ABAP Select data from SAP table CMAINTORDCOMPTP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMAINTORDCOMPTP
*  INTO TABLE @DATA(IT_CMAINTORDCOMPTP2).
*--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_CMAINTORDCOMPTP INDEX 1 INTO DATA(WA_CMAINTORDCOMPTP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMAINTORDCOMPTP>-MANDT = 1.
<CMAINTORDCOMPTP>-MAINTENANCEORDERCOMPONENT = 1.
<CMAINTORDCOMPTP>-MAINTENANCEORDEROPERATION = 1.
<CMAINTORDCOMPTP>-MAINTENANCEORDER = 1.
<CMAINTORDCOMPTP>-MAINTORDERCOMPONENTFOREDIT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMAINTORDCOMPTP-RESERVATION, sy-vline,
  WA_CMAINTORDCOMPTP-RESERVATIONITEM, sy-vline,
  WA_CMAINTORDCOMPTP-RESERVATIONTYPE, sy-vline,
  WA_CMAINTORDCOMPTP-MATERIAL, sy-vline,
  WA_CMAINTORDCOMPTP-COMPONENTDESCRIPTION, sy-vline,
  WA_CMAINTORDCOMPTP-REQUIREMENTQUANTITYINBASEUNIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMAINTORDCOMPTP 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_CMAINTORDCOMPTP 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_CMAINTORDCOMPTP INTO WA_CMAINTORDCOMPTP.


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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field SUPPLIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMAINTORDCOMPTP-SUPPLIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMAINTORDCOMPTP-SUPPLIER.
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_CMAINTORDCOMPTP_STR, 
MANDT TYPE STRING,
MAINTENANCEORDERCOMPONENT TYPE STRING,
MAINTENANCEORDEROPERATION TYPE STRING,
MAINTENANCEORDER TYPE STRING,
MAINTORDERCOMPONENTFOREDIT TYPE STRING,
RESERVATION TYPE STRING,
RESERVATIONITEM TYPE STRING,
RESERVATIONTYPE TYPE STRING,
MATERIAL TYPE STRING,
COMPONENTDESCRIPTION TYPE STRING,
REQUIREMENTQUANTITYINBASEUNIT TYPE STRING,
BASEUNIT TYPE STRING,
PLANT TYPE STRING,
STORAGELOCATION TYPE STRING,
MAINTORDERROUTINGNUMBER TYPE STRING,
MAINTORDEROPERATIONCOUNTER TYPE STRING,
QUANTITYWITHDRAWNINBASEUNIT TYPE STRING,
MATERIALTHUMBNAILMIMETYPE TYPE STRING,
MATERIALHASTHUMBNAIL TYPE STRING,
SUPPLIER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMAINTORDCOMPTP_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_CMAINTORDCOMPTP_STR-MANDT sy-vline 
WA_CMAINTORDCOMPTP_STR-MAINTENANCEORDERCOMPONENT sy-vline 
WA_CMAINTORDCOMPTP_STR-MAINTENANCEORDEROPERATION sy-vline 
WA_CMAINTORDCOMPTP_STR-MAINTENANCEORDER sy-vline 
WA_CMAINTORDCOMPTP_STR-MAINTORDERCOMPONENTFOREDIT sy-vline 
WA_CMAINTORDCOMPTP_STR-RESERVATION sy-vline 
WA_CMAINTORDCOMPTP_STR-RESERVATIONITEM sy-vline 
WA_CMAINTORDCOMPTP_STR-RESERVATIONTYPE sy-vline 
WA_CMAINTORDCOMPTP_STR-MATERIAL sy-vline 
WA_CMAINTORDCOMPTP_STR-COMPONENTDESCRIPTION sy-vline 
WA_CMAINTORDCOMPTP_STR-REQUIREMENTQUANTITYINBASEUNIT sy-vline 
WA_CMAINTORDCOMPTP_STR-BASEUNIT sy-vline 
WA_CMAINTORDCOMPTP_STR-PLANT sy-vline 
WA_CMAINTORDCOMPTP_STR-STORAGELOCATION sy-vline 
WA_CMAINTORDCOMPTP_STR-MAINTORDERROUTINGNUMBER sy-vline 
WA_CMAINTORDCOMPTP_STR-MAINTORDEROPERATIONCOUNTER sy-vline 
WA_CMAINTORDCOMPTP_STR-QUANTITYWITHDRAWNINBASEUNIT sy-vline 
WA_CMAINTORDCOMPTP_STR-MATERIALTHUMBNAILMIMETYPE sy-vline 
WA_CMAINTORDCOMPTP_STR-MATERIALHASTHUMBNAIL sy-vline 
WA_CMAINTORDCOMPTP_STR-SUPPLIER sy-vline      INTO ld_text SEPARATED BY SPACE.

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