ABAP Select data from SAP table ICACHESUPPLIER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICACHESUPPLIER
*  INTO TABLE @DATA(IT_ICACHESUPPLIER2).
*--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_ICACHESUPPLIER INDEX 1 INTO DATA(WA_ICACHESUPPLIER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICACHESUPPLIER>-MANDT = 1.
<ICACHESUPPLIER>-MRPPLANT = 1.
<ICACHESUPPLIER>-MATERIAL = 1.
<ICACHESUPPLIER>-MRPAREA = 1.
<ICACHESUPPLIER>-MRPPLANNINGSEGMENTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICACHESUPPLIER-MRPPLANNINGSEGMENT, sy-vline,
  WA_ICACHESUPPLIER-SUPPLIER, sy-vline,
  WA_ICACHESUPPLIER-SEQUENCENUMBER, sy-vline,
  WA_ICACHESUPPLIER-MRPELEMENTENDDATE, sy-vline,
  WA_ICACHESUPPLIER-SUPPLIERNAME, sy-vline,
  WA_ICACHESUPPLIER-AUTHORIZATIONGROUP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICACHESUPPLIER 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_ICACHESUPPLIER 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_ICACHESUPPLIER INTO WA_ICACHESUPPLIER.


*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 MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ICACHESUPPLIER-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICACHESUPPLIER-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SUPPLIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICACHESUPPLIER-SUPPLIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICACHESUPPLIER-SUPPLIER.
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_ICACHESUPPLIER_STR, 
MANDT TYPE STRING,
MRPPLANT TYPE STRING,
MATERIAL TYPE STRING,
MRPAREA TYPE STRING,
MRPPLANNINGSEGMENTTYPE TYPE STRING,
MRPPLANNINGSEGMENT TYPE STRING,
SUPPLIER TYPE STRING,
SEQUENCENUMBER TYPE STRING,
MRPELEMENTENDDATE TYPE STRING,
SUPPLIERNAME TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICACHESUPPLIER_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_ICACHESUPPLIER_STR-MANDT sy-vline 
WA_ICACHESUPPLIER_STR-MRPPLANT sy-vline 
WA_ICACHESUPPLIER_STR-MATERIAL sy-vline 
WA_ICACHESUPPLIER_STR-MRPAREA sy-vline 
WA_ICACHESUPPLIER_STR-MRPPLANNINGSEGMENTTYPE sy-vline 
WA_ICACHESUPPLIER_STR-MRPPLANNINGSEGMENT sy-vline 
WA_ICACHESUPPLIER_STR-SUPPLIER sy-vline 
WA_ICACHESUPPLIER_STR-SEQUENCENUMBER sy-vline 
WA_ICACHESUPPLIER_STR-MRPELEMENTENDDATE sy-vline 
WA_ICACHESUPPLIER_STR-SUPPLIERNAME sy-vline 
WA_ICACHESUPPLIER_STR-AUTHORIZATIONGROUP sy-vline      INTO ld_text SEPARATED BY SPACE.

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