ABAP Select data from SAP table REXCJPF1791 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REXCJPF1791 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 REXCJPF1791. 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 REXCJPF1791 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_REXCJPF1791 TYPE STANDARD TABLE OF REXCJPF1791,
      WA_REXCJPF1791 TYPE REXCJPF1791,
      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: <REXCJPF1791> TYPE REXCJPF1791.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REXCJPF1791.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REXCJPF1791
  INTO TABLE IT_REXCJPF1791.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXCJPF1791
*  INTO TABLE @DATA(IT_REXCJPF17912).
*--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_REXCJPF1791 INDEX 1 INTO DATA(WA_REXCJPF17912).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REXCJPF1791 ASSIGNING <REXCJPF1791>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXCJPF1791>-ICON_DETAIL = 1.
<REXCJPF1791>-INTRENO = 1.
<REXCJPF1791>-BUKRS = 1.
<REXCJPF1791>-SWENR = 1.
<REXCJPF1791>-SGENR = 1.

ENDLOOP.

LOOP AT IT_REXCJPF1791 INTO WA_REXCJPF1791.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXCJPF1791-N01_REPDATE_ERA, sy-vline,
  WA_REXCJPF1791-N01_REPDATE_YEAR, sy-vline,
  WA_REXCJPF1791-N01_REPDATE_MONTH, sy-vline,
  WA_REXCJPF1791-N01_REPDATE_DAY, sy-vline,
  WA_REXCJPF1791-N02_TAXOFFNAME, sy-vline,
  WA_REXCJPF1791-N03_REPORTERADDR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXCJPF1791 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_REXCJPF1791 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_REXCJPF1791 INTO WA_REXCJPF1791.


