ABAP Select data from SAP table EHFNDS_API_PH_VAPOR_PRESS 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_VAPOR_PRESS 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_VAPOR_PRESS. 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_VAPOR_PRESS 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_VAPOR_PRESS TYPE STANDARD TABLE OF EHFNDS_API_PH_VAPOR_PRESS,
      WA_EHFNDS_API_PH_VAPOR_PRESS TYPE EHFNDS_API_PH_VAPOR_PRESS,
      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_VAPOR_PRESS> TYPE EHFNDS_API_PH_VAPOR_PRESS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHFNDS_API_PH_VAPOR_PRESS
*  INTO TABLE @DATA(IT_EHFNDS_API_PH_VAPOR_PRESS2).
*--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_VAPOR_PRESS INDEX 1 INTO DATA(WA_EHFNDS_API_PH_VAPOR_PRESS2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHFNDS_API_PH_VAPOR_PRESS-PHYSCHMLVAPORPRSSRQTYUNIT, sy-vline,
  WA_EHFNDS_API_PH_VAPOR_PRESS-PCPHYSVAPORPRSSR20LOWRQTYOPTR, sy-vline,
  WA_EHFNDS_API_PH_VAPOR_PRESS-PCPHYSVAPORPRSSR20LOWRQTYASTXT, sy-vline,
  WA_EHFNDS_API_PH_VAPOR_PRESS-PCPHYSVAPORPRSSR20UPRQTYOPTR, sy-vline,
  WA_EHFNDS_API_PH_VAPOR_PRESS-PCPHYSVAPORPRSSR20UPRQTYASTXT, sy-vline,
  WA_EHFNDS_API_PH_VAPOR_PRESS-PCPHYSVAPORPRSSR50LOWRQTYOPTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHFNDS_API_PH_VAPOR_PRESS 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_VAPOR_PRESS 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_VAPOR_PRESS INTO WA_EHFNDS_API_PH_VAPOR_PRESS.


*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_VAPOR_PRESS-INTERNAL_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_API_PH_VAPOR_PRESS-INTERNAL_NUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PHYSCHMLVAPORPRSSRQTYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_API_PH_VAPOR_PRESS-PHYSCHMLVAPORPRSSRQTYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_API_PH_VAPOR_PRESS-PHYSCHMLVAPORPRSSRQTYUNIT.
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_VAPOR_PRESS_STR, 
SENDER_TECHNICAL_ID TYPE STRING,
INTERNAL_NUMBER TYPE STRING,
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
PHYSCHMLVAPORPRSSRQTYUNIT TYPE STRING,
PCPHYSVAPORPRSSR20LOWRQTYOPTR TYPE STRING,
PCPHYSVAPORPRSSR20LOWRQTYASTXT TYPE STRING,
PCPHYSVAPORPRSSR20UPRQTYOPTR TYPE STRING,
PCPHYSVAPORPRSSR20UPRQTYASTXT TYPE STRING,
PCPHYSVAPORPRSSR50LOWRQTYOPTR TYPE STRING,
PCPHYSVAPORPRSSR50LOWRQTYASTXT TYPE STRING,
PCPHYSVAPORPRSSR50UPRQTYOPTR TYPE STRING,
PCPHYSVAPORPRSSR50UPRQTYASTXT TYPE STRING,
PCPHYSNOTETEXT TYPE STRING,
PCPHYSADDLSTATEMENTPHRSUUID TYPE STRING,
PCPHYSADDLSTATEMENTPHRS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHFNDS_API_PH_VAPOR_PRESS_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_VAPOR_PRESS_STR-SENDER_TECHNICAL_ID sy-vline 
WA_EHFNDS_API_PH_VAPOR_PRESS_STR-INTERNAL_NUMBER sy-vline 
WA_EHFNDS_API_PH_VAPOR_PRESS_STR-KEY sy-vline 
WA_EHFNDS_API_PH_VAPOR_PRESS_STR-PARENT_KEY sy-vline 
WA_EHFNDS_API_PH_VAPOR_PRESS_STR-ROOT_KEY sy-vline 
WA_EHFNDS_API_PH_VAPOR_PRESS_STR-PHYSCHMLVAPORPRSSRQTYUNIT sy-vline 
WA_EHFNDS_API_PH_VAPOR_PRESS_STR-PCPHYSVAPORPRSSR20LOWRQTYOPTR sy-vline 
WA_EHFNDS_API_PH_VAPOR_PRESS_STR-PCPHYSVAPORPRSSR20LOWRQTYASTXT sy-vline 
WA_EHFNDS_API_PH_VAPOR_PRESS_STR-PCPHYSVAPORPRSSR20UPRQTYOPTR sy-vline 
WA_EHFNDS_API_PH_VAPOR_PRESS_STR-PCPHYSVAPORPRSSR20UPRQTYASTXT sy-vline 
WA_EHFNDS_API_PH_VAPOR_PRESS_STR-PCPHYSVAPORPRSSR50LOWRQTYOPTR sy-vline 
WA_EHFNDS_API_PH_VAPOR_PRESS_STR-PCPHYSVAPORPRSSR50LOWRQTYASTXT sy-vline 
WA_EHFNDS_API_PH_VAPOR_PRESS_STR-PCPHYSVAPORPRSSR50UPRQTYOPTR sy-vline 
WA_EHFNDS_API_PH_VAPOR_PRESS_STR-PCPHYSVAPORPRSSR50UPRQTYASTXT sy-vline 
WA_EHFNDS_API_PH_VAPOR_PRESS_STR-PCPHYSNOTETEXT sy-vline 
WA_EHFNDS_API_PH_VAPOR_PRESS_STR-PCPHYSADDLSTATEMENTPHRSUUID sy-vline 
WA_EHFNDS_API_PH_VAPOR_PRESS_STR-PCPHYSADDLSTATEMENTPHRS sy-vline      INTO ld_text SEPARATED BY SPACE.

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