ABAP Select data from SAP table CSERNOHIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CSERNOHIST
*  INTO TABLE @DATA(IT_CSERNOHIST2).
*--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_CSERNOHIST INDEX 1 INTO DATA(WA_CSERNOHIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CSERNOHIST>-MANDT = 1.
<CSERNOHIST>-EQUIPMENT = 1.
<CSERNOHIST>-DELIVERYDOCUMENT = 1.
<CSERNOHIST>-DELIVERYDOCUMENTITEM = 1.
<CSERNOHIST>-SALESORDER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CSERNOHIST-SALESORDERITEM, sy-vline,
  WA_CSERNOHIST-MATERIALDOCUMENTYEAR, sy-vline,
  WA_CSERNOHIST-MATERIALDOCUMENT, sy-vline,
  WA_CSERNOHIST-MATERIALDOCUMENTITEM, sy-vline,
  WA_CSERNOHIST-INSPECTIONLOT, sy-vline,
  WA_CSERNOHIST-PHYSICALINVENTORYDOCUMENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CSERNOHIST 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_CSERNOHIST 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_CSERNOHIST INTO WA_CSERNOHIST.


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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field PURCHASEREQUISITION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CSERNOHIST-PURCHASEREQUISITION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSERNOHIST-PURCHASEREQUISITION.
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_CSERNOHIST_STR, 
MANDT TYPE STRING,
EQUIPMENT TYPE STRING,
DELIVERYDOCUMENT TYPE STRING,
DELIVERYDOCUMENTITEM TYPE STRING,
SALESORDER TYPE STRING,
SALESORDERITEM TYPE STRING,
MATERIALDOCUMENTYEAR TYPE STRING,
MATERIALDOCUMENT TYPE STRING,
MATERIALDOCUMENTITEM TYPE STRING,
INSPECTIONLOT TYPE STRING,
PHYSICALINVENTORYDOCUMENT TYPE STRING,
PHYSICALINVENTORYDOCUMENTITEM TYPE STRING,
FISCALYEAR TYPE STRING,
PURCHASEORDER TYPE STRING,
PURCHASEORDERITEM TYPE STRING,
PURCHASEREQUISITION TYPE STRING,
PURCHASEREQUISITIONITEM TYPE STRING,
DOCUMENTDATE TYPE STRING,
SERIALNMBRHISTORYDOCUMENTTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CSERNOHIST_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_CSERNOHIST_STR-MANDT sy-vline 
WA_CSERNOHIST_STR-EQUIPMENT sy-vline 
WA_CSERNOHIST_STR-DELIVERYDOCUMENT sy-vline 
WA_CSERNOHIST_STR-DELIVERYDOCUMENTITEM sy-vline 
WA_CSERNOHIST_STR-SALESORDER sy-vline 
WA_CSERNOHIST_STR-SALESORDERITEM sy-vline 
WA_CSERNOHIST_STR-MATERIALDOCUMENTYEAR sy-vline 
WA_CSERNOHIST_STR-MATERIALDOCUMENT sy-vline 
WA_CSERNOHIST_STR-MATERIALDOCUMENTITEM sy-vline 
WA_CSERNOHIST_STR-INSPECTIONLOT sy-vline 
WA_CSERNOHIST_STR-PHYSICALINVENTORYDOCUMENT sy-vline 
WA_CSERNOHIST_STR-PHYSICALINVENTORYDOCUMENTITEM sy-vline 
WA_CSERNOHIST_STR-FISCALYEAR sy-vline 
WA_CSERNOHIST_STR-PURCHASEORDER sy-vline 
WA_CSERNOHIST_STR-PURCHASEORDERITEM sy-vline 
WA_CSERNOHIST_STR-PURCHASEREQUISITION sy-vline 
WA_CSERNOHIST_STR-PURCHASEREQUISITIONITEM sy-vline 
WA_CSERNOHIST_STR-DOCUMENTDATE sy-vline 
WA_CSERNOHIST_STR-SERIALNMBRHISTORYDOCUMENTTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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