ABAP Select data from SAP table V_T8PSCINPUT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_T8PSCINPUT 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 V_T8PSCINPUT. 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 V_T8PSCINPUT 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_V_T8PSCINPUT TYPE STANDARD TABLE OF V_T8PSCINPUT,
      WA_V_T8PSCINPUT TYPE V_T8PSCINPUT,
      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: <V_T8PSCINPUT> TYPE V_T8PSCINPUT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_T8PSCINPUT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_T8PSCINPUT
  INTO TABLE IT_V_T8PSCINPUT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_T8PSCINPUT
*  INTO TABLE @DATA(IT_V_T8PSCINPUT2).
*--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_V_T8PSCINPUT INDEX 1 INTO DATA(WA_V_T8PSCINPUT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_T8PSCINPUT ASSIGNING <V_T8PSCINPUT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_T8PSCINPUT>-MANDT = 1.
<V_T8PSCINPUT>-BUKRS = 1.
<V_T8PSCINPUT>-PSC_YEAR = 1.
<V_T8PSCINPUT>-PERIOD = 1.
<V_T8PSCINPUT>-PSC_NAME = 1.

ENDLOOP.

LOOP AT IT_V_T8PSCINPUT INTO WA_V_T8PSCINPUT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_T8PSCINPUT-PSC_PRODUCT, sy-vline,
  WA_V_T8PSCINPUT-VNAME, sy-vline,
  WA_V_T8PSCINPUT-ETYPE, sy-vline,
  WA_V_T8PSCINPUT-PSC_VOLUME, sy-vline,
  WA_V_T8PSCINPUT-UOM, sy-vline,
  WA_V_T8PSCINPUT-PSC_PPU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_T8PSCINPUT 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_V_T8PSCINPUT 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_V_T8PSCINPUT INTO WA_V_T8PSCINPUT.


*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 GJAHR, internal->external for field PSC_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_V_T8PSCINPUT-PSC_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_T8PSCINPUT-PSC_YEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VNAME
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_T8PSCINPUT-VNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_T8PSCINPUT-VNAME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ETYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_T8PSCINPUT-ETYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_T8PSCINPUT-ETYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_V_T8PSCINPUT-UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_T8PSCINPUT-UOM.
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_V_T8PSCINPUT_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
PSC_YEAR TYPE STRING,
PERIOD TYPE STRING,
PSC_NAME TYPE STRING,
PSC_PRODUCT TYPE STRING,
VNAME TYPE STRING,
ETYPE TYPE STRING,
PSC_VOLUME TYPE STRING,
UOM TYPE STRING,
PSC_PPU TYPE STRING,
VOLUME_FREQ TYPE STRING,
BTU_FACTOR TYPE STRING,
DAILY_API TYPE STRING,
VOLUME_TYPE TYPE STRING,
PSC_CURRENCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_T8PSCINPUT_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_V_T8PSCINPUT_STR-MANDT sy-vline 
WA_V_T8PSCINPUT_STR-BUKRS sy-vline 
WA_V_T8PSCINPUT_STR-PSC_YEAR sy-vline 
WA_V_T8PSCINPUT_STR-PERIOD sy-vline 
WA_V_T8PSCINPUT_STR-PSC_NAME sy-vline 
WA_V_T8PSCINPUT_STR-PSC_PRODUCT sy-vline 
WA_V_T8PSCINPUT_STR-VNAME sy-vline 
WA_V_T8PSCINPUT_STR-ETYPE sy-vline 
WA_V_T8PSCINPUT_STR-PSC_VOLUME sy-vline 
WA_V_T8PSCINPUT_STR-UOM sy-vline 
WA_V_T8PSCINPUT_STR-PSC_PPU sy-vline 
WA_V_T8PSCINPUT_STR-VOLUME_FREQ sy-vline 
WA_V_T8PSCINPUT_STR-BTU_FACTOR sy-vline 
WA_V_T8PSCINPUT_STR-DAILY_API sy-vline 
WA_V_T8PSCINPUT_STR-VOLUME_TYPE sy-vline 
WA_V_T8PSCINPUT_STR-PSC_CURRENCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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