ABAP Select data from SAP table DB2IXBACK into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB2IXBACK 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 DB2IXBACK. 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 DB2IXBACK 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_DB2IXBACK TYPE STANDARD TABLE OF DB2IXBACK,
      WA_DB2IXBACK TYPE DB2IXBACK,
      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: <DB2IXBACK> TYPE DB2IXBACK.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB2IXBACK.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB2IXBACK
  INTO TABLE IT_DB2IXBACK.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB2IXBACK
*  INTO TABLE @DATA(IT_DB2IXBACK2).
*--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_DB2IXBACK INDEX 1 INTO DATA(WA_DB2IXBACK2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB2IXBACK ASSIGNING <DB2IXBACK>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB2IXBACK>-DATE_ANA = 1.
<DB2IXBACK>-TIME_ANA = 1.
<DB2IXBACK>-IXCREA = 1.
<DB2IXBACK>-IXNAM = 1.
<DB2IXBACK>-IXPART = 1.

ENDLOOP.

LOOP AT IT_DB2IXBACK INTO WA_DB2IXBACK.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB2IXBACK-CREATOR, sy-vline,
  WA_DB2IXBACK-NAME, sy-vline,
  WA_DB2IXBACK-TBCREATOR, sy-vline,
  WA_DB2IXBACK-TBNAME, sy-vline,
  WA_DB2IXBACK-UNIQUERULE, sy-vline,
  WA_DB2IXBACK-INDEXTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB2IXBACK 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_DB2IXBACK 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_DB2IXBACK INTO WA_DB2IXBACK.


*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_DB2IXBACK_STR, 
DATE_ANA TYPE STRING,
TIME_ANA TYPE STRING,
IXCREA TYPE STRING,
IXNAM TYPE STRING,
IXPART TYPE STRING,
CREATOR TYPE STRING,
NAME TYPE STRING,
TBCREATOR TYPE STRING,
TBNAME TYPE STRING,
UNIQUERULE TYPE STRING,
INDEXTYPE TYPE STRING,
INDEXSPACE TYPE STRING,
CLUSTERING TYPE STRING,
ERASERULE TYPE STRING,
CLOSERULE TYPE STRING,
COLCOUNT TYPE STRING,
DBID TYPE STRING,
DBNAME TYPE STRING,
BPOOL TYPE STRING,
PGSIZE TYPE STRING,
DSETPASS TYPE STRING,
PIECEIZE TYPE STRING,
COPY TYPE STRING,
PARTITIONS TYPE STRING,
PARTNR TYPE STRING,
OPERATION TYPE STRING,
NDAYS TYPE STRING,
LEAFDIST TYPE STRING,
EXTENTS TYPE STRING,
REASON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB2IXBACK_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_DB2IXBACK_STR-DATE_ANA sy-vline 
WA_DB2IXBACK_STR-TIME_ANA sy-vline 
WA_DB2IXBACK_STR-IXCREA sy-vline 
WA_DB2IXBACK_STR-IXNAM sy-vline 
WA_DB2IXBACK_STR-IXPART sy-vline 
WA_DB2IXBACK_STR-CREATOR sy-vline 
WA_DB2IXBACK_STR-NAME sy-vline 
WA_DB2IXBACK_STR-TBCREATOR sy-vline 
WA_DB2IXBACK_STR-TBNAME sy-vline 
WA_DB2IXBACK_STR-UNIQUERULE sy-vline 
WA_DB2IXBACK_STR-INDEXTYPE sy-vline 
WA_DB2IXBACK_STR-INDEXSPACE sy-vline 
WA_DB2IXBACK_STR-CLUSTERING sy-vline 
WA_DB2IXBACK_STR-ERASERULE sy-vline 
WA_DB2IXBACK_STR-CLOSERULE sy-vline 
WA_DB2IXBACK_STR-COLCOUNT sy-vline 
WA_DB2IXBACK_STR-DBID sy-vline 
WA_DB2IXBACK_STR-DBNAME sy-vline 
WA_DB2IXBACK_STR-BPOOL sy-vline 
WA_DB2IXBACK_STR-PGSIZE sy-vline 
WA_DB2IXBACK_STR-DSETPASS sy-vline 
WA_DB2IXBACK_STR-PIECEIZE sy-vline 
WA_DB2IXBACK_STR-COPY sy-vline 
WA_DB2IXBACK_STR-PARTITIONS sy-vline 
WA_DB2IXBACK_STR-PARTNR sy-vline 
WA_DB2IXBACK_STR-OPERATION sy-vline 
WA_DB2IXBACK_STR-NDAYS sy-vline 
WA_DB2IXBACK_STR-LEAFDIST sy-vline 
WA_DB2IXBACK_STR-EXTENTS sy-vline 
WA_DB2IXBACK_STR-REASON sy-vline      INTO ld_text SEPARATED BY SPACE.

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