ABAP Select data from SAP table CMPEPRODHOLD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMPEPRODHOLD
*  INTO TABLE @DATA(IT_CMPEPRODHOLD2).
*--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_CMPEPRODHOLD INDEX 1 INTO DATA(WA_CMPEPRODHOLD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMPEPRODHOLD>-MANDT = 1.
<CMPEPRODHOLD>-PRODUCTIONHOLD = 1.
<CMPEPRODHOLD>-PRODUCTIONHOLDOBJECTTYPE = 1.
<CMPEPRODHOLD>-PRODUCTIONPLANT = 1.
<CMPEPRODHOLD>-MATERIAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMPEPRODHOLD-WORKCENTERINTERNALID, sy-vline,
  WA_CMPEPRODHOLD-WORKCENTERTYPECODE, sy-vline,
  WA_CMPEPRODHOLD-MANUFACTURINGORDER, sy-vline,
  WA_CMPEPRODHOLD-ORDERINTERNALID, sy-vline,
  WA_CMPEPRODHOLD-ORDEROPERATIONINTERNALID, sy-vline,
  WA_CMPEPRODHOLD-SHOPFLOORITEM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMPEPRODHOLD 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_CMPEPRODHOLD 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_CMPEPRODHOLD INTO WA_CMPEPRODHOLD.


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

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

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

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

*Conversion exit ALPHA, internal->external for field NOTIFICATION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMPEPRODHOLD-NOTIFICATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMPEPRODHOLD-NOTIFICATION.
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_CMPEPRODHOLD_STR, 
MANDT TYPE STRING,
PRODUCTIONHOLD TYPE STRING,
PRODUCTIONHOLDOBJECTTYPE TYPE STRING,
PRODUCTIONPLANT TYPE STRING,
MATERIAL TYPE STRING,
WORKCENTERINTERNALID TYPE STRING,
WORKCENTERTYPECODE TYPE STRING,
MANUFACTURINGORDER TYPE STRING,
ORDERINTERNALID TYPE STRING,
ORDEROPERATIONINTERNALID TYPE STRING,
SHOPFLOORITEM TYPE STRING,
OPACTYNTWKINSTANCE TYPE STRING,
OPACTYNTWKELEMENT TYPE STRING,
OPERATIONACTIVITYNAME TYPE STRING,
OPACTYNTWKELEMENTEXTERNALID TYPE STRING,
PRODUCTIONHOLDSTARTDATETIME TYPE STRING,
PRODUCTIONHOLDENDDATETIME TYPE STRING,
MFGACTIONREASONCODEGROUPCTLG TYPE STRING,
MFGACTIONREASONCODEGROUP TYPE STRING,
MANUFACTURINGACTIONREASONCODE TYPE STRING,
MFGACTIONREASONCODENAME TYPE STRING,
PRODUCTIONHOLDAPPLYNOTE TYPE STRING,
DEFECTINTERNALID TYPE STRING,
DEFECT TYPE STRING,
DEFECTTEXT TYPE STRING,
NOTIFICATION TYPE STRING,
NOTIFICATIONITEM TYPE STRING,
PRODNHOLDISAPPLDFORORDERCHG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMPEPRODHOLD_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_CMPEPRODHOLD_STR-MANDT sy-vline 
WA_CMPEPRODHOLD_STR-PRODUCTIONHOLD sy-vline 
WA_CMPEPRODHOLD_STR-PRODUCTIONHOLDOBJECTTYPE sy-vline 
WA_CMPEPRODHOLD_STR-PRODUCTIONPLANT sy-vline 
WA_CMPEPRODHOLD_STR-MATERIAL sy-vline 
WA_CMPEPRODHOLD_STR-WORKCENTERINTERNALID sy-vline 
WA_CMPEPRODHOLD_STR-WORKCENTERTYPECODE sy-vline 
WA_CMPEPRODHOLD_STR-MANUFACTURINGORDER sy-vline 
WA_CMPEPRODHOLD_STR-ORDERINTERNALID sy-vline 
WA_CMPEPRODHOLD_STR-ORDEROPERATIONINTERNALID sy-vline 
WA_CMPEPRODHOLD_STR-SHOPFLOORITEM sy-vline 
WA_CMPEPRODHOLD_STR-OPACTYNTWKINSTANCE sy-vline 
WA_CMPEPRODHOLD_STR-OPACTYNTWKELEMENT sy-vline 
WA_CMPEPRODHOLD_STR-OPERATIONACTIVITYNAME sy-vline 
WA_CMPEPRODHOLD_STR-OPACTYNTWKELEMENTEXTERNALID sy-vline 
WA_CMPEPRODHOLD_STR-PRODUCTIONHOLDSTARTDATETIME sy-vline 
WA_CMPEPRODHOLD_STR-PRODUCTIONHOLDENDDATETIME sy-vline 
WA_CMPEPRODHOLD_STR-MFGACTIONREASONCODEGROUPCTLG sy-vline 
WA_CMPEPRODHOLD_STR-MFGACTIONREASONCODEGROUP sy-vline 
WA_CMPEPRODHOLD_STR-MANUFACTURINGACTIONREASONCODE sy-vline 
WA_CMPEPRODHOLD_STR-MFGACTIONREASONCODENAME sy-vline 
WA_CMPEPRODHOLD_STR-PRODUCTIONHOLDAPPLYNOTE sy-vline 
WA_CMPEPRODHOLD_STR-DEFECTINTERNALID sy-vline 
WA_CMPEPRODHOLD_STR-DEFECT sy-vline 
WA_CMPEPRODHOLD_STR-DEFECTTEXT sy-vline 
WA_CMPEPRODHOLD_STR-NOTIFICATION sy-vline 
WA_CMPEPRODHOLD_STR-NOTIFICATIONITEM sy-vline 
WA_CMPEPRODHOLD_STR-PRODNHOLDISAPPLDFORORDERCHG sy-vline      INTO ld_text SEPARATED BY SPACE.

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