ABAP Select data from SAP table TF646 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TF646 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 TF646. 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 TF646 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_TF646 TYPE STANDARD TABLE OF TF646,
      WA_TF646 TYPE TF646,
      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: <TF646> TYPE TF646.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TF646.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TF646
  INTO TABLE IT_TF646.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TF646
*  INTO TABLE @DATA(IT_TF6462).
*--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_TF646 INDEX 1 INTO DATA(WA_TF6462).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TF646 ASSIGNING <TF646>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TF646>-MANDT = 1.
<TF646>-DIMEN = 1.
<TF646>-ITCLG = 1.
<TF646>-RVERS = 1.
<TF646>-CONGR = 1.

ENDLOOP.

LOOP AT IT_TF646 INTO WA_TF646.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TF646-COICU, sy-vline,
  WA_TF646-CYEAR, sy-vline,
  WA_TF646-CPERI, sy-vline,
  WA_TF646-BUNIT, sy-vline,
  WA_TF646-BUPTR, sy-vline,
  WA_TF646-HRES1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TF646 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_TF646 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_TF646 INTO WA_TF646.


*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.

*Conversion exit ALPHA, internal->external for field RVERS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TF646-RVERS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-RVERS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AFIMC, internal->external for field CONGR
CALL FUNCTION 'CONVERSION_EXIT_AFIMC_OUTPUT'
  EXPORTING
    input =                      WA_TF646-CONGR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-CONGR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AFIMC, internal->external for field COICU
CALL FUNCTION 'CONVERSION_EXIT_AFIMC_OUTPUT'
  EXPORTING
    input =                      WA_TF646-COICU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-COICU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field CYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TF646-CYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-CYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AFIMC, internal->external for field BUNIT
CALL FUNCTION 'CONVERSION_EXIT_AFIMC_OUTPUT'
  EXPORTING
    input =                      WA_TF646-BUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-BUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AFIMC, internal->external for field BUPTR
CALL FUNCTION 'CONVERSION_EXIT_AFIMC_OUTPUT'
  EXPORTING
    input =                      WA_TF646-BUPTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-BUPTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COINR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TF646-COINR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-COINR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field AYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TF646-AYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-AYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TF646-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-RLDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field VGRAP
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_TF646-VGRAP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-VGRAP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field VALAP
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_TF646-VALAP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-VALAP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field VALDP
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_TF646-VALDP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-VALDP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field VALBG
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_TF646-VALBG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-VALBG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field VALDN
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_TF646-VALDN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-VALDN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field VALDE
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_TF646-VALDE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-VALDE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field VALWU
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_TF646-VALWU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-VALWU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field VALDA
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_TF646-VALDA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-VALDA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field VALDD
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_TF646-VALDD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-VALDD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field VALEN
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_TF646-VALEN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF646-VALEN.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_TF646_STR, 
MANDT TYPE STRING,
DIMEN TYPE STRING,
ITCLG TYPE STRING,
RVERS TYPE STRING,
CONGR TYPE STRING,
COICU TYPE STRING,
CYEAR TYPE STRING,
CPERI TYPE STRING,
BUNIT TYPE STRING,
BUPTR TYPE STRING,
HRES1 TYPE STRING,
HRES2 TYPE STRING,
COIAC TYPE STRING,
COINR TYPE STRING,
AYEAR TYPE STRING,
APERI TYPE STRING,
RLDNR TYPE STRING,
VGRAP TYPE STRING,
VALAP TYPE STRING,
VALDP TYPE STRING,
VALBG TYPE STRING,
VALDN TYPE STRING,
VALDE TYPE STRING,
VALWU TYPE STRING,
VALDA TYPE STRING,
VALDD TYPE STRING,
VALEN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TF646_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_TF646_STR-MANDT sy-vline 
WA_TF646_STR-DIMEN sy-vline 
WA_TF646_STR-ITCLG sy-vline 
WA_TF646_STR-RVERS sy-vline 
WA_TF646_STR-CONGR sy-vline 
WA_TF646_STR-COICU sy-vline 
WA_TF646_STR-CYEAR sy-vline 
WA_TF646_STR-CPERI sy-vline 
WA_TF646_STR-BUNIT sy-vline 
WA_TF646_STR-BUPTR sy-vline 
WA_TF646_STR-HRES1 sy-vline 
WA_TF646_STR-HRES2 sy-vline 
WA_TF646_STR-COIAC sy-vline 
WA_TF646_STR-COINR sy-vline 
WA_TF646_STR-AYEAR sy-vline 
WA_TF646_STR-APERI sy-vline 
WA_TF646_STR-RLDNR sy-vline 
WA_TF646_STR-VGRAP sy-vline 
WA_TF646_STR-VALAP sy-vline 
WA_TF646_STR-VALDP sy-vline 
WA_TF646_STR-VALBG sy-vline 
WA_TF646_STR-VALDN sy-vline 
WA_TF646_STR-VALDE sy-vline 
WA_TF646_STR-VALWU sy-vline 
WA_TF646_STR-VALDA sy-vline 
WA_TF646_STR-VALDD sy-vline 
WA_TF646_STR-VALEN sy-vline      INTO ld_text SEPARATED BY SPACE.

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