ABAP Select data from SAP table UPOS_MIG_UOM_THEORETICAL_DATA 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_THEORETICAL_DATA 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_THEORETICAL_DATA. 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_THEORETICAL_DATA 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_THEORETICAL_DATA TYPE STANDARD TABLE OF UPOS_MIG_UOM_THEORETICAL_DATA,
      WA_UPOS_MIG_UOM_THEORETICAL_DATA TYPE UPOS_MIG_UOM_THEORETICAL_DATA,
      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_THEORETICAL_DATA> TYPE UPOS_MIG_UOM_THEORETICAL_DATA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UPOS_MIG_UOM_THEORETICAL_DATA
*  INTO TABLE @DATA(IT_UPOS_MIG_UOM_THEORETICAL_DATA2).
*--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_THEORETICAL_DATA INDEX 1 INTO DATA(WA_UPOS_MIG_UOM_THEORETICAL_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UPOS_MIG_UOM_THEORETICAL_DATA>-GHO_NET_ID = 1.
<UPOS_MIG_UOM_THEORETICAL_DATA>-GHO_FROM_DATE = 1.
<UPOS_MIG_UOM_THEORETICAL_DATA>-GHO_TO_DATE = 1.
<UPOS_MIG_UOM_THEORETICAL_DATA>-GHO_OBJ_TYPE = 1.
<UPOS_MIG_UOM_THEORETICAL_DATA>-GHO_NET_OBJ_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UPOS_MIG_UOM_THEORETICAL_DATA-GHO_ALLOC_TYP, sy-vline,
  WA_UPOS_MIG_UOM_THEORETICAL_DATA-GHO_FREQUENCY, sy-vline,
  WA_UPOS_MIG_UOM_THEORETICAL_DATA-GHO_MEDIUM, sy-vline,
  WA_UPOS_MIG_UOM_THEORETICAL_DATA-GHO_VALID_FROM_DATE, sy-vline,
  WA_UPOS_MIG_UOM_THEORETICAL_DATA-GHO_VALID_FROM_TIME, sy-vline,
  WA_UPOS_MIG_UOM_THEORETICAL_DATA-BUS_KEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UPOS_MIG_UOM_THEORETICAL_DATA 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_THEORETICAL_DATA 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_THEORETICAL_DATA INTO WA_UPOS_MIG_UOM_THEORETICAL_DATA.


*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 UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_UPOS_MIG_UOM_THEORETICAL_DATA-UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_UPOS_MIG_UOM_THEORETICAL_DATA-UOM.
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_THEORETICAL_DATA_STR, 
GHO_NET_ID TYPE STRING,
GHO_FROM_DATE TYPE STRING,
GHO_TO_DATE TYPE STRING,
GHO_OBJ_TYPE TYPE STRING,
GHO_NET_OBJ_ID TYPE STRING,
GHO_ALLOC_TYP TYPE STRING,
GHO_FREQUENCY TYPE STRING,
GHO_MEDIUM TYPE STRING,
GHO_VALID_FROM_DATE TYPE STRING,
GHO_VALID_FROM_TIME TYPE STRING,
BUS_KEY TYPE STRING,
FREQUENCY_DESC TYPE STRING,
MEDIUM_DESC TYPE STRING,
GHO_NODE_ID_DESC TYPE STRING,
NON_ADJUSTABLE TYPE STRING,
VALID_TO_DATE TYPE STRING,
VALID_TO_TIME TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_TST TYPE STRING,
CHANGED_BY TYPE STRING,
CHANGED_TST TYPE STRING,
OVERRIDE_FLAG TYPE STRING,
CREATE_FLAG TYPE STRING,
OPERATION TYPE STRING,
AUTH_CREATE TYPE STRING,
AUTH_READ TYPE STRING,
AUTH_UPDATE TYPE STRING,
AUTH_DELETE TYPE STRING,
PPA_LOCK TYPE STRING,
PPA_REQUESTER_FLAG TYPE STRING,
REQUESTER TYPE STRING,
ALERT_ID TYPE STRING,
QTY_TYPE TYPE STRING,
QTY_TYPE_DESC TYPE STRING,
ADJUSTABL_THEO TYPE STRING,
UOM TYPE STRING,
QUANTITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UPOS_MIG_UOM_THEORETICAL_DATA_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_THEORETICAL_DATA_STR-GHO_NET_ID sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-GHO_FROM_DATE sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-GHO_TO_DATE sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-GHO_OBJ_TYPE sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-GHO_NET_OBJ_ID sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-GHO_ALLOC_TYP sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-GHO_FREQUENCY sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-GHO_MEDIUM sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-GHO_VALID_FROM_DATE sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-GHO_VALID_FROM_TIME sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-BUS_KEY sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-FREQUENCY_DESC sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-MEDIUM_DESC sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-GHO_NODE_ID_DESC sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-NON_ADJUSTABLE sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-VALID_TO_DATE sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-VALID_TO_TIME sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-CREATED_BY sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-CREATED_TST sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-CHANGED_BY sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-CHANGED_TST sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-OVERRIDE_FLAG sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-CREATE_FLAG sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-OPERATION sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-AUTH_CREATE sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-AUTH_READ sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-AUTH_UPDATE sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-AUTH_DELETE sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-PPA_LOCK sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-PPA_REQUESTER_FLAG sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-REQUESTER sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-ALERT_ID sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-QTY_TYPE sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-QTY_TYPE_DESC sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-ADJUSTABL_THEO sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-UOM sy-vline 
WA_UPOS_MIG_UOM_THEORETICAL_DATA_STR-QUANTITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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