ABAP Select data from SAP table FMLGD_STRUC_VWEZW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FMLGD_STRUC_VWEZW
*  INTO TABLE @DATA(IT_FMLGD_STRUC_VWEZW2).
*--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_FMLGD_STRUC_VWEZW INDEX 1 INTO DATA(WA_FMLGD_STRUC_VWEZW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FMLGD_STRUC_VWEZW>-VALTY = 1.
<FMLGD_STRUC_VWEZW>-VALUE = 1.
<FMLGD_STRUC_VWEZW>-BUKRS = 1.
<FMLGD_STRUC_VWEZW>-KUNNR = 1.
<FMLGD_STRUC_VWEZW>-LIFNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FMLGD_STRUC_VWEZW-SAKNR, sy-vline,
  WA_FMLGD_STRUC_VWEZW-FISTL, sy-vline,
  WA_FMLGD_STRUC_VWEZW-FIPEX, sy-vline,
  WA_FMLGD_STRUC_VWEZW-FONDS, sy-vline,
  WA_FMLGD_STRUC_VWEZW-PSOEA, sy-vline,
  WA_FMLGD_STRUC_VWEZW-KOSTL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FMLGD_STRUC_VWEZW 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_FMLGD_STRUC_VWEZW 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_FMLGD_STRUC_VWEZW INTO WA_FMLGD_STRUC_VWEZW.


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

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

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

*Conversion exit FMCIL, internal->external for field FIPEX
CALL FUNCTION 'CONVERSION_EXIT_FMCIL_OUTPUT'
  EXPORTING
    input =                      WA_FMLGD_STRUC_VWEZW-FIPEX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMLGD_STRUC_VWEZW-FIPEX.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FMLGD_STRUC_VWEZW-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMLGD_STRUC_VWEZW-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FMLGD_STRUC_VWEZW-KBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMLGD_STRUC_VWEZW-KBLNR.
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_FMLGD_STRUC_VWEZW_STR, 
VALTY TYPE STRING,
VALUE TYPE STRING,
BUKRS TYPE STRING,
KUNNR TYPE STRING,
LIFNR TYPE STRING,
SAKNR TYPE STRING,
FISTL TYPE STRING,
FIPEX TYPE STRING,
FONDS TYPE STRING,
PSOEA TYPE STRING,
KOSTL TYPE STRING,
AUFNR TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
KBLNR TYPE STRING,
KBLPOS TYPE STRING,
XBLNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FMLGD_STRUC_VWEZW_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_FMLGD_STRUC_VWEZW_STR-VALTY sy-vline 
WA_FMLGD_STRUC_VWEZW_STR-VALUE sy-vline 
WA_FMLGD_STRUC_VWEZW_STR-BUKRS sy-vline 
WA_FMLGD_STRUC_VWEZW_STR-KUNNR sy-vline 
WA_FMLGD_STRUC_VWEZW_STR-LIFNR sy-vline 
WA_FMLGD_STRUC_VWEZW_STR-SAKNR sy-vline 
WA_FMLGD_STRUC_VWEZW_STR-FISTL sy-vline 
WA_FMLGD_STRUC_VWEZW_STR-FIPEX sy-vline 
WA_FMLGD_STRUC_VWEZW_STR-FONDS sy-vline 
WA_FMLGD_STRUC_VWEZW_STR-PSOEA sy-vline 
WA_FMLGD_STRUC_VWEZW_STR-KOSTL sy-vline 
WA_FMLGD_STRUC_VWEZW_STR-AUFNR sy-vline 
WA_FMLGD_STRUC_VWEZW_STR-BELNR sy-vline 
WA_FMLGD_STRUC_VWEZW_STR-GJAHR sy-vline 
WA_FMLGD_STRUC_VWEZW_STR-KBLNR sy-vline 
WA_FMLGD_STRUC_VWEZW_STR-KBLPOS sy-vline 
WA_FMLGD_STRUC_VWEZW_STR-XBLNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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