ABAP Select data from SAP table ASPECMATASSIGN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ASPECMATASSIGN
*  INTO TABLE @DATA(IT_ASPECMATASSIGN2).
*--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_ASPECMATASSIGN INDEX 1 INTO DATA(WA_ASPECMATASSIGN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ASPECMATASSIGN>-MANDT = 1.
<ASPECMATASSIGN>-SPECMATERIALASSGMTINTERNALID = 1.
<ASPECMATASSIGN>-SPECMATERIALASSGMTCHANGESTATE = 1.
<ASPECMATASSIGN>-MATERIAL = 1.
<ASPECMATASSIGN>-PLANT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ASPECMATASSIGN-PLANTNAME, sy-vline,
  WA_ASPECMATASSIGN-SPECMATERIALASSGMTCHANGEDATE, sy-vline,
  WA_ASPECMATASSIGN-SPECMATERIALASSGMTCHANGENUMBER, sy-vline,
  WA_ASPECMATASSIGN-SPECMATERIALASSGMTCREATEDBYUSR, sy-vline,
  WA_ASPECMATASSIGN-SPECMATERIALASSGMTCREATIONDATE, sy-vline,
  WA_ASPECMATASSIGN-SPECMATERIALASSGMTISDELETED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ASPECMATASSIGN 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_ASPECMATASSIGN 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_ASPECMATASSIGN INTO WA_ASPECMATASSIGN.


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

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

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

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

*Conversion exit ALPHA, internal->external for field SPECIFICATIONINTERNALID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ASPECMATASSIGN-SPECIFICATIONINTERNALID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASPECMATASSIGN-SPECIFICATIONINTERNALID.
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_ASPECMATASSIGN_STR, 
MANDT TYPE STRING,
SPECMATERIALASSGMTINTERNALID TYPE STRING,
SPECMATERIALASSGMTCHANGESTATE TYPE STRING,
MATERIAL TYPE STRING,
PLANT TYPE STRING,
PLANTNAME TYPE STRING,
SPECMATERIALASSGMTCHANGEDATE TYPE STRING,
SPECMATERIALASSGMTCHANGENUMBER TYPE STRING,
SPECMATERIALASSGMTCREATEDBYUSR TYPE STRING,
SPECMATERIALASSGMTCREATIONDATE TYPE STRING,
SPECMATERIALASSGMTISDELETED TYPE STRING,
SPECMATLASSGMTLASTCHANGEDBYUSR TYPE STRING,
SPECMATLASSGMTVALDTYENDDATE TYPE STRING,
SPECMATLASSGMTVALDTYSTARTDATE TYPE STRING,
SPECIFICATIONINTERNALID TYPE STRING,
SPECIFICATIONAUTHZNGROUP TYPE STRING,
SPECIFICATIONTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ASPECMATASSIGN_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_ASPECMATASSIGN_STR-MANDT sy-vline 
WA_ASPECMATASSIGN_STR-SPECMATERIALASSGMTINTERNALID sy-vline 
WA_ASPECMATASSIGN_STR-SPECMATERIALASSGMTCHANGESTATE sy-vline 
WA_ASPECMATASSIGN_STR-MATERIAL sy-vline 
WA_ASPECMATASSIGN_STR-PLANT sy-vline 
WA_ASPECMATASSIGN_STR-PLANTNAME sy-vline 
WA_ASPECMATASSIGN_STR-SPECMATERIALASSGMTCHANGEDATE sy-vline 
WA_ASPECMATASSIGN_STR-SPECMATERIALASSGMTCHANGENUMBER sy-vline 
WA_ASPECMATASSIGN_STR-SPECMATERIALASSGMTCREATEDBYUSR sy-vline 
WA_ASPECMATASSIGN_STR-SPECMATERIALASSGMTCREATIONDATE sy-vline 
WA_ASPECMATASSIGN_STR-SPECMATERIALASSGMTISDELETED sy-vline 
WA_ASPECMATASSIGN_STR-SPECMATLASSGMTLASTCHANGEDBYUSR sy-vline 
WA_ASPECMATASSIGN_STR-SPECMATLASSGMTVALDTYENDDATE sy-vline 
WA_ASPECMATASSIGN_STR-SPECMATLASSGMTVALDTYSTARTDATE sy-vline 
WA_ASPECMATASSIGN_STR-SPECIFICATIONINTERNALID sy-vline 
WA_ASPECMATASSIGN_STR-SPECIFICATIONAUTHZNGROUP sy-vline 
WA_ASPECMATASSIGN_STR-SPECIFICATIONTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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