ABAP Select data from SAP table FC06ASSLST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FC06ASSLST 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 FC06ASSLST. 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 FC06ASSLST 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_FC06ASSLST TYPE STANDARD TABLE OF FC06ASSLST,
      WA_FC06ASSLST TYPE FC06ASSLST,
      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: <FC06ASSLST> TYPE FC06ASSLST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FC06ASSLST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FC06ASSLST
  INTO TABLE IT_FC06ASSLST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FC06ASSLST
*  INTO TABLE @DATA(IT_FC06ASSLST2).
*--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_FC06ASSLST INDEX 1 INTO DATA(WA_FC06ASSLST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FC06ASSLST ASSIGNING <FC06ASSLST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FC06ASSLST>-COICU = 1.
<FC06ASSLST>-COTXT = 1.
<FC06ASSLST>-RYEAR = 1.
<FC06ASSLST>-PERID = 1.
<FC06ASSLST>-COINR = 1.

ENDLOOP.

LOOP AT IT_FC06ASSLST INTO WA_FC06ASSLST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FC06ASSLST-DTEQI, sy-vline,
  WA_FC06ASSLST-DTEQITXT, sy-vline,
  WA_FC06ASSLST-BKVLC, sy-vline,
  WA_FC06ASSLST-LCURR, sy-vline,
  WA_FC06ASSLST-BKVRC, sy-vline,
  WA_FC06ASSLST-CTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FC06ASSLST 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_FC06ASSLST 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_FC06ASSLST INTO WA_FC06ASSLST.


*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 AFIMC, internal->external for field COICU
CALL FUNCTION 'CONVERSION_EXIT_AFIMC_OUTPUT'
  EXPORTING
    input =                      WA_FC06ASSLST-COICU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC06ASSLST-COICU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FC06ASSLST-RYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC06ASSLST-RYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COINR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FC06ASSLST-COINR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC06ASSLST-COINR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU172, internal->external for field BKVLC
CALL FUNCTION 'CONVERSION_EXIT_AU172_OUTPUT'
  EXPORTING
    input =                      WA_FC06ASSLST-BKVLC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC06ASSLST-BKVLC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field BKVRC
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_FC06ASSLST-BKVRC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC06ASSLST-BKVRC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field CRATE
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_FC06ASSLST-CRATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC06ASSLST-CRATE.
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_FC06ASSLST_STR, 
COICU TYPE STRING,
COTXT TYPE STRING,
RYEAR TYPE STRING,
PERID TYPE STRING,
COINR TYPE STRING,
DTEQI TYPE STRING,
DTEQITXT TYPE STRING,
BKVLC TYPE STRING,
LCURR TYPE STRING,
BKVRC TYPE STRING,
CTYPE TYPE STRING,
CRATE TYPE STRING,
SITYP TYPE STRING,
SITEM TYPE STRING,
SVALU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FC06ASSLST_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_FC06ASSLST_STR-COICU sy-vline 
WA_FC06ASSLST_STR-COTXT sy-vline 
WA_FC06ASSLST_STR-RYEAR sy-vline 
WA_FC06ASSLST_STR-PERID sy-vline 
WA_FC06ASSLST_STR-COINR sy-vline 
WA_FC06ASSLST_STR-DTEQI sy-vline 
WA_FC06ASSLST_STR-DTEQITXT sy-vline 
WA_FC06ASSLST_STR-BKVLC sy-vline 
WA_FC06ASSLST_STR-LCURR sy-vline 
WA_FC06ASSLST_STR-BKVRC sy-vline 
WA_FC06ASSLST_STR-CTYPE sy-vline 
WA_FC06ASSLST_STR-CRATE sy-vline 
WA_FC06ASSLST_STR-SITYP sy-vline 
WA_FC06ASSLST_STR-SITEM sy-vline 
WA_FC06ASSLST_STR-SVALU sy-vline      INTO ld_text SEPARATED BY SPACE.

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