ABAP Select data from SAP table REEX_GUI_DOC_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_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_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_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_L TYPE STANDARD TABLE OF REEX_GUI_DOC_L,
      WA_REEX_GUI_DOC_L TYPE REEX_GUI_DOC_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_L> TYPE REEX_GUI_DOC_L.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REEX_GUI_DOC_L
*  INTO TABLE @DATA(IT_REEX_GUI_DOC_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_L INDEX 1 INTO DATA(WA_REEX_GUI_DOC_L2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REEX_GUI_DOC_L>-MANDT = 1.
<REEX_GUI_DOC_L>-DOCGUID = 1.
<REEX_GUI_DOC_L>-PSTNGPROCEDURE = 1.
<REEX_GUI_DOC_L>-PROCESS = 1.
<REEX_GUI_DOC_L>-PROCESSGUID = 1.

ENDLOOP.

LOOP AT IT_REEX_GUI_DOC_L INTO WA_REEX_GUI_DOC_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_L-PROCESSID, sy-vline,
  WA_REEX_GUI_DOC_L-FISC_YEAR, sy-vline,
  WA_REEX_GUI_DOC_L-PSTNGPERIOD, sy-vline,
  WA_REEX_GUI_DOC_L-PSTNGDATE, sy-vline,
  WA_REEX_GUI_DOC_L-DOCDATE, sy-vline,
  WA_REEX_GUI_DOC_L-ACCSYSTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REEX_GUI_DOC_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_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_L INTO WA_REEX_GUI_DOC_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 GJAHR, internal->external for field FISC_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_REEX_GUI_DOC_L-FISC_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEX_GUI_DOC_L-FISC_YEAR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field ACDOCNOREV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REEX_GUI_DOC_L-ACDOCNOREV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEX_GUI_DOC_L-ACDOCNOREV.
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_L_STR, 
MANDT TYPE STRING,
DOCGUID TYPE STRING,
PSTNGPROCEDURE TYPE STRING,
PROCESS TYPE STRING,
PROCESSGUID TYPE STRING,
PROCESSID TYPE STRING,
FISC_YEAR TYPE STRING,
PSTNGPERIOD TYPE STRING,
PSTNGDATE TYPE STRING,
DOCDATE TYPE STRING,
ACCSYSTYPE TYPE STRING,
REFDOCID TYPE STRING,
LOGSYSTEM TYPE STRING,
REVID TYPE STRING,
REVDOCGUID TYPE STRING,
STATUS TYPE STRING,
TAXID TYPE STRING,
HASGLACCSYMB TYPE STRING,
REFERENCEDOCGUID TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
RBEAR TYPE STRING,
DBEAR TYPE STRING,
TBEAR TYPE STRING,
RBHER TYPE STRING,
FDELETE TYPE STRING,
CTRULE TYPE STRING,
CTRATE TYPE STRING,
POSTCDCURR TYPE STRING,
CTDATEREQ TYPE STRING,
CTDATEACT TYPE STRING,
CTFCCURRKEY TYPE STRING,
DOCSTATUS TYPE STRING,
SECONDDOCGUID TYPE STRING,
SPLITDOCGUID TYPE STRING,
CERULE TYPE STRING,
ACCPRINCIPLE TYPE STRING,
CEDOCTYPE TYPE STRING,
BUKRS TYPE STRING,
ACDOCNO TYPE STRING,
ACDOCNOREV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REEX_GUI_DOC_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_L_STR-MANDT sy-vline 
WA_REEX_GUI_DOC_L_STR-DOCGUID sy-vline 
WA_REEX_GUI_DOC_L_STR-PSTNGPROCEDURE sy-vline 
WA_REEX_GUI_DOC_L_STR-PROCESS sy-vline 
WA_REEX_GUI_DOC_L_STR-PROCESSGUID sy-vline 
WA_REEX_GUI_DOC_L_STR-PROCESSID sy-vline 
WA_REEX_GUI_DOC_L_STR-FISC_YEAR sy-vline 
WA_REEX_GUI_DOC_L_STR-PSTNGPERIOD sy-vline 
WA_REEX_GUI_DOC_L_STR-PSTNGDATE sy-vline 
WA_REEX_GUI_DOC_L_STR-DOCDATE sy-vline 
WA_REEX_GUI_DOC_L_STR-ACCSYSTYPE sy-vline 
WA_REEX_GUI_DOC_L_STR-REFDOCID sy-vline 
WA_REEX_GUI_DOC_L_STR-LOGSYSTEM sy-vline 
WA_REEX_GUI_DOC_L_STR-REVID sy-vline 
WA_REEX_GUI_DOC_L_STR-REVDOCGUID sy-vline 
WA_REEX_GUI_DOC_L_STR-STATUS sy-vline 
WA_REEX_GUI_DOC_L_STR-TAXID sy-vline 
WA_REEX_GUI_DOC_L_STR-HASGLACCSYMB sy-vline 
WA_REEX_GUI_DOC_L_STR-REFERENCEDOCGUID sy-vline 
WA_REEX_GUI_DOC_L_STR-RERF sy-vline 
WA_REEX_GUI_DOC_L_STR-DERF sy-vline 
WA_REEX_GUI_DOC_L_STR-TERF sy-vline 
WA_REEX_GUI_DOC_L_STR-REHER sy-vline 
WA_REEX_GUI_DOC_L_STR-RBEAR sy-vline 
WA_REEX_GUI_DOC_L_STR-DBEAR sy-vline 
WA_REEX_GUI_DOC_L_STR-TBEAR sy-vline 
WA_REEX_GUI_DOC_L_STR-RBHER sy-vline 
WA_REEX_GUI_DOC_L_STR-FDELETE sy-vline 
WA_REEX_GUI_DOC_L_STR-CTRULE sy-vline 
WA_REEX_GUI_DOC_L_STR-CTRATE sy-vline 
WA_REEX_GUI_DOC_L_STR-POSTCDCURR sy-vline 
WA_REEX_GUI_DOC_L_STR-CTDATEREQ sy-vline 
WA_REEX_GUI_DOC_L_STR-CTDATEACT sy-vline 
WA_REEX_GUI_DOC_L_STR-CTFCCURRKEY sy-vline 
WA_REEX_GUI_DOC_L_STR-DOCSTATUS sy-vline 
WA_REEX_GUI_DOC_L_STR-SECONDDOCGUID sy-vline 
WA_REEX_GUI_DOC_L_STR-SPLITDOCGUID sy-vline 
WA_REEX_GUI_DOC_L_STR-CERULE sy-vline 
WA_REEX_GUI_DOC_L_STR-ACCPRINCIPLE sy-vline 
WA_REEX_GUI_DOC_L_STR-CEDOCTYPE sy-vline 
WA_REEX_GUI_DOC_L_STR-BUKRS sy-vline 
WA_REEX_GUI_DOC_L_STR-ACDOCNO sy-vline 
WA_REEX_GUI_DOC_L_STR-ACDOCNOREV sy-vline      INTO ld_text SEPARATED BY SPACE.

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