ABAP Select data from SAP table IQXFILDESCX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IQXFILDESCX
*  INTO TABLE @DATA(IT_IQXFILDESCX2).
*--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_IQXFILDESCX INDEX 1 INTO DATA(WA_IQXFILDESCX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IQXFILDESCX>-TAB = 1.
<IQXFILDESCX>-FIELD = 1.
<IQXFILDESCX>-TEXTFIELD = 1.
<IQXFILDESCX>-NAME = 1.
<IQXFILDESCX>-TEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IQXFILDESCX-SCRNUMB, sy-vline,
  WA_IQXFILDESCX-KIND, sy-vline,
  WA_IQXFILDESCX-OBLIGATORY, sy-vline,
  WA_IQXFILDESCX-SPAGPA, sy-vline,
  WA_IQXFILDESCX-LOWER, sy-vline,
  WA_IQXFILDESCX-NO_DISPLAY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IQXFILDESCX 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_IQXFILDESCX 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_IQXFILDESCX INTO WA_IQXFILDESCX.


*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_IQXFILDESCX_STR, 
TAB TYPE STRING,
FIELD TYPE STRING,
TEXTFIELD TYPE STRING,
NAME TYPE STRING,
TEXT TYPE STRING,
SCRNUMB TYPE STRING,
KIND TYPE STRING,
OBLIGATORY TYPE STRING,
SPAGPA TYPE STRING,
LOWER TYPE STRING,
NO_DISPLAY TYPE STRING,
CHECKBOX TYPE STRING,
NO_INTERVALS TYPE STRING,
NO_EXTENSION TYPE STRING,
NO_OPTION_NO_SIGN TYPE STRING,
RADIOBUTTON TYPE STRING,
RGROUP TYPE STRING,
VALUE_CHECK TYPE STRING,
DEFAULT_SIGN TYPE STRING,
DEFAULT_OPTION TYPE STRING,
DEFAULT_LOW TYPE STRING,
DEFAULT_HIGH TYPE STRING,
NUMB TYPE STRING,
TYPE TYPE STRING,
DTYP TYPE STRING,
LENGTH TYPE STRING,
DECIMALS TYPE STRING,
OLENGTH TYPE STRING,
DBFIELD TYPE STRING,
DB TYPE STRING,
CONVEXIT TYPE STRING,
MATCHCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IQXFILDESCX_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_IQXFILDESCX_STR-TAB sy-vline 
WA_IQXFILDESCX_STR-FIELD sy-vline 
WA_IQXFILDESCX_STR-TEXTFIELD sy-vline 
WA_IQXFILDESCX_STR-NAME sy-vline 
WA_IQXFILDESCX_STR-TEXT sy-vline 
WA_IQXFILDESCX_STR-SCRNUMB sy-vline 
WA_IQXFILDESCX_STR-KIND sy-vline 
WA_IQXFILDESCX_STR-OBLIGATORY sy-vline 
WA_IQXFILDESCX_STR-SPAGPA sy-vline 
WA_IQXFILDESCX_STR-LOWER sy-vline 
WA_IQXFILDESCX_STR-NO_DISPLAY sy-vline 
WA_IQXFILDESCX_STR-CHECKBOX sy-vline 
WA_IQXFILDESCX_STR-NO_INTERVALS sy-vline 
WA_IQXFILDESCX_STR-NO_EXTENSION sy-vline 
WA_IQXFILDESCX_STR-NO_OPTION_NO_SIGN sy-vline 
WA_IQXFILDESCX_STR-RADIOBUTTON sy-vline 
WA_IQXFILDESCX_STR-RGROUP sy-vline 
WA_IQXFILDESCX_STR-VALUE_CHECK sy-vline 
WA_IQXFILDESCX_STR-DEFAULT_SIGN sy-vline 
WA_IQXFILDESCX_STR-DEFAULT_OPTION sy-vline 
WA_IQXFILDESCX_STR-DEFAULT_LOW sy-vline 
WA_IQXFILDESCX_STR-DEFAULT_HIGH sy-vline 
WA_IQXFILDESCX_STR-NUMB sy-vline 
WA_IQXFILDESCX_STR-TYPE sy-vline 
WA_IQXFILDESCX_STR-DTYP sy-vline 
WA_IQXFILDESCX_STR-LENGTH sy-vline 
WA_IQXFILDESCX_STR-DECIMALS sy-vline 
WA_IQXFILDESCX_STR-OLENGTH sy-vline 
WA_IQXFILDESCX_STR-DBFIELD sy-vline 
WA_IQXFILDESCX_STR-DB sy-vline 
WA_IQXFILDESCX_STR-CONVEXIT sy-vline 
WA_IQXFILDESCX_STR-MATCHCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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