ABAP Select data from SAP table RE31B into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP RE31B 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 RE31B. 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 RE31B 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_RE31B TYPE STANDARD TABLE OF RE31B,
      WA_RE31B TYPE RE31B,
      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: <RE31B> TYPE RE31B.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RE31B.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RE31B
  INTO TABLE IT_RE31B.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RE31B
*  INTO TABLE @DATA(IT_RE31B2).
*--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_RE31B INDEX 1 INTO DATA(WA_RE31B2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RE31B ASSIGNING <RE31B>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RE31B>-MANDT = 1.
<RE31B>-BLART = 1.
<RE31B>-FKEYS = 1.
<RE31B>-FIKEY = 1.
<RE31B>-BLDAT = 1.

ENDLOOP.

LOOP AT IT_RE31B INTO WA_RE31B.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RE31B-BUDAT, sy-vline,
  WA_RE31B-WAERS, sy-vline,
  WA_RE31B-KURSF, sy-vline,
  WA_RE31B-BUKRS, sy-vline,
  WA_RE31B-GSBER, sy-vline,
  WA_RE31B-VALUT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RE31B 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_RE31B 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_RE31B INTO WA_RE31B.


*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 EXCRT, internal->external for field KURSF
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_RE31B-KURSF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RE31B-KURSF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BVRKO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RE31B-BVRKO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RE31B-BVRKO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RE31B-HKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RE31B-HKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RE31B-OPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RE31B-OPBEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RE31B-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RE31B-GPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VTREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RE31B-VTREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RE31B-VTREF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RE31B-VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RE31B-VKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field XBLNS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RE31B-XBLNS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RE31B-XBLNS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field XBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RE31B-XBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RE31B-XBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NRZAS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RE31B-NRZAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RE31B-NRZAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECPT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RE31B-RECPT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RE31B-RECPT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HKONA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RE31B-HKONA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RE31B-HKONA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HKONE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RE31B-HKONE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RE31B-HKONE.
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_RE31B_STR, 
MANDT TYPE STRING,
BLART TYPE STRING,
FKEYS TYPE STRING,
FIKEY TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
WAERS TYPE STRING,
KURSF TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
VALUT TYPE STRING,
BVRKO TYPE STRING,
HKONT TYPE STRING,
AUGRD TYPE STRING,
OPBEL TYPE STRING,
GPART TYPE STRING,
VTREF TYPE STRING,
VKONT TYPE STRING,
BANKL TYPE STRING,
BANKN TYPE STRING,
XBLNS TYPE STRING,
XBLNR TYPE STRING,
TXTVW TYPE STRING,
KOINH TYPE STRING,
BKONT TYPE STRING,
BANKS TYPE STRING,
XPGRO TYPE STRING,
SPART TYPE STRING,
CHQKZ TYPE STRING,
BETAK TYPE STRING,
BETAU TYPE STRING,
BETSP TYPE STRING,
BETRC TYPE STRING,
BETRW TYPE STRING,
AZEI1 TYPE STRING,
XAKON TYPE STRING,
FAEDN TYPE STRING,
XAUZA TYPE STRING,
XEIZA TYPE STRING,
NRZAS TYPE STRING,
AAUSZ TYPE STRING,
ALEST TYPE STRING,
AAKTO TYPE STRING,
KEYZ1 TYPE STRING,
POST TYPE STRING,
HERKF TYPE STRING,
RECPT TYPE STRING,
INTVL TYPE STRING,
HKONA TYPE STRING,
HKONE TYPE STRING,
SELT1 TYPE STRING,
SELT2 TYPE STRING,
SELT3 TYPE STRING,
SELW1 TYPE STRING,
SELW2 TYPE STRING,
SELW3 TYPE STRING,
TXT301 TYPE STRING,
TXT302 TYPE STRING,
TXT303 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RE31B_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_RE31B_STR-MANDT sy-vline 
WA_RE31B_STR-BLART sy-vline 
WA_RE31B_STR-FKEYS sy-vline 
WA_RE31B_STR-FIKEY sy-vline 
WA_RE31B_STR-BLDAT sy-vline 
WA_RE31B_STR-BUDAT sy-vline 
WA_RE31B_STR-WAERS sy-vline 
WA_RE31B_STR-KURSF sy-vline 
WA_RE31B_STR-BUKRS sy-vline 
WA_RE31B_STR-GSBER sy-vline 
WA_RE31B_STR-VALUT sy-vline 
WA_RE31B_STR-BVRKO sy-vline 
WA_RE31B_STR-HKONT sy-vline 
WA_RE31B_STR-AUGRD sy-vline 
WA_RE31B_STR-OPBEL sy-vline 
WA_RE31B_STR-GPART sy-vline 
WA_RE31B_STR-VTREF sy-vline 
WA_RE31B_STR-VKONT sy-vline 
WA_RE31B_STR-BANKL sy-vline 
WA_RE31B_STR-BANKN sy-vline 
WA_RE31B_STR-XBLNS sy-vline 
WA_RE31B_STR-XBLNR sy-vline 
WA_RE31B_STR-TXTVW sy-vline 
WA_RE31B_STR-KOINH sy-vline 
WA_RE31B_STR-BKONT sy-vline 
WA_RE31B_STR-BANKS sy-vline 
WA_RE31B_STR-XPGRO sy-vline 
WA_RE31B_STR-SPART sy-vline 
WA_RE31B_STR-CHQKZ sy-vline 
WA_RE31B_STR-BETAK sy-vline 
WA_RE31B_STR-BETAU sy-vline 
WA_RE31B_STR-BETSP sy-vline 
WA_RE31B_STR-BETRC sy-vline 
WA_RE31B_STR-BETRW sy-vline 
WA_RE31B_STR-AZEI1 sy-vline 
WA_RE31B_STR-XAKON sy-vline 
WA_RE31B_STR-FAEDN sy-vline 
WA_RE31B_STR-XAUZA sy-vline 
WA_RE31B_STR-XEIZA sy-vline 
WA_RE31B_STR-NRZAS sy-vline 
WA_RE31B_STR-AAUSZ sy-vline 
WA_RE31B_STR-ALEST sy-vline 
WA_RE31B_STR-AAKTO sy-vline 
WA_RE31B_STR-KEYZ1 sy-vline 
WA_RE31B_STR-POST sy-vline 
WA_RE31B_STR-HERKF sy-vline 
WA_RE31B_STR-RECPT sy-vline 
WA_RE31B_STR-INTVL sy-vline 
WA_RE31B_STR-HKONA sy-vline 
WA_RE31B_STR-HKONE sy-vline 
WA_RE31B_STR-SELT1 sy-vline 
WA_RE31B_STR-SELT2 sy-vline 
WA_RE31B_STR-SELT3 sy-vline 
WA_RE31B_STR-SELW1 sy-vline 
WA_RE31B_STR-SELW2 sy-vline 
WA_RE31B_STR-SELW3 sy-vline 
WA_RE31B_STR-TXT301 sy-vline 
WA_RE31B_STR-TXT302 sy-vline 
WA_RE31B_STR-TXT303 sy-vline      INTO ld_text SEPARATED BY SPACE.

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