ABAP Select data from SAP table CMRPSITNALRT into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CMRPSITNALRT 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 CMRPSITNALRT. 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 CMRPSITNALRT 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_CMRPSITNALRT TYPE STANDARD TABLE OF CMRPSITNALRT,
      WA_CMRPSITNALRT TYPE CMRPSITNALRT,
      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: <CMRPSITNALRT> TYPE CMRPSITNALRT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMRPSITNALRT
*  INTO TABLE @DATA(IT_CMRPSITNALRT2).
*--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_CMRPSITNALRT INDEX 1 INTO DATA(WA_CMRPSITNALRT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMRPSITNALRT>-MANDT = 1.
<CMRPSITNALRT>-MATLEXCPTNSITUATIONHANDLINGID = 1.
<CMRPSITNALRT>-MATLEXCPTNSITUATIONTYPE = 1.
<CMRPSITNALRT>-EXCEPTIONMESSAGENUMBER = 1.
<CMRPSITNALRT>-MATERIAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMRPSITNALRT-MRPAREA, sy-vline,
  WA_CMRPSITNALRT-PLANT, sy-vline,
  WA_CMRPSITNALRT-MRPCONTROLLER, sy-vline,
  WA_CMRPSITNALRT-MRPELEMENT, sy-vline,
  WA_CMRPSITNALRT-SOURCEMRPELEMENTCATEGORY, sy-vline,
  WA_CMRPSITNALRT-MRPELEMENTSCHEDULELINE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMRPSITNALRT 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_CMRPSITNALRT 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_CMRPSITNALRT INTO WA_CMRPSITNALRT.


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

*Conversion exit ALPHA, internal->external for field BUSINESSPARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMRPSITNALRT-BUSINESSPARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMRPSITNALRT-BUSINESSPARTNER.
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_CMRPSITNALRT_STR, 
MANDT TYPE STRING,
MATLEXCPTNSITUATIONHANDLINGID TYPE STRING,
MATLEXCPTNSITUATIONTYPE TYPE STRING,
EXCEPTIONMESSAGENUMBER TYPE STRING,
MATERIAL TYPE STRING,
MRPAREA TYPE STRING,
PLANT TYPE STRING,
MRPCONTROLLER TYPE STRING,
MRPELEMENT TYPE STRING,
SOURCEMRPELEMENTCATEGORY TYPE STRING,
MRPELEMENTSCHEDULELINE TYPE STRING,
MRPELEMENTITEM TYPE STRING,
EXCEPTIONMESSAGETEXT TYPE STRING,
MRPPLANNINGSEGMENT TYPE STRING,
MRPPLANNINGSEGMENTTYPE TYPE STRING,
MRPELEMENTCATEGORYNAME TYPE STRING,
BUSINESSPARTNER TYPE STRING,
MATERIALSHORTAGEDEFINITIONNAME TYPE STRING,
PMRPRESOURCENAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMRPSITNALRT_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_CMRPSITNALRT_STR-MANDT sy-vline 
WA_CMRPSITNALRT_STR-MATLEXCPTNSITUATIONHANDLINGID sy-vline 
WA_CMRPSITNALRT_STR-MATLEXCPTNSITUATIONTYPE sy-vline 
WA_CMRPSITNALRT_STR-EXCEPTIONMESSAGENUMBER sy-vline 
WA_CMRPSITNALRT_STR-MATERIAL sy-vline 
WA_CMRPSITNALRT_STR-MRPAREA sy-vline 
WA_CMRPSITNALRT_STR-PLANT sy-vline 
WA_CMRPSITNALRT_STR-MRPCONTROLLER sy-vline 
WA_CMRPSITNALRT_STR-MRPELEMENT sy-vline 
WA_CMRPSITNALRT_STR-SOURCEMRPELEMENTCATEGORY sy-vline 
WA_CMRPSITNALRT_STR-MRPELEMENTSCHEDULELINE sy-vline 
WA_CMRPSITNALRT_STR-MRPELEMENTITEM sy-vline 
WA_CMRPSITNALRT_STR-EXCEPTIONMESSAGETEXT sy-vline 
WA_CMRPSITNALRT_STR-MRPPLANNINGSEGMENT sy-vline 
WA_CMRPSITNALRT_STR-MRPPLANNINGSEGMENTTYPE sy-vline 
WA_CMRPSITNALRT_STR-MRPELEMENTCATEGORYNAME sy-vline 
WA_CMRPSITNALRT_STR-BUSINESSPARTNER sy-vline 
WA_CMRPSITNALRT_STR-MATERIALSHORTAGEDEFINITIONNAME sy-vline 
WA_CMRPSITNALRT_STR-PMRPRESOURCENAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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