ABAP Select data from SAP table GTY_DETAIL_TASK 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_TASK 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_TASK. 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_TASK 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_TASK TYPE STANDARD TABLE OF GTY_DETAIL_TASK,
      WA_GTY_DETAIL_TASK TYPE GTY_DETAIL_TASK,
      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_TASK> TYPE GTY_DETAIL_TASK.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GTY_DETAIL_TASK
*  INTO TABLE @DATA(IT_GTY_DETAIL_TASK2).
*--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_TASK INDEX 1 INTO DATA(WA_GTY_DETAIL_TASK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GTY_DETAIL_TASK>-TERMINALID = 1.
<GTY_DETAIL_TASK>-INPUTLEN = 1.
<GTY_DETAIL_TASK>-OUTPUTLEN = 1.
<GTY_DETAIL_TASK>-MANDT = 1.
<GTY_DETAIL_TASK>-TT_STR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GTY_DETAIL_TASK-WPID, sy-vline,
  WA_GTY_DETAIL_TASK-MAINMODE, sy-vline,
  WA_GTY_DETAIL_TASK-SUBMODE, sy-vline,
  WA_GTY_DETAIL_TASK-TRANSID, sy-vline,
  WA_GTY_DETAIL_TASK-CONTEXT_ID, sy-vline,
  WA_GTY_DETAIL_TASK-DIALOG_STEP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GTY_DETAIL_TASK 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_TASK 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_TASK INTO WA_GTY_DETAIL_TASK.


*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_TASK_STR, 
TERMINALID TYPE STRING,
INPUTLEN TYPE STRING,
OUTPUTLEN TYPE STRING,
MANDT TYPE STRING,
TT_STR TYPE STRING,
WPID TYPE STRING,
MAINMODE TYPE STRING,
SUBMODE TYPE STRING,
TRANSID TYPE STRING,
CONTEXT_ID TYPE STRING,
DIALOG_STEP TYPE STRING,
QUETI TYPE STRING,
RFCTI TYPE STRING,
DDICTI TYPE STRING,
MAXMEM TYPE STRING,
MAXROLL TYPE STRING,
MAXPAGE TYPE STRING,
MAXBYTES TYPE STRING,
MAXBYTESDI TYPE STRING,
USEDBYTES TYPE STRING,
PRIVSUM TYPE STRING,
ABGC_RUN_COUNT TYPE STRING,
ABGC_TIME TYPE STRING,
ABGC_FREED_OBJS TYPE STRING,
ABGC_ALLOC_OBJS TYPE STRING,
ABGC_CALLED_EXPL TYPE STRING,
PRIVMODE TYPE STRING,
WPRESTART TYPE STRING,
TCODE TYPE STRING,
DYNPRONR TYPE STRING,
CUA_PROG TYPE STRING,
CUA_FUNC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GTY_DETAIL_TASK_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_TASK_STR-TERMINALID sy-vline 
WA_GTY_DETAIL_TASK_STR-INPUTLEN sy-vline 
WA_GTY_DETAIL_TASK_STR-OUTPUTLEN sy-vline 
WA_GTY_DETAIL_TASK_STR-MANDT sy-vline 
WA_GTY_DETAIL_TASK_STR-TT_STR sy-vline 
WA_GTY_DETAIL_TASK_STR-WPID sy-vline 
WA_GTY_DETAIL_TASK_STR-MAINMODE sy-vline 
WA_GTY_DETAIL_TASK_STR-SUBMODE sy-vline 
WA_GTY_DETAIL_TASK_STR-TRANSID sy-vline 
WA_GTY_DETAIL_TASK_STR-CONTEXT_ID sy-vline 
WA_GTY_DETAIL_TASK_STR-DIALOG_STEP sy-vline 
WA_GTY_DETAIL_TASK_STR-QUETI sy-vline 
WA_GTY_DETAIL_TASK_STR-RFCTI sy-vline 
WA_GTY_DETAIL_TASK_STR-DDICTI sy-vline 
WA_GTY_DETAIL_TASK_STR-MAXMEM sy-vline 
WA_GTY_DETAIL_TASK_STR-MAXROLL sy-vline 
WA_GTY_DETAIL_TASK_STR-MAXPAGE sy-vline 
WA_GTY_DETAIL_TASK_STR-MAXBYTES sy-vline 
WA_GTY_DETAIL_TASK_STR-MAXBYTESDI sy-vline 
WA_GTY_DETAIL_TASK_STR-USEDBYTES sy-vline 
WA_GTY_DETAIL_TASK_STR-PRIVSUM sy-vline 
WA_GTY_DETAIL_TASK_STR-ABGC_RUN_COUNT sy-vline 
WA_GTY_DETAIL_TASK_STR-ABGC_TIME sy-vline 
WA_GTY_DETAIL_TASK_STR-ABGC_FREED_OBJS sy-vline 
WA_GTY_DETAIL_TASK_STR-ABGC_ALLOC_OBJS sy-vline 
WA_GTY_DETAIL_TASK_STR-ABGC_CALLED_EXPL sy-vline 
WA_GTY_DETAIL_TASK_STR-PRIVMODE sy-vline 
WA_GTY_DETAIL_TASK_STR-WPRESTART sy-vline 
WA_GTY_DETAIL_TASK_STR-TCODE sy-vline 
WA_GTY_DETAIL_TASK_STR-DYNPRONR sy-vline 
WA_GTY_DETAIL_TASK_STR-CUA_PROG sy-vline 
WA_GTY_DETAIL_TASK_STR-CUA_FUNC sy-vline      INTO ld_text SEPARATED BY SPACE.

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