ABAP Select data from SAP table EHSWAS_MNPOS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHSWAS_MNPOS
*  INTO TABLE @DATA(IT_EHSWAS_MNPOS2).
*--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_EHSWAS_MNPOS INDEX 1 INTO DATA(WA_EHSWAS_MNPOS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHSWAS_MNPOS>-MNWAPOS = 1.
<EHSWAS_MNPOS>-MNMATNR = 1.
<EHSWAS_MNPOS>-MNAMIN = 1.
<EHSWAS_MNPOS>-MNAMQIN = 1.
<EHSWAS_MNPOS>-MNAMEX = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHSWAS_MNPOS-MNAMQEX, sy-vline,
  WA_EHSWAS_MNPOS-MNPACNUM, sy-vline,
  WA_EHSWAS_MNPOS-MNPACCAT, sy-vline,
  WA_EHSWAS_MNPOS-MNPOSDGTXT, sy-vline,
  WA_EHSWAS_MNPOS-MNPOSDGFLG, sy-vline,
  WA_EHSWAS_MNPOS-ISHEAD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHSWAS_MNPOS 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_EHSWAS_MNPOS 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_EHSWAS_MNPOS INTO WA_EHSWAS_MNPOS.


*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 MATN1, internal->external for field MNMATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_EHSWAS_MNPOS-MNMATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHSWAS_MNPOS-MNMATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MNAMQEX
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_EHSWAS_MNPOS-MNAMQEX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHSWAS_MNPOS-MNAMQEX.
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_EHSWAS_MNPOS_STR, 
MNWAPOS TYPE STRING,
MNMATNR TYPE STRING,
MNAMIN TYPE STRING,
MNAMQIN TYPE STRING,
MNAMEX TYPE STRING,
MNAMQEX TYPE STRING,
MNPACNUM TYPE STRING,
MNPACCAT TYPE STRING,
MNPOSDGTXT TYPE STRING,
MNPOSDGFLG TYPE STRING,
ISHEAD TYPE STRING,
MNBAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHSWAS_MNPOS_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_EHSWAS_MNPOS_STR-MNWAPOS sy-vline 
WA_EHSWAS_MNPOS_STR-MNMATNR sy-vline 
WA_EHSWAS_MNPOS_STR-MNAMIN sy-vline 
WA_EHSWAS_MNPOS_STR-MNAMQIN sy-vline 
WA_EHSWAS_MNPOS_STR-MNAMEX sy-vline 
WA_EHSWAS_MNPOS_STR-MNAMQEX sy-vline 
WA_EHSWAS_MNPOS_STR-MNPACNUM sy-vline 
WA_EHSWAS_MNPOS_STR-MNPACCAT sy-vline 
WA_EHSWAS_MNPOS_STR-MNPOSDGTXT sy-vline 
WA_EHSWAS_MNPOS_STR-MNPOSDGFLG sy-vline 
WA_EHSWAS_MNPOS_STR-ISHEAD sy-vline 
WA_EHSWAS_MNPOS_STR-MNBAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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