ABAP Select data from SAP table PSCD_EINVO_CHRG_DISC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSCD_EINVO_CHRG_DISC
*  INTO TABLE @DATA(IT_PSCD_EINVO_CHRG_DISC2).
*--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_PSCD_EINVO_CHRG_DISC INDEX 1 INTO DATA(WA_PSCD_EINVO_CHRG_DISC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSCD_EINVO_CHRG_DISC>-DISC_CODE = 1.
<PSCD_EINVO_CHRG_DISC>-DISC_DESCRIPTION = 1.
<PSCD_EINVO_CHRG_DISC>-DISC_PERCENT = 1.
<PSCD_EINVO_CHRG_DISC>-DISC_BASE_AMOUNT = 1.
<PSCD_EINVO_CHRG_DISC>-DISC_AMOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSCD_EINVO_CHRG_DISC-DISC_QUANTITY, sy-vline,
  WA_PSCD_EINVO_CHRG_DISC-DISC_UNITOF_MEASURE, sy-vline,
  WA_PSCD_EINVO_CHRG_DISC-DISC_RATE_PER_UNIT, sy-vline,
  WA_PSCD_EINVO_CHRG_DISC-DISC_VAT_PERCENT, sy-vline,
  WA_PSCD_EINVO_CHRG_DISC-DISC_VAT_BASE_AMOUNT, sy-vline,
  WA_PSCD_EINVO_CHRG_DISC-DISC_VAT_AMOUNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSCD_EINVO_CHRG_DISC 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_PSCD_EINVO_CHRG_DISC 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_PSCD_EINVO_CHRG_DISC INTO WA_PSCD_EINVO_CHRG_DISC.


*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 CUNIT, internal->external for field DISC_UNITOF_MEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSCD_EINVO_CHRG_DISC-DISC_UNITOF_MEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSCD_EINVO_CHRG_DISC-DISC_UNITOF_MEASURE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field DISC_RATE_PER_UNIT
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_PSCD_EINVO_CHRG_DISC-DISC_RATE_PER_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSCD_EINVO_CHRG_DISC-DISC_RATE_PER_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field CHRG_UNITOF_MEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSCD_EINVO_CHRG_DISC-CHRG_UNITOF_MEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSCD_EINVO_CHRG_DISC-CHRG_UNITOF_MEASURE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field CHRG_RATE_PER_UNIT
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_PSCD_EINVO_CHRG_DISC-CHRG_RATE_PER_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSCD_EINVO_CHRG_DISC-CHRG_RATE_PER_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field TAX_UNITOF_MEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSCD_EINVO_CHRG_DISC-TAX_UNITOF_MEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSCD_EINVO_CHRG_DISC-TAX_UNITOF_MEASURE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field TAX_RATE_PER_UNIT
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_PSCD_EINVO_CHRG_DISC-TAX_RATE_PER_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSCD_EINVO_CHRG_DISC-TAX_RATE_PER_UNIT.
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_PSCD_EINVO_CHRG_DISC_STR, 
DISC_CODE TYPE STRING,
DISC_DESCRIPTION TYPE STRING,
DISC_PERCENT TYPE STRING,
DISC_BASE_AMOUNT TYPE STRING,
DISC_AMOUNT TYPE STRING,
DISC_QUANTITY TYPE STRING,
DISC_UNITOF_MEASURE TYPE STRING,
DISC_RATE_PER_UNIT TYPE STRING,
DISC_VAT_PERCENT TYPE STRING,
DISC_VAT_BASE_AMOUNT TYPE STRING,
DISC_VAT_AMOUNT TYPE STRING,
DISC_CALC_SEQ TYPE STRING,
CHRG_CODE TYPE STRING,
CHRG_DESCRIPTION TYPE STRING,
CHRG_PERCENT TYPE STRING,
CHRG_BASE_AMOUNT TYPE STRING,
CHRG_AMOUNT TYPE STRING,
CHRG_QUANTITY TYPE STRING,
CHRG_UNITOF_MEASURE TYPE STRING,
CHRG_RATE_PER_UNIT TYPE STRING,
CHRG_VAT_PERCENT TYPE STRING,
CHRG_VAT_BASE_AMOUNT TYPE STRING,
CHRG_VAT_AMOUNT TYPE STRING,
CHRG_CALC_SEQ TYPE STRING,
TAX_CODE TYPE STRING,
TAX_DESCRIPTION TYPE STRING,
TAX_PERCENT TYPE STRING,
TAX_BASE_AMOUNT TYPE STRING,
TAX_AMOUNT TYPE STRING,
TAX_QUANTITY TYPE STRING,
TAX_UNITOF_MEASURE TYPE STRING,
TAX_RATE_PER_UNIT TYPE STRING,
TAX_VAT_PERCENT TYPE STRING,
TAX_VAT_BASE_AMOUNT TYPE STRING,
TAX_VAT_AMOUNT TYPE STRING,
TAX_CALC_SEQ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSCD_EINVO_CHRG_DISC_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_PSCD_EINVO_CHRG_DISC_STR-DISC_CODE sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-DISC_DESCRIPTION sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-DISC_PERCENT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-DISC_BASE_AMOUNT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-DISC_AMOUNT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-DISC_QUANTITY sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-DISC_UNITOF_MEASURE sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-DISC_RATE_PER_UNIT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-DISC_VAT_PERCENT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-DISC_VAT_BASE_AMOUNT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-DISC_VAT_AMOUNT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-DISC_CALC_SEQ sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-CHRG_CODE sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-CHRG_DESCRIPTION sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-CHRG_PERCENT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-CHRG_BASE_AMOUNT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-CHRG_AMOUNT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-CHRG_QUANTITY sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-CHRG_UNITOF_MEASURE sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-CHRG_RATE_PER_UNIT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-CHRG_VAT_PERCENT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-CHRG_VAT_BASE_AMOUNT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-CHRG_VAT_AMOUNT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-CHRG_CALC_SEQ sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-TAX_CODE sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-TAX_DESCRIPTION sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-TAX_PERCENT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-TAX_BASE_AMOUNT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-TAX_AMOUNT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-TAX_QUANTITY sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-TAX_UNITOF_MEASURE sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-TAX_RATE_PER_UNIT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-TAX_VAT_PERCENT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-TAX_VAT_BASE_AMOUNT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-TAX_VAT_AMOUNT sy-vline 
WA_PSCD_EINVO_CHRG_DISC_STR-TAX_CALC_SEQ sy-vline      INTO ld_text SEPARATED BY SPACE.

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