ABAP Select data from SAP table U_26197 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP U_26197 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 U_26197. 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 U_26197 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_U_26197 TYPE STANDARD TABLE OF U_26197,
      WA_U_26197 TYPE U_26197,
      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: <U_26197> TYPE U_26197.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U_26197.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U_26197
  INTO TABLE IT_U_26197.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U_26197
*  INTO TABLE @DATA(IT_U_261972).
*--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_U_26197 INDEX 1 INTO DATA(WA_U_261972).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U_26197 ASSIGNING <U_26197>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U_26197>-MANDT = 1.
<U_26197>-KNUMH = 1.
<U_26197>-KNRMM = 1.
<U_26197>-KNRNM = 1.
<U_26197>-KNRME = 1.

ENDLOOP.

LOOP AT IT_U_26197 INTO WA_U_26197.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U_26197-KNRZM, sy-vline,
  WA_U_26197-KNREZ, sy-vline,
  WA_U_26197-KNRRR, sy-vline,
  WA_U_26197-KNRDD, sy-vline,
  WA_U_26197-KOTABNR, sy-vline,
  WA_U_26197-KAPPL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U_26197 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_U_26197 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_U_26197 INTO WA_U_26197.


*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 CUNIT, internal->external for field KNRME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_U_26197-KNRME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_26197-KNRME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field KNREZ
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_U_26197-KNREZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_26197-KNREZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit KOTAB, internal->external for field KOTABNR
CALL FUNCTION 'CONVERSION_EXIT_KOTAB_OUTPUT'
  EXPORTING
    input =                      WA_U_26197-KOTABNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_26197-KOTABNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KNR_PI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_26197-KNR_PI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_26197-KNR_PI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KNR_AG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_26197-KNR_AG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_26197-KNR_AG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KNR_SQ
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_26197-KNR_SQ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_26197-KNR_SQ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KNR_AK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_26197-KNR_AK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_26197-KNR_AK.
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_U_26197_STR, 
MANDT TYPE STRING,
KNUMH TYPE STRING,
KNRMM TYPE STRING,
KNRNM TYPE STRING,
KNRME TYPE STRING,
KNRZM TYPE STRING,
KNREZ TYPE STRING,
KNRRR TYPE STRING,
KNRDD TYPE STRING,
KOTABNR TYPE STRING,
KAPPL TYPE STRING,
KSCHL TYPE STRING,
LSTANR TYPE STRING,
KNR_PI TYPE STRING,
KNR_AG TYPE STRING,
KNR_SQ TYPE STRING,
KNR_AK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U_26197_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_U_26197_STR-MANDT sy-vline 
WA_U_26197_STR-KNUMH sy-vline 
WA_U_26197_STR-KNRMM sy-vline 
WA_U_26197_STR-KNRNM sy-vline 
WA_U_26197_STR-KNRME sy-vline 
WA_U_26197_STR-KNRZM sy-vline 
WA_U_26197_STR-KNREZ sy-vline 
WA_U_26197_STR-KNRRR sy-vline 
WA_U_26197_STR-KNRDD sy-vline 
WA_U_26197_STR-KOTABNR sy-vline 
WA_U_26197_STR-KAPPL sy-vline 
WA_U_26197_STR-KSCHL sy-vline 
WA_U_26197_STR-LSTANR sy-vline 
WA_U_26197_STR-KNR_PI sy-vline 
WA_U_26197_STR-KNR_AG sy-vline 
WA_U_26197_STR-KNR_SQ sy-vline 
WA_U_26197_STR-KNR_AK sy-vline      INTO ld_text SEPARATED BY SPACE.

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