ABAP Select data from SAP table OMC_MCDEP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OMC_MCDEP
*  INTO TABLE @DATA(IT_OMC_MCDEP2).
*--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_OMC_MCDEP INDEX 1 INTO DATA(WA_OMC_MCDEP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OMC_MCDEP>-MANDT = 1.
<OMC_MCDEP>-CUSTID = 1.
<OMC_MCDEP>-REGISTERCARD = 1.
<OMC_MCDEP>-VARIANZSCHEMA = 1.
<OMC_MCDEP>-VAL_UNIQUE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OMC_MCDEP-VAL_FIXLENGTH, sy-vline,
  WA_OMC_MCDEP-VAL_VARLENGTH, sy-vline,
  WA_OMC_MCDEP-VAL_LENGTH, sy-vline,
  WA_OMC_MCDEP-VAL_SINGLE, sy-vline,
  WA_OMC_MCDEP-VAL_MULTI, sy-vline,
  WA_OMC_MCDEP-VAL_AND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OMC_MCDEP 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_OMC_MCDEP 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_OMC_MCDEP INTO WA_OMC_MCDEP.


*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 LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OMC_MCDEP-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OMC_MCDEP-LOGSYS.
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_OMC_MCDEP_STR, 
MANDT TYPE STRING,
CUSTID TYPE STRING,
REGISTERCARD TYPE STRING,
VARIANZSCHEMA TYPE STRING,
VAL_UNIQUE TYPE STRING,
VAL_FIXLENGTH TYPE STRING,
VAL_VARLENGTH TYPE STRING,
VAL_LENGTH TYPE STRING,
VAL_SINGLE TYPE STRING,
VAL_MULTI TYPE STRING,
VAL_AND TYPE STRING,
VAL_OR TYPE STRING,
VAL_OR_KLAMMER TYPE STRING,
ATT_AND TYPE STRING,
ATT_AND_NOT TYPE STRING,
ATT_OR TYPE STRING,
ATT_OR_NOT TYPE STRING,
LOG_OP_FIRST TYPE STRING,
EDITOR_CHANGE TYPE STRING,
SAP_INCLUDE TYPE STRING,
GUI_STANDARD TYPE STRING,
GUI_TABLEVIEW TYPE STRING,
GUI_LOOP TYPE STRING,
GUI_IPPE_MULTI TYPE STRING,
AA_SORT_UP TYPE STRING,
AA_SORT_DOWN TYPE STRING,
AA_SORT_INP TYPE STRING,
VO_SORT_UP TYPE STRING,
VO_SORT_DOWN TYPE STRING,
VO_SORT_INP TYPE STRING,
ECHECK TYPE STRING,
CH_ONREQ TYPE STRING,
CH_ONREQ_T TYPE STRING,
CH_PERMANENT TYPE STRING,
CH_PERMANENT_T TYPE STRING,
CH_COND TYPE STRING,
CH_COND_T TYPE STRING,
CH_ALL_CONDS TYPE STRING,
CH_ALL_CONDS_T TYPE STRING,
CH_CONDS_EQ TYPE STRING,
CH_CONDS_EQ_T TYPE STRING,
CH_PARTS_EQ TYPE STRING,
CH_PARTS_EQ_T TYPE STRING,
SAP_DISPLAY TYPE STRING,
FORM_DYNAMIC TYPE STRING,
FORM_WIDTH TYPE STRING,
FORM_ELEMENTS TYPE STRING,
GUI_FORMULAR TYPE STRING,
GUI_HTML TYPE STRING,
PRIORITY TYPE STRING,
TKINLINE TYPE STRING,
CH_HELP TYPE STRING,
SAP_SOURCE TYPE STRING,
NO_HTML TYPE STRING,
CREADAT TYPE STRING,
CREABY TYPE STRING,
