ABAP Select data from SAP table REXCESM180_L into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REXCESM180_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 REXCESM180_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 REXCESM180_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_REXCESM180_L TYPE STANDARD TABLE OF REXCESM180_L,
      WA_REXCESM180_L TYPE REXCESM180_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: <REXCESM180_L> TYPE REXCESM180_L.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REXCESM180_L.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REXCESM180_L
  INTO TABLE IT_REXCESM180_L.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXCESM180_L
*  INTO TABLE @DATA(IT_REXCESM180_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_REXCESM180_L INDEX 1 INTO DATA(WA_REXCESM180_L2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REXCESM180_L ASSIGNING <REXCESM180_L>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXCESM180_L>-MANDT = 1.
<REXCESM180_L>-BUKRS = 1.
<REXCESM180_L>-GJAHR = 1.
<REXCESM180_L>-DECNR = 1.
<REXCESM180_L>-LIFNR = 1.

ENDLOOP.

LOOP AT IT_REXCESM180_L INTO WA_REXCESM180_L.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXCESM180_L-RECID, sy-vline,
  WA_REXCESM180_L-REPID, sy-vline,
  WA_REXCESM180_L-NAMEREC, sy-vline,
  WA_REXCESM180_L-REGION, sy-vline,
  WA_REXCESM180_L-METHOD, sy-vline,
  WA_REXCESM180_L-KURSF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXCESM180_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_REXCESM180_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_REXCESM180_L INTO WA_REXCESM180_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 GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_REXCESM180_L-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCESM180_L-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DECNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXCESM180_L-DECNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCESM180_L-DECNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXCESM180_L-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCESM180_L-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KURSF
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_REXCESM180_L-KURSF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCESM180_L-KURSF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DECNRP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXCESM180_L-DECNRP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCESM180_L-DECNRP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EXTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXCESM180_L-EXTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCESM180_L-EXTNR.
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_REXCESM180_L_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
GJAHR TYPE STRING,
DECNR TYPE STRING,
LIFNR TYPE STRING,
RECID TYPE STRING,
REPID TYPE STRING,
NAMEREC TYPE STRING,
REGION TYPE STRING,
METHOD TYPE STRING,
KURSF TYPE STRING,
QSSHH TYPE STRING,
QBSHH TYPE STRING,
WAERS TYPE STRING,
AYEAR TYPE STRING,
INTRENO TYPE STRING,
XSTOR TYPE STRING,
DECID TYPE STRING,
NAMEDEC TYPE STRING,
MEDIUM TYPE STRING,
PNAME1 TYPE STRING,
PHONE1 TYPE STRING,
DECTYP TYPE STRING,
DECNRP TYPE STRING,
EXTNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXCESM180_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_REXCESM180_L_STR-MANDT sy-vline 
WA_REXCESM180_L_STR-BUKRS sy-vline 
WA_REXCESM180_L_STR-GJAHR sy-vline 
WA_REXCESM180_L_STR-DECNR sy-vline 
WA_REXCESM180_L_STR-LIFNR sy-vline 
WA_REXCESM180_L_STR-RECID sy-vline 
WA_REXCESM180_L_STR-REPID sy-vline 
WA_REXCESM180_L_STR-NAMEREC sy-vline 
WA_REXCESM180_L_STR-REGION sy-vline 
WA_REXCESM180_L_STR-METHOD sy-vline 
WA_REXCESM180_L_STR-KURSF sy-vline 
WA_REXCESM180_L_STR-QSSHH sy-vline 
WA_REXCESM180_L_STR-QBSHH sy-vline 
WA_REXCESM180_L_STR-WAERS sy-vline 
WA_REXCESM180_L_STR-AYEAR sy-vline 
WA_REXCESM180_L_STR-INTRENO sy-vline 
WA_REXCESM180_L_STR-XSTOR sy-vline 
WA_REXCESM180_L_STR-DECID sy-vline 
WA_REXCESM180_L_STR-NAMEDEC sy-vline 
WA_REXCESM180_L_STR-MEDIUM sy-vline 
WA_REXCESM180_L_STR-PNAME1 sy-vline 
WA_REXCESM180_L_STR-PHONE1 sy-vline 
WA_REXCESM180_L_STR-DECTYP sy-vline 
WA_REXCESM180_L_STR-DECNRP sy-vline 
WA_REXCESM180_L_STR-EXTNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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