ABAP Select data from SAP table /ISDFPS/WMATLGBE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /ISDFPS/WMATLGBE 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 /ISDFPS/WMATLGBE. 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 /ISDFPS/WMATLGBE 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_/ISDFPS/WMATLGBE TYPE STANDARD TABLE OF /ISDFPS/WMATLGBE,
      WA_/ISDFPS/WMATLGBE TYPE /ISDFPS/WMATLGBE,
      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: </ISDFPS/WMATLGBE> TYPE /ISDFPS/WMATLGBE.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /ISDFPS/WMATLGBE
  INTO TABLE IT_/ISDFPS/WMATLGBE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ISDFPS/WMATLGBE
*  INTO TABLE @DATA(IT_/ISDFPS/WMATLGBE2).
*--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_/ISDFPS/WMATLGBE INDEX 1 INTO DATA(WA_/ISDFPS/WMATLGBE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/ISDFPS/WMATLGBE ASSIGNING </ISDFPS/WMATLGBE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ISDFPS/WMATLGBE>-MANDT = 1.
</ISDFPS/WMATLGBE>-LGNUM = 1.
</ISDFPS/WMATLGBE>-LGTYP = 1.
</ISDFPS/WMATLGBE>-LGBER = 1.
</ISDFPS/WMATLGBE>-WMOBJREFNR = 1.

ENDLOOP.

LOOP AT IT_/ISDFPS/WMATLGBE INTO WA_/ISDFPS/WMATLGBE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ISDFPS/WMATLGBE-ATTRIBNR1, sy-vline,
  WA_/ISDFPS/WMATLGBE-ATTRIBUT1, sy-vline,
  WA_/ISDFPS/WMATLGBE-ATTRIBNR2, sy-vline,
  WA_/ISDFPS/WMATLGBE-ATTRIBUT2, sy-vline,
  WA_/ISDFPS/WMATLGBE-ATTRIBNR3, sy-vline,
  WA_/ISDFPS/WMATLGBE-ATTRIBUT3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ISDFPS/WMATLGBE 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_/ISDFPS/WMATLGBE 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_/ISDFPS/WMATLGBE INTO WA_/ISDFPS/WMATLGBE.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_/ISDFPS/WMATLGBE_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
LGBER TYPE STRING,
WMOBJREFNR TYPE STRING,
ATTRIBNR1 TYPE STRING,
ATTRIBUT1 TYPE STRING,
ATTRIBNR2 TYPE STRING,
ATTRIBUT2 TYPE STRING,
ATTRIBNR3 TYPE STRING,
ATTRIBUT3 TYPE STRING,
ATTRIBNR4 TYPE STRING,
ATTRIBUT4 TYPE STRING,
ATTRIBNR5 TYPE STRING,
ATTRIBUT5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ISDFPS/WMATLGBE_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_/ISDFPS/WMATLGBE_STR-MANDT sy-vline 
WA_/ISDFPS/WMATLGBE_STR-LGNUM sy-vline 
WA_/ISDFPS/WMATLGBE_STR-LGTYP sy-vline 
WA_/ISDFPS/WMATLGBE_STR-LGBER sy-vline 
WA_/ISDFPS/WMATLGBE_STR-WMOBJREFNR sy-vline 
WA_/ISDFPS/WMATLGBE_STR-ATTRIBNR1 sy-vline 
WA_/ISDFPS/WMATLGBE_STR-ATTRIBUT1 sy-vline 
WA_/ISDFPS/WMATLGBE_STR-ATTRIBNR2 sy-vline 
WA_/ISDFPS/WMATLGBE_STR-ATTRIBUT2 sy-vline 
WA_/ISDFPS/WMATLGBE_STR-ATTRIBNR3 sy-vline 
WA_/ISDFPS/WMATLGBE_STR-ATTRIBUT3 sy-vline 
WA_/ISDFPS/WMATLGBE_STR-ATTRIBNR4 sy-vline 
WA_/ISDFPS/WMATLGBE_STR-ATTRIBUT4 sy-vline 
WA_/ISDFPS/WMATLGBE_STR-ATTRIBNR5 sy-vline 
WA_/ISDFPS/WMATLGBE_STR-ATTRIBUT5 sy-vline      INTO ld_text SEPARATED BY SPACE.

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