ABAP Select data from SAP table OIUME_CHANGE_DOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIUME_CHANGE_DOC
*  INTO TABLE @DATA(IT_OIUME_CHANGE_DOC2).
*--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_OIUME_CHANGE_DOC INDEX 1 INTO DATA(WA_OIUME_CHANGE_DOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIUME_CHANGE_DOC>-SRC_DOCNR = 1.
<OIUME_CHANGE_DOC>-UOMGR = 1.
<OIUME_CHANGE_DOC>-DOCNR = 1.
<OIUME_CHANGE_DOC>-SRC_DOCYR = 1.
<OIUME_CHANGE_DOC>-UMRSL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIUME_CHANGE_DOC-DOCYR, sy-vline,
  WA_OIUME_CHANGE_DOC-METYP, sy-vline,
  WA_OIUME_CHANGE_DOC-MTTXT, sy-vline,
  WA_OIUME_CHANGE_DOC-MEAPD, sy-vline,
  WA_OIUME_CHANGE_DOC-UDATE, sy-vline,
  WA_OIUME_CHANGE_DOC-UTIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIUME_CHANGE_DOC 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_OIUME_CHANGE_DOC 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_OIUME_CHANGE_DOC INTO WA_OIUME_CHANGE_DOC.


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

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

*Conversion exit GJAHR, internal->external for field SRC_DOCYR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_OIUME_CHANGE_DOC-SRC_DOCYR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIUME_CHANGE_DOC-SRC_DOCYR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field DOCYR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_OIUME_CHANGE_DOC-DOCYR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIUME_CHANGE_DOC-DOCYR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field OLD_RUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIUME_CHANGE_DOC-OLD_RUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIUME_CHANGE_DOC-OLD_RUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field NEW_RUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIUME_CHANGE_DOC-NEW_RUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIUME_CHANGE_DOC-NEW_RUNIT.
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_OIUME_CHANGE_DOC_STR, 
SRC_DOCNR TYPE STRING,
UOMGR TYPE STRING,
DOCNR TYPE STRING,
SRC_DOCYR TYPE STRING,
UMRSL TYPE STRING,
DOCYR TYPE STRING,
METYP TYPE STRING,
MTTXT TYPE STRING,
MEAPD TYPE STRING,
UDATE TYPE STRING,
UTIME TYPE STRING,
USERNAME TYPE STRING,
CHNGIND TYPE STRING,
MRTXS TYPE STRING,
OLD_READING TYPE STRING,
OLD_RUNIT TYPE STRING,
OLD_VAL_STAT TYPE STRING,
NEW_READING TYPE STRING,
NEW_RUNIT TYPE STRING,
NEW_VAL_STAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIUME_CHANGE_DOC_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_OIUME_CHANGE_DOC_STR-SRC_DOCNR sy-vline 
WA_OIUME_CHANGE_DOC_STR-UOMGR sy-vline 
WA_OIUME_CHANGE_DOC_STR-DOCNR sy-vline 
WA_OIUME_CHANGE_DOC_STR-SRC_DOCYR sy-vline 
WA_OIUME_CHANGE_DOC_STR-UMRSL sy-vline 
WA_OIUME_CHANGE_DOC_STR-DOCYR sy-vline 
WA_OIUME_CHANGE_DOC_STR-METYP sy-vline 
WA_OIUME_CHANGE_DOC_STR-MTTXT sy-vline 
WA_OIUME_CHANGE_DOC_STR-MEAPD sy-vline 
WA_OIUME_CHANGE_DOC_STR-UDATE sy-vline 
WA_OIUME_CHANGE_DOC_STR-UTIME sy-vline 
WA_OIUME_CHANGE_DOC_STR-USERNAME sy-vline 
WA_OIUME_CHANGE_DOC_STR-CHNGIND sy-vline 
WA_OIUME_CHANGE_DOC_STR-MRTXS sy-vline 
WA_OIUME_CHANGE_DOC_STR-OLD_READING sy-vline 
WA_OIUME_CHANGE_DOC_STR-OLD_RUNIT sy-vline 
WA_OIUME_CHANGE_DOC_STR-OLD_VAL_STAT sy-vline 
WA_OIUME_CHANGE_DOC_STR-NEW_READING sy-vline 
WA_OIUME_CHANGE_DOC_STR-NEW_RUNIT sy-vline 
WA_OIUME_CHANGE_DOC_STR-NEW_VAL_STAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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