ABAP Select data from SAP table DB2REOIDX into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB2REOIDX 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 DB2REOIDX. 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 DB2REOIDX 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_DB2REOIDX TYPE STANDARD TABLE OF DB2REOIDX,
      WA_DB2REOIDX TYPE DB2REOIDX,
      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: <DB2REOIDX> TYPE DB2REOIDX.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB2REOIDX.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB2REOIDX
  INTO TABLE IT_DB2REOIDX.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB2REOIDX
*  INTO TABLE @DATA(IT_DB2REOIDX2).
*--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_DB2REOIDX INDEX 1 INTO DATA(WA_DB2REOIDX2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB2REOIDX ASSIGNING <DB2REOIDX>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB2REOIDX>-IXNAME = 1.
<DB2REOIDX>-IXCREATOR = 1.
<DB2REOIDX>-PARTNO = 1.
<DB2REOIDX>-SHRLEVEL = 1.
<DB2REOIDX>-DEADLINE = 1.

ENDLOOP.

LOOP AT IT_DB2REOIDX INTO WA_DB2REOIDX.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB2REOIDX-MAXRO, sy-vline,
  WA_DB2REOIDX-LONGLOG, sy-vline,
  WA_DB2REOIDX-DELAY, sy-vline,
  WA_DB2REOIDX-UNLOAD, sy-vline,
  WA_DB2REOIDX-RECDSN, sy-vline,
  WA_DB2REOIDX-RECDEVT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB2REOIDX 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_DB2REOIDX 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_DB2REOIDX INTO WA_DB2REOIDX.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_DB2REOIDX_STR, 
IXNAME TYPE STRING,
IXCREATOR TYPE STRING,
PARTNO TYPE STRING,
SHRLEVEL TYPE STRING,
DEADLINE TYPE STRING,
MAXRO TYPE STRING,
LONGLOG TYPE STRING,
DELAY TYPE STRING,
UNLOAD TYPE STRING,
RECDSN TYPE STRING,
RECDEVT TYPE STRING,
RECSPACE TYPE STRING,
WORKDSN1 TYPE STRING,
WORKDEVT1 TYPE STRING,
WORKSPACE1 TYPE STRING,
WORKDSN2 TYPE STRING,
WORKDEVT2 TYPE STRING,
WORKSPACE2 TYPE STRING,
SORTDEVT TYPE STRING,
SORTNUM TYPE STRING,
PREFORMAT TYPE STRING,
RESTART TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB2REOIDX_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_DB2REOIDX_STR-IXNAME sy-vline 
WA_DB2REOIDX_STR-IXCREATOR sy-vline 
WA_DB2REOIDX_STR-PARTNO sy-vline 
WA_DB2REOIDX_STR-SHRLEVEL sy-vline 
WA_DB2REOIDX_STR-DEADLINE sy-vline 
WA_DB2REOIDX_STR-MAXRO sy-vline 
WA_DB2REOIDX_STR-LONGLOG sy-vline 
WA_DB2REOIDX_STR-DELAY sy-vline 
WA_DB2REOIDX_STR-UNLOAD sy-vline 
WA_DB2REOIDX_STR-RECDSN sy-vline 
WA_DB2REOIDX_STR-RECDEVT sy-vline 
WA_DB2REOIDX_STR-RECSPACE sy-vline 
WA_DB2REOIDX_STR-WORKDSN1 sy-vline 
WA_DB2REOIDX_STR-WORKDEVT1 sy-vline 
WA_DB2REOIDX_STR-WORKSPACE1 sy-vline 
WA_DB2REOIDX_STR-WORKDSN2 sy-vline 
WA_DB2REOIDX_STR-WORKDEVT2 sy-vline 
WA_DB2REOIDX_STR-WORKSPACE2 sy-vline 
WA_DB2REOIDX_STR-SORTDEVT sy-vline 
WA_DB2REOIDX_STR-SORTNUM sy-vline 
WA_DB2REOIDX_STR-PREFORMAT sy-vline 
WA_DB2REOIDX_STR-RESTART sy-vline      INTO ld_text SEPARATED BY SPACE.

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