ABAP Select data from SAP table CHISTMAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CHISTMAT
*  INTO TABLE @DATA(IT_CHISTMAT2).
*--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_CHISTMAT INDEX 1 INTO DATA(WA_CHISTMAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CHISTMAT>-MANDT = 1.
<CHISTMAT>-TECHNICALOBJECT = 1.
<CHISTMAT>-TECHOBJISEQUIPORFUNCNLLOC = 1.
<CHISTMAT>-MATERIAL = 1.
<CHISTMAT>-NOTIFICATIONTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CHISTMAT-MAINTENANCEORDERTYPE, sy-vline,
  WA_CHISTMAT-STORAGELOCATION, sy-vline,
  WA_CHISTMAT-PLANT, sy-vline,
  WA_CHISTMAT-MATERIALNAME, sy-vline,
  WA_CHISTMAT-RCRRCOFMATLUSAGEINTECHOBJ, sy-vline,
  WA_CHISTMAT-MATERIALTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CHISTMAT 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_CHISTMAT 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_CHISTMAT INTO WA_CHISTMAT.


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

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

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

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

*Conversion exit ALPHA, internal->external for field COSTCENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CHISTMAT-COSTCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CHISTMAT-COSTCENTER.
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_CHISTMAT_STR, 
MANDT TYPE STRING,
TECHNICALOBJECT TYPE STRING,
TECHOBJISEQUIPORFUNCNLLOC TYPE STRING,
MATERIAL TYPE STRING,
NOTIFICATIONTYPE TYPE STRING,
MAINTENANCEORDERTYPE TYPE STRING,
STORAGELOCATION TYPE STRING,
PLANT TYPE STRING,
MATERIALNAME TYPE STRING,
RCRRCOFMATLUSAGEINTECHOBJ TYPE STRING,
MATERIALTYPE TYPE STRING,
MATERIALGROUP TYPE STRING,
MATERIALGROSSWEIGHT TYPE STRING,
MATERIALNETWEIGHT TYPE STRING,
MATERIALBASEUNIT TYPE STRING,
MATERIALWEIGHTUNIT TYPE STRING,
MATERIALMANUFACTURERNUMBER TYPE STRING,
MATERIALMANUFACTURERPARTNUMBER TYPE STRING,
AVAILABILITYCHECKTYPE TYPE STRING,
MATLWRHSSTKQTYINMATLBASEUNIT TYPE STRING,
MATLWRHSSTKQTYONPLANTLVL TYPE STRING,
MATERIALAVAILABILITYSTATUS TYPE STRING,
REQUIREMENTQUANTITYINBASEUNIT TYPE STRING,
MATERIALTHUMBNAILMIMETYPE TYPE STRING,
MATERIALHASTHUMBNAIL TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,
MAINTENANCEPLANT TYPE STRING,
MAINTENANCEPLANNINGPLANT TYPE STRING,
MAINTENANCEPLANNERGROUP TYPE STRING,
CONTROLLINGAREA TYPE STRING,
COSTCENTER TYPE STRING,
TECHOBJAUTHORIZATIONGROUP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CHISTMAT_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_CHISTMAT_STR-MANDT sy-vline 
WA_CHISTMAT_STR-TECHNICALOBJECT sy-vline 
WA_CHISTMAT_STR-TECHOBJISEQUIPORFUNCNLLOC sy-vline 
WA_CHISTMAT_STR-MATERIAL sy-vline 
WA_CHISTMAT_STR-NOTIFICATIONTYPE sy-vline 
WA_CHISTMAT_STR-MAINTENANCEORDERTYPE sy-vline 
WA_CHISTMAT_STR-STORAGELOCATION sy-vline 
WA_CHISTMAT_STR-PLANT sy-vline 
WA_CHISTMAT_STR-MATERIALNAME sy-vline 
WA_CHISTMAT_STR-RCRRCOFMATLUSAGEINTECHOBJ sy-vline 
WA_CHISTMAT_STR-MATERIALTYPE sy-vline 
WA_CHISTMAT_STR-MATERIALGROUP sy-vline 
WA_CHISTMAT_STR-MATERIALGROSSWEIGHT sy-vline 
WA_CHISTMAT_STR-MATERIALNETWEIGHT sy-vline 
WA_CHISTMAT_STR-MATERIALBASEUNIT sy-vline 
WA_CHISTMAT_STR-MATERIALWEIGHTUNIT sy-vline 
WA_CHISTMAT_STR-MATERIALMANUFACTURERNUMBER sy-vline 
WA_CHISTMAT_STR-MATERIALMANUFACTURERPARTNUMBER sy-vline 
WA_CHISTMAT_STR-AVAILABILITYCHECKTYPE sy-vline 
WA_CHISTMAT_STR-MATLWRHSSTKQTYINMATLBASEUNIT sy-vline 
WA_CHISTMAT_STR-MATLWRHSSTKQTYONPLANTLVL sy-vline 
WA_CHISTMAT_STR-MATERIALAVAILABILITYSTATUS sy-vline 
WA_CHISTMAT_STR-REQUIREMENTQUANTITYINBASEUNIT sy-vline 
WA_CHISTMAT_STR-MATERIALTHUMBNAILMIMETYPE sy-vline 
WA_CHISTMAT_STR-MATERIALHASTHUMBNAIL sy-vline 
WA_CHISTMAT_STR-AUTHORIZATIONGROUP sy-vline 
WA_CHISTMAT_STR-MAINTENANCEPLANT sy-vline 
WA_CHISTMAT_STR-MAINTENANCEPLANNINGPLANT sy-vline 
WA_CHISTMAT_STR-MAINTENANCEPLANNERGROUP sy-vline 
WA_CHISTMAT_STR-CONTROLLINGAREA sy-vline 
WA_CHISTMAT_STR-COSTCENTER sy-vline 
WA_CHISTMAT_STR-TECHOBJAUTHORIZATIONGROUP sy-vline      INTO ld_text SEPARATED BY SPACE.

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