ABAP Select data from SAP table FCML_NWG_USER_VA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FCML_NWG_USER_VA
*  INTO TABLE @DATA(IT_FCML_NWG_USER_VA2).
*--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_FCML_NWG_USER_VA INDEX 1 INTO DATA(WA_FCML_NWG_USER_VA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FCML_NWG_USER_VA>-MANDT = 1.
<FCML_NWG_USER_VA>-USERNAME = 1.
<FCML_NWG_USER_VA>-PARENT_KEY = 1.
<FCML_NWG_USER_VA>-ROW_KEY = 1.
<FCML_NWG_USER_VA>-EXPANDED = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FCML_NWG_USER_VA-IS_LEAF, sy-vline,
  WA_FCML_NWG_USER_VA-TECH_NAME, sy-vline,
  WA_FCML_NWG_USER_VA-TEXT, sy-vline,
  WA_FCML_NWG_USER_VA-CHILDREN_LOADED, sy-vline,
  WA_FCML_NWG_USER_VA-IMAGE_SRC, sy-vline,
  WA_FCML_NWG_USER_VA-BOX_DISPLAY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FCML_NWG_USER_VA 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_FCML_NWG_USER_VA 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_FCML_NWG_USER_VA INTO WA_FCML_NWG_USER_VA.


*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_FCML_NWG_USER_VA_STR, 
MANDT TYPE STRING,
USERNAME TYPE STRING,
PARENT_KEY TYPE STRING,
ROW_KEY TYPE STRING,
EXPANDED TYPE STRING,
IS_LEAF TYPE STRING,
TECH_NAME TYPE STRING,
TEXT TYPE STRING,
CHILDREN_LOADED TYPE STRING,
IMAGE_SRC TYPE STRING,
BOX_DISPLAY TYPE STRING,
TOOLTIP_DISPLAY TYPE STRING,
CATEID TYPE STRING,
CATENAME TYPE STRING,
SUBCATEID TYPE STRING,
SUBCATENAME TYPE STRING,
FIELDID TYPE STRING,
FIELDNAME TYPE STRING,
FIELDSDESC TYPE STRING,
FIELDDESC TYPE STRING,
CB_RO_REF TYPE STRING,
DD_RO_REF TYPE STRING,
PT_RO_REF TYPE STRING,
CD_CC_REF TYPE STRING,
SAVEDATE TYPE STRING,
SAVETIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FCML_NWG_USER_VA_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_FCML_NWG_USER_VA_STR-MANDT sy-vline 
WA_FCML_NWG_USER_VA_STR-USERNAME sy-vline 
WA_FCML_NWG_USER_VA_STR-PARENT_KEY sy-vline 
WA_FCML_NWG_USER_VA_STR-ROW_KEY sy-vline 
WA_FCML_NWG_USER_VA_STR-EXPANDED sy-vline 
WA_FCML_NWG_USER_VA_STR-IS_LEAF sy-vline 
WA_FCML_NWG_USER_VA_STR-TECH_NAME sy-vline 
WA_FCML_NWG_USER_VA_STR-TEXT sy-vline 
WA_FCML_NWG_USER_VA_STR-CHILDREN_LOADED sy-vline 
WA_FCML_NWG_USER_VA_STR-IMAGE_SRC sy-vline 
WA_FCML_NWG_USER_VA_STR-BOX_DISPLAY sy-vline 
WA_FCML_NWG_USER_VA_STR-TOOLTIP_DISPLAY sy-vline 
WA_FCML_NWG_USER_VA_STR-CATEID sy-vline 
WA_FCML_NWG_USER_VA_STR-CATENAME sy-vline 
WA_FCML_NWG_USER_VA_STR-SUBCATEID sy-vline 
WA_FCML_NWG_USER_VA_STR-SUBCATENAME sy-vline 
WA_FCML_NWG_USER_VA_STR-FIELDID sy-vline 
WA_FCML_NWG_USER_VA_STR-FIELDNAME sy-vline 
WA_FCML_NWG_USER_VA_STR-FIELDSDESC sy-vline 
WA_FCML_NWG_USER_VA_STR-FIELDDESC sy-vline 
WA_FCML_NWG_USER_VA_STR-CB_RO_REF sy-vline 
WA_FCML_NWG_USER_VA_STR-DD_RO_REF sy-vline 
WA_FCML_NWG_USER_VA_STR-PT_RO_REF sy-vline 
WA_FCML_NWG_USER_VA_STR-CD_CC_REF sy-vline 
WA_FCML_NWG_USER_VA_STR-SAVEDATE sy-vline 
WA_FCML_NWG_USER_VA_STR-SAVETIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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