ABAP Select data from SAP table EHEWAW_WA_MAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHEWAW_WA_MAT
*  INTO TABLE @DATA(IT_EHEWAW_WA_MAT2).
*--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_EHEWAW_WA_MAT INDEX 1 INTO DATA(WA_EHEWAW_WA_MAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHEWAW_WA_MAT>-MANDT = 1.
<EHEWAW_WA_MAT>-ENVRMTWASTEPARTMATLASSGMTUUID = 1.
<EHEWAW_WA_MAT>-ENVRMTWASTEPARTNERUUID = 1.
<EHEWAW_WA_MAT>-CHMLCMPLNCINFOUUID = 1.
<EHEWAW_WA_MAT>-ENVRMTWASTEPARTDSPLFCLTYUUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHEWAW_WA_MAT-ENVRMTWASTEMGMTMETHCODE, sy-vline,
  WA_EHEWAW_WA_MAT-CREATIONUTCDATETIME, sy-vline,
  WA_EHEWAW_WA_MAT-CREATEDBYUSER, sy-vline,
  WA_EHEWAW_WA_MAT-LASTCHANGEUTCDATETIME, sy-vline,
  WA_EHEWAW_WA_MAT-LASTCHANGEDBYUSER, sy-vline,
  WA_EHEWAW_WA_MAT-ACTIVEUUID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHEWAW_WA_MAT 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_EHEWAW_WA_MAT 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_EHEWAW_WA_MAT INTO WA_EHEWAW_WA_MAT.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_EHEWAW_WA_MAT_STR, 
MANDT TYPE STRING,
ENVRMTWASTEPARTMATLASSGMTUUID TYPE STRING,
ENVRMTWASTEPARTNERUUID TYPE STRING,
CHMLCMPLNCINFOUUID TYPE STRING,
ENVRMTWASTEPARTDSPLFCLTYUUID TYPE STRING,
ENVRMTWASTEMGMTMETHCODE TYPE STRING,
CREATIONUTCDATETIME TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEUTCDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
ACTIVEUUID TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYCONSISTENCYSTATUS TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,
DUMMY_EHEWA_MAT_INCL_EEW_PS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHEWAW_WA_MAT_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_EHEWAW_WA_MAT_STR-MANDT sy-vline 
WA_EHEWAW_WA_MAT_STR-ENVRMTWASTEPARTMATLASSGMTUUID sy-vline 
WA_EHEWAW_WA_MAT_STR-ENVRMTWASTEPARTNERUUID sy-vline 
WA_EHEWAW_WA_MAT_STR-CHMLCMPLNCINFOUUID sy-vline 
WA_EHEWAW_WA_MAT_STR-ENVRMTWASTEPARTDSPLFCLTYUUID sy-vline 
WA_EHEWAW_WA_MAT_STR-ENVRMTWASTEMGMTMETHCODE sy-vline 
WA_EHEWAW_WA_MAT_STR-CREATIONUTCDATETIME sy-vline 
WA_EHEWAW_WA_MAT_STR-CREATEDBYUSER sy-vline 
WA_EHEWAW_WA_MAT_STR-LASTCHANGEUTCDATETIME sy-vline 
WA_EHEWAW_WA_MAT_STR-LASTCHANGEDBYUSER sy-vline 
WA_EHEWAW_WA_MAT_STR-ACTIVEUUID sy-vline 
WA_EHEWAW_WA_MAT_STR-HASACTIVEENTITY sy-vline 
WA_EHEWAW_WA_MAT_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_EHEWAW_WA_MAT_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_EHEWAW_WA_MAT_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_EHEWAW_WA_MAT_STR-DRAFTENTITYCONSISTENCYSTATUS sy-vline 
WA_EHEWAW_WA_MAT_STR-DRAFTENTITYOPERATIONCODE sy-vline 
WA_EHEWAW_WA_MAT_STR-DUMMY_EHEWA_MAT_INCL_EEW_PS sy-vline      INTO ld_text SEPARATED BY SPACE.

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