ABAP Select data from SAP table ACCREV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ACCREV
*  INTO TABLE @DATA(IT_ACCREV2).
*--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_ACCREV INDEX 1 INTO DATA(WA_ACCREV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ACCREV>-AWTYP = 1.
<ACCREV>-AWREF = 1.
<ACCREV>-AWORG = 1.
<ACCREV>-AWSYS = 1.
<ACCREV>-AWTYP_REV = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ACCREV-AWREF_REV, sy-vline,
  WA_ACCREV-AWORG_REV, sy-vline,
  WA_ACCREV-SUBTA_REV, sy-vline,
  WA_ACCREV-BUDAT_REV, sy-vline,
  WA_ACCREV-GLVOR_REV, sy-vline,
  WA_ACCREV-BLDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ACCREV 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_ACCREV 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_ACCREV INTO WA_ACCREV.


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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field OPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ACCREV-OPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACCREV-OPBEL.
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_ACCREV_STR, 
AWTYP TYPE STRING,
AWREF TYPE STRING,
AWORG TYPE STRING,
AWSYS TYPE STRING,
AWTYP_REV TYPE STRING,
AWREF_REV TYPE STRING,
AWORG_REV TYPE STRING,
SUBTA_REV TYPE STRING,
BUDAT_REV TYPE STRING,
GLVOR_REV TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
MONAT TYPE STRING,
GJAHR TYPE STRING,
BELNR TYPE STRING,
STGRD TYPE STRING,
XNEGP TYPE STRING,
FKART TYPE STRING,
BUKRS TYPE STRING,
GLVOR TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
TIMESTAMP TYPE STRING,
USNAM TYPE STRING,
SUBSET TYPE STRING,
STBLA TYPE STRING,
ACC_PRINCIPLE TYPE STRING,
RLDNR TYPE STRING,
LDGRP TYPE STRING,
TCODE TYPE STRING,
XBLNR TYPE STRING,
BELNR_I TYPE STRING,
VATDATE TYPE STRING,
BVORG TYPE STRING,
BLART_FKK TYPE STRING,
FIKEY TYPE STRING,
OPBEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ACCREV_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_ACCREV_STR-AWTYP sy-vline 
WA_ACCREV_STR-AWREF sy-vline 
WA_ACCREV_STR-AWORG sy-vline 
WA_ACCREV_STR-AWSYS sy-vline 
WA_ACCREV_STR-AWTYP_REV sy-vline 
WA_ACCREV_STR-AWREF_REV sy-vline 
WA_ACCREV_STR-AWORG_REV sy-vline 
WA_ACCREV_STR-SUBTA_REV sy-vline 
WA_ACCREV_STR-BUDAT_REV sy-vline 
WA_ACCREV_STR-GLVOR_REV sy-vline 
WA_ACCREV_STR-BLDAT sy-vline 
WA_ACCREV_STR-BUDAT sy-vline 
WA_ACCREV_STR-MONAT sy-vline 
WA_ACCREV_STR-GJAHR sy-vline 
WA_ACCREV_STR-BELNR sy-vline 
WA_ACCREV_STR-STGRD sy-vline 
WA_ACCREV_STR-XNEGP sy-vline 
WA_ACCREV_STR-FKART sy-vline 
WA_ACCREV_STR-BUKRS sy-vline 
WA_ACCREV_STR-GLVOR sy-vline 
WA_ACCREV_STR-CPUDT sy-vline 
WA_ACCREV_STR-CPUTM sy-vline 
WA_ACCREV_STR-TIMESTAMP sy-vline 
WA_ACCREV_STR-USNAM sy-vline 
WA_ACCREV_STR-SUBSET sy-vline 
WA_ACCREV_STR-STBLA sy-vline 
WA_ACCREV_STR-ACC_PRINCIPLE sy-vline 
WA_ACCREV_STR-RLDNR sy-vline 
WA_ACCREV_STR-LDGRP sy-vline 
WA_ACCREV_STR-TCODE sy-vline 
WA_ACCREV_STR-XBLNR sy-vline 
WA_ACCREV_STR-BELNR_I sy-vline 
WA_ACCREV_STR-VATDATE sy-vline 
WA_ACCREV_STR-BVORG sy-vline 
WA_ACCREV_STR-BLART_FKK sy-vline 
WA_ACCREV_STR-FIKEY sy-vline 
WA_ACCREV_STR-OPBEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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