ABAP Select data from SAP table CMMMATLPRCH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMMMATLPRCH
*  INTO TABLE @DATA(IT_CMMMATLPRCH2).
*--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_CMMMATLPRCH INDEX 1 INTO DATA(WA_CMMMATLPRCH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMMMATLPRCH>-MANDT = 1.
<CMMMATLPRCH>-PURCHASEORDER = 1.
<CMMMATLPRCH>-PURCHASEORDERITEM = 1.
<CMMMATLPRCH>-ACCOUNTASSIGNMENTNUMBER = 1.
<CMMMATLPRCH>-MATERIALDOCUMENTYEAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMMMATLPRCH-INVOICE, sy-vline,
  WA_CMMMATLPRCH-MATERIALDOCUMENTITEM, sy-vline,
  WA_CMMMATLPRCH-INVOICEDATE, sy-vline,
  WA_CMMMATLPRCH-CALENDARYEAR, sy-vline,
  WA_CMMMATLPRCH-CALENDARMONTH, sy-vline,
  WA_CMMMATLPRCH-CALENDARQUARTER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMMMATLPRCH 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_CMMMATLPRCH 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_CMMMATLPRCH INTO WA_CMMMATLPRCH.


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

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

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

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

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

*Conversion exit ABPSP, internal->external for field WBSELEMENT
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_CMMMATLPRCH-WBSELEMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMMMATLPRCH-WBSELEMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COSTCENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMMMATLPRCH-COSTCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMMMATLPRCH-COSTCENTER.
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_CMMMATLPRCH_STR, 
MANDT TYPE STRING,
PURCHASEORDER TYPE STRING,
PURCHASEORDERITEM TYPE STRING,
ACCOUNTASSIGNMENTNUMBER TYPE STRING,
MATERIALDOCUMENTYEAR TYPE STRING,
INVOICE TYPE STRING,
MATERIALDOCUMENTITEM TYPE STRING,
INVOICEDATE TYPE STRING,
CALENDARYEAR TYPE STRING,
CALENDARMONTH TYPE STRING,
CALENDARQUARTER TYPE STRING,
CALENDARWEEK TYPE STRING,
YEARWEEK TYPE STRING,
YEARMONTH TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGORGANIZATIONNAME TYPE STRING,
PURCHASINGGROUP TYPE STRING,
PURCHASINGGROUPNAME TYPE STRING,
COMPANYCODE TYPE STRING,
SUPPLIER TYPE STRING,
SUPPLIERNAME TYPE STRING,
SUPPLIERCOUNTRY TYPE STRING,
COUNTRYNAME TYPE STRING,
MATERIAL TYPE STRING,
MATERIALNAME TYPE STRING,
MATERIALGROUP TYPE STRING,
MATERIALGROUPNAME TYPE STRING,
PURGCATNAME TYPE STRING,
PURCHASINGCATEGORY TYPE STRING,
PLANT TYPE STRING,
PLANTNAME TYPE STRING,
WBSELEMENT TYPE STRING,
COSTCENTER TYPE STRING,
DISPLAYCURRENCY TYPE STRING,
NETPRICEAMOUNT TYPE STRING,
NUMBEROFINVOICES TYPE STRING,
PURCHASEORDERAMOUNT TYPE STRING,
INVOICEAMTINDISPLAYCURRENCY TYPE STRING,
WEIGHTEDNETPRICE TYPE STRING,
QUANTITYINBASEUNIT TYPE STRING,
AVERAGEMATERIALPRICE TYPE STRING,
WEIGHTEDMATERIALPRICE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMMMATLPRCH_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_CMMMATLPRCH_STR-MANDT sy-vline 
WA_CMMMATLPRCH_STR-PURCHASEORDER sy-vline 
WA_CMMMATLPRCH_STR-PURCHASEORDERITEM sy-vline 
WA_CMMMATLPRCH_STR-ACCOUNTASSIGNMENTNUMBER sy-vline 
WA_CMMMATLPRCH_STR-MATERIALDOCUMENTYEAR sy-vline 
WA_CMMMATLPRCH_STR-INVOICE sy-vline 
WA_CMMMATLPRCH_STR-MATERIALDOCUMENTITEM sy-vline 
WA_CMMMATLPRCH_STR-INVOICEDATE sy-vline 
WA_CMMMATLPRCH_STR-CALENDARYEAR sy-vline 
WA_CMMMATLPRCH_STR-CALENDARMONTH sy-vline 
WA_CMMMATLPRCH_STR-CALENDARQUARTER sy-vline 
WA_CMMMATLPRCH_STR-CALENDARWEEK sy-vline 
WA_CMMMATLPRCH_STR-YEARWEEK sy-vline 
WA_CMMMATLPRCH_STR-YEARMONTH sy-vline 
WA_CMMMATLPRCH_STR-PURCHASINGORGANIZATION sy-vline 
WA_CMMMATLPRCH_STR-PURCHASINGORGANIZATIONNAME sy-vline 
WA_CMMMATLPRCH_STR-PURCHASINGGROUP sy-vline 
WA_CMMMATLPRCH_STR-PURCHASINGGROUPNAME sy-vline 
WA_CMMMATLPRCH_STR-COMPANYCODE sy-vline 
WA_CMMMATLPRCH_STR-SUPPLIER sy-vline 
WA_CMMMATLPRCH_STR-SUPPLIERNAME sy-vline 
WA_CMMMATLPRCH_STR-SUPPLIERCOUNTRY sy-vline 
WA_CMMMATLPRCH_STR-COUNTRYNAME sy-vline 
WA_CMMMATLPRCH_STR-MATERIAL sy-vline 
WA_CMMMATLPRCH_STR-MATERIALNAME sy-vline 
WA_CMMMATLPRCH_STR-MATERIALGROUP sy-vline 
WA_CMMMATLPRCH_STR-MATERIALGROUPNAME sy-vline 
WA_CMMMATLPRCH_STR-PURGCATNAME sy-vline 
WA_CMMMATLPRCH_STR-PURCHASINGCATEGORY sy-vline 
WA_CMMMATLPRCH_STR-PLANT sy-vline 
WA_CMMMATLPRCH_STR-PLANTNAME sy-vline 
WA_CMMMATLPRCH_STR-WBSELEMENT sy-vline 
WA_CMMMATLPRCH_STR-COSTCENTER sy-vline 
WA_CMMMATLPRCH_STR-DISPLAYCURRENCY sy-vline 
WA_CMMMATLPRCH_STR-NETPRICEAMOUNT sy-vline 
WA_CMMMATLPRCH_STR-NUMBEROFINVOICES sy-vline 
WA_CMMMATLPRCH_STR-PURCHASEORDERAMOUNT sy-vline 
WA_CMMMATLPRCH_STR-INVOICEAMTINDISPLAYCURRENCY sy-vline 
WA_CMMMATLPRCH_STR-WEIGHTEDNETPRICE sy-vline 
WA_CMMMATLPRCH_STR-QUANTITYINBASEUNIT sy-vline 
WA_CMMMATLPRCH_STR-AVERAGEMATERIALPRICE sy-vline 
WA_CMMMATLPRCH_STR-WEIGHTEDMATERIALPRICE sy-vline      INTO ld_text SEPARATED BY SPACE.

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