ABAP Select data from SAP table QKATL into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP QKATL 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 QKATL. 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 QKATL 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_QKATL TYPE STANDARD TABLE OF QKATL,
      WA_QKATL TYPE QKATL,
      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: <QKATL> TYPE QKATL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QKATL
*  INTO TABLE @DATA(IT_QKATL2).
*--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_QKATL INDEX 1 INTO DATA(WA_QKATL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QKATL>-WERK = 1.
<QKATL>-PMTNR = 1.
<QKATL>-VERSION = 1.
<QKATL>-KATAB1 = 1.
<QKATL>-KATALGART1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QKATL-AUSWMENGE1, sy-vline,
  WA_QKATL-VERSION1, sy-vline,
  WA_QKATL-AUSWMGWRK1, sy-vline,
  WA_QKATL-LSPER1, sy-vline,
  WA_QKATL-KATAB2, sy-vline,
  WA_QKATL-KATALGART2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QKATL 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_QKATL 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_QKATL INTO WA_QKATL.


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

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

*Conversion exit ALPHA, internal->external for field VERSION1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QKATL-VERSION1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QKATL-VERSION1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERSION2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QKATL-VERSION2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QKATL-VERSION2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERSION3
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QKATL-VERSION3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QKATL-VERSION3.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERSION4
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QKATL-VERSION4
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QKATL-VERSION4.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERSION5
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QKATL-VERSION5
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QKATL-VERSION5.
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_QKATL_STR, 
WERK TYPE STRING,
PMTNR TYPE STRING,
VERSION TYPE STRING,
KATAB1 TYPE STRING,
KATALGART1 TYPE STRING,
AUSWMENGE1 TYPE STRING,
VERSION1 TYPE STRING,
AUSWMGWRK1 TYPE STRING,
LSPER1 TYPE STRING,
KATAB2 TYPE STRING,
KATALGART2 TYPE STRING,
AUSWMENGE2 TYPE STRING,
VERSION2 TYPE STRING,
AUSWMGWRK2 TYPE STRING,
LSPER2 TYPE STRING,
KATAB3 TYPE STRING,
KATALGART3 TYPE STRING,
AUSWMENGE3 TYPE STRING,
VERSION3 TYPE STRING,
AUSWMGWRK3 TYPE STRING,
LSPER3 TYPE STRING,
KATAB4 TYPE STRING,
KATALGART4 TYPE STRING,
AUSWMENGE4 TYPE STRING,
VERSION4 TYPE STRING,
AUSWMGWRK4 TYPE STRING,
LSPER4 TYPE STRING,
KATAB5 TYPE STRING,
KATALGART5 TYPE STRING,
AUSWMENGE5 TYPE STRING,
VERSION5 TYPE STRING,
AUSWMGWRK5 TYPE STRING,
LSPER5 TYPE STRING,
AWMNGKTX1 TYPE STRING,
AWMNGKTX2 TYPE STRING,
AWMNGKTX3 TYPE STRING,
AWMNGKTX4 TYPE STRING,
AWMNGKTX5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QKATL_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_QKATL_STR-WERK sy-vline 
WA_QKATL_STR-PMTNR sy-vline 
WA_QKATL_STR-VERSION sy-vline 
WA_QKATL_STR-KATAB1 sy-vline 
WA_QKATL_STR-KATALGART1 sy-vline 
WA_QKATL_STR-AUSWMENGE1 sy-vline 
WA_QKATL_STR-VERSION1 sy-vline 
WA_QKATL_STR-AUSWMGWRK1 sy-vline 
WA_QKATL_STR-LSPER1 sy-vline 
WA_QKATL_STR-KATAB2 sy-vline 
WA_QKATL_STR-KATALGART2 sy-vline 
WA_QKATL_STR-AUSWMENGE2 sy-vline 
WA_QKATL_STR-VERSION2 sy-vline 
WA_QKATL_STR-AUSWMGWRK2 sy-vline 
WA_QKATL_STR-LSPER2 sy-vline 
WA_QKATL_STR-KATAB3 sy-vline 
WA_QKATL_STR-KATALGART3 sy-vline 
WA_QKATL_STR-AUSWMENGE3 sy-vline 
WA_QKATL_STR-VERSION3 sy-vline 
WA_QKATL_STR-AUSWMGWRK3 sy-vline 
WA_QKATL_STR-LSPER3 sy-vline 
WA_QKATL_STR-KATAB4 sy-vline 
WA_QKATL_STR-KATALGART4 sy-vline 
WA_QKATL_STR-AUSWMENGE4 sy-vline 
WA_QKATL_STR-VERSION4 sy-vline 
WA_QKATL_STR-AUSWMGWRK4 sy-vline 
WA_QKATL_STR-LSPER4 sy-vline 
WA_QKATL_STR-KATAB5 sy-vline 
WA_QKATL_STR-KATALGART5 sy-vline 
WA_QKATL_STR-AUSWMENGE5 sy-vline 
WA_QKATL_STR-VERSION5 sy-vline 
WA_QKATL_STR-AUSWMGWRK5 sy-vline 
WA_QKATL_STR-LSPER5 sy-vline 
WA_QKATL_STR-AWMNGKTX1 sy-vline 
WA_QKATL_STR-AWMNGKTX2 sy-vline 
WA_QKATL_STR-AWMNGKTX3 sy-vline 
WA_QKATL_STR-AWMNGKTX4 sy-vline 
WA_QKATL_STR-AWMNGKTX5 sy-vline      INTO ld_text SEPARATED BY SPACE.

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