ABAP Select data from SAP table EHFNDS_VARIABLES_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHFNDS_VARIABLES_DATA
*  INTO TABLE @DATA(IT_EHFNDS_VARIABLES_DATA2).
*--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_EHFNDS_VARIABLES_DATA INDEX 1 INTO DATA(WA_EHFNDS_VARIABLES_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHFNDS_VARIABLES_DATA>-SERIAL_NUMBER = 1.
<EHFNDS_VARIABLES_DATA>-ID = 1.
<EHFNDS_VARIABLES_DATA>-ID_REF_RESULT = 1.
<EHFNDS_VARIABLES_DATA>-NAME = 1.
<EHFNDS_VARIABLES_DATA>-UNIT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHFNDS_VARIABLES_DATA-T006D, sy-vline,
  WA_EHFNDS_VARIABLES_DATA-MANDT, sy-vline,
  WA_EHFNDS_VARIABLES_DATA-DIMID, sy-vline,
  WA_EHFNDS_VARIABLES_DATA-LENG, sy-vline,
  WA_EHFNDS_VARIABLES_DATA-MASS, sy-vline,
  WA_EHFNDS_VARIABLES_DATA-TIMEX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHFNDS_VARIABLES_DATA 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_EHFNDS_VARIABLES_DATA 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_EHFNDS_VARIABLES_DATA INTO WA_EHFNDS_VARIABLES_DATA.


*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 EHUNI, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_EHUNI_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_VARIABLES_DATA-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_VARIABLES_DATA-UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MSSIE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_VARIABLES_DATA-MSSIE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_VARIABLES_DATA-MSSIE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EHUNI, internal->external for field SIUNIT
CALL FUNCTION 'CONVERSION_EXIT_EHUNI_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_VARIABLES_DATA-SIUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_VARIABLES_DATA-SIUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DTPER, internal->external for field DATE_PERIOD
CALL FUNCTION 'CONVERSION_EXIT_DTPER_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_VARIABLES_DATA-DATE_PERIOD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_VARIABLES_DATA-DATE_PERIOD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DTPER, internal->external for field DATE_PERIOD_ORIGIN
CALL FUNCTION 'CONVERSION_EXIT_DTPER_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_VARIABLES_DATA-DATE_PERIOD_ORIGIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_VARIABLES_DATA-DATE_PERIOD_ORIGIN.
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_EHFNDS_VARIABLES_DATA_STR, 
SERIAL_NUMBER TYPE STRING,
ID TYPE STRING,
ID_REF_RESULT TYPE STRING,
NAME TYPE STRING,
UNIT TYPE STRING,
T006D TYPE STRING,
MANDT TYPE STRING,
DIMID TYPE STRING,
LENG TYPE STRING,
MASS TYPE STRING,
TIMEX TYPE STRING,
ECURR TYPE STRING,
TEMP TYPE STRING,
MOLQU TYPE STRING,
LIGHT TYPE STRING,
MSSIE TYPE STRING,
TEMP_DEP TYPE STRING,
PRESS_DEP TYPE STRING,
VALUE TYPE STRING,
VECTOR TYPE STRING,
SERIES TYPE STRING,
SIUNIT TYPE STRING,
SIVECTOR TYPE STRING,
SISERIES TYPE STRING,
EXPRESSION TYPE STRING,
EXPRESSION_CALCULATED TYPE STRING,
EXCEPTION TYPE STRING,
MESSAGES TYPE STRING,
AGGREGATION_SUM TYPE STRING,
AGGREGATION_AVG TYPE STRING,
AGGREGATION_MAX TYPE STRING,
AGGREGATION_MIN TYPE STRING,
AGGREGATION_COUNT TYPE STRING,
VALIDITY_DATE TYPE STRING,
DATE_PERIOD TYPE STRING,
DATE_PERIOD_ORIGIN TYPE STRING,
PRELIMINARY_IND TYPE STRING,
STATUS TYPE STRING,
EXPRESSION_ORIGIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHFNDS_VARIABLES_DATA_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_EHFNDS_VARIABLES_DATA_STR-SERIAL_NUMBER sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-ID sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-ID_REF_RESULT sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-NAME sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-UNIT sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-T006D sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-MANDT sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-DIMID sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-LENG sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-MASS sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-TIMEX sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-ECURR sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-TEMP sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-MOLQU sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-LIGHT sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-MSSIE sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-TEMP_DEP sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-PRESS_DEP sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-VALUE sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-VECTOR sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-SERIES sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-SIUNIT sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-SIVECTOR sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-SISERIES sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-EXPRESSION sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-EXPRESSION_CALCULATED sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-EXCEPTION sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-MESSAGES sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-AGGREGATION_SUM sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-AGGREGATION_AVG sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-AGGREGATION_MAX sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-AGGREGATION_MIN sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-AGGREGATION_COUNT sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-VALIDITY_DATE sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-DATE_PERIOD sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-DATE_PERIOD_ORIGIN sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-PRELIMINARY_IND sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-STATUS sy-vline 
WA_EHFNDS_VARIABLES_DATA_STR-EXPRESSION_ORIGIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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