ABAP Select data from SAP table DMC_UPG_COMP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DMC_UPG_COMP
*  INTO TABLE @DATA(IT_DMC_UPG_COMP2).
*--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_DMC_UPG_COMP INDEX 1 INTO DATA(WA_DMC_UPG_COMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DMC_UPG_COMP>-DLVUNIT = 1.
<DMC_UPG_COMP>-PLANREL = 1.
<DMC_UPG_COMP>-QSYS = 1.
<DMC_UPG_COMP>-RELEASED = 1.
<DMC_UPG_COMP>-RELNAM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DMC_UPG_COMP-RELDAT, sy-vline,
  WA_DMC_UPG_COMP-CRNAM, sy-vline,
  WA_DMC_UPG_COMP-CRDAT, sy-vline,
  WA_DMC_UPG_COMP-CHNAM, sy-vline,
  WA_DMC_UPG_COMP-CHDAT, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_DMC_UPG_COMP 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_DMC_UPG_COMP 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_DMC_UPG_COMP INTO WA_DMC_UPG_COMP.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_DMC_UPG_COMP_STR, 
DLVUNIT TYPE STRING,
PLANREL TYPE STRING,
QSYS TYPE STRING,
RELEASED TYPE STRING,
RELNAM TYPE STRING,
RELDAT TYPE STRING,
CRNAM TYPE STRING,
CRDAT TYPE STRING,
CHNAM TYPE STRING,
CHDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DMC_UPG_COMP_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_DMC_UPG_COMP_STR-DLVUNIT sy-vline 
WA_DMC_UPG_COMP_STR-PLANREL sy-vline 
WA_DMC_UPG_COMP_STR-QSYS sy-vline 
WA_DMC_UPG_COMP_STR-RELEASED sy-vline 
WA_DMC_UPG_COMP_STR-RELNAM sy-vline 
WA_DMC_UPG_COMP_STR-RELDAT sy-vline 
WA_DMC_UPG_COMP_STR-CRNAM sy-vline 
WA_DMC_UPG_COMP_STR-CRDAT sy-vline 
WA_DMC_UPG_COMP_STR-CHNAM sy-vline 
WA_DMC_UPG_COMP_STR-CHDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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