ABAP Select data from SAP table REXCC_NL_CDST_ALV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXCC_NL_CDST_ALV
*  INTO TABLE @DATA(IT_REXCC_NL_CDST_ALV2).
*--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_REXCC_NL_CDST_ALV INDEX 1 INTO DATA(WA_REXCC_NL_CDST_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXCC_NL_CDST_ALV>-OBJNR = 1.
<REXCC_NL_CDST_ALV>-OBJTYPE = 1.
<REXCC_NL_CDST_ALV>-OBJID = 1.
<REXCC_NL_CDST_ALV>-PARTNER = 1.
<REXCC_NL_CDST_ALV>-ROLE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXCC_NL_CDST_ALV-VALIDFROM, sy-vline,
  WA_REXCC_NL_CDST_ALV-VALIDTO, sy-vline,
  WA_REXCC_NL_CDST_ALV-XNAME, sy-vline,
  WA_REXCC_NL_CDST_ALV-XPARTNER, sy-vline,
  WA_REXCC_NL_CDST_ALV-CONDTYPE, sy-vline,
  WA_REXCC_NL_CDST_ALV-CONDVALIDFROM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXCC_NL_CDST_ALV 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_REXCC_NL_CDST_ALV 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_REXCC_NL_CDST_ALV INTO WA_REXCC_NL_CDST_ALV.


