ABAP Select data from SAP table ENH_DY_STACK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ENH_DY_STACK
*  INTO TABLE @DATA(IT_ENH_DY_STACK2).
*--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_ENH_DY_STACK INDEX 1 INTO DATA(WA_ENH_DY_STACK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ENH_DY_STACK>-STACK = 1.
<ENH_DY_STACK>-SUBS = 1.
<ENH_DY_STACK>-FCODES = 1.
<ENH_DY_STACK>-STATUS_EXCL = 1.
<ENH_DY_STACK>-STATUS_INCL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ENH_DY_STACK-STATUS, sy-vline,
  WA_ENH_DY_STACK-DYNPRO, sy-vline,
  WA_ENH_DY_STACK-TABS_1, sy-vline,
  WA_ENH_DY_STACK-TABS_2, sy-vline,
  WA_ENH_DY_STACK-TABS_3, sy-vline,
  WA_ENH_DY_STACK-TABS_4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ENH_DY_STACK 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_ENH_DY_STACK 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_ENH_DY_STACK INTO WA_ENH_DY_STACK.


*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_ENH_DY_STACK_STR, 
STACK TYPE STRING,
SUBS TYPE STRING,
FCODES TYPE STRING,
STATUS_EXCL TYPE STRING,
STATUS_INCL TYPE STRING,
STATUS TYPE STRING,
DYNPRO TYPE STRING,
TABS_1 TYPE STRING,
TABS_2 TYPE STRING,
TABS_3 TYPE STRING,
TABS_4 TYPE STRING,
TABS_5 TYPE STRING,
TABS_6 TYPE STRING,
TABS_7 TYPE STRING,
TABS_8 TYPE STRING,
TABS_9 TYPE STRING,
TABS_A TYPE STRING,
TABS_B TYPE STRING,
TABS_C TYPE STRING,
TABS_D TYPE STRING,
TABS_E TYPE STRING,
TABS_F TYPE STRING,
PROG_1 TYPE STRING,
PROG_2 TYPE STRING,
PROG_3 TYPE STRING,
PROG_4 TYPE STRING,
PROG_5 TYPE STRING,
PROG_6 TYPE STRING,
PROG_7 TYPE STRING,
PROG_8 TYPE STRING,
PROG_9 TYPE STRING,
PROG_A TYPE STRING,
PROG_B TYPE STRING,
PROG_C TYPE STRING,
PROG_D TYPE STRING,
PROG_E TYPE STRING,
PROG_F TYPE STRING,
DYNP_1 TYPE STRING,
DYNP_2 TYPE STRING,
DYNP_3 TYPE STRING,
DYNP_4 TYPE STRING,
DYNP_5 TYPE STRING,
DYNP_6 TYPE STRING,
DYNP_7 TYPE STRING,
DYNP_8 TYPE STRING,
DYNP_9 TYPE STRING,
DYNP_A TYPE STRING,
DYNP_B TYPE STRING,
DYNP_C TYPE STRING,
DYNP_D TYPE STRING,
DYNP_E TYPE STRING,
DYNP_F TYPE STRING,
TABN_1 TYPE STRING,
TABN_2 TYPE STRING,
TABN_3 TYPE STRING,
TABN_4 TYPE STRING,
TABN_5 TYPE STRING,
TABN_6 TYPE STRING,
TABN_7 TYPE STRING,
TABN_8 TYPE STRING,
TABN_9 TYPE STRING,
TABN_A TYPE STRING,
TABN_B TYPE STRING,
TABN_C TYPE STRING,
TABN_D TYPE STRING,
TABN_E TYPE STRING,
TABN_F TYPE STRING,
ACTIVE_TAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ENH_DY_STACK_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_ENH_DY_STACK_STR-STACK sy-vline 
WA_ENH_DY_STACK_STR-SUBS sy-vline 
