ABAP Select data from SAP table PGHOALLOCPROSCN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PGHOALLOCPROSCN
*  INTO TABLE @DATA(IT_PGHOALLOCPROSCN2).
*--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_PGHOALLOCPROSCN INDEX 1 INTO DATA(WA_PGHOALLOCPROSCN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PGHOALLOCPROSCN>-MANDT = 1.
<PGHOALLOCPROSCN>-NETWORKOBJECTID = 1.
<PGHOALLOCPROSCN>-FORECASTRESULTDATE = 1.
<PGHOALLOCPROSCN>-FORECASTRESULTTYPE = 1.
<PGHOALLOCPROSCN>-NETWORKMEDIUM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PGHOALLOCPROSCN-NETWORKOBJECTDESCRIPTION, sy-vline,
  WA_PGHOALLOCPROSCN-SCENARIOID, sy-vline,
  WA_PGHOALLOCPROSCN-UPSTREAMPROJECTID, sy-vline,
  WA_PGHOALLOCPROSCN-NETWORKOBJECTTYPE, sy-vline,
  WA_PGHOALLOCPROSCN-PRODUCTIONNETWORKNAME, sy-vline,
  WA_PGHOALLOCPROSCN-HYDROCARBONVOLUME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PGHOALLOCPROSCN 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_PGHOALLOCPROSCN 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_PGHOALLOCPROSCN INTO WA_PGHOALLOCPROSCN.


*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 GHOFC, internal->external for field PRODUCTIONNETWORKNAME
CALL FUNCTION 'CONVERSION_EXIT_GHOFC_OUTPUT'
  EXPORTING
    input =                      WA_PGHOALLOCPROSCN-PRODUCTIONNETWORKNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PGHOALLOCPROSCN-PRODUCTIONNETWORKNAME.
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_PGHOALLOCPROSCN_STR, 
MANDT TYPE STRING,
NETWORKOBJECTID TYPE STRING,
FORECASTRESULTDATE TYPE STRING,
FORECASTRESULTTYPE TYPE STRING,
NETWORKMEDIUM TYPE STRING,
NETWORKOBJECTDESCRIPTION TYPE STRING,
SCENARIOID TYPE STRING,
UPSTREAMPROJECTID TYPE STRING,
NETWORKOBJECTTYPE TYPE STRING,
PRODUCTIONNETWORKNAME TYPE STRING,
HYDROCARBONVOLUME TYPE STRING,
PROJFREQCODE TYPE STRING,
SCENARIONAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PGHOALLOCPROSCN_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_PGHOALLOCPROSCN_STR-MANDT sy-vline 
WA_PGHOALLOCPROSCN_STR-NETWORKOBJECTID sy-vline 
WA_PGHOALLOCPROSCN_STR-FORECASTRESULTDATE sy-vline 
WA_PGHOALLOCPROSCN_STR-FORECASTRESULTTYPE sy-vline 
WA_PGHOALLOCPROSCN_STR-NETWORKMEDIUM sy-vline 
WA_PGHOALLOCPROSCN_STR-NETWORKOBJECTDESCRIPTION sy-vline 
WA_PGHOALLOCPROSCN_STR-SCENARIOID sy-vline 
WA_PGHOALLOCPROSCN_STR-UPSTREAMPROJECTID sy-vline 
WA_PGHOALLOCPROSCN_STR-NETWORKOBJECTTYPE sy-vline 
WA_PGHOALLOCPROSCN_STR-PRODUCTIONNETWORKNAME sy-vline 
WA_PGHOALLOCPROSCN_STR-HYDROCARBONVOLUME sy-vline 
WA_PGHOALLOCPROSCN_STR-PROJFREQCODE sy-vline 
WA_PGHOALLOCPROSCN_STR-SCENARIONAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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