ABAP Select data from SAP table GTY_DETAIL_DB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GTY_DETAIL_DB
*  INTO TABLE @DATA(IT_GTY_DETAIL_DB2).
*--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_GTY_DETAIL_DB INDEX 1 INTO DATA(WA_GTY_DETAIL_DB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GTY_DETAIL_DB>-CONNECTION_NAME = 1.
<GTY_DETAIL_DB>-DBCALLTI = 1.
<GTY_DETAIL_DB>-DBCALLS = 1.
<GTY_DETAIL_DB>-COMMITTI = 1.
<GTY_DETAIL_DB>-DBPROCCNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GTY_DETAIL_DB-DBPROCTI, sy-vline,
  WA_GTY_DETAIL_DB-RECCNT, sy-vline,
  WA_GTY_DETAIL_DB-BUFCALLS, sy-vline,
  WA_GTY_DETAIL_DB-PHYCALLS, sy-vline,
  WA_GTY_DETAIL_DB-AVTDB, sy-vline,
  WA_GTY_DETAIL_DB-READCNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GTY_DETAIL_DB 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_GTY_DETAIL_DB 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_GTY_DETAIL_DB INTO WA_GTY_DETAIL_DB.


*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_GTY_DETAIL_DB_STR, 
CONNECTION_NAME TYPE STRING,
DBCALLTI TYPE STRING,
DBCALLS TYPE STRING,
COMMITTI TYPE STRING,
DBPROCCNT TYPE STRING,
DBPROCTI TYPE STRING,
RECCNT TYPE STRING,
BUFCALLS TYPE STRING,
PHYCALLS TYPE STRING,
AVTDB TYPE STRING,
READCNT TYPE STRING,
READDIRREC TYPE STRING,
READDIRCNT TYPE STRING,
READDIRBUF TYPE STRING,
READDIRTI TYPE STRING,
AVTREADDIR TYPE STRING,
READSEQREC TYPE STRING,
READSEQCNT TYPE STRING,
READSEQBUF TYPE STRING,
PHYREADCNT TYPE STRING,
READSEQTI TYPE STRING,
AVTREADSEQ TYPE STRING,
UPDREC TYPE STRING,
UPDCNT TYPE STRING,
PHYUPDCNT TYPE STRING,
UPDTI TYPE STRING,
AVTUPD TYPE STRING,
DELREC TYPE STRING,
DELCNT TYPE STRING,
PHYDELCNT TYPE STRING,
DELTI TYPE STRING,
AVTDEL TYPE STRING,
INSREC TYPE STRING,
INSCNT TYPE STRING,
PHYINSCNT TYPE STRING,
INSTI TYPE STRING,
AVTINS TYPE STRING,
PHYREADDIR TYPE STRING,
CHNGCNT TYPE STRING,
PHYCHNGCNT TYPE STRING,
CHNGTI TYPE STRING,
READTI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GTY_DETAIL_DB_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_GTY_DETAIL_DB_STR-CONNECTION_NAME sy-vline 
WA_GTY_DETAIL_DB_STR-DBCALLTI sy-vline 
WA_GTY_DETAIL_DB_STR-DBCALLS sy-vline 
WA_GTY_DETAIL_DB_STR-COMMITTI sy-vline 
WA_GTY_DETAIL_DB_STR-DBPROCCNT sy-vline 
WA_GTY_DETAIL_DB_STR-DBPROCTI sy-vline 
WA_GTY_DETAIL_DB_STR-RECCNT sy-vline 
WA_GTY_DETAIL_DB_STR-BUFCALLS sy-vline 
WA_GTY_DETAIL_DB_STR-PHYCALLS sy-vline 
WA_GTY_DETAIL_DB_STR-AVTDB sy-vline 
WA_GTY_DETAIL_DB_STR-READCNT sy-vline 
WA_GTY_DETAIL_DB_STR-READDIRREC sy-vline 
WA_GTY_DETAIL_DB_STR-READDIRCNT sy-vline 
WA_GTY_DETAIL_DB_STR-READDIRBUF sy-vline 
WA_GTY_DETAIL_DB_STR-READDIRTI sy-vline 
WA_GTY_DETAIL_DB_STR-AVTREADDIR sy-vline 
WA_GTY_DETAIL_DB_STR-READSEQREC sy-vline 
WA_GTY_DETAIL_DB_STR-READSEQCNT sy-vline 
WA_GTY_DETAIL_DB_STR-READSEQBUF sy-vline 
WA_GTY_DETAIL_DB_STR-PHYREADCNT sy-vline 
WA_GTY_DETAIL_DB_STR-READSEQTI sy-vline 
WA_GTY_DETAIL_DB_STR-AVTREADSEQ sy-vline 
WA_GTY_DETAIL_DB_STR-UPDREC sy-vline 
WA_GTY_DETAIL_DB_STR-UPDCNT sy-vline 
WA_GTY_DETAIL_DB_STR-PHYUPDCNT sy-vline 
WA_GTY_DETAIL_DB_STR-UPDTI sy-vline 
WA_GTY_DETAIL_DB_STR-AVTUPD sy-vline 
WA_GTY_DETAIL_DB_STR-DELREC sy-vline 
WA_GTY_DETAIL_DB_STR-DELCNT sy-vline 
WA_GTY_DETAIL_DB_STR-PHYDELCNT sy-vline 
WA_GTY_DETAIL_DB_STR-DELTI sy-vline 
WA_GTY_DETAIL_DB_STR-AVTDEL sy-vline 
WA_GTY_DETAIL_DB_STR-INSREC sy-vline 
WA_GTY_DETAIL_DB_STR-INSCNT sy-vline 
WA_GTY_DETAIL_DB_STR-PHYINSCNT sy-vline 
WA_GTY_DETAIL_DB_STR-INSTI sy-vline 
WA_GTY_DETAIL_DB_STR-AVTINS sy-vline 
WA_GTY_DETAIL_DB_STR-PHYREADDIR sy-vline 
WA_GTY_DETAIL_DB_STR-CHNGCNT sy-vline 
WA_GTY_DETAIL_DB_STR-PHYCHNGCNT sy-vline 
WA_GTY_DETAIL_DB_STR-CHNGTI sy-vline 
WA_GTY_DETAIL_DB_STR-READTI sy-vline      INTO ld_text SEPARATED BY SPACE.

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