ABAP Select data from SAP table ICACHEMATERIAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICACHEMATERIAL
*  INTO TABLE @DATA(IT_ICACHEMATERIAL2).
*--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_ICACHEMATERIAL INDEX 1 INTO DATA(WA_ICACHEMATERIAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICACHEMATERIAL>-CLIENT = 1.
<ICACHEMATERIAL>-MATERIAL = 1.
<ICACHEMATERIAL>-MRPAREA = 1.
<ICACHEMATERIAL>-MRPPLANT = 1.
<ICACHEMATERIAL>-MRPCONTROLLER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICACHEMATERIAL-MATERIALSAFETYSTOCKQTY, sy-vline,
  WA_ICACHEMATERIAL-MATERIALBASEUNIT, sy-vline,
  WA_ICACHEMATERIAL-MATERIALTYPE, sy-vline,
  WA_ICACHEMATERIAL-PRODUCTIONSUPERVISOR, sy-vline,
  WA_ICACHEMATERIAL-FACTORYCALENDAR, sy-vline,
  WA_ICACHEMATERIAL-MATERIALREPLNMTLEADDURNENDDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICACHEMATERIAL 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_ICACHEMATERIAL 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_ICACHEMATERIAL INTO WA_ICACHEMATERIAL.


*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_ICACHEMATERIAL-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICACHEMATERIAL-MATERIAL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field MATERIALNAME
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ICACHEMATERIAL-MATERIALNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICACHEMATERIAL-MATERIALNAME.
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_ICACHEMATERIAL_STR, 
CLIENT TYPE STRING,
MATERIAL TYPE STRING,
MRPAREA TYPE STRING,
MRPPLANT TYPE STRING,
MRPCONTROLLER TYPE STRING,
MATERIALSAFETYSTOCKQTY TYPE STRING,
MATERIALBASEUNIT TYPE STRING,
MATERIALTYPE TYPE STRING,
PRODUCTIONSUPERVISOR TYPE STRING,
FACTORYCALENDAR TYPE STRING,
MATERIALREPLNMTLEADDURNENDDATE TYPE STRING,
TOTALREPLNMTLEADDURNENDDATE TYPE STRING,
MANUALPLANNINGHORIZONENDDATE TYPE STRING,
MRPSAFETYDURATIONENDDATE TYPE STRING,
MATERIALPROCUREMENTPROFILE TYPE STRING,
MATERIALPROCUREMENTCATEGORY TYPE STRING,
MRPTYPE TYPE STRING,
MATERIALPLANNEDDELIVERYDURN TYPE STRING,
MATERIALPLANNEDPRODUCTIONDURN TYPE STRING,
MRPSAFETYDURATION TYPE STRING,
PLANNINGTIMEFENCEINDAYS TYPE STRING,
PURCHASINGGROUP TYPE STRING,
MATERIALGOODSRECEIPTDURATION TYPE STRING,
MATERIALGROUP TYPE STRING,
MATERIALABCCLASSIFICATION TYPE STRING,
MRPGROUP TYPE STRING,
TOTALREPLENISHMENTLEADDURATION TYPE STRING,
MATERIALTYPENAME TYPE STRING,
MATERIALGROUPNAME TYPE STRING,
MATERIALNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICACHEMATERIAL_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_ICACHEMATERIAL_STR-CLIENT sy-vline 
WA_ICACHEMATERIAL_STR-MATERIAL sy-vline 
WA_ICACHEMATERIAL_STR-MRPAREA sy-vline 
WA_ICACHEMATERIAL_STR-MRPPLANT sy-vline 
WA_ICACHEMATERIAL_STR-MRPCONTROLLER sy-vline 
WA_ICACHEMATERIAL_STR-MATERIALSAFETYSTOCKQTY sy-vline 
WA_ICACHEMATERIAL_STR-MATERIALBASEUNIT sy-vline 
WA_ICACHEMATERIAL_STR-MATERIALTYPE sy-vline 
WA_ICACHEMATERIAL_STR-PRODUCTIONSUPERVISOR sy-vline 
WA_ICACHEMATERIAL_STR-FACTORYCALENDAR sy-vline 
WA_ICACHEMATERIAL_STR-MATERIALREPLNMTLEADDURNENDDATE sy-vline 
WA_ICACHEMATERIAL_STR-TOTALREPLNMTLEADDURNENDDATE sy-vline 
WA_ICACHEMATERIAL_STR-MANUALPLANNINGHORIZONENDDATE sy-vline 
WA_ICACHEMATERIAL_STR-MRPSAFETYDURATIONENDDATE sy-vline 
WA_ICACHEMATERIAL_STR-MATERIALPROCUREMENTPROFILE sy-vline 
WA_ICACHEMATERIAL_STR-MATERIALPROCUREMENTCATEGORY sy-vline 
WA_ICACHEMATERIAL_STR-MRPTYPE sy-vline 
WA_ICACHEMATERIAL_STR-MATERIALPLANNEDDELIVERYDURN sy-vline 
WA_ICACHEMATERIAL_STR-MATERIALPLANNEDPRODUCTIONDURN sy-vline 
WA_ICACHEMATERIAL_STR-MRPSAFETYDURATION sy-vline 
WA_ICACHEMATERIAL_STR-PLANNINGTIMEFENCEINDAYS sy-vline 
WA_ICACHEMATERIAL_STR-PURCHASINGGROUP sy-vline 
WA_ICACHEMATERIAL_STR-MATERIALGOODSRECEIPTDURATION sy-vline 
WA_ICACHEMATERIAL_STR-MATERIALGROUP sy-vline 
WA_ICACHEMATERIAL_STR-MATERIALABCCLASSIFICATION sy-vline 
WA_ICACHEMATERIAL_STR-MRPGROUP sy-vline 
WA_ICACHEMATERIAL_STR-TOTALREPLENISHMENTLEADDURATION sy-vline 
WA_ICACHEMATERIAL_STR-MATERIALTYPENAME sy-vline 
WA_ICACHEMATERIAL_STR-MATERIALGROUPNAME sy-vline 
WA_ICACHEMATERIAL_STR-MATERIALNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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