WA_ENH_DY_STACK_STR-FCODES sy-vline 
WA_ENH_DY_STACK_STR-STATUS_EXCL sy-vline 
WA_ENH_DY_STACK_STR-STATUS_INCL sy-vline 
WA_ENH_DY_STACK_STR-STATUS sy-vline 
WA_ENH_DY_STACK_STR-DYNPRO sy-vline 
WA_ENH_DY_STACK_STR-TABS_1 sy-vline 
WA_ENH_DY_STACK_STR-TABS_2 sy-vline 
WA_ENH_DY_STACK_STR-TABS_3 sy-vline 
WA_ENH_DY_STACK_STR-TABS_4 sy-vline 
WA_ENH_DY_STACK_STR-TABS_5 sy-vline 
WA_ENH_DY_STACK_STR-TABS_6 sy-vline 
WA_ENH_DY_STACK_STR-TABS_7 sy-vline 
WA_ENH_DY_STACK_STR-TABS_8 sy-vline 
WA_ENH_DY_STACK_STR-TABS_9 sy-vline 
WA_ENH_DY_STACK_STR-TABS_A sy-vline 
WA_ENH_DY_STACK_STR-TABS_B sy-vline 
WA_ENH_DY_STACK_STR-TABS_C sy-vline 
WA_ENH_DY_STACK_STR-TABS_D sy-vline 
WA_ENH_DY_STACK_STR-TABS_E sy-vline 
WA_ENH_DY_STACK_STR-TABS_F sy-vline 
WA_ENH_DY_STACK_STR-PROG_1 sy-vline 
WA_ENH_DY_STACK_STR-PROG_2 sy-vline 
WA_ENH_DY_STACK_STR-PROG_3 sy-vline 
WA_ENH_DY_STACK_STR-PROG_4 sy-vline 
WA_ENH_DY_STACK_STR-PROG_5 sy-vline 
WA_ENH_DY_STACK_STR-PROG_6 sy-vline 
WA_ENH_DY_STACK_STR-PROG_7 sy-vline 
WA_ENH_DY_STACK_STR-PROG_8 sy-vline 
WA_ENH_DY_STACK_STR-PROG_9 sy-vline 
WA_ENH_DY_STACK_STR-PROG_A sy-vline 
WA_ENH_DY_STACK_STR-PROG_B sy-vline 
WA_ENH_DY_STACK_STR-PROG_C sy-vline 
WA_ENH_DY_STACK_STR-PROG_D sy-vline 
WA_ENH_DY_STACK_STR-PROG_E sy-vline 
WA_ENH_DY_STACK_STR-PROG_F sy-vline 
WA_ENH_DY_STACK_STR-DYNP_1 sy-vline 
WA_ENH_DY_STACK_STR-DYNP_2 sy-vline 
WA_ENH_DY_STACK_STR-DYNP_3 sy-vline 
WA_ENH_DY_STACK_STR-DYNP_4 sy-vline 
WA_ENH_DY_STACK_STR-DYNP_5 sy-vline 
WA_ENH_DY_STACK_STR-DYNP_6 sy-vline 
WA_ENH_DY_STACK_STR-DYNP_7 sy-vline 
WA_ENH_DY_STACK_STR-DYNP_8 sy-vline 
WA_ENH_DY_STACK_STR-DYNP_9 sy-vline 
WA_ENH_DY_STACK_STR-DYNP_A sy-vline 
WA_ENH_DY_STACK_STR-DYNP_B sy-vline 
WA_ENH_DY_STACK_STR-DYNP_C sy-vline 
WA_ENH_DY_STACK_STR-DYNP_D sy-vline 
WA_ENH_DY_STACK_STR-DYNP_E sy-vline 
WA_ENH_DY_STACK_STR-DYNP_F sy-vline 
WA_ENH_DY_STACK_STR-TABN_1 sy-vline 
WA_ENH_DY_STACK_STR-TABN_2 sy-vline 
WA_ENH_DY_STACK_STR-TABN_3 sy-vline 
WA_ENH_DY_STACK_STR-TABN_4 sy-vline 
WA_ENH_DY_STACK_STR-TABN_5 sy-vline 
WA_ENH_DY_STACK_STR-TABN_6 sy-vline 
WA_ENH_DY_STACK_STR-TABN_7 sy-vline 
WA_ENH_DY_STACK_STR-TABN_8 sy-vline 
WA_ENH_DY_STACK_STR-TABN_9 sy-vline 
WA_ENH_DY_STACK_STR-TABN_A sy-vline 
WA_ENH_DY_STACK_STR-TABN_B sy-vline 
WA_ENH_DY_STACK_STR-TABN_C sy-vline 
WA_ENH_DY_STACK_STR-TABN_D sy-vline 
WA_ENH_DY_STACK_STR-TABN_E sy-vline 
WA_ENH_DY_STACK_STR-TABN_F sy-vline 
WA_ENH_DY_STACK_STR-ACTIVE_TAB sy-vline      INTO ld_text SEPARATED BY SPACE.

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