ABAP Select data from SAP table REXCC_MS_SCHEME into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP REXCC_MS_SCHEME 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_MS_SCHEME. 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_MS_SCHEME 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_MS_SCHEME TYPE STANDARD TABLE OF REXCC_MS_SCHEME,
      WA_REXCC_MS_SCHEME TYPE REXCC_MS_SCHEME,
      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_MS_SCHEME> TYPE REXCC_MS_SCHEME.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXCC_MS_SCHEME
*  INTO TABLE @DATA(IT_REXCC_MS_SCHEME2).
*--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_MS_SCHEME INDEX 1 INTO DATA(WA_REXCC_MS_SCHEME2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXCC_MS_SCHEME>-MANDT = 1.
<REXCC_MS_SCHEME>-SCHEME = 1.
<REXCC_MS_SCHEME>-CALCYEARFROM = 1.
<REXCC_MS_SCHEME>-CALCYEARTO = 1.
<REXCC_MS_SCHEME>-ISEXTERN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXCC_MS_SCHEME-DELETED, sy-vline,
  WA_REXCC_MS_SCHEME-RERF, sy-vline,
  WA_REXCC_MS_SCHEME-DERF, sy-vline,
  WA_REXCC_MS_SCHEME-TERF, sy-vline,
  WA_REXCC_MS_SCHEME-REHER, sy-vline,
  WA_REXCC_MS_SCHEME-RBEAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXCC_MS_SCHEME 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_MS_SCHEME 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_MS_SCHEME INTO WA_REXCC_MS_SCHEME.


*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 CALCYEARFROM
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_REXCC_MS_SCHEME-CALCYEARFROM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCC_MS_SCHEME-CALCYEARFROM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field CALCYEARTO
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_REXCC_MS_SCHEME-CALCYEARTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCC_MS_SCHEME-CALCYEARTO.
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_MS_SCHEME_STR, 
MANDT TYPE STRING,
SCHEME TYPE STRING,
CALCYEARFROM TYPE STRING,
CALCYEARTO TYPE STRING,
ISEXTERN TYPE STRING,
DELETED 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,END OF T_EKKO_STR.
DATA: WA_REXCC_MS_SCHEME_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_MS_SCHEME_STR-MANDT sy-vline 
WA_REXCC_MS_SCHEME_STR-SCHEME sy-vline 
WA_REXCC_MS_SCHEME_STR-CALCYEARFROM sy-vline 
WA_REXCC_MS_SCHEME_STR-CALCYEARTO sy-vline 
WA_REXCC_MS_SCHEME_STR-ISEXTERN sy-vline 
WA_REXCC_MS_SCHEME_STR-DELETED sy-vline 
WA_REXCC_MS_SCHEME_STR-RERF sy-vline 
WA_REXCC_MS_SCHEME_STR-DERF sy-vline 
WA_REXCC_MS_SCHEME_STR-TERF sy-vline 
WA_REXCC_MS_SCHEME_STR-REHER sy-vline 
WA_REXCC_MS_SCHEME_STR-RBEAR sy-vline 
WA_REXCC_MS_SCHEME_STR-DBEAR sy-vline 
WA_REXCC_MS_SCHEME_STR-TBEAR sy-vline 
WA_REXCC_MS_SCHEME_STR-RBHER sy-vline      INTO ld_text SEPARATED BY SPACE.

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