ABAP Select data from SAP table TKEPPLDYNPF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TKEPPLDYNPF
*  INTO TABLE @DATA(IT_TKEPPLDYNPF2).
*--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_TKEPPLDYNPF INDEX 1 INTO DATA(WA_TKEPPLDYNPF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TKEPPLDYNPF>-APPLCLASS = 1.
<TKEPPLDYNPF>-SUBCLASS = 1.
<TKEPPLDYNPF>-PMODE = 1.
<TKEPPLDYNPF>-PROG = 1.
<TKEPPLDYNPF>-DNUM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TKEPPLDYNPF-TNAM, sy-vline,
  WA_TKEPPLDYNPF-FNAME, sy-vline,
  WA_TKEPPLDYNPF-SACTIVE, sy-vline,
  WA_TKEPPLDYNPF-SREQUIRED, sy-vline,
  WA_TKEPPLDYNPF-SOUTPUT, sy-vline,
  WA_TKEPPLDYNPF-SINPUT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TKEPPLDYNPF 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_TKEPPLDYNPF 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_TKEPPLDYNPF INTO WA_TKEPPLDYNPF.


*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_TKEPPLDYNPF_STR, 
APPLCLASS TYPE STRING,
SUBCLASS TYPE STRING,
PMODE TYPE STRING,
PROG TYPE STRING,
DNUM TYPE STRING,
TNAM TYPE STRING,
FNAME TYPE STRING,
SACTIVE TYPE STRING,
SREQUIRED TYPE STRING,
SOUTPUT TYPE STRING,
SINPUT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TKEPPLDYNPF_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_TKEPPLDYNPF_STR-APPLCLASS sy-vline 
WA_TKEPPLDYNPF_STR-SUBCLASS sy-vline 
WA_TKEPPLDYNPF_STR-PMODE sy-vline 
WA_TKEPPLDYNPF_STR-PROG sy-vline 
WA_TKEPPLDYNPF_STR-DNUM sy-vline 
WA_TKEPPLDYNPF_STR-TNAM sy-vline 
WA_TKEPPLDYNPF_STR-FNAME sy-vline 
WA_TKEPPLDYNPF_STR-SACTIVE sy-vline 
WA_TKEPPLDYNPF_STR-SREQUIRED sy-vline 
WA_TKEPPLDYNPF_STR-SOUTPUT sy-vline 
WA_TKEPPLDYNPF_STR-SINPUT sy-vline      INTO ld_text SEPARATED BY SPACE.

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