ABAP Select data from SAP table REVAR_1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REVAR_1 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 REVAR_1. 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 REVAR_1 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_REVAR_1 TYPE STANDARD TABLE OF REVAR_1,
      WA_REVAR_1 TYPE REVAR_1,
      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: <REVAR_1> TYPE REVAR_1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REVAR_1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REVAR_1
  INTO TABLE IT_REVAR_1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REVAR_1
*  INTO TABLE @DATA(IT_REVAR_12).
*--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_REVAR_1 INDEX 1 INTO DATA(WA_REVAR_12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REVAR_1 ASSIGNING <REVAR_1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REVAR_1>-POSNR = 1.
<REVAR_1>-POSID = 1.
<REVAR_1>-OBJNR = 1.
<REVAR_1>-TXT50 = 1.
<REVAR_1>-IVART = 1.

ENDLOOP.

LOOP AT IT_REVAR_1 INTO WA_REVAR_1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REVAR_1-IVTXT, sy-vline,
  WA_REVAR_1-ALTERN, sy-vline,
  WA_REVAR_1-P_ROL1, sy-vline,
  WA_REVAR_1-P_ROL1_TEXT, sy-vline,
  WA_REVAR_1-PARNR_1, sy-vline,
  WA_REVAR_1-PARNR_1_TEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REVAR_1 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_REVAR_1 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_REVAR_1 INTO WA_REVAR_1.


*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 REQNR, internal->external for field POSNR
CALL FUNCTION 'CONVERSION_EXIT_REQNR_OUTPUT'
  EXPORTING
    input =                      WA_REVAR_1-POSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVAR_1-POSNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REQID, internal->external for field POSID
CALL FUNCTION 'CONVERSION_EXIT_REQID_OUTPUT'
  EXPORTING
    input =                      WA_REVAR_1-POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVAR_1-POSID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field IVART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REVAR_1-IVART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVAR_1-IVART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REQID, internal->external for field ALTERN
CALL FUNCTION 'CONVERSION_EXIT_REQID_OUTPUT'
  EXPORTING
    input =                      WA_REVAR_1-ALTERN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVAR_1-ALTERN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PARVW, internal->external for field P_ROL1
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_REVAR_1-P_ROL1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVAR_1-P_ROL1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARNR_1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REVAR_1-PARNR_1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVAR_1-PARNR_1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PARVW, internal->external for field P_ROL2
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_REVAR_1-P_ROL2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVAR_1-P_ROL2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARNR_2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REVAR_1-PARNR_2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVAR_1-PARNR_2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SIZECL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REVAR_1-SIZECL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVAR_1-SIZECL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_REVAR_1-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVAR_1-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBUND
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REVAR_1-VBUND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVAR_1-VBUND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field USE04
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REVAR_1-USE04
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVAR_1-USE04.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field USE05
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REVAR_1-USE05
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVAR_1-USE05.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ARCOMP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REVAR_1-ARCOMP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVAR_1-ARCOMP.
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_REVAR_1_STR, 
POSNR TYPE STRING,
POSID TYPE STRING,
OBJNR TYPE STRING,
TXT50 TYPE STRING,
IVART TYPE STRING,
IVTXT TYPE STRING,
ALTERN TYPE STRING,
P_ROL1 TYPE STRING,
P_ROL1_TEXT TYPE STRING,
PARNR_1 TYPE STRING,
PARNR_1_TEXT TYPE STRING,
P_ROL2 TYPE STRING,
P_ROL2_TEXT TYPE STRING,
PARNR_2 TYPE STRING,
PARNR_2_TEXT TYPE STRING,
SIZECL TYPE STRING,
PRIORI TYPE STRING,
WDATU TYPE STRING,
GJAHR TYPE STRING,
GDATU TYPE STRING,
LAND1 TYPE STRING,
XEXTRN TYPE STRING,
VBUND TYPE STRING,
USR00 TYPE STRING,
USR01 TYPE STRING,
USR02 TYPE STRING,
USR03 TYPE STRING,
USR04 TYPE STRING,
USE04 TYPE STRING,
USR05 TYPE STRING,
USE05 TYPE STRING,
USR06 TYPE STRING,
USE06 TYPE STRING,
USR07 TYPE STRING,
USE07 TYPE STRING,
USR08 TYPE STRING,
USR09 TYPE STRING,
USR10 TYPE STRING,
USR11 TYPE STRING,
USR12 TYPE STRING,
USR13 TYPE STRING,
ABUKRS TYPE STRING,
ARCOMP TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
AENAM TYPE STRING,
UPDAT TYPE STRING,
EXPAND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REVAR_1_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_REVAR_1_STR-POSNR sy-vline 
WA_REVAR_1_STR-POSID sy-vline 
WA_REVAR_1_STR-OBJNR sy-vline 
WA_REVAR_1_STR-TXT50 sy-vline 
WA_REVAR_1_STR-IVART sy-vline 
WA_REVAR_1_STR-IVTXT sy-vline 
WA_REVAR_1_STR-ALTERN sy-vline 
WA_REVAR_1_STR-P_ROL1 sy-vline 
WA_REVAR_1_STR-P_ROL1_TEXT sy-vline 
WA_REVAR_1_STR-PARNR_1 sy-vline 
WA_REVAR_1_STR-PARNR_1_TEXT sy-vline 
WA_REVAR_1_STR-P_ROL2 sy-vline 
WA_REVAR_1_STR-P_ROL2_TEXT sy-vline 
WA_REVAR_1_STR-PARNR_2 sy-vline 
WA_REVAR_1_STR-PARNR_2_TEXT sy-vline 
WA_REVAR_1_STR-SIZECL sy-vline 
WA_REVAR_1_STR-PRIORI sy-vline 
WA_REVAR_1_STR-WDATU sy-vline 
WA_REVAR_1_STR-GJAHR sy-vline 
WA_REVAR_1_STR-GDATU sy-vline 
WA_REVAR_1_STR-LAND1 sy-vline 
WA_REVAR_1_STR-XEXTRN sy-vline 
WA_REVAR_1_STR-VBUND sy-vline 
WA_REVAR_1_STR-USR00 sy-vline 
WA_REVAR_1_STR-USR01 sy-vline 
WA_REVAR_1_STR-USR02 sy-vline 
WA_REVAR_1_STR-USR03 sy-vline 
WA_REVAR_1_STR-USR04 sy-vline 
WA_REVAR_1_STR-USE04 sy-vline 
WA_REVAR_1_STR-USR05 sy-vline 
WA_REVAR_1_STR-USE05 sy-vline 
WA_REVAR_1_STR-USR06 sy-vline 
WA_REVAR_1_STR-USE06 sy-vline 
WA_REVAR_1_STR-USR07 sy-vline 
WA_REVAR_1_STR-USE07 sy-vline 
WA_REVAR_1_STR-USR08 sy-vline 
WA_REVAR_1_STR-USR09 sy-vline 
WA_REVAR_1_STR-USR10 sy-vline 
WA_REVAR_1_STR-USR11 sy-vline 
WA_REVAR_1_STR-USR12 sy-vline 
WA_REVAR_1_STR-USR13 sy-vline 
WA_REVAR_1_STR-ABUKRS sy-vline 
WA_REVAR_1_STR-ARCOMP sy-vline 
WA_REVAR_1_STR-ERNAM sy-vline 
WA_REVAR_1_STR-ERDAT sy-vline 
WA_REVAR_1_STR-AENAM sy-vline 
WA_REVAR_1_STR-UPDAT sy-vline 
WA_REVAR_1_STR-EXPAND sy-vline      INTO ld_text SEPARATED BY SPACE.

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