ABAP Select data from SAP table P06_T_DECL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P06_T_DECL 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 P06_T_DECL. 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 P06_T_DECL 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_P06_T_DECL TYPE STANDARD TABLE OF P06_T_DECL,
      WA_P06_T_DECL TYPE P06_T_DECL,
      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: <P06_T_DECL> TYPE P06_T_DECL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P06_T_DECL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P06_T_DECL
  INTO TABLE IT_P06_T_DECL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P06_T_DECL
*  INTO TABLE @DATA(IT_P06_T_DECL2).
*--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_P06_T_DECL INDEX 1 INTO DATA(WA_P06_T_DECL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P06_T_DECL ASSIGNING <P06_T_DECL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P06_T_DECL>-SECTN = 1.
<P06_T_DECL>-DESIR = 1.
<P06_T_DECL>-DERAS = 1.
<P06_T_DECL>-DEBEG = 1.
<P06_T_DECL>-DEEND = 1.

ENDLOOP.

LOOP AT IT_P06_T_DECL INTO WA_P06_T_DECL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P06_T_DECL-DENAT, sy-vline,
  WA_P06_T_DECL-DETYP, sy-vline,
  WA_P06_T_DECL-DEFRC, sy-vline,
  WA_P06_T_DECL-DERBG, sy-vline,
  WA_P06_T_DECL-DERED, sy-vline,
  WA_P06_T_DECL-DECUR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P06_T_DECL 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_P06_T_DECL 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_P06_T_DECL INTO WA_P06_T_DECL.


*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_P06_T_DECL_STR, 
SECTN TYPE STRING,
DESIR TYPE STRING,
DERAS TYPE STRING,
DEBEG TYPE STRING,
DEEND TYPE STRING,
DENAT TYPE STRING,
DETYP TYPE STRING,
DEFRC TYPE STRING,
DERBG TYPE STRING,
DERED TYPE STRING,
DECUR TYPE STRING,
DENIC TYPE STRING,
DECLT TYPE STRING,
DEORD TYPE STRING,
DEREF TYPE STRING,
DENUM TYPE STRING,
DEPER TYPE STRING,
DEPNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P06_T_DECL_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_P06_T_DECL_STR-SECTN sy-vline 
WA_P06_T_DECL_STR-DESIR sy-vline 
WA_P06_T_DECL_STR-DERAS sy-vline 
WA_P06_T_DECL_STR-DEBEG sy-vline 
WA_P06_T_DECL_STR-DEEND sy-vline 
WA_P06_T_DECL_STR-DENAT sy-vline 
WA_P06_T_DECL_STR-DETYP sy-vline 
WA_P06_T_DECL_STR-DEFRC sy-vline 
WA_P06_T_DECL_STR-DERBG sy-vline 
WA_P06_T_DECL_STR-DERED sy-vline 
WA_P06_T_DECL_STR-DECUR sy-vline 
WA_P06_T_DECL_STR-DENIC sy-vline 
WA_P06_T_DECL_STR-DECLT sy-vline 
WA_P06_T_DECL_STR-DEORD sy-vline 
WA_P06_T_DECL_STR-DEREF sy-vline 
WA_P06_T_DECL_STR-DENUM sy-vline 
WA_P06_T_DECL_STR-DEPER sy-vline 
WA_P06_T_DECL_STR-DEPNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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