ABAP Select data from SAP table REXA_ACCT_ASS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXA_ACCT_ASS
*  INTO TABLE @DATA(IT_REXA_ACCT_ASS2).
*--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_REXA_ACCT_ASS INDEX 1 INTO DATA(WA_REXA_ACCT_ASS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXA_ACCT_ASS>-COMP_CODE = 1.
<REXA_ACCT_ASS>-BUSINESS_ENTITY = 1.
<REXA_ACCT_ASS>-BUILDING = 1.
<REXA_ACCT_ASS>-PROPERTY = 1.
<REXA_ACCT_ASS>-RENTAL_OBJECT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXA_ACCT_ASS-SERV_CHARGE_KEY, sy-vline,
  WA_REXA_ACCT_ASS-SETTLEMENT_UNIT, sy-vline,
  WA_REXA_ACCT_ASS-CONTRACT_NO, sy-vline,
  WA_REXA_ACCT_ASS-REF_DATE, sy-vline,
  WA_REXA_ACCT_ASS-IMKEY, sy-vline,
  WA_REXA_ACCT_ASS-DABRZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXA_ACCT_ASS 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_REXA_ACCT_ASS 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_REXA_ACCT_ASS INTO WA_REXA_ACCT_ASS.


*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 SWENR, internal->external for field BUSINESS_ENTITY
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_REXA_ACCT_ASS-BUSINESS_ENTITY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXA_ACCT_ASS-BUSINESS_ENTITY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SGENR, internal->external for field BUILDING
CALL FUNCTION 'CONVERSION_EXIT_SGENR_OUTPUT'
  EXPORTING
    input =                      WA_REXA_ACCT_ASS-BUILDING
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXA_ACCT_ASS-BUILDING.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SGRNR, internal->external for field PROPERTY
CALL FUNCTION 'CONVERSION_EXIT_SGRNR_OUTPUT'
  EXPORTING
    input =                      WA_REXA_ACCT_ASS-PROPERTY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXA_ACCT_ASS-PROPERTY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SMENR, internal->external for field RENTAL_OBJECT
CALL FUNCTION 'CONVERSION_EXIT_SMENR_OUTPUT'
  EXPORTING
    input =                      WA_REXA_ACCT_ASS-RENTAL_OBJECT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXA_ACCT_ASS-RENTAL_OBJECT.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit IMKEY, internal->external for field IMKEY
CALL FUNCTION 'CONVERSION_EXIT_IMKEY_OUTPUT'
  EXPORTING
    input =                      WA_REXA_ACCT_ASS-IMKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXA_ACCT_ASS-IMKEY.
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_REXA_ACCT_ASS_STR, 
COMP_CODE TYPE STRING,
BUSINESS_ENTITY TYPE STRING,
BUILDING TYPE STRING,
PROPERTY TYPE STRING,
RENTAL_OBJECT TYPE STRING,
SERV_CHARGE_KEY TYPE STRING,
SETTLEMENT_UNIT TYPE STRING,
CONTRACT_NO TYPE STRING,
REF_DATE TYPE STRING,
IMKEY TYPE STRING,
DABRZ TYPE STRING,
INTRENO TYPE STRING,
OBJNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXA_ACCT_ASS_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_REXA_ACCT_ASS_STR-COMP_CODE sy-vline 
WA_REXA_ACCT_ASS_STR-BUSINESS_ENTITY sy-vline 
WA_REXA_ACCT_ASS_STR-BUILDING sy-vline 
WA_REXA_ACCT_ASS_STR-PROPERTY sy-vline 
WA_REXA_ACCT_ASS_STR-RENTAL_OBJECT sy-vline 
WA_REXA_ACCT_ASS_STR-SERV_CHARGE_KEY sy-vline 
WA_REXA_ACCT_ASS_STR-SETTLEMENT_UNIT sy-vline 
WA_REXA_ACCT_ASS_STR-CONTRACT_NO sy-vline 
WA_REXA_ACCT_ASS_STR-REF_DATE sy-vline 
WA_REXA_ACCT_ASS_STR-IMKEY sy-vline 
WA_REXA_ACCT_ASS_STR-DABRZ sy-vline 
WA_REXA_ACCT_ASS_STR-INTRENO sy-vline 
WA_REXA_ACCT_ASS_STR-OBJNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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