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

*Conversion exit REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_REXCC_NL_CDST_ALV-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCC_NL_CDST_ALV-VALIDTO.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit REDAT, internal->external for field CONDVALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_REXCC_NL_CDST_ALV-CONDVALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCC_NL_CDST_ALV-CONDVALIDTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field VALUEVALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_REXCC_NL_CDST_ALV-VALUEVALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCC_NL_CDST_ALV-VALUEVALIDTO.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit REDAT, internal->external for field RECNENDABS
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_REXCC_NL_CDST_ALV-RECNENDABS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCC_NL_CDST_ALV-RECNENDABS.
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_REXCC_NL_CDST_ALV_STR, 
OBJNR TYPE STRING,
OBJTYPE TYPE STRING,
OBJID TYPE STRING,
PARTNER TYPE STRING,
ROLE TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
XNAME TYPE STRING,
XPARTNER TYPE STRING,
CONDTYPE TYPE STRING,
CONDVALIDFROM TYPE STRING,
CONDVALIDTO TYPE STRING,
VALUEVALIDFROM TYPE STRING,
VALUEVALIDTO TYPE STRING,
CALCVALUE TYPE STRING,
CALCNUMBER TYPE STRING,
CONDVALUE TYPE STRING,
CONDCURR TYPE STRING,
BUKRS TYPE STRING,
SWENR TYPE STRING,
SMENR TYPE STRING,
RECNNR TYPE STRING,
RECNTYPE TYPE STRING,
RECNTXT TYPE STRING,
RECNDAT TYPE STRING,
RECN2DAT TYPE STRING,
RECNBEG TYPE STRING,
RECNDPO TYPE STRING,
RECNEND1ST TYPE STRING,
RECNENDABS TYPE STRING,
RECNDACTIV TYPE STRING,
STREET TYPE STRING,
HOUSE_NUM1 TYPE STRING,
CITY1 TYPE STRING,
POST_CODE1 TYPE STRING,
COUNTRY TYPE STRING,
REGION TYPE STRING,
ADRZUS TYPE STRING,
STR_SUPPL1 TYPE STRING,
STR_SUPPL2 TYPE STRING,
STR_SUPPL3 TYPE STRING,
LOCATION TYPE STRING,
HOUSE_NUM2 TYPE STRING,
CITY2 TYPE STRING,
BUILDING TYPE STRING,
EXT_ID_NUMBER TYPE STRING,
INTRENO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXCC_NL_CDST_ALV_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_REXCC_NL_CDST_ALV_STR-OBJNR sy-vline 
WA_REXCC_NL_CDST_ALV_STR-OBJTYPE sy-vline 
WA_REXCC_NL_CDST_ALV_STR-OBJID sy-vline 
WA_REXCC_NL_CDST_ALV_STR-PARTNER sy-vline 
WA_REXCC_NL_CDST_ALV_STR-ROLE sy-vline 
WA_REXCC_NL_CDST_ALV_STR-VALIDFROM sy-vline 
WA_REXCC_NL_CDST_ALV_STR-VALIDTO sy-vline 
WA_REXCC_NL_CDST_ALV_STR-XNAME sy-vline 
WA_REXCC_NL_CDST_ALV_STR-XPARTNER sy-vline 
WA_REXCC_NL_CDST_ALV_STR-CONDTYPE sy-vline 
WA_REXCC_NL_CDST_ALV_STR-CONDVALIDFROM sy-vline 
WA_REXCC_NL_CDST_ALV_STR-CONDVALIDTO sy-vline 
WA_REXCC_NL_CDST_ALV_STR-VALUEVALIDFROM sy-vline 
WA_REXCC_NL_CDST_ALV_STR-VALUEVALIDTO sy-vline 
WA_REXCC_NL_CDST_ALV_STR-CALCVALUE sy-vline 
WA_REXCC_NL_CDST_ALV_STR-CALCNUMBER sy-vline 
WA_REXCC_NL_CDST_ALV_STR-CONDVALUE sy-vline 
WA_REXCC_NL_CDST_ALV_STR-CONDCURR sy-vline 
WA_REXCC_NL_CDST_ALV_STR-BUKRS sy-vline 
WA_REXCC_NL_CDST_ALV_STR-SWENR sy-vline 
WA_REXCC_NL_CDST_ALV_STR-SMENR sy-vline 
WA_REXCC_NL_CDST_ALV_STR-RECNNR sy-vline 
WA_REXCC_NL_CDST_ALV_STR-RECNTYPE sy-vline 
WA_REXCC_NL_CDST_ALV_STR-RECNTXT sy-vline 
WA_REXCC_NL_CDST_ALV_STR-RECNDAT sy-vline 
WA_REXCC_NL_CDST_ALV_STR-RECN2DAT sy-vline 
WA_REXCC_NL_CDST_ALV_STR-RECNBEG sy-vline 
WA_REXCC_NL_CDST_ALV_STR-RECNDPO sy-vline 
WA_REXCC_NL_CDST_ALV_STR-RECNEND1ST sy-vline 
WA_REXCC_NL_CDST_ALV_STR-RECNENDABS sy-vline 
WA_REXCC_NL_CDST_ALV_STR-RECNDACTIV sy-vline 
WA_REXCC_NL_CDST_ALV_STR-STREET sy-vline 
WA_REXCC_NL_CDST_ALV_STR-HOUSE_NUM1 sy-vline 
WA_REXCC_NL_CDST_ALV_STR-CITY1 sy-vline 
WA_REXCC_NL_CDST_ALV_STR-POST_CODE1 sy-vline 
WA_REXCC_NL_CDST_ALV_STR-COUNTRY sy-vline 
WA_REXCC_NL_CDST_ALV_STR-REGION sy-vline 
WA_REXCC_NL_CDST_ALV_STR-ADRZUS sy-vline 
WA_REXCC_NL_CDST_ALV_STR-STR_SUPPL1 sy-vline 
WA_REXCC_NL_CDST_ALV_STR-STR_SUPPL2 sy-vline 
WA_REXCC_NL_CDST_ALV_STR-STR_SUPPL3 sy-vline 
WA_REXCC_NL_CDST_ALV_STR-LOCATION sy-vline 
WA_REXCC_NL_CDST_ALV_STR-HOUSE_NUM2 sy-vline 
WA_REXCC_NL_CDST_ALV_STR-CITY2 sy-vline 
WA_REXCC_NL_CDST_ALV_STR-BUILDING sy-vline 
WA_REXCC_NL_CDST_ALV_STR-EXT_ID_NUMBER sy-vline 
WA_REXCC_NL_CDST_ALV_STR-INTRENO sy-vline      INTO ld_text SEPARATED BY SPACE.

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