ABAP Select data from SAP table U_17242 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP U_17242 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_17242. 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_17242 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_17242 TYPE STANDARD TABLE OF U_17242,
      WA_U_17242 TYPE U_17242,
      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_17242> TYPE U_17242.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U_17242.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U_17242
  INTO TABLE IT_U_17242.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U_17242
*  INTO TABLE @DATA(IT_U_172422).
*--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_17242 INDEX 1 INTO DATA(WA_U_172422).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U_17242 ASSIGNING <U_17242>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U_17242>-MANDT = 1.
<U_17242>-PERNR = 1.
<U_17242>-SUBTY = 1.
<U_17242>-OBJPS = 1.
<U_17242>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_U_17242 INTO WA_U_17242.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U_17242-ENDDA, sy-vline,
  WA_U_17242-BEGDA, sy-vline,
  WA_U_17242-SEQNR, sy-vline,
  WA_U_17242-AEDTM, sy-vline,
  WA_U_17242-UNAME, sy-vline,
  WA_U_17242-PREAS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U_17242 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_17242 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_17242 INTO WA_U_17242.


*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 GJAHR, internal->external for field TMJHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_U_17242-TMJHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_17242-TMJHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MNJHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_U_17242-MNJHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_17242-MNJHR.
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_17242_STR, 
MANDT TYPE STRING,
PERNR TYPE STRING,
SUBTY TYPE STRING,
OBJPS TYPE STRING,
SPRPS TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
SEQNR TYPE STRING,
AEDTM TYPE STRING,
UNAME TYPE STRING,
PREAS TYPE STRING,
TMART TYPE STRING,
TERMN TYPE STRING,
MNDAT TYPE STRING,
BVMRK TYPE STRING,
TMJHR TYPE STRING,
TMMON TYPE STRING,
TMTAG TYPE STRING,
MNJHR TYPE STRING,
MNMON TYPE STRING,
MNTAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U_17242_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_17242_STR-MANDT sy-vline 
WA_U_17242_STR-PERNR sy-vline 
WA_U_17242_STR-SUBTY sy-vline 
WA_U_17242_STR-OBJPS sy-vline 
WA_U_17242_STR-SPRPS sy-vline 
WA_U_17242_STR-ENDDA sy-vline 
WA_U_17242_STR-BEGDA sy-vline 
WA_U_17242_STR-SEQNR sy-vline 
WA_U_17242_STR-AEDTM sy-vline 
WA_U_17242_STR-UNAME sy-vline 
WA_U_17242_STR-PREAS sy-vline 
WA_U_17242_STR-TMART sy-vline 
WA_U_17242_STR-TERMN sy-vline 
WA_U_17242_STR-MNDAT sy-vline 
WA_U_17242_STR-BVMRK sy-vline 
WA_U_17242_STR-TMJHR sy-vline 
WA_U_17242_STR-TMMON sy-vline 
WA_U_17242_STR-TMTAG sy-vline 
WA_U_17242_STR-MNJHR sy-vline 
WA_U_17242_STR-MNMON sy-vline 
WA_U_17242_STR-MNTAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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