ABAP Select data from SAP table PRELCHKMONT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PRELCHKMONT
*  INTO TABLE @DATA(IT_PRELCHKMONT2).
*--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_PRELCHKMONT INDEX 1 INTO DATA(WA_PRELCHKMONT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PRELCHKMONT>-MANDT = 1.
<PRELCHKMONT>-ARUNRELEASECHECKRUNUUID = 1.
<PRELCHKMONT>-ARUNRELEASECHECKVARIANTUUID = 1.
<PRELCHKMONT>-SUPASSGMTEXECUTIONMODE = 1.
<PRELCHKMONT>-ARUNRELEASECHECKVARIANTNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PRELCHKMONT-SUPASSIGNRUNISSIMULATION, sy-vline,
  WA_PRELCHKMONT-ARUNRELEASECHECKGROUPNAME, sy-vline,
  WA_PRELCHKMONT-STARTEDBYUSER, sy-vline,
  WA_PRELCHKMONT-ARUNRELCHKSTARTUTCDATETIME, sy-vline,
  WA_PRELCHKMONT-ALLOCATIONRUNSTATUS, sy-vline,
  WA_PRELCHKMONT-LOGHANDLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PRELCHKMONT 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_PRELCHKMONT 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_PRELCHKMONT INTO WA_PRELCHKMONT.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PRELCHKMONT_STR, 
MANDT TYPE STRING,
ARUNRELEASECHECKRUNUUID TYPE STRING,
ARUNRELEASECHECKVARIANTUUID TYPE STRING,
SUPASSGMTEXECUTIONMODE TYPE STRING,
ARUNRELEASECHECKVARIANTNAME TYPE STRING,
SUPASSIGNRUNISSIMULATION TYPE STRING,
ARUNRELEASECHECKGROUPNAME TYPE STRING,
STARTEDBYUSER TYPE STRING,
ARUNRELCHKSTARTUTCDATETIME TYPE STRING,
ALLOCATIONRUNSTATUS TYPE STRING,
LOGHANDLE TYPE STRING,
ORDERQUANTITY TYPE STRING,
CONFIRMEDRQMTQTYINBASEUNIT TYPE STRING,
DELIVEREDQUANTITYINBASEUNIT TYPE STRING,
ASSIGNEDQUANTITYINBASEUNIT TYPE STRING,
FIXEDQUANTITYINBASEUNIT TYPE STRING,
ONHOLDQUANTITYINBASEUNIT TYPE STRING,
SUPASSGMTRESERVEDQTYINBASEUNIT TYPE STRING,
ACTLAMT TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PRELCHKMONT_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_PRELCHKMONT_STR-MANDT sy-vline 
WA_PRELCHKMONT_STR-ARUNRELEASECHECKRUNUUID sy-vline 
WA_PRELCHKMONT_STR-ARUNRELEASECHECKVARIANTUUID sy-vline 
WA_PRELCHKMONT_STR-SUPASSGMTEXECUTIONMODE sy-vline 
WA_PRELCHKMONT_STR-ARUNRELEASECHECKVARIANTNAME sy-vline 
WA_PRELCHKMONT_STR-SUPASSIGNRUNISSIMULATION sy-vline 
WA_PRELCHKMONT_STR-ARUNRELEASECHECKGROUPNAME sy-vline 
WA_PRELCHKMONT_STR-STARTEDBYUSER sy-vline 
WA_PRELCHKMONT_STR-ARUNRELCHKSTARTUTCDATETIME sy-vline 
WA_PRELCHKMONT_STR-ALLOCATIONRUNSTATUS sy-vline 
WA_PRELCHKMONT_STR-LOGHANDLE sy-vline 
WA_PRELCHKMONT_STR-ORDERQUANTITY sy-vline 
WA_PRELCHKMONT_STR-CONFIRMEDRQMTQTYINBASEUNIT sy-vline 
WA_PRELCHKMONT_STR-DELIVEREDQUANTITYINBASEUNIT sy-vline 
WA_PRELCHKMONT_STR-ASSIGNEDQUANTITYINBASEUNIT sy-vline 
WA_PRELCHKMONT_STR-FIXEDQUANTITYINBASEUNIT sy-vline 
WA_PRELCHKMONT_STR-ONHOLDQUANTITYINBASEUNIT sy-vline 
WA_PRELCHKMONT_STR-SUPASSGMTRESERVEDQTYINBASEUNIT sy-vline 
WA_PRELCHKMONT_STR-ACTLAMT sy-vline 
WA_PRELCHKMONT_STR-DOCUMENTCURRENCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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