ABAP Select data from SAP table CMTORDCOMPPURREQ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMTORDCOMPPURREQ
*  INTO TABLE @DATA(IT_CMTORDCOMPPURREQ2).
*--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_CMTORDCOMPPURREQ INDEX 1 INTO DATA(WA_CMTORDCOMPPURREQ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMTORDCOMPPURREQ>-MANDT = 1.
<CMTORDCOMPPURREQ>-PURCHASEREQUISITION = 1.
<CMTORDCOMPPURREQ>-PURCHASEREQUISITIONITEM = 1.
<CMTORDCOMPPURREQ>-MAINTENANCEORDER = 1.
<CMTORDCOMPPURREQ>-MAINTORDERROUTINGNUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMTORDCOMPPURREQ-MAINTORDEROPERATIONCOUNTER, sy-vline,
  WA_CMTORDCOMPPURREQ-MAINTENANCEORDEROPERATION, sy-vline,
  WA_CMTORDCOMPPURREQ-MAINTENANCEORDERSUBOPERATION, sy-vline,
  WA_CMTORDCOMPPURREQ-OPERATIONDESCRIPTION, sy-vline,
  WA_CMTORDCOMPPURREQ-RESERVATION, sy-vline,
  WA_CMTORDCOMPPURREQ-RESERVATIONITEM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMTORDCOMPPURREQ 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_CMTORDCOMPPURREQ 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_CMTORDCOMPPURREQ INTO WA_CMTORDCOMPPURREQ.


