ABAP Select data from SAP table MPCR_CAUSE_D into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MPCR_CAUSE_D
*  INTO TABLE @DATA(IT_MPCR_CAUSE_D2).
*--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_MPCR_CAUSE_D INDEX 1 INTO DATA(WA_MPCR_CAUSE_D2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MPCR_CAUSE_D>-MANDT = 1.
<MPCR_CAUSE_D>-MAINTENANCEITEM = 1.
<MPCR_CAUSE_D>-NMBROFMAINTCOMPLIANCEITEMS = 1.
<MPCR_CAUSE_D>-MAINTENANCECOMPLIANCEGROUPCODE = 1.
<MPCR_CAUSE_D>-MAINTENANCECOMPLIANCECODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MPCR_CAUSE_D-MAINTENANCECOMPLIANCETYPECODE, sy-vline,
  WA_MPCR_CAUSE_D-MAINTCOMPLIANCECATALOGCODE, sy-vline,
  WA_MPCR_CAUSE_D-MAINTCOMPLIANCEDESCRIPTION, sy-vline,
  WA_MPCR_CAUSE_D-MAINTENANCEPACKAGE, sy-vline,
  WA_MPCR_CAUSE_D-MAINTCMPLRQISLEGALLYBINDING, sy-vline,
  WA_MPCR_CAUSE_D-MAINTCMPLRQORIGINCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MPCR_CAUSE_D 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_MPCR_CAUSE_D 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_MPCR_CAUSE_D INTO WA_MPCR_CAUSE_D.


*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 MAINTENANCEITEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MPCR_CAUSE_D-MAINTENANCEITEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPCR_CAUSE_D-MAINTENANCEITEM.
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_MPCR_CAUSE_D_STR, 
MANDT TYPE STRING,
MAINTENANCEITEM TYPE STRING,
NMBROFMAINTCOMPLIANCEITEMS TYPE STRING,
MAINTENANCECOMPLIANCEGROUPCODE TYPE STRING,
MAINTENANCECOMPLIANCECODE TYPE STRING,
MAINTENANCECOMPLIANCETYPECODE TYPE STRING,
MAINTCOMPLIANCECATALOGCODE TYPE STRING,
MAINTCOMPLIANCEDESCRIPTION TYPE STRING,
MAINTENANCEPACKAGE TYPE STRING,
MAINTCMPLRQISLEGALLYBINDING TYPE STRING,
MAINTCMPLRQORIGINCODE TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
LASTCHANGEDATE TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTFIELDCHANGES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MPCR_CAUSE_D_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_MPCR_CAUSE_D_STR-MANDT sy-vline 
WA_MPCR_CAUSE_D_STR-MAINTENANCEITEM sy-vline 
WA_MPCR_CAUSE_D_STR-NMBROFMAINTCOMPLIANCEITEMS sy-vline 
WA_MPCR_CAUSE_D_STR-MAINTENANCECOMPLIANCEGROUPCODE sy-vline 
WA_MPCR_CAUSE_D_STR-MAINTENANCECOMPLIANCECODE sy-vline 
WA_MPCR_CAUSE_D_STR-MAINTENANCECOMPLIANCETYPECODE sy-vline 
WA_MPCR_CAUSE_D_STR-MAINTCOMPLIANCECATALOGCODE sy-vline 
WA_MPCR_CAUSE_D_STR-MAINTCOMPLIANCEDESCRIPTION sy-vline 
WA_MPCR_CAUSE_D_STR-MAINTENANCEPACKAGE sy-vline 
WA_MPCR_CAUSE_D_STR-MAINTCMPLRQISLEGALLYBINDING sy-vline 
WA_MPCR_CAUSE_D_STR-MAINTCMPLRQORIGINCODE sy-vline 
WA_MPCR_CAUSE_D_STR-CREATEDBYUSER sy-vline 
WA_MPCR_CAUSE_D_STR-CREATIONDATE sy-vline 
WA_MPCR_CAUSE_D_STR-LASTCHANGEDBYUSER sy-vline 
WA_MPCR_CAUSE_D_STR-LASTCHANGEDATE sy-vline 
WA_MPCR_CAUSE_D_STR-LASTCHANGEDATETIME sy-vline 
WA_MPCR_CAUSE_D_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_MPCR_CAUSE_D_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_MPCR_CAUSE_D_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_MPCR_CAUSE_D_STR-DRAFTENTITYOPERATIONCODE sy-vline 
WA_MPCR_CAUSE_D_STR-HASACTIVEENTITY sy-vline 
WA_MPCR_CAUSE_D_STR-DRAFTFIELDCHANGES sy-vline      INTO ld_text SEPARATED BY SPACE.

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