ABAP Select data from SAP table DB2ACCOR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB2ACCOR 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 DB2ACCOR. 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 DB2ACCOR 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_DB2ACCOR TYPE STANDARD TABLE OF DB2ACCOR,
      WA_DB2ACCOR TYPE DB2ACCOR,
      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: <DB2ACCOR> TYPE DB2ACCOR.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB2ACCOR.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB2ACCOR
  INTO TABLE IT_DB2ACCOR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB2ACCOR
*  INTO TABLE @DATA(IT_DB2ACCOR2).
*--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_DB2ACCOR INDEX 1 INTO DATA(WA_DB2ACCOR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB2ACCOR ASSIGNING <DB2ACCOR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB2ACCOR>-QUERYTYPE = 1.
<DB2ACCOR>-OBJECTTYPE = 1.
<DB2ACCOR>-ICTYPE = 1.
<DB2ACCOR>-STATSSCHEM = 1.
<DB2ACCOR>-CATLGSCHEM = 1.

ENDLOOP.

LOOP AT IT_DB2ACCOR INTO WA_DB2ACCOR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB2ACCOR-LOCALSCHEM, sy-vline,
  WA_DB2ACCOR-CHKLVL, sy-vline,
  WA_DB2ACCOR-CRITERIA, sy-vline,
  WA_DB2ACCOR-UNUSED, sy-vline,
  WA_DB2ACCOR-FCUPDPGS, sy-vline,
  WA_DB2ACCOR-FCCHGPCT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB2ACCOR 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_DB2ACCOR 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_DB2ACCOR INTO WA_DB2ACCOR.


*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_DB2ACCOR_STR, 
QUERYTYPE TYPE STRING,
OBJECTTYPE TYPE STRING,
ICTYPE TYPE STRING,
STATSSCHEM TYPE STRING,
CATLGSCHEM TYPE STRING,
LOCALSCHEM TYPE STRING,
CHKLVL TYPE STRING,
CRITERIA TYPE STRING,
UNUSED TYPE STRING,
FCUPDPGS TYPE STRING,
FCCHGPCT TYPE STRING,
FCDAYSCOPY TYPE STRING,
ICUPDPGS TYPE STRING,
ICCHGPCT TYPE STRING,
FCINDEXSIZ TYPE STRING,
RTINSDELUP TYPE STRING,
RTUNCLUST TYPE STRING,
RTLOBPCT TYPE STRING,
RTMASSDEL TYPE STRING,
RTINDREF TYPE STRING,
RIINSDEL TYPE STRING,
RIAPPINS TYPE STRING,
RIPSEUDODE TYPE STRING,
RIMASSDEL TYPE STRING,
RILEAFLIM TYPE STRING,
RINUMLEVEL TYPE STRING,
STINSDELP TYPE STRING,
STINSDELA TYPE STRING,
STMASSDEL TYPE STRING,
SIINSDELP TYPE STRING,
SIINSDELA TYPE STRING,
SIMASSDEL TYPE STRING,
EXTENTS TYPE STRING,
L_STATEMNT TYPE STRING,
RETURNCODE TYPE STRING,
ERRORMSG TYPE STRING,
IFCRETCODE TYPE STRING,
IFCRESCODE TYPE STRING,
XSBYTES TYPE STRING,
RTINSDELUPABS TYPE STRING,
RTACTIVEPAGES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB2ACCOR_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_DB2ACCOR_STR-QUERYTYPE sy-vline 
WA_DB2ACCOR_STR-OBJECTTYPE sy-vline 
WA_DB2ACCOR_STR-ICTYPE sy-vline 
WA_DB2ACCOR_STR-STATSSCHEM sy-vline 
WA_DB2ACCOR_STR-CATLGSCHEM sy-vline 
WA_DB2ACCOR_STR-LOCALSCHEM sy-vline 
WA_DB2ACCOR_STR-CHKLVL sy-vline 
WA_DB2ACCOR_STR-CRITERIA sy-vline 
WA_DB2ACCOR_STR-UNUSED sy-vline 
WA_DB2ACCOR_STR-FCUPDPGS sy-vline 
WA_DB2ACCOR_STR-FCCHGPCT sy-vline 
WA_DB2ACCOR_STR-FCDAYSCOPY sy-vline 
WA_DB2ACCOR_STR-ICUPDPGS sy-vline 
WA_DB2ACCOR_STR-ICCHGPCT sy-vline 
WA_DB2ACCOR_STR-FCINDEXSIZ sy-vline 
WA_DB2ACCOR_STR-RTINSDELUP sy-vline 
WA_DB2ACCOR_STR-RTUNCLUST sy-vline 
WA_DB2ACCOR_STR-RTLOBPCT sy-vline 
WA_DB2ACCOR_STR-RTMASSDEL sy-vline 
WA_DB2ACCOR_STR-RTINDREF sy-vline 
WA_DB2ACCOR_STR-RIINSDEL sy-vline 
WA_DB2ACCOR_STR-RIAPPINS sy-vline 
WA_DB2ACCOR_STR-RIPSEUDODE sy-vline 
WA_DB2ACCOR_STR-RIMASSDEL sy-vline 
WA_DB2ACCOR_STR-RILEAFLIM sy-vline 
WA_DB2ACCOR_STR-RINUMLEVEL sy-vline 
WA_DB2ACCOR_STR-STINSDELP sy-vline 
WA_DB2ACCOR_STR-STINSDELA sy-vline 
WA_DB2ACCOR_STR-STMASSDEL sy-vline 
WA_DB2ACCOR_STR-SIINSDELP sy-vline 
WA_DB2ACCOR_STR-SIINSDELA sy-vline 
WA_DB2ACCOR_STR-SIMASSDEL sy-vline 
WA_DB2ACCOR_STR-EXTENTS sy-vline 
WA_DB2ACCOR_STR-L_STATEMNT sy-vline 
WA_DB2ACCOR_STR-RETURNCODE sy-vline 
WA_DB2ACCOR_STR-ERRORMSG sy-vline 
WA_DB2ACCOR_STR-IFCRETCODE sy-vline 
WA_DB2ACCOR_STR-IFCRESCODE sy-vline 
WA_DB2ACCOR_STR-XSBYTES sy-vline 
WA_DB2ACCOR_STR-RTINSDELUPABS sy-vline 
WA_DB2ACCOR_STR-RTACTIVEPAGES sy-vline      INTO ld_text SEPARATED BY SPACE.

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