ABAP Select data from SAP table U_30079 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP U_30079 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_30079. 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_30079 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_30079 TYPE STANDARD TABLE OF U_30079,
      WA_U_30079 TYPE U_30079,
      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_30079> TYPE U_30079.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U_30079.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U_30079
  INTO TABLE IT_U_30079.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U_30079
*  INTO TABLE @DATA(IT_U_300792).
*--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_30079 INDEX 1 INTO DATA(WA_U_300792).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U_30079 ASSIGNING <U_30079>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U_30079>-MANDT = 1.
<U_30079>-AUSZBELEG = 1.
<U_30079>-VERTRAG = 1.
<U_30079>-ANLAGE = 1.
<U_30079>-VSTELLE = 1.

ENDLOOP.

LOOP AT IT_U_30079 INTO WA_U_30079.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U_30079-AUSZDAT, sy-vline,
  WA_U_30079-STORAUSZ, sy-vline,
  WA_U_30079-OHNEEINZ, sy-vline,
  WA_U_30079-ERDAT, sy-vline,
  WA_U_30079-ERNAM, sy-vline,
  WA_U_30079-AEDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U_30079 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_30079 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_30079 INTO WA_U_30079.


*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 AUSZBELEG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_30079-AUSZBELEG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_30079-AUSZBELEG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERTRAG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_30079-VERTRAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_30079-VERTRAG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLAGE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_30079-ANLAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_30079-ANLAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VSTELLE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_30079-VSTELLE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_30079-VSTELLE.
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_30079_STR, 
MANDT TYPE STRING,
AUSZBELEG TYPE STRING,
VERTRAG TYPE STRING,
ANLAGE TYPE STRING,
VSTELLE TYPE STRING,
AUSZDAT TYPE STRING,
STORAUSZ TYPE STRING,
OHNEEINZ TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
BEGRU TYPE STRING,
LOEVM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U_30079_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_30079_STR-MANDT sy-vline 
WA_U_30079_STR-AUSZBELEG sy-vline 
WA_U_30079_STR-VERTRAG sy-vline 
WA_U_30079_STR-ANLAGE sy-vline 
WA_U_30079_STR-VSTELLE sy-vline 
WA_U_30079_STR-AUSZDAT sy-vline 
WA_U_30079_STR-STORAUSZ sy-vline 
WA_U_30079_STR-OHNEEINZ sy-vline 
WA_U_30079_STR-ERDAT sy-vline 
WA_U_30079_STR-ERNAM sy-vline 
WA_U_30079_STR-AEDAT sy-vline 
WA_U_30079_STR-AENAM sy-vline 
WA_U_30079_STR-BEGRU sy-vline 
WA_U_30079_STR-LOEVM sy-vline      INTO ld_text SEPARATED BY SPACE.

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