ABAP Select data from SAP table EHFNDS_API_PH_REL_DENSITY_ENH 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_PH_REL_DENSITY_ENH 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_PH_REL_DENSITY_ENH. 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_PH_REL_DENSITY_ENH 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_PH_REL_DENSITY_ENH TYPE STANDARD TABLE OF EHFNDS_API_PH_REL_DENSITY_ENH,
      WA_EHFNDS_API_PH_REL_DENSITY_ENH TYPE EHFNDS_API_PH_REL_DENSITY_ENH,
      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_PH_REL_DENSITY_ENH> TYPE EHFNDS_API_PH_REL_DENSITY_ENH.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHFNDS_API_PH_REL_DENSITY_ENH
*  INTO TABLE @DATA(IT_EHFNDS_API_PH_REL_DENSITY_ENH2).
*--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_PH_REL_DENSITY_ENH INDEX 1 INTO DATA(WA_EHFNDS_API_PH_REL_DENSITY_ENH2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHFNDS_API_PH_REL_DENSITY_ENH-PCPRPTYLOWRLMTOPTR, sy-vline,
  WA_EHFNDS_API_PH_REL_DENSITY_ENH-PHYSCHMLRLTVDENSLOWRQTYASTXT, sy-vline,
  WA_EHFNDS_API_PH_REL_DENSITY_ENH-PCPRPTYUPRLMTOPTR, sy-vline,
  WA_EHFNDS_API_PH_REL_DENSITY_ENH-PHYSCHMLRLTVDENSUPRQTYASTXT, sy-vline,
  WA_EHFNDS_API_PH_REL_DENSITY_ENH-PCPHYSNOTETEXT, sy-vline,
  WA_EHFNDS_API_PH_REL_DENSITY_ENH-PCPHYSADDLSTATEMENTPHRSUUID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHFNDS_API_PH_REL_DENSITY_ENH 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_PH_REL_DENSITY_ENH 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_PH_REL_DENSITY_ENH INTO WA_EHFNDS_API_PH_REL_DENSITY_ENH.


*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 INTERNAL_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_API_PH_REL_DENSITY_ENH-INTERNAL_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_API_PH_REL_DENSITY_ENH-INTERNAL_NUMBER.
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_PH_REL_DENSITY_ENH_STR, 
SENDER_TECHNICAL_ID TYPE STRING,
INTERNAL_NUMBER TYPE STRING,
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
PCPRPTYLOWRLMTOPTR TYPE STRING,
PHYSCHMLRLTVDENSLOWRQTYASTXT TYPE STRING,
PCPRPTYUPRLMTOPTR TYPE STRING,
PHYSCHMLRLTVDENSUPRQTYASTXT TYPE STRING,
PCPHYSNOTETEXT TYPE STRING,
PCPHYSADDLSTATEMENTPHRSUUID TYPE STRING,
PCPHYSADDLSTATEMENTPHRS TYPE STRING,
CREATIONUTCDATETIME TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEUTCDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
IS_FAILED TYPE STRING,
PHYSCHMLRLTVDENSLOWRQTY TYPE STRING,
PHYSCHMLRLTVDENSUPRQTY TYPE STRING,
OLD_KEY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHFNDS_API_PH_REL_DENSITY_ENH_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_PH_REL_DENSITY_ENH_STR-SENDER_TECHNICAL_ID sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-INTERNAL_NUMBER sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-KEY sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-PARENT_KEY sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-ROOT_KEY sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-PCPRPTYLOWRLMTOPTR sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-PHYSCHMLRLTVDENSLOWRQTYASTXT sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-PCPRPTYUPRLMTOPTR sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-PHYSCHMLRLTVDENSUPRQTYASTXT sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-PCPHYSNOTETEXT sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-PCPHYSADDLSTATEMENTPHRSUUID sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-PCPHYSADDLSTATEMENTPHRS sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-CREATIONUTCDATETIME sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-CREATEDBYUSER sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-LASTCHANGEUTCDATETIME sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-LASTCHANGEDBYUSER sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-IS_FAILED sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-PHYSCHMLRLTVDENSLOWRQTY sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-PHYSCHMLRLTVDENSUPRQTY sy-vline 
WA_EHFNDS_API_PH_REL_DENSITY_ENH_STR-OLD_KEY sy-vline      INTO ld_text SEPARATED BY SPACE.

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