ABAP Select data from SAP table ANKL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ANKL
*  INTO TABLE @DATA(IT_ANKL2).
*--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_ANKL INDEX 1 INTO DATA(WA_ANKL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ANKL>-MANDT = 1.
<ANKL>-KTOPL = 1.
<ANKL>-AFAPL = 1.
<ANKL>-KTO_I = 1.
<ANKL>-STAT_KTOGR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ANKL-KTOGR, sy-vline,
  WA_ANKL-KTGRTX, sy-vline,
  WA_ANKL-KTANSW, sy-vline,
  WA_ANKL-KTNAFB, sy-vline,
  WA_ANKL-KTNAFG, sy-vline,
  WA_ANKL-KTERLW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ANKL 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_ANKL 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_ANKL INTO WA_ANKL.


*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 KTO_I
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ANKL-KTO_I
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANKL-KTO_I.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field ANLKL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ANKL-ANLKL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANKL-ANLKL.
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_ANKL_STR, 
MANDT TYPE STRING,
KTOPL TYPE STRING,
AFAPL TYPE STRING,
KTO_I TYPE STRING,
STAT_KTOGR TYPE STRING,
KTOGR TYPE STRING,
KTGRTX TYPE STRING,
KTANSW TYPE STRING,
KTNAFB TYPE STRING,
KTNAFG TYPE STRING,
KTERLW TYPE STRING,
KTMIND TYPE STRING,
KTMEHR TYPE STRING,
STAT_NRKRS TYPE STRING,
NRRANGENR TYPE STRING,
FROMNUMBER TYPE STRING,
TONUMBER TYPE STRING,
EXTERNIND TYPE STRING,
STAT_FELEI TYPE STRING,
FELEI TYPE STRING,
FELEITXT30 TYPE STRING,
FKANN001 TYPE STRING,
FKANN002 TYPE STRING,
FKANN003 TYPE STRING,
FKANN004 TYPE STRING,
FKANN005 TYPE STRING,
FKANN006 TYPE STRING,
FKANN007 TYPE STRING,
FKANN008 TYPE STRING,
FKANN009 TYPE STRING,
FKANN010 TYPE STRING,
FKANN011 TYPE STRING,
FKANN012 TYPE STRING,
FKANN013 TYPE STRING,
STAT_ANLKL TYPE STRING,
ANLKL TYPE STRING,
ANLKLTXT50 TYPE STRING,
B1_AFASL TYPE STRING,
B1_NDJAR TYPE STRING,
B2_AFASL TYPE STRING,
B2_NDJAR TYPE STRING,
B2_WBIND TYPE STRING,
TYP_ANLKL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ANKL_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_ANKL_STR-MANDT sy-vline 
WA_ANKL_STR-KTOPL sy-vline 
WA_ANKL_STR-AFAPL sy-vline 
WA_ANKL_STR-KTO_I sy-vline 
WA_ANKL_STR-STAT_KTOGR sy-vline 
WA_ANKL_STR-KTOGR sy-vline 
WA_ANKL_STR-KTGRTX sy-vline 
WA_ANKL_STR-KTANSW sy-vline 
WA_ANKL_STR-KTNAFB sy-vline 
WA_ANKL_STR-KTNAFG sy-vline 
WA_ANKL_STR-KTERLW sy-vline 
WA_ANKL_STR-KTMIND sy-vline 
WA_ANKL_STR-KTMEHR sy-vline 
WA_ANKL_STR-STAT_NRKRS sy-vline 
WA_ANKL_STR-NRRANGENR sy-vline 
WA_ANKL_STR-FROMNUMBER sy-vline 
WA_ANKL_STR-TONUMBER sy-vline 
WA_ANKL_STR-EXTERNIND sy-vline 
WA_ANKL_STR-STAT_FELEI sy-vline 
WA_ANKL_STR-FELEI sy-vline 
WA_ANKL_STR-FELEITXT30 sy-vline 
WA_ANKL_STR-FKANN001 sy-vline 
WA_ANKL_STR-FKANN002 sy-vline 
WA_ANKL_STR-FKANN003 sy-vline 
WA_ANKL_STR-FKANN004 sy-vline 
WA_ANKL_STR-FKANN005 sy-vline 
WA_ANKL_STR-FKANN006 sy-vline 
WA_ANKL_STR-FKANN007 sy-vline 
WA_ANKL_STR-FKANN008 sy-vline 
WA_ANKL_STR-FKANN009 sy-vline 
WA_ANKL_STR-FKANN010 sy-vline 
WA_ANKL_STR-FKANN011 sy-vline 
WA_ANKL_STR-FKANN012 sy-vline 
WA_ANKL_STR-FKANN013 sy-vline 
WA_ANKL_STR-STAT_ANLKL sy-vline 
WA_ANKL_STR-ANLKL sy-vline 
WA_ANKL_STR-ANLKLTXT50 sy-vline 
WA_ANKL_STR-B1_AFASL sy-vline 
WA_ANKL_STR-B1_NDJAR sy-vline 
WA_ANKL_STR-B2_AFASL sy-vline 
WA_ANKL_STR-B2_NDJAR sy-vline 
WA_ANKL_STR-B2_WBIND sy-vline 
WA_ANKL_STR-TYP_ANLKL sy-vline      INTO ld_text SEPARATED BY SPACE.

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