ABAP Select data from SAP table IEWMWAVEH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEWMWAVEH
*  INTO TABLE @DATA(IT_IEWMWAVEH2).
*--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_IEWMWAVEH INDEX 1 INTO DATA(WA_IEWMWAVEH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEWMWAVEH>-MANDT = 1.
<IEWMWAVEH>-WAREHOUSE = 1.
<IEWMWAVEH>-WAVE = 1.
<IEWMWAVEH>-REFERENCEDOCUMENTCATEGORY = 1.
<IEWMWAVEH>-WAVETEMPLATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IEWMWAVEH-WAVENAME, sy-vline,
  WA_IEWMWAVEH-WAVETYPE, sy-vline,
  WA_IEWMWAVEH-WAVECATEGORY, sy-vline,
  WA_IEWMWAVEH-WAVERELEASEMETHOD, sy-vline,
  WA_IEWMWAVEH-WAVECUTOFFUTCDATETIME, sy-vline,
  WA_IEWMWAVEH-PLNDWAVERELEASEUTCDATETIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IEWMWAVEH 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_IEWMWAVEH 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_IEWMWAVEH INTO WA_IEWMWAVEH.


*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_IEWMWAVEH_STR, 
MANDT TYPE STRING,
WAREHOUSE TYPE STRING,
WAVE TYPE STRING,
REFERENCEDOCUMENTCATEGORY TYPE STRING,
WAVETEMPLATE TYPE STRING,
WAVENAME TYPE STRING,
WAVETYPE TYPE STRING,
WAVECATEGORY TYPE STRING,
WAVERELEASEMETHOD TYPE STRING,
WAVECUTOFFUTCDATETIME TYPE STRING,
PLNDWAVERELEASEUTCDATETIME TYPE STRING,
PLNDPICKCOMPLTNUTCDATETIME TYPE STRING,
PLNDPACKCOMPLETIONUTCDATETIME TYPE STRING,
PLNDSTAGINGCOMPLTNUTCDATETIME TYPE STRING,
PLNDLOADCOMPLETIONUTCDATETIME TYPE STRING,
WAVEASSGMTISPOSSIBLEAFTWAVEREL TYPE STRING,
WAVECAPACITYPROFILE TYPE STRING,
BEHAVIOURDURINGPICKDENIAL TYPE STRING,
WAVECUTOFFWHSETMZNDATETIME TYPE STRING,
WAVEPLNDRELWHSETMZNDATETIME TYPE STRING,
PLNDPICKCMPLTWHSETMZNDATETIME TYPE STRING,
PLNDPACKCMPLTWHSETMZNDATETIME TYPE STRING,
PLNDSTGGCMPLTWHSETMZNDATETIME TYPE STRING,
WAVECOMPLETIONWHSETMZNDATETIME TYPE STRING,
WAVEACTUALRELDWHSETMZNDATETIME TYPE STRING,
WAVEISRELEASEDMANUALLY TYPE STRING,
WAVESTATUS TYPE STRING,
WAVEACTLRELEASEDUTCDATETIME TYPE STRING,
WAVETEMPLATEOPTION TYPE STRING,
WAVEFACTORYCALENDAR TYPE STRING,
WHSETSKISRLVTFORTWOSTPPICKING TYPE STRING,
WAVEWAREHOUSETASKCREATIONMODE TYPE STRING,
STORAGETYPE TYPE STRING,
STORAGESECTION TYPE STRING,
SPCLACTYCATINWHSE TYPE STRING,
RELEASEDBYUSER TYPE STRING,
TWOSTEPPICKINGDEPENDENCY TYPE STRING,
MAXIMUMNUMBEROFWAVEITEMS TYPE STRING,
WAVESIMULATIONSTATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEWMWAVEH_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_IEWMWAVEH_STR-MANDT sy-vline 
WA_IEWMWAVEH_STR-WAREHOUSE sy-vline 
WA_IEWMWAVEH_STR-WAVE sy-vline 
WA_IEWMWAVEH_STR-REFERENCEDOCUMENTCATEGORY sy-vline 
WA_IEWMWAVEH_STR-WAVETEMPLATE sy-vline 
WA_IEWMWAVEH_STR-WAVENAME sy-vline 
WA_IEWMWAVEH_STR-WAVETYPE sy-vline 
WA_IEWMWAVEH_STR-WAVECATEGORY sy-vline 
WA_IEWMWAVEH_STR-WAVERELEASEMETHOD sy-vline 
WA_IEWMWAVEH_STR-WAVECUTOFFUTCDATETIME sy-vline 
WA_IEWMWAVEH_STR-PLNDWAVERELEASEUTCDATETIME sy-vline 
WA_IEWMWAVEH_STR-PLNDPICKCOMPLTNUTCDATETIME sy-vline 
WA_IEWMWAVEH_STR-PLNDPACKCOMPLETIONUTCDATETIME sy-vline 
WA_IEWMWAVEH_STR-PLNDSTAGINGCOMPLTNUTCDATETIME sy-vline 
WA_IEWMWAVEH_STR-PLNDLOADCOMPLETIONUTCDATETIME sy-vline 
WA_IEWMWAVEH_STR-WAVEASSGMTISPOSSIBLEAFTWAVEREL sy-vline 
WA_IEWMWAVEH_STR-WAVECAPACITYPROFILE sy-vline 
WA_IEWMWAVEH_STR-BEHAVIOURDURINGPICKDENIAL sy-vline 
WA_IEWMWAVEH_STR-WAVECUTOFFWHSETMZNDATETIME sy-vline 
WA_IEWMWAVEH_STR-WAVEPLNDRELWHSETMZNDATETIME sy-vline 
WA_IEWMWAVEH_STR-PLNDPICKCMPLTWHSETMZNDATETIME sy-vline 
WA_IEWMWAVEH_STR-PLNDPACKCMPLTWHSETMZNDATETIME sy-vline 
WA_IEWMWAVEH_STR-PLNDSTGGCMPLTWHSETMZNDATETIME sy-vline 
WA_IEWMWAVEH_STR-WAVECOMPLETIONWHSETMZNDATETIME sy-vline 
WA_IEWMWAVEH_STR-WAVEACTUALRELDWHSETMZNDATETIME sy-vline 
WA_IEWMWAVEH_STR-WAVEISRELEASEDMANUALLY sy-vline 
WA_IEWMWAVEH_STR-WAVESTATUS sy-vline 
WA_IEWMWAVEH_STR-WAVEACTLRELEASEDUTCDATETIME sy-vline 
WA_IEWMWAVEH_STR-WAVETEMPLATEOPTION sy-vline 
WA_IEWMWAVEH_STR-WAVEFACTORYCALENDAR sy-vline 
WA_IEWMWAVEH_STR-WHSETSKISRLVTFORTWOSTPPICKING sy-vline 
WA_IEWMWAVEH_STR-WAVEWAREHOUSETASKCREATIONMODE sy-vline 
WA_IEWMWAVEH_STR-STORAGETYPE sy-vline 
WA_IEWMWAVEH_STR-STORAGESECTION sy-vline 
WA_IEWMWAVEH_STR-SPCLACTYCATINWHSE sy-vline 
WA_IEWMWAVEH_STR-RELEASEDBYUSER sy-vline 
WA_IEWMWAVEH_STR-TWOSTEPPICKINGDEPENDENCY sy-vline 
WA_IEWMWAVEH_STR-MAXIMUMNUMBEROFWAVEITEMS sy-vline 
WA_IEWMWAVEH_STR-WAVESIMULATIONSTATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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