ABAP Select data from SAP table /ISDFPS/MHIO into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /ISDFPS/MHIO 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 /ISDFPS/MHIO. 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 /ISDFPS/MHIO 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_/ISDFPS/MHIO TYPE STANDARD TABLE OF /ISDFPS/MHIO,
      WA_/ISDFPS/MHIO TYPE /ISDFPS/MHIO,
      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: </ISDFPS/MHIO> TYPE /ISDFPS/MHIO.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /ISDFPS/MHIO
  INTO TABLE IT_/ISDFPS/MHIO.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ISDFPS/MHIO
*  INTO TABLE @DATA(IT_/ISDFPS/MHIO2).
*--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_/ISDFPS/MHIO INDEX 1 INTO DATA(WA_/ISDFPS/MHIO2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/ISDFPS/MHIO ASSIGNING </ISDFPS/MHIO>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ISDFPS/MHIO>-MANDT = 1.
</ISDFPS/MHIO>-WARPL = 1.
</ISDFPS/MHIO>-ABNUM = 1.
</ISDFPS/MHIO>-WPPOS = 1.
</ISDFPS/MHIO>-AUFNR = 1.

ENDLOOP.

LOOP AT IT_/ISDFPS/MHIO INTO WA_/ISDFPS/MHIO.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ISDFPS/MHIO-ADDAT, sy-vline,
  WA_/ISDFPS/MHIO-LBLNI, sy-vline,
  WA_/ISDFPS/MHIO-TSENQ, sy-vline,
  WA_/ISDFPS/MHIO-TSTAT, sy-vline,
  WA_/ISDFPS/MHIO-GSTRP, sy-vline,
  WA_/ISDFPS/MHIO-SORTF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ISDFPS/MHIO 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_/ISDFPS/MHIO 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_/ISDFPS/MHIO INTO WA_/ISDFPS/MHIO.


*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 WARPL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/MHIO-WARPL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/MHIO-WARPL.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field SERVICE_ORDER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/MHIO-SERVICE_ORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/MHIO-SERVICE_ORDER.
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_/ISDFPS/MHIO_STR, 
MANDT TYPE STRING,
WARPL TYPE STRING,
ABNUM TYPE STRING,
WPPOS TYPE STRING,
AUFNR TYPE STRING,
ADDAT TYPE STRING,
LBLNI TYPE STRING,
TSENQ TYPE STRING,
TSTAT TYPE STRING,
GSTRP TYPE STRING,
SORTF TYPE STRING,
QMNUM TYPE STRING,
ADTIME TYPE STRING,
PRUEFLOS TYPE STRING,
USERMOD TYPE STRING,
IND_MPLA_API TYPE STRING,
DEMAND_ID TYPE STRING,
DEMAND_NO TYPE STRING,
REVISION_NO TYPE STRING,
REV_PLANT TYPE STRING,
SERVICE_ORDER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ISDFPS/MHIO_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_/ISDFPS/MHIO_STR-MANDT sy-vline 
WA_/ISDFPS/MHIO_STR-WARPL sy-vline 
WA_/ISDFPS/MHIO_STR-ABNUM sy-vline 
WA_/ISDFPS/MHIO_STR-WPPOS sy-vline 
WA_/ISDFPS/MHIO_STR-AUFNR sy-vline 
WA_/ISDFPS/MHIO_STR-ADDAT sy-vline 
WA_/ISDFPS/MHIO_STR-LBLNI sy-vline 
WA_/ISDFPS/MHIO_STR-TSENQ sy-vline 
WA_/ISDFPS/MHIO_STR-TSTAT sy-vline 
WA_/ISDFPS/MHIO_STR-GSTRP sy-vline 
WA_/ISDFPS/MHIO_STR-SORTF sy-vline 
WA_/ISDFPS/MHIO_STR-QMNUM sy-vline 
WA_/ISDFPS/MHIO_STR-ADTIME sy-vline 
WA_/ISDFPS/MHIO_STR-PRUEFLOS sy-vline 
WA_/ISDFPS/MHIO_STR-USERMOD sy-vline 
WA_/ISDFPS/MHIO_STR-IND_MPLA_API sy-vline 
WA_/ISDFPS/MHIO_STR-DEMAND_ID sy-vline 
WA_/ISDFPS/MHIO_STR-DEMAND_NO sy-vline 
WA_/ISDFPS/MHIO_STR-REVISION_NO sy-vline 
WA_/ISDFPS/MHIO_STR-REV_PLANT sy-vline 
WA_/ISDFPS/MHIO_STR-SERVICE_ORDER sy-vline      INTO ld_text SEPARATED BY SPACE.

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