*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 SWENR
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_REXCJPF1791-SWENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCJPF1791-SWENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SGENR, internal->external for field SGENR
CALL FUNCTION 'CONVERSION_EXIT_SGENR_OUTPUT'
  EXPORTING
    input =                      WA_REXCJPF1791-SGENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCJPF1791-SGENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEASUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REXCJPF1791-MEASUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCJPF1791-MEASUNIT.
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_REXCJPF1791_STR, 
ICON_DETAIL TYPE STRING,
INTRENO TYPE STRING,
BUKRS TYPE STRING,
SWENR TYPE STRING,
SGENR TYPE STRING,
N01_REPDATE_ERA TYPE STRING,
N01_REPDATE_YEAR TYPE STRING,
N01_REPDATE_MONTH TYPE STRING,
N01_REPDATE_DAY TYPE STRING,
N02_TAXOFFNAME TYPE STRING,
N03_REPORTERADDR TYPE STRING,
N04_REPALTNAME TYPE STRING,
N05_REPNAME TYPE STRING,
N06_REPPRENAM TYPE STRING,
N07_REPCNNAME TYPE STRING,
N08_REPTEL TYPE STRING,
N09_REPTELEXT TYPE STRING,
N10_BDLOCADDR TYPE STRING,
N11_BDNAME TYPE STRING,
N12_BDFLAREA TYPE STRING,
N13_BDFLAEXP TYPE STRING,
N14_BDFLBUS TYPE STRING,
N15_BDFLRES TYPE STRING,
N16_BDFLTOTAL TYPE STRING,
N17_BDFLTAXFR TYPE STRING,
N18_BDFLNOTAXF TYPE STRING,
N19_BDFLBUS2 TYPE STRING,
N20_BDCONST TYPE STRING,
N21_BDCONDT_ERA TYPE STRING,
N21_BDCONDT_YEAR TYPE STRING,
N21_BDCONDT_MONTH TYPE STRING,
N21_BDCONDT_DAY TYPE STRING,
N22_BDOWNSH TYPE STRING,
N23_BDOTHOW TYPE STRING,
N24_BDFIREPREV TYPE STRING,
N25_REPEXFLAR TYPE STRING,
N26_REPCOFLAR TYPE STRING,
N27_REPTOTFLAR TYPE STRING,
N28_REPKOCH TYPE STRING,
N29_REPKOCHDAT_ERA TYPE STRING,
N29_REPKOCHDAT_YEAR TYPE STRING,
N31_SLALTNAME TYPE STRING,
N32_SLNAME TYPE STRING,
MEASUNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXCJPF1791_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_REXCJPF1791_STR-ICON_DETAIL sy-vline 
WA_REXCJPF1791_STR-INTRENO sy-vline 
WA_REXCJPF1791_STR-BUKRS sy-vline 
WA_REXCJPF1791_STR-SWENR sy-vline 
WA_REXCJPF1791_STR-SGENR sy-vline 
WA_REXCJPF1791_STR-N01_REPDATE_ERA sy-vline 
WA_REXCJPF1791_STR-N01_REPDATE_YEAR sy-vline 
WA_REXCJPF1791_STR-N01_REPDATE_MONTH sy-vline 
WA_REXCJPF1791_STR-N01_REPDATE_DAY sy-vline 
WA_REXCJPF1791_STR-N02_TAXOFFNAME sy-vline 
WA_REXCJPF1791_STR-N03_REPORTERADDR sy-vline 
WA_REXCJPF1791_STR-N04_REPALTNAME sy-vline 
WA_REXCJPF1791_STR-N05_REPNAME sy-vline 
WA_REXCJPF1791_STR-N06_REPPRENAM sy-vline 
WA_REXCJPF1791_STR-N07_REPCNNAME sy-vline 
WA_REXCJPF1791_STR-N08_REPTEL sy-vline 
WA_REXCJPF1791_STR-N09_REPTELEXT sy-vline 
WA_REXCJPF1791_STR-N10_BDLOCADDR sy-vline 
WA_REXCJPF1791_STR-N11_BDNAME sy-vline 
WA_REXCJPF1791_STR-N12_BDFLAREA sy-vline 
WA_REXCJPF1791_STR-N13_BDFLAEXP sy-vline 
WA_REXCJPF1791_STR-N14_BDFLBUS sy-vline 
WA_REXCJPF1791_STR-N15_BDFLRES sy-vline 
WA_REXCJPF1791_STR-N16_BDFLTOTAL sy-vline 
WA_REXCJPF1791_STR-N17_BDFLTAXFR sy-vline 
WA_REXCJPF1791_STR-N18_BDFLNOTAXF sy-vline 
WA_REXCJPF1791_STR-N19_BDFLBUS2 sy-vline 
WA_REXCJPF1791_STR-N20_BDCONST sy-vline 
WA_REXCJPF1791_STR-N21_BDCONDT_ERA sy-vline 
WA_REXCJPF1791_STR-N21_BDCONDT_YEAR sy-vline 
WA_REXCJPF1791_STR-N21_BDCONDT_MONTH sy-vline 
WA_REXCJPF1791_STR-N21_BDCONDT_DAY sy-vline 
WA_REXCJPF1791_STR-N22_BDOWNSH sy-vline 
WA_REXCJPF1791_STR-N23_BDOTHOW sy-vline 
WA_REXCJPF1791_STR-N24_BDFIREPREV sy-vline 
WA_REXCJPF1791_STR-N25_REPEXFLAR sy-vline 
WA_REXCJPF1791_STR-N26_REPCOFLAR sy-vline 
WA_REXCJPF1791_STR-N27_REPTOTFLAR sy-vline 
WA_REXCJPF1791_STR-N28_REPKOCH sy-vline 
WA_REXCJPF1791_STR-N29_REPKOCHDAT_ERA sy-vline 
WA_REXCJPF1791_STR-N29_REPKOCHDAT_YEAR sy-vline 
WA_REXCJPF1791_STR-N31_SLALTNAME sy-vline 
WA_REXCJPF1791_STR-N32_SLNAME sy-vline 
WA_REXCJPF1791_STR-MEASUNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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