ABAP Select data from SAP table MCH_S_PART into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCH_S_PART
*  INTO TABLE @DATA(IT_MCH_S_PART2).
*--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_MCH_S_PART INDEX 1 INTO DATA(WA_MCH_S_PART2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCH_S_PART>-MARK = 1.
<MCH_S_PART>-PARTNR = 1.
<MCH_S_PART>-STATUS = 1.
<MCH_S_PART>-STATUS_OUT = 1.
<MCH_S_PART>-TSTATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCH_S_PART-USERQUALOK, sy-vline,
  WA_MCH_S_PART-AGGRFLAG, sy-vline,
  WA_MCH_S_PART-AGGRNR, sy-vline,
  WA_MCH_S_PART-COMPFLAG, sy-vline,
  WA_MCH_S_PART-AGGRCOMPFLAG, sy-vline,
  WA_MCH_S_PART-REPORT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCH_S_PART 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_MCH_S_PART 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_MCH_S_PART INTO WA_MCH_S_PART.


*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 LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCH_S_PART-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCH_S_PART-LOGSYS.
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_MCH_S_PART_STR, 
MARK TYPE STRING,
PARTNR TYPE STRING,
STATUS TYPE STRING,
STATUS_OUT TYPE STRING,
TSTATUS TYPE STRING,
USERQUALOK TYPE STRING,
AGGRFLAG TYPE STRING,
AGGRNR TYPE STRING,
COMPFLAG TYPE STRING,
AGGRCOMPFLAG TYPE STRING,
REPORT TYPE STRING,
REPORT_INT TYPE STRING,
DMFLAG TYPE STRING,
ODSRNRSID TYPE STRING,
ODSRNR TYPE STRING,
BUTTON TYPE STRING,
INFOPAK TYPE STRING,
DATUM_ANF TYPE STRING,
DATUM_VERB TYPE STRING,
ZEIT_ANF TYPE STRING,
ZEIT_VERB TYPE STRING,
RNR TYPE STRING,
LOGDPID TYPE STRING,
JOBNAME TYPE STRING,
JOBCOUNT TYPE STRING,
JOBSTATUS TYPE STRING,
ORIGINALRNR TYPE STRING,
STORNOFLAG TYPE STRING,
ISOURCE TYPE STRING,
LOGSYS TYPE STRING,
OLTPSOURCE TYPE STRING,
ISOURCETXT TYPE STRING,
LOGSYSTXT TYPE STRING,
OLTPSOURCETXT TYPE STRING,
UPDMODE TYPE STRING,
UPDMODE_TEXT TYPE STRING,
SELOPT TYPE STRING,
ANZ_RECS TYPE STRING,
INSERT_RECS TYPE STRING,
ODS_ERR TYPE STRING,
REPAIR_FULL TYPE STRING,
DELFLAG TYPE STRING,
TIMESTAMP_ANF TYPE STRING,
TIMESTAMP_VERB TYPE STRING,
SOURCE_DTA TYPE STRING,
SOURCE_DTA_TYPE TYPE STRING,
S_DTA_TXT TYPE STRING,
S_DTA_TYPE_TXT TYPE STRING,
SDEL TYPE STRING,
SDEL_RECORDS TYPE STRING,
ARCHIVED TYPE STRING,
DM_FLAG_OUT TYPE STRING,
TS_ENTRY_MADE TYPE STRING,
ARCHIVFLAG TYPE STRING,
ACTPROT TYPE STRING,
