ABAP Select data from SAP table LISOURCE_PI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LISOURCE_PI
*  INTO TABLE @DATA(IT_LISOURCE_PI2).
*--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_LISOURCE_PI INDEX 1 INTO DATA(WA_LISOURCE_PI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LISOURCE_PI>-TIMESTAMP = 1.
<LISOURCE_PI>-QUANUNIT = 1.
<LISOURCE_PI>-VALUETYPE = 1.
<LISOURCE_PI>-CURTYPE = 1.
<LISOURCE_PI>-FISCPER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LISOURCE_PI-FISCVAR, sy-vline,
  WA_LISOURCE_PI-CHARTACCTS, sy-vline,
  WA_LISOURCE_PI-UPMOD, sy-vline,
  WA_LISOURCE_PI-VALUTYP, sy-vline,
  WA_LISOURCE_PI-CURRUNIT, sy-vline,
  WA_LISOURCE_PI-DEBIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LISOURCE_PI 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_LISOURCE_PI 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_LISOURCE_PI INTO WA_LISOURCE_PI.


*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 QUANUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LISOURCE_PI-QUANUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LISOURCE_PI-QUANUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field FISCPER
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_LISOURCE_PI-FISCPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LISOURCE_PI-FISCPER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field DEBIT
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_LISOURCE_PI-DEBIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LISOURCE_PI-DEBIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field CREDIT
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_LISOURCE_PI-CREDIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LISOURCE_PI-CREDIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field TURNOVER
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_LISOURCE_PI-TURNOVER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LISOURCE_PI-TURNOVER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ADQUANUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LISOURCE_PI-ADQUANUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LISOURCE_PI-ADQUANUNIT.
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_LISOURCE_PI_STR, 
TIMESTAMP TYPE STRING,
QUANUNIT TYPE STRING,
VALUETYPE TYPE STRING,
CURTYPE TYPE STRING,
FISCPER TYPE STRING,
FISCVAR TYPE STRING,
CHARTACCTS TYPE STRING,
UPMOD TYPE STRING,
VALUTYP TYPE STRING,
CURRUNIT TYPE STRING,
DEBIT TYPE STRING,
CREDIT TYPE STRING,
TURNOVER TYPE STRING,
QUANTITY TYPE STRING,
ADQUANUNIT TYPE STRING,
ADQUANTITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LISOURCE_PI_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_LISOURCE_PI_STR-TIMESTAMP sy-vline 
WA_LISOURCE_PI_STR-QUANUNIT sy-vline 
WA_LISOURCE_PI_STR-VALUETYPE sy-vline 
WA_LISOURCE_PI_STR-CURTYPE sy-vline 
WA_LISOURCE_PI_STR-FISCPER sy-vline 
WA_LISOURCE_PI_STR-FISCVAR sy-vline 
WA_LISOURCE_PI_STR-CHARTACCTS sy-vline 
WA_LISOURCE_PI_STR-UPMOD sy-vline 
WA_LISOURCE_PI_STR-VALUTYP sy-vline 
WA_LISOURCE_PI_STR-CURRUNIT sy-vline 
WA_LISOURCE_PI_STR-DEBIT sy-vline 
WA_LISOURCE_PI_STR-CREDIT sy-vline 
WA_LISOURCE_PI_STR-TURNOVER sy-vline 
WA_LISOURCE_PI_STR-QUANTITY sy-vline 
WA_LISOURCE_PI_STR-ADQUANUNIT sy-vline 
WA_LISOURCE_PI_STR-ADQUANTITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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