ABAP Select data from SAP table OCMHOMO_ARCH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OCMHOMO_ARCH
*  INTO TABLE @DATA(IT_OCMHOMO_ARCH2).
*--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_OCMHOMO_ARCH INDEX 1 INTO DATA(WA_OCMHOMO_ARCH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OCMHOMO_ARCH>-MANDT = 1.
<OCMHOMO_ARCH>-AUFNR = 1.
<OCMHOMO_ARCH>-MATNR = 1.
<OCMHOMO_ARCH>-WERKS = 1.
<OCMHOMO_ARCH>-VBELN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OCMHOMO_ARCH-VBPOS, sy-vline,
  WA_OCMHOMO_ARCH-LTRMI, sy-vline,
  WA_OCMHOMO_ARCH-SERNR, sy-vline,
  WA_OCMHOMO_ARCH-KUNNR, sy-vline,
  WA_OCMHOMO_ARCH-SERIALNR, sy-vline,
  WA_OCMHOMO_ARCH-KFELD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OCMHOMO_ARCH 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_OCMHOMO_ARCH 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_OCMHOMO_ARCH INTO WA_OCMHOMO_ARCH.


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

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

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

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

*Conversion exit GERNR, internal->external for field SERIALNR
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_OCMHOMO_ARCH-SERIALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OCMHOMO_ARCH-SERIALNR.
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_OCMHOMO_ARCH_STR, 
MANDT TYPE STRING,
AUFNR TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
VBELN TYPE STRING,
VBPOS TYPE STRING,
LTRMI TYPE STRING,
SERNR TYPE STRING,
KUNNR TYPE STRING,
SERIALNR TYPE STRING,
KFELD TYPE STRING,
CONF_KEY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OCMHOMO_ARCH_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_OCMHOMO_ARCH_STR-MANDT sy-vline 
WA_OCMHOMO_ARCH_STR-AUFNR sy-vline 
WA_OCMHOMO_ARCH_STR-MATNR sy-vline 
WA_OCMHOMO_ARCH_STR-WERKS sy-vline 
WA_OCMHOMO_ARCH_STR-VBELN sy-vline 
WA_OCMHOMO_ARCH_STR-VBPOS sy-vline 
WA_OCMHOMO_ARCH_STR-LTRMI sy-vline 
WA_OCMHOMO_ARCH_STR-SERNR sy-vline 
WA_OCMHOMO_ARCH_STR-KUNNR sy-vline 
WA_OCMHOMO_ARCH_STR-SERIALNR sy-vline 
WA_OCMHOMO_ARCH_STR-KFELD sy-vline 
WA_OCMHOMO_ARCH_STR-CONF_KEY sy-vline      INTO ld_text SEPARATED BY SPACE.

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