ABAP Select data from SAP table IAMSNVH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IAMSNVH
*  INTO TABLE @DATA(IT_IAMSNVH2).
*--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_IAMSNVH INDEX 1 INTO DATA(WA_IAMSNVH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IAMSNVH>-MANDT = 1.
<IAMSNVH>-EQUIPMENT = 1.
<IAMSNVH>-MATERIAL = 1.
<IAMSNVH>-SERIALNUMBER = 1.
<IAMSNVH>-UNIQUEITEMIDENTIFIER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IAMSNVH-MANUFACTURERSERIALNUMBER, sy-vline,
  WA_IAMSNVH-CUSTOMER, sy-vline,
  WA_IAMSNVH-SUPPLIER, sy-vline,
  WA_IAMSNVH-AUTHORIZATIONGROUP, sy-vline,
  WA_IAMSNVH-SERIALNUMBERISONSTOCK, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_IAMSNVH 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_IAMSNVH 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_IAMSNVH INTO WA_IAMSNVH.


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

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

*Conversion exit GERNR, internal->external for field SERIALNUMBER
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_IAMSNVH-SERIALNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IAMSNVH-SERIALNUMBER.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field SUPPLIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IAMSNVH-SUPPLIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IAMSNVH-SUPPLIER.
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_IAMSNVH_STR, 
MANDT TYPE STRING,
EQUIPMENT TYPE STRING,
MATERIAL TYPE STRING,
SERIALNUMBER TYPE STRING,
UNIQUEITEMIDENTIFIER TYPE STRING,
MANUFACTURERSERIALNUMBER TYPE STRING,
CUSTOMER TYPE STRING,
SUPPLIER TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,
SERIALNUMBERISONSTOCK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IAMSNVH_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_IAMSNVH_STR-MANDT sy-vline 
WA_IAMSNVH_STR-EQUIPMENT sy-vline 
WA_IAMSNVH_STR-MATERIAL sy-vline 
WA_IAMSNVH_STR-SERIALNUMBER sy-vline 
WA_IAMSNVH_STR-UNIQUEITEMIDENTIFIER sy-vline 
WA_IAMSNVH_STR-MANUFACTURERSERIALNUMBER sy-vline 
WA_IAMSNVH_STR-CUSTOMER sy-vline 
WA_IAMSNVH_STR-SUPPLIER sy-vline 
WA_IAMSNVH_STR-AUTHORIZATIONGROUP sy-vline 
WA_IAMSNVH_STR-SERIALNUMBERISONSTOCK sy-vline      INTO ld_text SEPARATED BY SPACE.

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