ABAP Select data from SAP table T064F into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T064F 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 T064F. 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 T064F 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_T064F TYPE STANDARD TABLE OF T064F,
      WA_T064F TYPE T064F,
      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: <T064F> TYPE T064F.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T064F.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T064F
  INTO TABLE IT_T064F.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T064F
*  INTO TABLE @DATA(IT_T064F2).
*--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_T064F INDEX 1 INTO DATA(WA_T064F2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T064F ASSIGNING <T064F>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T064F>-FCODE = 1.
<T064F>-XBEAP = 1.
<T064F>-XSELP = 1.
<T064F>-XNEUP = 1.
<T064F>-XAENP = 1.

ENDLOOP.

LOOP AT IT_T064F INTO WA_T064F.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T064F-XANFP, sy-vline,
  WA_T064F-XLIST, sy-vline,
  WA_T064F-XLOEK, sy-vline,
  WA_T064F-XBUCH, sy-vline,
  WA_T064F-XENDE, sy-vline,
  WA_T064F-XENDM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T064F 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_T064F 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_T064F INTO WA_T064F.


*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_T064F_STR, 
FCODE TYPE STRING,
XBEAP TYPE STRING,
XSELP TYPE STRING,
XNEUP TYPE STRING,
XAENP TYPE STRING,
XANFP TYPE STRING,
XLIST TYPE STRING,
XLOEK TYPE STRING,
XBUCH TYPE STRING,
XENDE TYPE STRING,
XENDM TYPE STRING,
XDIAL TYPE STRING,
XPOSI TYPE STRING,
MARKE TYPE STRING,
ALLES TYPE STRING,
TCODE TYPE STRING,
XBACK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T064F_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_T064F_STR-FCODE sy-vline 
WA_T064F_STR-XBEAP sy-vline 
WA_T064F_STR-XSELP sy-vline 
WA_T064F_STR-XNEUP sy-vline 
WA_T064F_STR-XAENP sy-vline 
WA_T064F_STR-XANFP sy-vline 
WA_T064F_STR-XLIST sy-vline 
WA_T064F_STR-XLOEK sy-vline 
WA_T064F_STR-XBUCH sy-vline 
WA_T064F_STR-XENDE sy-vline 
WA_T064F_STR-XENDM sy-vline 
WA_T064F_STR-XDIAL sy-vline 
WA_T064F_STR-XPOSI sy-vline 
WA_T064F_STR-MARKE sy-vline 
WA_T064F_STR-ALLES sy-vline 
WA_T064F_STR-TCODE sy-vline 
WA_T064F_STR-XBACK sy-vline      INTO ld_text SEPARATED BY SPACE.

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