALC_STR-FW_HWBU sy-vline 
WA_REVALC_STR-FW_TAGKURS sy-vline 
WA_REVALC_STR-FW_TA1KURS sy-vline 
WA_REVALC_STR-HW_TAGKURS sy-vline 
WA_REVALC_STR-HW_TA1KURS sy-vline 
WA_REVALC_STR-FW_ANKURSK sy-vline 
WA_REVALC_STR-FW_BUKURSK sy-vline 
WA_REVALC_STR-FW_HWANK sy-vline 
WA_REVALC_STR-FW_HWBUK sy-vline      INTO ld_text SEPARATED BY SPACE.

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