ABAP Select data from SAP table UPOS_MIG_UOM_RTYPE_CH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UPOS_MIG_UOM_RTYPE_CH
*  INTO TABLE @DATA(IT_UPOS_MIG_UOM_RTYPE_CH2).
*--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_UPOS_MIG_UOM_RTYPE_CH INDEX 1 INTO DATA(WA_UPOS_MIG_UOM_RTYPE_CH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UPOS_MIG_UOM_RTYPE_CH>-RETYP = 1.
<UPOS_MIG_UOM_RTYPE_CH>-UOMGR = 1.
<UPOS_MIG_UOM_RTYPE_CH>-MEINS = 1.
<UPOS_MIG_UOM_RTYPE_CH>-XUOMC = 1.
<UPOS_MIG_UOM_RTYPE_CH>-XUOMR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UPOS_MIG_UOM_RTYPE_CH-XNEGA, sy-vline,
  WA_UPOS_MIG_UOM_RTYPE_CH-RDFMT, sy-vline,
  WA_UPOS_MIG_UOM_RTYPE_CH-RDLEN, sy-vline,
  WA_UPOS_MIG_UOM_RTYPE_CH-RDDEC, sy-vline,
  WA_UPOS_MIG_UOM_RTYPE_CH-XRNDG, sy-vline,
  WA_UPOS_MIG_UOM_RTYPE_CH-RFACT_RT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UPOS_MIG_UOM_RTYPE_CH 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_UPOS_MIG_UOM_RTYPE_CH 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_UPOS_MIG_UOM_RTYPE_CH INTO WA_UPOS_MIG_UOM_RTYPE_CH.


*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 MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_UPOS_MIG_UOM_RTYPE_CH-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_UPOS_MIG_UOM_RTYPE_CH-MEINS.
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_UPOS_MIG_UOM_RTYPE_CH_STR, 
RETYP TYPE STRING,
UOMGR TYPE STRING,
MEINS TYPE STRING,
XUOMC TYPE STRING,
XUOMR TYPE STRING,
XNEGA TYPE STRING,
RDFMT TYPE STRING,
RDLEN TYPE STRING,
RDDEC TYPE STRING,
XRNDG TYPE STRING,
RFACT_RT TYPE STRING,
XVDEF TYPE STRING,
VLDEF_F TYPE STRING,
VLDEF_C TYPE STRING,
VLDEF_D TYPE STRING,
VLDEF_T TYPE STRING,
XVWRN TYPE STRING,
VLMIN_W TYPE STRING,
VLMAX_W TYPE STRING,
XVERR TYPE STRING,
VLMIN_E TYPE STRING,
VLMAX_E TYPE STRING,
TABNM TYPE STRING,
FLDNM TYPE STRING,
DOMNM TYPE STRING,
SHELP TYPE STRING,
SPARM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UPOS_MIG_UOM_RTYPE_CH_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_UPOS_MIG_UOM_RTYPE_CH_STR-RETYP sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-UOMGR sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-MEINS sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-XUOMC sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-XUOMR sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-XNEGA sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-RDFMT sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-RDLEN sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-RDDEC sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-XRNDG sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-RFACT_RT sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-XVDEF sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-VLDEF_F sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-VLDEF_C sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-VLDEF_D sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-VLDEF_T sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-XVWRN sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-VLMIN_W sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-VLMAX_W sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-XVERR sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-VLMIN_E sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-VLMAX_E sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-TABNM sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-FLDNM sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-DOMNM sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-SHELP sy-vline 
WA_UPOS_MIG_UOM_RTYPE_CH_STR-SPARM sy-vline      INTO ld_text SEPARATED BY SPACE.

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