ABAP Select data from SAP table CMFGCERTMATLASGN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMFGCERTMATLASGN
*  INTO TABLE @DATA(IT_CMFGCERTMATLASGN2).
*--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_CMFGCERTMATLASGN INDEX 1 INTO DATA(WA_CMFGCERTMATLASGN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMFGCERTMATLASGN>-MANDT = 1.
<CMFGCERTMATLASGN>-MFGQUALIFNCERTIFICATE = 1.
<CMFGCERTMATLASGN>-MATERIAL = 1.
<CMFGCERTMATLASGN>-PLANT = 1.
<CMFGCERTMATLASGN>-PROCUREMENTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMFGCERTMATLASGN-MRPTYPE, sy-vline,
  WA_CMFGCERTMATLASGN-MATERIALTYPE, sy-vline,
  WA_CMFGCERTMATLASGN-MFGQUALIFNREQUIREDSKILLLEVEL, sy-vline,
  WA_CMFGCERTMATLASGN-VALIDITYSTARTDATE, sy-vline,
  WA_CMFGCERTMATLASGN-VALIDITYENDDATE, sy-vline,
  WA_CMFGCERTMATLASGN-CREATIONDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMFGCERTMATLASGN 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_CMFGCERTMATLASGN 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_CMFGCERTMATLASGN INTO WA_CMFGCERTMATLASGN.


*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_CMFGCERTMATLASGN-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMFGCERTMATLASGN-MATERIAL.
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_CMFGCERTMATLASGN_STR, 
MANDT TYPE STRING,
MFGQUALIFNCERTIFICATE TYPE STRING,
MATERIAL TYPE STRING,
PLANT TYPE STRING,
PROCUREMENTTYPE TYPE STRING,
MRPTYPE TYPE STRING,
MATERIALTYPE TYPE STRING,
MFGQUALIFNREQUIREDSKILLLEVEL TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
CREATIONDATE TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEDATE TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMFGCERTMATLASGN_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_CMFGCERTMATLASGN_STR-MANDT sy-vline 
WA_CMFGCERTMATLASGN_STR-MFGQUALIFNCERTIFICATE sy-vline 
WA_CMFGCERTMATLASGN_STR-MATERIAL sy-vline 
WA_CMFGCERTMATLASGN_STR-PLANT sy-vline 
WA_CMFGCERTMATLASGN_STR-PROCUREMENTTYPE sy-vline 
WA_CMFGCERTMATLASGN_STR-MRPTYPE sy-vline 
WA_CMFGCERTMATLASGN_STR-MATERIALTYPE sy-vline 
WA_CMFGCERTMATLASGN_STR-MFGQUALIFNREQUIREDSKILLLEVEL sy-vline 
WA_CMFGCERTMATLASGN_STR-VALIDITYSTARTDATE sy-vline 
WA_CMFGCERTMATLASGN_STR-VALIDITYENDDATE sy-vline 
WA_CMFGCERTMATLASGN_STR-CREATIONDATE sy-vline 
WA_CMFGCERTMATLASGN_STR-CREATEDBYUSER sy-vline 
WA_CMFGCERTMATLASGN_STR-LASTCHANGEDATE sy-vline 
WA_CMFGCERTMATLASGN_STR-LASTCHANGEDBYUSER sy-vline      INTO ld_text SEPARATED BY SPACE.

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