ABAP Select data from SAP table /SAPAPO/DM_MATLWHST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/DM_MATLWHST
*  INTO TABLE @DATA(IT_/SAPAPO/DM_MATLWHST2).
*--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_/SAPAPO/DM_MATLWHST INDEX 1 INTO DATA(WA_/SAPAPO/DM_MATLWHST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/DM_MATLWHST>-MATID = 1.
</SAPAPO/DM_MATLWHST>-SCUGUID = 1.
</SAPAPO/DM_MATLWHST>-ENTITLED_ID = 1.
</SAPAPO/DM_MATLWHST>-LGTYP = 1.
</SAPAPO/DM_MATLWHST>-SECTIND = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/DM_MATLWHST-SECTIND_FIX, sy-vline,
  WA_/SAPAPO/DM_MATLWHST-SECTIND_PLAN, sy-vline,
  WA_/SAPAPO/DM_MATLWHST-BINTYPE, sy-vline,
  WA_/SAPAPO/DM_MATLWHST-BINTYPE_FIX, sy-vline,
  WA_/SAPAPO/DM_MATLWHST-BINTYPE_PLAN, sy-vline,
  WA_/SAPAPO/DM_MATLWHST-MAXFIXBIN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/DM_MATLWHST 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_/SAPAPO/DM_MATLWHST 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_/SAPAPO/DM_MATLWHST INTO WA_/SAPAPO/DM_MATLWHST.


*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 CUNIT, internal->external for field MAXQTY_UOM_DSP
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/DM_MATLWHST-MAXQTY_UOM_DSP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/DM_MATLWHST-MAXQTY_UOM_DSP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MINQTY_UOM_DSP
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/DM_MATLWHST-MINQTY_UOM_DSP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/DM_MATLWHST-MINQTY_UOM_DSP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field REPQTY_UOM_DSP
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/DM_MATLWHST-REPQTY_UOM_DSP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/DM_MATLWHST-REPQTY_UOM_DSP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTLC, internal->external for field CREATEUTC
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/DM_MATLWHST-CREATEUTC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/DM_MATLWHST-CREATEUTC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTLC, internal->external for field CHANGEUTC
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/DM_MATLWHST-CHANGEUTC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/DM_MATLWHST-CHANGEUTC.
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_/SAPAPO/DM_MATLWHST_STR, 
MATID TYPE STRING,
SCUGUID TYPE STRING,
ENTITLED_ID TYPE STRING,
LGTYP TYPE STRING,
SECTIND TYPE STRING,
SECTIND_FIX TYPE STRING,
SECTIND_PLAN TYPE STRING,
BINTYPE TYPE STRING,
BINTYPE_FIX TYPE STRING,
BINTYPE_PLAN TYPE STRING,
MAXFIXBIN TYPE STRING,
MAXFIXBIN_FIX TYPE STRING,
MAXFIXBIN_PLAN TYPE STRING,
MAXQTY TYPE STRING,
MAXQTY_PLAN TYPE STRING,
MAXQTY_UOM_DSP TYPE STRING,
MINQTY TYPE STRING,
MINQTY_PLAN TYPE STRING,
MINQTY_UOM_DSP TYPE STRING,
REPQTY TYPE STRING,
REPQTY_PLAN TYPE STRING,
REPQTY_UOM_DSP TYPE STRING,
RMMQTY_FIX TYPE STRING,
PERMXQTY TYPE STRING,
SPLITTH TYPE STRING,
SPLITPUT TYPE STRING,
NORPLN TYPE STRING,
BINSRCH TYPE STRING,
QUANCLA TYPE STRING,
QUANCLAPUT TYPE STRING,
SEQPUT TYPE STRING,
SEQPUT_FIX TYPE STRING,
SEQPUT_PLAN TYPE STRING,
SKIPPTW TYPE STRING,
SKIPPTW_FIX TYPE STRING,
SKIPPTW_PLAN TYPE STRING,
DOCBATCH TYPE STRING,
DUMMY_WHST_INCL_EEW_PS TYPE STRING,
CREATEUSER TYPE STRING,
CREATEUTC TYPE STRING,
CHANGEUSER TYPE STRING,
CHANGEUTC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/DM_MATLWHST_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_/SAPAPO/DM_MATLWHST_STR-MATID sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-SCUGUID sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-ENTITLED_ID sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-LGTYP sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-SECTIND sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-SECTIND_FIX sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-SECTIND_PLAN sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-BINTYPE sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-BINTYPE_FIX sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-BINTYPE_PLAN sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-MAXFIXBIN sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-MAXFIXBIN_FIX sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-MAXFIXBIN_PLAN sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-MAXQTY sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-MAXQTY_PLAN sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-MAXQTY_UOM_DSP sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-MINQTY sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-MINQTY_PLAN sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-MINQTY_UOM_DSP sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-REPQTY sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-REPQTY_PLAN sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-REPQTY_UOM_DSP sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-RMMQTY_FIX sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-PERMXQTY sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-SPLITTH sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-SPLITPUT sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-NORPLN sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-BINSRCH sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-QUANCLA sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-QUANCLAPUT sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-SEQPUT sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-SEQPUT_FIX sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-SEQPUT_PLAN sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-SKIPPTW sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-SKIPPTW_FIX sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-SKIPPTW_PLAN sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-DOCBATCH sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-DUMMY_WHST_INCL_EEW_PS sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-CREATEUSER sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-CREATEUTC sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-CHANGEUSER sy-vline 
WA_/SAPAPO/DM_MATLWHST_STR-CHANGEUTC sy-vline      INTO ld_text SEPARATED BY SPACE.

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