ABAP Select data from SAP table DBSNP 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 DBSNP 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 DBSNP. 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 DBSNP 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_DBSNP TYPE STANDARD TABLE OF DBSNP,
      WA_DBSNP TYPE DBSNP,
      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: <DBSNP> TYPE DBSNP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DBSNP
*  INTO TABLE @DATA(IT_DBSNP2).
*--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_DBSNP INDEX 1 INTO DATA(WA_DBSNP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DBSNP>-RECORDDATE = 1.
<DBSNP>-RECORDTIME = 1.
<DBSNP>-DB_INSTANC = 1.
<DBSNP>-BUSYWAITS = 1.
<DBSNP>-WAITTIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DBSNP-CONSISTGET, sy-vline,
  WA_DBSNP-BLOCKGETS, sy-vline,
  WA_DBSNP-PARSECOUNT, sy-vline,
  WA_DBSNP-PHYSIREADS, sy-vline,
  WA_DBSNP-PHYSIWRITE, sy-vline,
  WA_DBSNP-RECURCALLS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DBSNP 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_DBSNP 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_DBSNP INTO WA_DBSNP.


*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_DBSNP_STR, 
RECORDDATE TYPE STRING,
RECORDTIME TYPE STRING,
DB_INSTANC TYPE STRING,
BUSYWAITS TYPE STRING,
WAITTIME TYPE STRING,
CONSISTGET TYPE STRING,
BLOCKGETS TYPE STRING,
PARSECOUNT TYPE STRING,
PHYSIREADS TYPE STRING,
PHYSIWRITE TYPE STRING,
RECURCALLS TYPE STRING,
REDOBLKWRI TYPE STRING,
REDOWTIME TYPE STRING,
FETCHROWID TYPE STRING,
FETCONTROW TYPE STRING,
SCANBLKGOT TYPE STRING,
SCANROWGOT TYPE STRING,
SCANLONG TYPE STRING,
SCANSHORT TYPE STRING,
USERCALLS TYPE STRING,
USERCOMMIT TYPE STRING,
USRROLLBAC TYPE STRING,
PHYSREADSDIRECT TYPE STRING,
SESSLOGREADS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DBSNP_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_DBSNP_STR-RECORDDATE sy-vline 
WA_DBSNP_STR-RECORDTIME sy-vline 
WA_DBSNP_STR-DB_INSTANC sy-vline 
WA_DBSNP_STR-BUSYWAITS sy-vline 
WA_DBSNP_STR-WAITTIME sy-vline 
WA_DBSNP_STR-CONSISTGET sy-vline 
WA_DBSNP_STR-BLOCKGETS sy-vline 
WA_DBSNP_STR-PARSECOUNT sy-vline 
WA_DBSNP_STR-PHYSIREADS sy-vline 
WA_DBSNP_STR-PHYSIWRITE sy-vline 
WA_DBSNP_STR-RECURCALLS sy-vline 
WA_DBSNP_STR-REDOBLKWRI sy-vline 
WA_DBSNP_STR-REDOWTIME sy-vline 
WA_DBSNP_STR-FETCHROWID sy-vline 
WA_DBSNP_STR-FETCONTROW sy-vline 
WA_DBSNP_STR-SCANBLKGOT sy-vline 
WA_DBSNP_STR-SCANROWGOT sy-vline 
WA_DBSNP_STR-SCANLONG sy-vline 
WA_DBSNP_STR-SCANSHORT sy-vline 
WA_DBSNP_STR-USERCALLS sy-vline 
WA_DBSNP_STR-USERCOMMIT sy-vline 
WA_DBSNP_STR-USRROLLBAC sy-vline 
WA_DBSNP_STR-PHYSREADSDIRECT sy-vline 
WA_DBSNP_STR-SESSLOGREADS sy-vline      INTO ld_text SEPARATED BY SPACE.

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