ABAP Select data from SAP table MPLAN_MHIO into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MPLAN_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 MPLAN_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 MPLAN_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_MPLAN_MHIO TYPE STANDARD TABLE OF MPLAN_MHIO,
      WA_MPLAN_MHIO TYPE MPLAN_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: <MPLAN_MHIO> TYPE MPLAN_MHIO.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MPLAN_MHIO
*  INTO TABLE @DATA(IT_MPLAN_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_MPLAN_MHIO INDEX 1 INTO DATA(WA_MPLAN_MHIO2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MPLAN_MHIO-ADDAT, sy-vline,
  WA_MPLAN_MHIO-LBLNI, sy-vline,
  WA_MPLAN_MHIO-TSENQ, sy-vline,
  WA_MPLAN_MHIO-TSTAT, sy-vline,
  WA_MPLAN_MHIO-GSTRP, sy-vline,
  WA_MPLAN_MHIO-SORTF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MPLAN_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_MPLAN_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_MPLAN_MHIO INTO WA_MPLAN_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_MPLAN_MHIO-WARPL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPLAN_MHIO-WARPL.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field PRUEFLOS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MPLAN_MHIO-PRUEFLOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPLAN_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_MPLAN_MHIO-SERVICE_ORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPLAN_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_MPLAN_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_MPLAN_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_MPLAN_MHIO_STR-MANDT sy-vline 
WA_MPLAN_MHIO_STR-WARPL sy-vline 
WA_MPLAN_MHIO_STR-ABNUM sy-vline 
WA_MPLAN_MHIO_STR-WPPOS sy-vline 
WA_MPLAN_MHIO_STR-AUFNR sy-vline 
WA_MPLAN_MHIO_STR-ADDAT sy-vline 
WA_MPLAN_MHIO_STR-LBLNI sy-vline 
WA_MPLAN_MHIO_STR-TSENQ sy-vline 
WA_MPLAN_MHIO_STR-TSTAT sy-vline 
WA_MPLAN_MHIO_STR-GSTRP sy-vline 
WA_MPLAN_MHIO_STR-SORTF sy-vline 
WA_MPLAN_MHIO_STR-QMNUM sy-vline 
WA_MPLAN_MHIO_STR-ADTIME sy-vline 
WA_MPLAN_MHIO_STR-PRUEFLOS sy-vline 
WA_MPLAN_MHIO_STR-USERMOD sy-vline 
WA_MPLAN_MHIO_STR-IND_MPLA_API sy-vline 
WA_MPLAN_MHIO_STR-DEMAND_ID sy-vline 
WA_MPLAN_MHIO_STR-DEMAND_NO sy-vline 
WA_MPLAN_MHIO_STR-REVISION_NO sy-vline 
WA_MPLAN_MHIO_STR-REV_PLANT sy-vline 
WA_MPLAN_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.