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

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

*Conversion exit NUMCV, internal->external for field MAINTENANCEORDERSUBOPERATION
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_CMTORDCOMPPURREQ-MAINTENANCEORDERSUBOPERATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMTORDCOMPPURREQ-MAINTENANCEORDERSUBOPERATION.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field BASEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CMTORDCOMPPURREQ-BASEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMTORDCOMPPURREQ-BASEUNIT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field PREFERREDSUPPLIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMTORDCOMPPURREQ-PREFERREDSUPPLIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMTORDCOMPPURREQ-PREFERREDSUPPLIER.
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_CMTORDCOMPPURREQ_STR, 
MANDT TYPE STRING,
PURCHASEREQUISITION TYPE STRING,
PURCHASEREQUISITIONITEM TYPE STRING,
MAINTENANCEORDER TYPE STRING,
MAINTORDERROUTINGNUMBER TYPE STRING,
MAINTORDEROPERATIONCOUNTER TYPE STRING,
MAINTENANCEORDEROPERATION TYPE STRING,
MAINTENANCEORDERSUBOPERATION TYPE STRING,
OPERATIONDESCRIPTION TYPE STRING,
RESERVATION TYPE STRING,
RESERVATIONITEM TYPE STRING,
REFERENCEDATE TYPE STRING,
MAINTORDBASICSTARTDATE TYPE STRING,
OPERLSTSCHEDLDEXECSTRTDTE TYPE STRING,
REQUIREMENTDATE TYPE STRING,
MAINTPRIORITY TYPE STRING,
MAINTENANCEORDERTYPE TYPE STRING,
MAINTPRIORITYDESC TYPE STRING,
MAINTENANCEORDERDESC TYPE STRING,
MAINTENANCEREVISION TYPE STRING,
MAINTENANCEPLANNERGROUP TYPE STRING,
MAINTENANCEPLANNINGPLANT TYPE STRING,
MAINTENANCEPLANT TYPE STRING,
MAINWORKCENTER TYPE STRING,
MAINWORKCENTERPLANT TYPE STRING,
PURCHASEORDER TYPE STRING,
PURCHASEORDERITEM TYPE STRING,
MATERIAL TYPE STRING,
MATERIALNAME TYPE STRING,
MATERIALTHUMBNAILURL TYPE STRING,
PURREQNRELEASESTATUS TYPE STRING,
REQUESTEDQUANTITY TYPE STRING,
BASEUNIT TYPE STRING,
SUPPLIER TYPE STRING,
SUPPLIERNAME TYPE STRING,
PREFERREDSUPPLIER TYPE STRING,
PREFERREDSUPPLIERNAME TYPE STRING,
ITEMCOUNTER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMTORDCOMPPURREQ_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_CMTORDCOMPPURREQ_STR-MANDT sy-vline 
WA_CMTORDCOMPPURREQ_STR-PURCHASEREQUISITION sy-vline 
WA_CMTORDCOMPPURREQ_STR-PURCHASEREQUISITIONITEM sy-vline 
WA_CMTORDCOMPPURREQ_STR-MAINTENANCEORDER sy-vline 
WA_CMTORDCOMPPURREQ_STR-MAINTORDERROUTINGNUMBER sy-vline 
WA_CMTORDCOMPPURREQ_STR-MAINTORDEROPERATIONCOUNTER sy-vline 
WA_CMTORDCOMPPURREQ_STR-MAINTENANCEORDEROPERATION sy-vline 
WA_CMTORDCOMPPURREQ_STR-MAINTENANCEORDERSUBOPERATION sy-vline 
WA_CMTORDCOMPPURREQ_STR-OPERATIONDESCRIPTION sy-vline 
WA_CMTORDCOMPPURREQ_STR-RESERVATION sy-vline 
WA_CMTORDCOMPPURREQ_STR-RESERVATIONITEM sy-vline 
WA_CMTORDCOMPPURREQ_STR-REFERENCEDATE sy-vline 
WA_CMTORDCOMPPURREQ_STR-MAINTORDBASICSTARTDATE sy-vline 
WA_CMTORDCOMPPURREQ_STR-OPERLSTSCHEDLDEXECSTRTDTE sy-vline 
WA_CMTORDCOMPPURREQ_STR-REQUIREMENTDATE sy-vline 
WA_CMTORDCOMPPURREQ_STR-MAINTPRIORITY sy-vline 
WA_CMTORDCOMPPURREQ_STR-MAINTENANCEORDERTYPE sy-vline 
WA_CMTORDCOMPPURREQ_STR-MAINTPRIORITYDESC sy-vline 
WA_CMTORDCOMPPURREQ_STR-MAINTENANCEORDERDESC sy-vline 
WA_CMTORDCOMPPURREQ_STR-MAINTENANCEREVISION sy-vline 
WA_CMTORDCOMPPURREQ_STR-MAINTENANCEPLANNERGROUP sy-vline 
WA_CMTORDCOMPPURREQ_STR-MAINTENANCEPLANNINGPLANT sy-vline 
WA_CMTORDCOMPPURREQ_STR-MAINTENANCEPLANT sy-vline 
WA_CMTORDCOMPPURREQ_STR-MAINWORKCENTER sy-vline 
WA_CMTORDCOMPPURREQ_STR-MAINWORKCENTERPLANT sy-vline 
WA_CMTORDCOMPPURREQ_STR-PURCHASEORDER sy-vline 
WA_CMTORDCOMPPURREQ_STR-PURCHASEORDERITEM sy-vline 
WA_CMTORDCOMPPURREQ_STR-MATERIAL sy-vline 
WA_CMTORDCOMPPURREQ_STR-MATERIALNAME sy-vline 
WA_CMTORDCOMPPURREQ_STR-MATERIALTHUMBNAILURL sy-vline 
WA_CMTORDCOMPPURREQ_STR-PURREQNRELEASESTATUS sy-vline 
WA_CMTORDCOMPPURREQ_STR-REQUESTEDQUANTITY sy-vline 
WA_CMTORDCOMPPURREQ_STR-BASEUNIT sy-vline 
WA_CMTORDCOMPPURREQ_STR-SUPPLIER sy-vline 
WA_CMTORDCOMPPURREQ_STR-SUPPLIERNAME sy-vline 
WA_CMTORDCOMPPURREQ_STR-PREFERREDSUPPLIER sy-vline 
WA_CMTORDCOMPPURREQ_STR-PREFERREDSUPPLIERNAME sy-vline 
WA_CMTORDCOMPPURREQ_STR-ITEMCOUNTER sy-vline      INTO ld_text SEPARATED BY SPACE.

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