ABAP Select data from SAP table /SAPAPO/FCST_LC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/FCST_LC 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 /SAPAPO/FCST_LC. 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 /SAPAPO/FCST_LC 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_/SAPAPO/FCST_LC TYPE STANDARD TABLE OF /SAPAPO/FCST_LC,
      WA_/SAPAPO/FCST_LC TYPE /SAPAPO/FCST_LC,
      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: </SAPAPO/FCST_LC> TYPE /SAPAPO/FCST_LC.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/FCST_LC
  INTO TABLE IT_/SAPAPO/FCST_LC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/FCST_LC
*  INTO TABLE @DATA(IT_/SAPAPO/FCST_LC2).
*--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_/SAPAPO/FCST_LC INDEX 1 INTO DATA(WA_/SAPAPO/FCST_LC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/FCST_LC ASSIGNING </SAPAPO/FCST_LC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/FCST_LC>-MANDT = 1.
</SAPAPO/FCST_LC>-PAREAID = 1.
</SAPAPO/FCST_LC>-MERKMAL1 = 1.
</SAPAPO/FCST_LC>-MERKMAL2 = 1.
</SAPAPO/FCST_LC>-MERKMAL3 = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/FCST_LC INTO WA_/SAPAPO/FCST_LC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/FCST_LC-MERKMAL4, sy-vline,
  WA_/SAPAPO/FCST_LC-MERKMAL5, sy-vline,
  WA_/SAPAPO/FCST_LC-MERKMAL6, sy-vline,
  WA_/SAPAPO/FCST_LC-LIKEID, sy-vline,
  WA_/SAPAPO/FCST_LC-LIKENO, sy-vline,
  WA_/SAPAPO/FCST_LC-PHIN_TSID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/FCST_LC 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_/SAPAPO/FCST_LC 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_/SAPAPO/FCST_LC INTO WA_/SAPAPO/FCST_LC.


*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 PARE2, internal->external for field PAREAID
CALL FUNCTION 'CONVERSION_EXIT_PARE2_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/FCST_LC-PAREAID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/FCST_LC-PAREAID.
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_/SAPAPO/FCST_LC_STR, 
MANDT TYPE STRING,
PAREAID TYPE STRING,
MERKMAL1 TYPE STRING,
MERKMAL2 TYPE STRING,
MERKMAL3 TYPE STRING,
MERKMAL4 TYPE STRING,
MERKMAL5 TYPE STRING,
MERKMAL6 TYPE STRING,
LIKEID TYPE STRING,
LIKENO TYPE STRING,
PHIN_TSID TYPE STRING,
PHOUT_TSID TYPE STRING,
MERKMAL1_TEXT TYPE STRING,
MERKMAL2_TEXT TYPE STRING,
MERKMAL3_TEXT TYPE STRING,
MERKMAL4_TEXT TYPE STRING,
MERKMAL5_TEXT TYPE STRING,
MERKMAL6_TEXT TYPE STRING,
PHIN_FROM TYPE STRING,
PHIN_TO TYPE STRING,
PHOUT_FROM TYPE STRING,
PHOUT_TO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/FCST_LC_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_/SAPAPO/FCST_LC_STR-MANDT sy-vline 
WA_/SAPAPO/FCST_LC_STR-PAREAID sy-vline 
WA_/SAPAPO/FCST_LC_STR-MERKMAL1 sy-vline 
WA_/SAPAPO/FCST_LC_STR-MERKMAL2 sy-vline 
WA_/SAPAPO/FCST_LC_STR-MERKMAL3 sy-vline 
WA_/SAPAPO/FCST_LC_STR-MERKMAL4 sy-vline 
WA_/SAPAPO/FCST_LC_STR-MERKMAL5 sy-vline 
WA_/SAPAPO/FCST_LC_STR-MERKMAL6 sy-vline 
WA_/SAPAPO/FCST_LC_STR-LIKEID sy-vline 
WA_/SAPAPO/FCST_LC_STR-LIKENO sy-vline 
WA_/SAPAPO/FCST_LC_STR-PHIN_TSID sy-vline 
WA_/SAPAPO/FCST_LC_STR-PHOUT_TSID sy-vline 
WA_/SAPAPO/FCST_LC_STR-MERKMAL1_TEXT sy-vline 
WA_/SAPAPO/FCST_LC_STR-MERKMAL2_TEXT sy-vline 
WA_/SAPAPO/FCST_LC_STR-MERKMAL3_TEXT sy-vline 
WA_/SAPAPO/FCST_LC_STR-MERKMAL4_TEXT sy-vline 
WA_/SAPAPO/FCST_LC_STR-MERKMAL5_TEXT sy-vline 
WA_/SAPAPO/FCST_LC_STR-MERKMAL6_TEXT sy-vline 
WA_/SAPAPO/FCST_LC_STR-PHIN_FROM sy-vline 
WA_/SAPAPO/FCST_LC_STR-PHIN_TO sy-vline 
WA_/SAPAPO/FCST_LC_STR-PHOUT_FROM sy-vline 
WA_/SAPAPO/FCST_LC_STR-PHOUT_TO sy-vline      INTO ld_text SEPARATED BY SPACE.

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