ABAP Select data from SAP table IRTGMTLASGN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IRTGMTLASGN
*  INTO TABLE @DATA(IT_IRTGMTLASGN2).
*--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_IRTGMTLASGN INDEX 1 INTO DATA(WA_IRTGMTLASGN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IRTGMTLASGN>-MANDT = 1.
<IRTGMTLASGN>-MATERIAL = 1.
<IRTGMTLASGN>-PLANT = 1.
<IRTGMTLASGN>-BILLOFOPERATIONSTYPE = 1.
<IRTGMTLASGN>-BILLOFOPERATIONSGROUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IRTGMTLASGN-BILLOFOPERATIONSVARIANT, sy-vline,
  WA_IRTGMTLASGN-BOOTOMATERIALINTERNALID, sy-vline,
  WA_IRTGMTLASGN-BOOMATLINTERNALVERSIONCOUNTER, sy-vline,
  WA_IRTGMTLASGN-VALIDITYSTARTDATE, sy-vline,
  WA_IRTGMTLASGN-VALIDITYENDDATE, sy-vline,
  WA_IRTGMTLASGN-CHANGENUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IRTGMTLASGN 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_IRTGMTLASGN 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_IRTGMTLASGN INTO WA_IRTGMTLASGN.


*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_IRTGMTLASGN-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IRTGMTLASGN-MATERIAL.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field CHANGENUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IRTGMTLASGN-CHANGENUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IRTGMTLASGN-CHANGENUMBER.
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_IRTGMTLASGN_STR, 
MANDT TYPE STRING,
MATERIAL TYPE STRING,
PLANT TYPE STRING,
BILLOFOPERATIONSTYPE TYPE STRING,
BILLOFOPERATIONSGROUP TYPE STRING,
BILLOFOPERATIONSVARIANT TYPE STRING,
BOOTOMATERIALINTERNALID TYPE STRING,
BOOMATLINTERNALVERSIONCOUNTER TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
CHANGENUMBER TYPE STRING,
CREATIONDATE TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEDATE TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
ISDELETED TYPE STRING,
ISIMPLICITLYDELETED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IRTGMTLASGN_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_IRTGMTLASGN_STR-MANDT sy-vline 
WA_IRTGMTLASGN_STR-MATERIAL sy-vline 
WA_IRTGMTLASGN_STR-PLANT sy-vline 
WA_IRTGMTLASGN_STR-BILLOFOPERATIONSTYPE sy-vline 
WA_IRTGMTLASGN_STR-BILLOFOPERATIONSGROUP sy-vline 
WA_IRTGMTLASGN_STR-BILLOFOPERATIONSVARIANT sy-vline 
WA_IRTGMTLASGN_STR-BOOTOMATERIALINTERNALID sy-vline 
WA_IRTGMTLASGN_STR-BOOMATLINTERNALVERSIONCOUNTER sy-vline 
WA_IRTGMTLASGN_STR-VALIDITYSTARTDATE sy-vline 
WA_IRTGMTLASGN_STR-VALIDITYENDDATE sy-vline 
WA_IRTGMTLASGN_STR-CHANGENUMBER sy-vline 
WA_IRTGMTLASGN_STR-CREATIONDATE sy-vline 
WA_IRTGMTLASGN_STR-CREATEDBYUSER sy-vline 
WA_IRTGMTLASGN_STR-LASTCHANGEDATE sy-vline 
WA_IRTGMTLASGN_STR-LASTCHANGEDBYUSER sy-vline 
WA_IRTGMTLASGN_STR-ISDELETED sy-vline 
WA_IRTGMTLASGN_STR-ISIMPLICITLYDELETED sy-vline      INTO ld_text SEPARATED BY SPACE.

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