ABAP Select data from SAP table CPOMAINTVHOAITM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CPOMAINTVHOAITM
*  INTO TABLE @DATA(IT_CPOMAINTVHOAITM2).
*--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_CPOMAINTVHOAITM INDEX 1 INTO DATA(WA_CPOMAINTVHOAITM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CPOMAINTVHOAITM>-MANDT = 1.
<CPOMAINTVHOAITM>-PURCHASINGDOCUMENT = 1.
<CPOMAINTVHOAITM>-PURCHASINGDOCUMENTITEM = 1.
<CPOMAINTVHOAITM>-PURCHASINGDOCUMENTCATEGORY = 1.
<CPOMAINTVHOAITM>-SUPPLIER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CPOMAINTVHOAITM-SUPPLIERNAME, sy-vline,
  WA_CPOMAINTVHOAITM-CREATIONDATE, sy-vline,
  WA_CPOMAINTVHOAITM-VALIDITYSTARTDATE, sy-vline,
  WA_CPOMAINTVHOAITM-VALIDITYENDDATE, sy-vline,
  WA_CPOMAINTVHOAITM-MATERIAL, sy-vline,
  WA_CPOMAINTVHOAITM-PLANT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CPOMAINTVHOAITM 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_CPOMAINTVHOAITM 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_CPOMAINTVHOAITM INTO WA_CPOMAINTVHOAITM.


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

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

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CPOMAINTVHOAITM-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPOMAINTVHOAITM-MATERIAL.
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_CPOMAINTVHOAITM_STR, 
MANDT TYPE STRING,
PURCHASINGDOCUMENT TYPE STRING,
PURCHASINGDOCUMENTITEM TYPE STRING,
PURCHASINGDOCUMENTCATEGORY TYPE STRING,
SUPPLIER TYPE STRING,
SUPPLIERNAME TYPE STRING,
CREATIONDATE TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
MATERIAL TYPE STRING,
PLANT TYPE STRING,
PLANTNAME TYPE STRING,
PURCHASINGDOCUMENTITEMTEXT TYPE STRING,
PURCHASINGDOCUMENTTYPE TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGGROUP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CPOMAINTVHOAITM_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_CPOMAINTVHOAITM_STR-MANDT sy-vline 
WA_CPOMAINTVHOAITM_STR-PURCHASINGDOCUMENT sy-vline 
WA_CPOMAINTVHOAITM_STR-PURCHASINGDOCUMENTITEM sy-vline 
WA_CPOMAINTVHOAITM_STR-PURCHASINGDOCUMENTCATEGORY sy-vline 
WA_CPOMAINTVHOAITM_STR-SUPPLIER sy-vline 
WA_CPOMAINTVHOAITM_STR-SUPPLIERNAME sy-vline 
WA_CPOMAINTVHOAITM_STR-CREATIONDATE sy-vline 
WA_CPOMAINTVHOAITM_STR-VALIDITYSTARTDATE sy-vline 
WA_CPOMAINTVHOAITM_STR-VALIDITYENDDATE sy-vline 
WA_CPOMAINTVHOAITM_STR-MATERIAL sy-vline 
WA_CPOMAINTVHOAITM_STR-PLANT sy-vline 
WA_CPOMAINTVHOAITM_STR-PLANTNAME sy-vline 
WA_CPOMAINTVHOAITM_STR-PURCHASINGDOCUMENTITEMTEXT sy-vline 
WA_CPOMAINTVHOAITM_STR-PURCHASINGDOCUMENTTYPE sy-vline 
WA_CPOMAINTVHOAITM_STR-PURCHASINGORGANIZATION sy-vline 
WA_CPOMAINTVHOAITM_STR-PURCHASINGGROUP sy-vline      INTO ld_text SEPARATED BY SPACE.

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