ABAP Select data from SAP table EHFNDS_API_SUBSTANCE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP EHFNDS_API_SUBSTANCE 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_API_SUBSTANCE. 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_API_SUBSTANCE 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_API_SUBSTANCE TYPE STANDARD TABLE OF EHFNDS_API_SUBSTANCE,
      WA_EHFNDS_API_SUBSTANCE TYPE EHFNDS_API_SUBSTANCE,
      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_API_SUBSTANCE> TYPE EHFNDS_API_SUBSTANCE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHFNDS_API_SUBSTANCE
*  INTO TABLE @DATA(IT_EHFNDS_API_SUBSTANCE2).
*--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_API_SUBSTANCE INDEX 1 INTO DATA(WA_EHFNDS_API_SUBSTANCE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHFNDS_API_SUBSTANCE>-SENDER_TECHNICAL_ID = 1.
<EHFNDS_API_SUBSTANCE>-KEY = 1.
<EHFNDS_API_SUBSTANCE>-PARENT_KEY = 1.
<EHFNDS_API_SUBSTANCE>-ROOT_KEY = 1.
<EHFNDS_API_SUBSTANCE>-ACTIVESUBSTANCEUUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHFNDS_API_SUBSTANCE-CREATIONUTCDATETIME, sy-vline,
  WA_EHFNDS_API_SUBSTANCE-CREATEDBYUSER, sy-vline,
  WA_EHFNDS_API_SUBSTANCE-LASTCHANGEUTCDATETIME, sy-vline,
  WA_EHFNDS_API_SUBSTANCE-LASTCHANGEDBYUSER, sy-vline,
  WA_EHFNDS_API_SUBSTANCE-LISTEDSUBSTANCEUUID, sy-vline,
  WA_EHFNDS_API_SUBSTANCE-SUBSTANCEINTERNALNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHFNDS_API_SUBSTANCE 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_API_SUBSTANCE 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_API_SUBSTANCE INTO WA_EHFNDS_API_SUBSTANCE.


*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 SPEC1, internal->external for field SPECIFICATION
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_API_SUBSTANCE-SPECIFICATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_API_SUBSTANCE-SPECIFICATION.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit SPEC1, internal->external for field ARTIFICAL_SPECIFICATION
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_API_SUBSTANCE-ARTIFICAL_SPECIFICATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_API_SUBSTANCE-ARTIFICAL_SPECIFICATION.
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_API_SUBSTANCE_STR, 
SENDER_TECHNICAL_ID TYPE STRING,
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
ACTIVESUBSTANCEUUID TYPE STRING,
CREATIONUTCDATETIME TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEUTCDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
LISTEDSUBSTANCEUUID TYPE STRING,
SUBSTANCEINTERNALNAME TYPE STRING,
SUBSTANCENAME TYPE STRING,
COMPANYSUBSTANCENAME TYPE STRING,
RESPONSIBLEUNIT TYPE STRING,
SPECIFICATION TYPE STRING,
SPECIFICATIONINTERNALID TYPE STRING,
ACTIVEUUID TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYCONSISTENCYSTATUS TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,
ISACTIVEENTITY TYPE STRING,
IS_FAILED TYPE STRING,
CHANGE_MODE TYPE STRING,
LISTEDSUBSTANCE TYPE STRING,
CASNUMBER TYPE STRING,
ECNUMBER TYPE STRING,
MOLECULARFORMULA TYPE STRING,
LISTEDSUBSTANCENAME TYPE STRING,
LISTED_SUBSTANCE_CREATED TYPE STRING,
LISTED_SUBSTANCE_IS_GROUP TYPE STRING,
LISTED_SUBSTANCE_REF TYPE STRING,
ARTIFICAL_SPECIFICATION TYPE STRING,
OLD_KEY TYPE STRING,
NEW_KEY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHFNDS_API_SUBSTANCE_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_API_SUBSTANCE_STR-SENDER_TECHNICAL_ID sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-KEY sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-PARENT_KEY sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-ROOT_KEY sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-ACTIVESUBSTANCEUUID sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-CREATIONUTCDATETIME sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-CREATEDBYUSER sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-LASTCHANGEUTCDATETIME sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-LASTCHANGEDBYUSER sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-LISTEDSUBSTANCEUUID sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-SUBSTANCEINTERNALNAME sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-SUBSTANCENAME sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-COMPANYSUBSTANCENAME sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-RESPONSIBLEUNIT sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-SPECIFICATION sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-SPECIFICATIONINTERNALID sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-ACTIVEUUID sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-HASACTIVEENTITY sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-DRAFTENTITYCONSISTENCYSTATUS sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-DRAFTENTITYOPERATIONCODE sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-ISACTIVEENTITY sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-IS_FAILED sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-CHANGE_MODE sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-LISTEDSUBSTANCE sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-CASNUMBER sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-ECNUMBER sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-MOLECULARFORMULA sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-LISTEDSUBSTANCENAME sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-LISTED_SUBSTANCE_CREATED sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-LISTED_SUBSTANCE_IS_GROUP sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-LISTED_SUBSTANCE_REF sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-ARTIFICAL_SPECIFICATION sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-OLD_KEY sy-vline 
WA_EHFNDS_API_SUBSTANCE_STR-NEW_KEY sy-vline      INTO ld_text SEPARATED BY SPACE.

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