LINESREADLONG TYPE STRING,
LINESTRANSFERREDLONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCH_S_PART_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_MCH_S_PART_STR-MARK sy-vline 
WA_MCH_S_PART_STR-PARTNR sy-vline 
WA_MCH_S_PART_STR-STATUS sy-vline 
WA_MCH_S_PART_STR-STATUS_OUT sy-vline 
WA_MCH_S_PART_STR-TSTATUS sy-vline 
WA_MCH_S_PART_STR-USERQUALOK sy-vline 
WA_MCH_S_PART_STR-AGGRFLAG sy-vline 
WA_MCH_S_PART_STR-AGGRNR sy-vline 
WA_MCH_S_PART_STR-COMPFLAG sy-vline 
WA_MCH_S_PART_STR-AGGRCOMPFLAG sy-vline 
WA_MCH_S_PART_STR-REPORT sy-vline 
WA_MCH_S_PART_STR-REPORT_INT sy-vline 
WA_MCH_S_PART_STR-DMFLAG sy-vline 
WA_MCH_S_PART_STR-ODSRNRSID sy-vline 
WA_MCH_S_PART_STR-ODSRNR sy-vline 
WA_MCH_S_PART_STR-BUTTON sy-vline 
WA_MCH_S_PART_STR-INFOPAK sy-vline 
WA_MCH_S_PART_STR-DATUM_ANF sy-vline 
WA_MCH_S_PART_STR-DATUM_VERB sy-vline 
WA_MCH_S_PART_STR-ZEIT_ANF sy-vline 
WA_MCH_S_PART_STR-ZEIT_VERB sy-vline 
WA_MCH_S_PART_STR-RNR sy-vline 
WA_MCH_S_PART_STR-LOGDPID sy-vline 
WA_MCH_S_PART_STR-JOBNAME sy-vline 
WA_MCH_S_PART_STR-JOBCOUNT sy-vline 
WA_MCH_S_PART_STR-JOBSTATUS sy-vline 
WA_MCH_S_PART_STR-ORIGINALRNR sy-vline 
WA_MCH_S_PART_STR-STORNOFLAG sy-vline 
WA_MCH_S_PART_STR-ISOURCE sy-vline 
WA_MCH_S_PART_STR-LOGSYS sy-vline 
WA_MCH_S_PART_STR-OLTPSOURCE sy-vline 
WA_MCH_S_PART_STR-ISOURCETXT sy-vline 
WA_MCH_S_PART_STR-LOGSYSTXT sy-vline 
WA_MCH_S_PART_STR-OLTPSOURCETXT sy-vline 
WA_MCH_S_PART_STR-UPDMODE sy-vline 
WA_MCH_S_PART_STR-UPDMODE_TEXT sy-vline 
WA_MCH_S_PART_STR-SELOPT sy-vline 
WA_MCH_S_PART_STR-ANZ_RECS sy-vline 
WA_MCH_S_PART_STR-INSERT_RECS sy-vline 
WA_MCH_S_PART_STR-ODS_ERR sy-vline 
WA_MCH_S_PART_STR-REPAIR_FULL sy-vline 
WA_MCH_S_PART_STR-DELFLAG sy-vline 
WA_MCH_S_PART_STR-TIMESTAMP_ANF sy-vline 
WA_MCH_S_PART_STR-TIMESTAMP_VERB sy-vline 
WA_MCH_S_PART_STR-SOURCE_DTA sy-vline 
WA_MCH_S_PART_STR-SOURCE_DTA_TYPE sy-vline 
WA_MCH_S_PART_STR-S_DTA_TXT sy-vline 
WA_MCH_S_PART_STR-S_DTA_TYPE_TXT sy-vline 
WA_MCH_S_PART_STR-SDEL sy-vline 
WA_MCH_S_PART_STR-SDEL_RECORDS sy-vline 
WA_MCH_S_PART_STR-ARCHIVED sy-vline 
WA_MCH_S_PART_STR-DM_FLAG_OUT sy-vline 
WA_MCH_S_PART_STR-TS_ENTRY_MADE sy-vline 
WA_MCH_S_PART_STR-ARCHIVFLAG sy-vline 
WA_MCH_S_PART_STR-ACTPROT sy-vline 
WA_MCH_S_PART_STR-LINESREADLONG sy-vline 
WA_MCH_S_PART_STR-LINESTRANSFERREDLONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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