ABAP Select data from SAP table REEX_GUI_DOC_ITEM_L into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REEX_GUI_DOC_ITEM_L
*  INTO TABLE @DATA(IT_REEX_GUI_DOC_ITEM_L2).
*--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_REEX_GUI_DOC_ITEM_L INDEX 1 INTO DATA(WA_REEX_GUI_DOC_ITEM_L2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REEX_GUI_DOC_ITEM_L>-DOCGUID = 1.
<REEX_GUI_DOC_ITEM_L>-ITEMNO_ACC = 1.
<REEX_GUI_DOC_ITEM_L>-SP_GL_IND = 1.
<REEX_GUI_DOC_ITEM_L>-AMT_DOCCUR = 1.
<REEX_GUI_DOC_ITEM_L>-CURRENCY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REEX_GUI_DOC_ITEM_L-CTLCAMOUNT, sy-vline,
  WA_REEX_GUI_DOC_ITEM_L-CTLCCURRKEY, sy-vline,
  WA_REEX_GUI_DOC_ITEM_L-ZFBDT, sy-vline,
  WA_REEX_GUI_DOC_ITEM_L-GSBER, sy-vline,
  WA_REEX_GUI_DOC_ITEM_L-TAX_CODE, sy-vline,
  WA_REEX_GUI_DOC_ITEM_L-TXJCD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REEX_GUI_DOC_ITEM_L 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_REEX_GUI_DOC_ITEM_L 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_REEX_GUI_DOC_ITEM_L INTO WA_REEX_GUI_DOC_ITEM_L.


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

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

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

*Conversion exit FMCIS, internal->external for field FIPOS
CALL FUNCTION 'CONVERSION_EXIT_FMCIS_OUTPUT'
  EXPORTING
    input =                      WA_REEX_GUI_DOC_ITEM_L-FIPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEX_GUI_DOC_ITEM_L-FIPOS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ABPSN, internal->external for field WBS_ELEMENT
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_REEX_GUI_DOC_ITEM_L-WBS_ELEMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEX_GUI_DOC_ITEM_L-WBS_ELEMENT.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field PPRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REEX_GUI_DOC_ITEM_L-PPRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEX_GUI_DOC_ITEM_L-PPRCTR.
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_REEX_GUI_DOC_ITEM_L_STR, 
DOCGUID TYPE STRING,
ITEMNO_ACC TYPE STRING,
SP_GL_IND TYPE STRING,
AMT_DOCCUR TYPE STRING,
CURRENCY TYPE STRING,
CTLCAMOUNT TYPE STRING,
CTLCCURRKEY TYPE STRING,
ZFBDT TYPE STRING,
GSBER TYPE STRING,
TAX_CODE TYPE STRING,
TXJCD TYPE STRING,
XITEM TYPE STRING,
GL_ACCOUNT TYPE STRING,
ACCTYPE TYPE STRING,
ACCOUNTID TYPE STRING,
XACCOUNTIDENT TYPE STRING,
FLOW_TYPE TYPE STRING,
REF_DATE TYPE STRING,
OBJNR TYPE STRING,
XOBJIDENT TYPE STRING,
CLEAREDIND TYPE STRING,
ZUONR TYPE STRING,
ZSCHL TYPE STRING,
ZLSPR TYPE STRING,
ZTERM TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
BVTYP TYPE STRING,
MSCHL TYPE STRING,
MANSP TYPE STRING,
MADAT TYPE STRING,
MANST TYPE STRING,
MABER TYPE STRING,
PRCTR TYPE STRING,
FIPOS TYPE STRING,
FISTL TYPE STRING,
GEBER TYPE STRING,
GRANT_NBR TYPE STRING,
FKBER_LONG TYPE STRING,
REFGUID TYPE STRING,
BUPLA TYPE STRING,
SECCO TYPE STRING,
BUDGET_PD TYPE STRING,
DATEOFSERVICE TYPE STRING,
WBS_ELEMENT TYPE STRING,
COSTCENTER TYPE STRING,
ORDERID TYPE STRING,
PPRCTR TYPE STRING,
SEPAMNDID TYPE STRING,
SEPARECCRDID TYPE STRING,
MAPREFGUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REEX_GUI_DOC_ITEM_L_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_REEX_GUI_DOC_ITEM_L_STR-DOCGUID sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-ITEMNO_ACC sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-SP_GL_IND sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-AMT_DOCCUR sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-CURRENCY sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-CTLCAMOUNT sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-CTLCCURRKEY sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-ZFBDT sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-GSBER sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-TAX_CODE sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-TXJCD sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-XITEM sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-GL_ACCOUNT sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-ACCTYPE sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-ACCOUNTID sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-XACCOUNTIDENT sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-FLOW_TYPE sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-REF_DATE sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-OBJNR sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-XOBJIDENT sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-CLEAREDIND sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-ZUONR sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-ZSCHL sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-ZLSPR sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-ZTERM sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-HBKID sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-HKTID sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-BVTYP sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-MSCHL sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-MANSP sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-MADAT sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-MANST sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-MABER sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-PRCTR sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-FIPOS sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-FISTL sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-GEBER sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-GRANT_NBR sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-FKBER_LONG sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-REFGUID sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-BUPLA sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-SECCO sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-BUDGET_PD sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-DATEOFSERVICE sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-WBS_ELEMENT sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-COSTCENTER sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-ORDERID sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-PPRCTR sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-SEPAMNDID sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-SEPARECCRDID sy-vline 
WA_REEX_GUI_DOC_ITEM_L_STR-MAPREFGUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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