ABAP Select data from SAP table EHSWAV_MN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHSWAV_MN
*  INTO TABLE @DATA(IT_EHSWAV_MN2).
*--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_EHSWAV_MN INDEX 1 INTO DATA(WA_EHSWAV_MN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHSWAV_MN>-MANDT = 1.
<EHSWAV_MN>-RECN = 1.
<EHSWAV_MN>-DELFLG = 1.
<EHSWAV_MN>-PARKFLG = 1.
<EHSWAV_MN>-CRDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHSWAV_MN-CRNAM, sy-vline,
  WA_EHSWAV_MN-UPDDAT, sy-vline,
  WA_EHSWAV_MN-UPDNAM, sy-vline,
  WA_EHSWAV_MN-SRSID, sy-vline,
  WA_EHSWAV_MN-OWNID, sy-vline,
  WA_EHSWAV_MN-RECNROOT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHSWAV_MN 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_EHSWAV_MN 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_EHSWAV_MN INTO WA_EHSWAV_MN.


*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 OWNID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EHSWAV_MN-OWNID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHSWAV_MN-OWNID.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit CUNIT, internal->external for field MNAMEXTOU
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_EHSWAV_MN-MNAMEXTOU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHSWAV_MN-MNAMEXTOU.
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_EHSWAV_MN_STR, 
MANDT TYPE STRING,
RECN TYPE STRING,
DELFLG TYPE STRING,
PARKFLG TYPE STRING,
CRDAT TYPE STRING,
CRNAM TYPE STRING,
UPDDAT TYPE STRING,
UPDNAM TYPE STRING,
SRSID TYPE STRING,
OWNID TYPE STRING,
RECNROOT TYPE STRING,
MNINO TYPE STRING,
MNCAT TYPE STRING,
OBJNR TYPE STRING,
MNSTATUS TYPE STRING,
MNNOCTRY TYPE STRING,
MNNOST TYPE STRING,
MNAPNO TYPE STRING,
MNTXT TYPE STRING,
MNTXT2 TYPE STRING,
MNTXT3 TYPE STRING,
MNTXT4 TYPE STRING,
MNCONTDG TYPE STRING,
MNLWDG1 TYPE STRING,
MNLWDG2 TYPE STRING,
MNLWDG3 TYPE STRING,
MNDATAUTH TYPE STRING,
MNACC TYPE STRING,
MNAMINTO TYPE STRING,
MNAMINTOU TYPE STRING,
MNAMEXTO TYPE STRING,
MNAMEXTOU TYPE STRING,
MNDATEPRN TYPE STRING,
MNARCH TYPE STRING,
MNCAN TYPE STRING,
MNDATREC TYPE STRING,
MNDATEREC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHSWAV_MN_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_EHSWAV_MN_STR-MANDT sy-vline 
WA_EHSWAV_MN_STR-RECN sy-vline 
WA_EHSWAV_MN_STR-DELFLG sy-vline 
WA_EHSWAV_MN_STR-PARKFLG sy-vline 
WA_EHSWAV_MN_STR-CRDAT sy-vline 
WA_EHSWAV_MN_STR-CRNAM sy-vline 
WA_EHSWAV_MN_STR-UPDDAT sy-vline 
WA_EHSWAV_MN_STR-UPDNAM sy-vline 
WA_EHSWAV_MN_STR-SRSID sy-vline 
WA_EHSWAV_MN_STR-OWNID sy-vline 
WA_EHSWAV_MN_STR-RECNROOT sy-vline 
WA_EHSWAV_MN_STR-MNINO sy-vline 
WA_EHSWAV_MN_STR-MNCAT sy-vline 
WA_EHSWAV_MN_STR-OBJNR sy-vline 
WA_EHSWAV_MN_STR-MNSTATUS sy-vline 
WA_EHSWAV_MN_STR-MNNOCTRY sy-vline 
WA_EHSWAV_MN_STR-MNNOST sy-vline 
WA_EHSWAV_MN_STR-MNAPNO sy-vline 
WA_EHSWAV_MN_STR-MNTXT sy-vline 
WA_EHSWAV_MN_STR-MNTXT2 sy-vline 
WA_EHSWAV_MN_STR-MNTXT3 sy-vline 
WA_EHSWAV_MN_STR-MNTXT4 sy-vline 
WA_EHSWAV_MN_STR-MNCONTDG sy-vline 
WA_EHSWAV_MN_STR-MNLWDG1 sy-vline 
WA_EHSWAV_MN_STR-MNLWDG2 sy-vline 
WA_EHSWAV_MN_STR-MNLWDG3 sy-vline 
WA_EHSWAV_MN_STR-MNDATAUTH sy-vline 
WA_EHSWAV_MN_STR-MNACC sy-vline 
WA_EHSWAV_MN_STR-MNAMINTO sy-vline 
WA_EHSWAV_MN_STR-MNAMINTOU sy-vline 
WA_EHSWAV_MN_STR-MNAMEXTO sy-vline 
WA_EHSWAV_MN_STR-MNAMEXTOU sy-vline 
WA_EHSWAV_MN_STR-MNDATEPRN sy-vline 
WA_EHSWAV_MN_STR-MNARCH sy-vline 
WA_EHSWAV_MN_STR-MNCAN sy-vline 
WA_EHSWAV_MN_STR-MNDATREC sy-vline 
WA_EHSWAV_MN_STR-MNDATEREC sy-vline      INTO ld_text SEPARATED BY SPACE.

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