ABAP Select data from SAP table IWSTSTRMMTLGNBRL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IWSTSTRMMTLGNBRL
*  INTO TABLE @DATA(IT_IWSTSTRMMTLGNBRL2).
*--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_IWSTSTRMMTLGNBRL INDEX 1 INTO DATA(WA_IWSTSTRMMTLGNBRL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IWSTSTRMMTLGNBRL>-MANDT = 1.
<IWSTSTRMMTLGNBRL>-ENVRMTWASTEGNRTRUUID = 1.
<IWSTSTRMMTLGNBRL>-CHMLCMPLNCINFOUUID = 1.
<IWSTSTRMMTLGNBRL>-CHMLCMPLNCMATLASSGMTUUID = 1.
<IWSTSTRMMTLGNBRL>-MATERIAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IWSTSTRMMTLGNBRL-PRODUCTDESCRIPTION, sy-vline,
  WA_IWSTSTRMMTLGNBRL-ENVRMTWASTEGNRTRID, sy-vline,
  WA_IWSTSTRMMTLGNBRL-ENVRMTWASTEGNRTRNAME, sy-vline,
  WA_IWSTSTRMMTLGNBRL-COUNTRY, sy-vline,
  WA_IWSTSTRMMTLGNBRL-REGION, sy-vline,
  WA_IWSTSTRMMTLGNBRL-ENVRMTWASTEGNRTRVALDTYAREATXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IWSTSTRMMTLGNBRL 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_IWSTSTRMMTLGNBRL 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_IWSTSTRMMTLGNBRL INTO WA_IWSTSTRMMTLGNBRL.


*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_IWSTSTRMMTLGNBRL-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IWSTSTRMMTLGNBRL-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_IWSTSTRMMTLGNBRL_STR, 
MANDT TYPE STRING,
ENVRMTWASTEGNRTRUUID TYPE STRING,
CHMLCMPLNCINFOUUID TYPE STRING,
CHMLCMPLNCMATLASSGMTUUID TYPE STRING,
MATERIAL TYPE STRING,
PRODUCTDESCRIPTION TYPE STRING,
ENVRMTWASTEGNRTRID TYPE STRING,
ENVRMTWASTEGNRTRNAME TYPE STRING,
COUNTRY TYPE STRING,
REGION TYPE STRING,
ENVRMTWASTEGNRTRVALDTYAREATXT TYPE STRING,
ENVRMTWASTEGNRTRHASCURUSRASSGD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IWSTSTRMMTLGNBRL_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_IWSTSTRMMTLGNBRL_STR-MANDT sy-vline 
WA_IWSTSTRMMTLGNBRL_STR-ENVRMTWASTEGNRTRUUID sy-vline 
WA_IWSTSTRMMTLGNBRL_STR-CHMLCMPLNCINFOUUID sy-vline 
WA_IWSTSTRMMTLGNBRL_STR-CHMLCMPLNCMATLASSGMTUUID sy-vline 
WA_IWSTSTRMMTLGNBRL_STR-MATERIAL sy-vline 
WA_IWSTSTRMMTLGNBRL_STR-PRODUCTDESCRIPTION sy-vline 
WA_IWSTSTRMMTLGNBRL_STR-ENVRMTWASTEGNRTRID sy-vline 
WA_IWSTSTRMMTLGNBRL_STR-ENVRMTWASTEGNRTRNAME sy-vline 
WA_IWSTSTRMMTLGNBRL_STR-COUNTRY sy-vline 
WA_IWSTSTRMMTLGNBRL_STR-REGION sy-vline 
WA_IWSTSTRMMTLGNBRL_STR-ENVRMTWASTEGNRTRVALDTYAREATXT sy-vline 
WA_IWSTSTRMMTLGNBRL_STR-ENVRMTWASTEGNRTRHASCURUSRASSGD sy-vline      INTO ld_text SEPARATED BY SPACE.

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