ABAP Select data from SAP table UPOS_MIG_WC_VOLUME_RAW 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_WC_VOLUME_RAW 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_WC_VOLUME_RAW. 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_WC_VOLUME_RAW 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_WC_VOLUME_RAW TYPE STANDARD TABLE OF UPOS_MIG_WC_VOLUME_RAW,
      WA_UPOS_MIG_WC_VOLUME_RAW TYPE UPOS_MIG_WC_VOLUME_RAW,
      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_WC_VOLUME_RAW> TYPE UPOS_MIG_WC_VOLUME_RAW.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UPOS_MIG_WC_VOLUME_RAW
*  INTO TABLE @DATA(IT_UPOS_MIG_WC_VOLUME_RAW2).
*--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_WC_VOLUME_RAW INDEX 1 INTO DATA(WA_UPOS_MIG_WC_VOLUME_RAW2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UPOS_MIG_WC_VOLUME_RAW-GHO_NET_OBJ_ID, sy-vline,
  WA_UPOS_MIG_WC_VOLUME_RAW-GHO_NET_OBJ_TYPE, sy-vline,
  WA_UPOS_MIG_WC_VOLUME_RAW-GHO_FREQUENCY, sy-vline,
  WA_UPOS_MIG_WC_VOLUME_RAW-MEDIUM, sy-vline,
  WA_UPOS_MIG_WC_VOLUME_RAW-GHO_RECORD_ORIGIN, sy-vline,
  WA_UPOS_MIG_WC_VOLUME_RAW-GHO_OBJ_ID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UPOS_MIG_WC_VOLUME_RAW 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_WC_VOLUME_RAW 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_WC_VOLUME_RAW INTO WA_UPOS_MIG_WC_VOLUME_RAW.


*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 MATN1, internal->external for field ALLOCATION_MAT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_UPOS_MIG_WC_VOLUME_RAW-ALLOCATION_MAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_UPOS_MIG_WC_VOLUME_RAW-ALLOCATION_MAT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_UPOS_MIG_WC_VOLUME_RAW-UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_UPOS_MIG_WC_VOLUME_RAW-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_WC_VOLUME_RAW_STR, 
GHO_NET_ID TYPE STRING,
GHO_FROM_DATE TYPE STRING,
GHO_TO_DATE TYPE STRING,
GHO_OBJ_TYPE TYPE STRING,
GHO_NODE_ID TYPE STRING,
GHO_NET_OBJ_ID TYPE STRING,
GHO_NET_OBJ_TYPE TYPE STRING,
GHO_FREQUENCY TYPE STRING,
MEDIUM TYPE STRING,
GHO_RECORD_ORIGIN TYPE STRING,
GHO_OBJ_ID TYPE STRING,
GHO_MEAS_FREQ TYPE STRING,
GHO_QTY_TYPE TYPE STRING,
GHO_QTY_TYPE_DESCR TYPE STRING,
ALLOCATION_MAT TYPE STRING,
GHO_MEAS_DATE TYPE STRING,
GHO_MEAS_TIME TYPE STRING,
BUS_KEY TYPE STRING,
ALLOC_TYPE TYPE STRING,
MEASMNT_POINT TYPE STRING,
GHO_MEAS_CAT_ID TYPE STRING,
MDC_PARAMETER TYPE STRING,
REF_NETWORK_ID TYPE STRING,
REF_NODE_ID TYPE STRING,
MDC_VALUE TYPE STRING,
UOM TYPE STRING,
ITEM TYPE STRING,
LOW TYPE STRING,
HIGH TYPE STRING,
OPERATOR TYPE STRING,
MDC_DATATYPE TYPE STRING,
MDCLEN TYPE STRING,
MDC_PARAMETER_TXT TYPE STRING,
MDC_DECIMAL TYPE STRING,
MDC_VISIBILITY TYPE STRING,
MDC_MANDATORY TYPE STRING,
MANUAL_FLAG TYPE STRING,
FCHARDESC TYPE STRING,
IS_UPDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UPOS_MIG_WC_VOLUME_RAW_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_WC_VOLUME_RAW_STR-GHO_NET_ID sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-GHO_FROM_DATE sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-GHO_TO_DATE sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-GHO_OBJ_TYPE sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-GHO_NODE_ID sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-GHO_NET_OBJ_ID sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-GHO_NET_OBJ_TYPE sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-GHO_FREQUENCY sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-MEDIUM sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-GHO_RECORD_ORIGIN sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-GHO_OBJ_ID sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-GHO_MEAS_FREQ sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-GHO_QTY_TYPE sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-GHO_QTY_TYPE_DESCR sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-ALLOCATION_MAT sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-GHO_MEAS_DATE sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-GHO_MEAS_TIME sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-BUS_KEY sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-ALLOC_TYPE sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-MEASMNT_POINT sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-GHO_MEAS_CAT_ID sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-MDC_PARAMETER sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-REF_NETWORK_ID sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-REF_NODE_ID sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-MDC_VALUE sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-UOM sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-ITEM sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-LOW sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-HIGH sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-OPERATOR sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-MDC_DATATYPE sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-MDCLEN sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-MDC_PARAMETER_TXT sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-MDC_DECIMAL sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-MDC_VISIBILITY sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-MDC_MANDATORY sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-MANUAL_FLAG sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-FCHARDESC sy-vline 
WA_UPOS_MIG_WC_VOLUME_RAW_STR-IS_UPDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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