CHNGDAT TYPE STRING,
CHNGBY TYPE STRING,
LOGSYS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OMC_MCDEP_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_OMC_MCDEP_STR-MANDT sy-vline 
WA_OMC_MCDEP_STR-CUSTID sy-vline 
WA_OMC_MCDEP_STR-REGISTERCARD sy-vline 
WA_OMC_MCDEP_STR-VARIANZSCHEMA sy-vline 
WA_OMC_MCDEP_STR-VAL_UNIQUE sy-vline 
WA_OMC_MCDEP_STR-VAL_FIXLENGTH sy-vline 
WA_OMC_MCDEP_STR-VAL_VARLENGTH sy-vline 
WA_OMC_MCDEP_STR-VAL_LENGTH sy-vline 
WA_OMC_MCDEP_STR-VAL_SINGLE sy-vline 
WA_OMC_MCDEP_STR-VAL_MULTI sy-vline 
WA_OMC_MCDEP_STR-VAL_AND sy-vline 
WA_OMC_MCDEP_STR-VAL_OR sy-vline 
WA_OMC_MCDEP_STR-VAL_OR_KLAMMER sy-vline 
WA_OMC_MCDEP_STR-ATT_AND sy-vline 
WA_OMC_MCDEP_STR-ATT_AND_NOT sy-vline 
WA_OMC_MCDEP_STR-ATT_OR sy-vline 
WA_OMC_MCDEP_STR-ATT_OR_NOT sy-vline 
WA_OMC_MCDEP_STR-LOG_OP_FIRST sy-vline 
WA_OMC_MCDEP_STR-EDITOR_CHANGE sy-vline 
WA_OMC_MCDEP_STR-SAP_INCLUDE sy-vline 
WA_OMC_MCDEP_STR-GUI_STANDARD sy-vline 
WA_OMC_MCDEP_STR-GUI_TABLEVIEW sy-vline 
WA_OMC_MCDEP_STR-GUI_LOOP sy-vline 
WA_OMC_MCDEP_STR-GUI_IPPE_MULTI sy-vline 
WA_OMC_MCDEP_STR-AA_SORT_UP sy-vline 
WA_OMC_MCDEP_STR-AA_SORT_DOWN sy-vline 
WA_OMC_MCDEP_STR-AA_SORT_INP sy-vline 
WA_OMC_MCDEP_STR-VO_SORT_UP sy-vline 
WA_OMC_MCDEP_STR-VO_SORT_DOWN sy-vline 
WA_OMC_MCDEP_STR-VO_SORT_INP sy-vline 
WA_OMC_MCDEP_STR-ECHECK sy-vline 
WA_OMC_MCDEP_STR-CH_ONREQ sy-vline 
WA_OMC_MCDEP_STR-CH_ONREQ_T sy-vline 
WA_OMC_MCDEP_STR-CH_PERMANENT sy-vline 
WA_OMC_MCDEP_STR-CH_PERMANENT_T sy-vline 
WA_OMC_MCDEP_STR-CH_COND sy-vline 
WA_OMC_MCDEP_STR-CH_COND_T sy-vline 
WA_OMC_MCDEP_STR-CH_ALL_CONDS sy-vline 
WA_OMC_MCDEP_STR-CH_ALL_CONDS_T sy-vline 
WA_OMC_MCDEP_STR-CH_CONDS_EQ sy-vline 
WA_OMC_MCDEP_STR-CH_CONDS_EQ_T sy-vline 
WA_OMC_MCDEP_STR-CH_PARTS_EQ sy-vline 
WA_OMC_MCDEP_STR-CH_PARTS_EQ_T sy-vline 
WA_OMC_MCDEP_STR-SAP_DISPLAY sy-vline 
WA_OMC_MCDEP_STR-FORM_DYNAMIC sy-vline 
WA_OMC_MCDEP_STR-FORM_WIDTH sy-vline 
WA_OMC_MCDEP_STR-FORM_ELEMENTS sy-vline 
WA_OMC_MCDEP_STR-GUI_FORMULAR sy-vline 
WA_OMC_MCDEP_STR-GUI_HTML sy-vline 
WA_OMC_MCDEP_STR-PRIORITY sy-vline 
WA_OMC_MCDEP_STR-TKINLINE sy-vline 
WA_OMC_MCDEP_STR-CH_HELP sy-vline 
WA_OMC_MCDEP_STR-SAP_SOURCE sy-vline 
WA_OMC_MCDEP_STR-NO_HTML sy-vline 
WA_OMC_MCDEP_STR-CREADAT sy-vline 
WA_OMC_MCDEP_STR-CREABY sy-vline 
WA_OMC_MCDEP_STR-CHNGDAT sy-vline 
WA_OMC_MCDEP_STR-CHNGBY sy-vline 
WA_OMC_MCDEP_STR-LOGSYS sy-vline      INTO ld_text SEPARATED BY SPACE.

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