ABAP Select data from SAP table USINETMIG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM USINETMIG
*  INTO TABLE @DATA(IT_USINETMIG2).
*--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_USINETMIG INDEX 1 INTO DATA(WA_USINETMIG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<USINETMIG>-MANDANT = 1.
<USINETMIG>-OBJTYPE = 1.
<USINETMIG>-OBJID = 1.
<USINETMIG>-PASSWORD = 1.
<USINETMIG>-CODEVERS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_USINETMIG-SERVICE, sy-vline,
  WA_USINETMIG-STATE, sy-vline,
  WA_USINETMIG-UIDDATE, sy-vline,
  WA_USINETMIG-VALIDTO, sy-vline,
  WA_USINETMIG-LCNT, sy-vline,
  WA_USINETMIG-LDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_USINETMIG 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_USINETMIG 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_USINETMIG INTO WA_USINETMIG.


*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 OBJID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_USINETMIG-OBJID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_USINETMIG-OBJID.
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_USINETMIG_STR, 
MANDANT TYPE STRING,
OBJTYPE TYPE STRING,
OBJID TYPE STRING,
PASSWORD TYPE STRING,
CODEVERS TYPE STRING,
SERVICE TYPE STRING,
STATE TYPE STRING,
UIDDATE TYPE STRING,
VALIDTO TYPE STRING,
LCNT TYPE STRING,
LDATE TYPE STRING,
LTIME TYPE STRING,
UPDPASS TYPE STRING,
NEW_USERID TYPE STRING,
NEW_ALIAS TYPE STRING,
NEW_PWD TYPE STRING,
MIG_FAILED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_USINETMIG_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_USINETMIG_STR-MANDANT sy-vline 
WA_USINETMIG_STR-OBJTYPE sy-vline 
WA_USINETMIG_STR-OBJID sy-vline 
WA_USINETMIG_STR-PASSWORD sy-vline 
WA_USINETMIG_STR-CODEVERS sy-vline 
WA_USINETMIG_STR-SERVICE sy-vline 
WA_USINETMIG_STR-STATE sy-vline 
WA_USINETMIG_STR-UIDDATE sy-vline 
WA_USINETMIG_STR-VALIDTO sy-vline 
WA_USINETMIG_STR-LCNT sy-vline 
WA_USINETMIG_STR-LDATE sy-vline 
WA_USINETMIG_STR-LTIME sy-vline 
WA_USINETMIG_STR-UPDPASS sy-vline 
WA_USINETMIG_STR-NEW_USERID sy-vline 
WA_USINETMIG_STR-NEW_ALIAS sy-vline 
WA_USINETMIG_STR-NEW_PWD sy-vline 
WA_USINETMIG_STR-MIG_FAILED sy-vline      INTO ld_text SEPARATED BY SPACE.

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