ABAP Select data from SAP table REXC_AJRESVCH01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REXC_AJRESVCH01 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 REXC_AJRESVCH01. 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 REXC_AJRESVCH01 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_REXC_AJRESVCH01 TYPE STANDARD TABLE OF REXC_AJRESVCH01,
      WA_REXC_AJRESVCH01 TYPE REXC_AJRESVCH01,
      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: <REXC_AJRESVCH01> TYPE REXC_AJRESVCH01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REXC_AJRESVCH01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REXC_AJRESVCH01
  INTO TABLE IT_REXC_AJRESVCH01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXC_AJRESVCH01
*  INTO TABLE @DATA(IT_REXC_AJRESVCH012).
*--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_REXC_AJRESVCH01 INDEX 1 INTO DATA(WA_REXC_AJRESVCH012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REXC_AJRESVCH01 ASSIGNING <REXC_AJRESVCH01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXC_AJRESVCH01>-INTRENO = 1.
<REXC_AJRESVCH01>-CONDCURR = 1.
<REXC_AJRESVCH01>-MGRRESVDATE = 1.
<REXC_AJRESVCH01>-MGRRESVRATE = 1.
<REXC_AJRESVCH01>-MGRRESVPERCENT = 1.

ENDLOOP.

LOOP AT IT_REXC_AJRESVCH01 INTO WA_REXC_AJRESVCH01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXC_AJRESVCH01-MGRRESVAMOUNT, sy-vline,
  WA_REXC_AJRESVCH01-MOCRESVDATE, sy-vline,
  WA_REXC_AJRESVCH01-MOCRESVNBMONTH, sy-vline,
  WA_REXC_AJRESVCH01-MOCRESVPERCENT, sy-vline,
  WA_REXC_AJRESVCH01-MOCRESVAMOUNT, sy-vline,
  WA_REXC_AJRESVCH01-PPCRESVDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXC_AJRESVCH01 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_REXC_AJRESVCH01 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_REXC_AJRESVCH01 INTO WA_REXC_AJRESVCH01.


*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 DEC03, internal->external for field MGRRESVRATE
CALL FUNCTION 'CONVERSION_EXIT_DEC03_OUTPUT'
  EXPORTING
    input =                      WA_REXC_AJRESVCH01-MGRRESVRATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXC_AJRESVCH01-MGRRESVRATE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DEC03, internal->external for field PPCRESVINDX
CALL FUNCTION 'CONVERSION_EXIT_DEC03_OUTPUT'
  EXPORTING
    input =                      WA_REXC_AJRESVCH01-PPCRESVINDX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXC_AJRESVCH01-PPCRESVINDX.
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_REXC_AJRESVCH01_STR, 
INTRENO TYPE STRING,
CONDCURR TYPE STRING,
MGRRESVDATE TYPE STRING,
MGRRESVRATE TYPE STRING,
MGRRESVPERCENT TYPE STRING,
MGRRESVAMOUNT TYPE STRING,
MOCRESVDATE TYPE STRING,
MOCRESVNBMONTH TYPE STRING,
MOCRESVPERCENT TYPE STRING,
MOCRESVAMOUNT TYPE STRING,
PPCRESVDATE TYPE STRING,
PPCRESVINDX TYPE STRING,
PPCRESVPERCENT TYPE STRING,
PPCRESVAMOUNT TYPE STRING,
ACCOMRESVBASEAMOUNT TYPE STRING,
ACCOMRESVPERCENT TYPE STRING,
ACCOMRESVAMOUNT TYPE STRING,
YIELDRESVBASEAMOUNT TYPE STRING,
YIELDRESVPERCENT TYPE STRING,
YIELDRESVAMOUNT TYPE STRING,
WOIINRESVBASEAMOUNT TYPE STRING,
WOIINRESVPERCENT TYPE STRING,
WOIINRESVAMOUNT TYPE STRING,
RESVRELPERCENT TYPE STRING,
RESVRELAMOUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXC_AJRESVCH01_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_REXC_AJRESVCH01_STR-INTRENO sy-vline 
WA_REXC_AJRESVCH01_STR-CONDCURR sy-vline 
WA_REXC_AJRESVCH01_STR-MGRRESVDATE sy-vline 
WA_REXC_AJRESVCH01_STR-MGRRESVRATE sy-vline 
WA_REXC_AJRESVCH01_STR-MGRRESVPERCENT sy-vline 
WA_REXC_AJRESVCH01_STR-MGRRESVAMOUNT sy-vline 
WA_REXC_AJRESVCH01_STR-MOCRESVDATE sy-vline 
WA_REXC_AJRESVCH01_STR-MOCRESVNBMONTH sy-vline 
WA_REXC_AJRESVCH01_STR-MOCRESVPERCENT sy-vline 
WA_REXC_AJRESVCH01_STR-MOCRESVAMOUNT sy-vline 
WA_REXC_AJRESVCH01_STR-PPCRESVDATE sy-vline 
WA_REXC_AJRESVCH01_STR-PPCRESVINDX sy-vline 
WA_REXC_AJRESVCH01_STR-PPCRESVPERCENT sy-vline 
WA_REXC_AJRESVCH01_STR-PPCRESVAMOUNT sy-vline 
WA_REXC_AJRESVCH01_STR-ACCOMRESVBASEAMOUNT sy-vline 
WA_REXC_AJRESVCH01_STR-ACCOMRESVPERCENT sy-vline 
WA_REXC_AJRESVCH01_STR-ACCOMRESVAMOUNT sy-vline 
WA_REXC_AJRESVCH01_STR-YIELDRESVBASEAMOUNT sy-vline 
WA_REXC_AJRESVCH01_STR-YIELDRESVPERCENT sy-vline 
WA_REXC_AJRESVCH01_STR-YIELDRESVAMOUNT sy-vline 
WA_REXC_AJRESVCH01_STR-WOIINRESVBASEAMOUNT sy-vline 
WA_REXC_AJRESVCH01_STR-WOIINRESVPERCENT sy-vline 
WA_REXC_AJRESVCH01_STR-WOIINRESVAMOUNT sy-vline 
WA_REXC_AJRESVCH01_STR-RESVRELPERCENT sy-vline 
WA_REXC_AJRESVCH01_STR-RESVRELAMOUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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