ABAP Select data from SAP table /SCWM/S_WAVECREATE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_WAVECREATE
*  INTO TABLE @DATA(IT_/SCWM/S_WAVECREATE2).
*--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_/SCWM/S_WAVECREATE INDEX 1 INTO DATA(WA_/SCWM/S_WAVECREATE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_WAVECREATE>-TWHRITEM = 1.
</SCWM/S_WAVECREATE>-RDOCCAT = 1.
</SCWM/S_WAVECREATE>-TMPLT = 1.
</SCWM/S_WAVECREATE>-OPTN = 1.
</SCWM/S_WAVECREATE>-WAVE_TEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/S_WAVECREATE-WAVE_TYPE, sy-vline,
  WA_/SCWM/S_WAVECREATE-WAVE_CAT, sy-vline,
  WA_/SCWM/S_WAVECREATE-RLS_MTHD, sy-vline,
  WA_/SCWM/S_WAVECREATE-WAVE_CALENDAR, sy-vline,
  WA_/SCWM/S_WAVECREATE-CUTOFF_DT, sy-vline,
  WA_/SCWM/S_WAVECREATE-RLS_DT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_WAVECREATE 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_/SCWM/S_WAVECREATE 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_/SCWM/S_WAVECREATE INTO WA_/SCWM/S_WAVECREATE.


*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 ALPH0, internal->external for field TMPLT
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WAVECREATE-TMPLT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WAVECREATE-TMPLT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPH0, internal->external for field OPTN
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WAVECREATE-OPTN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WAVECREATE-OPTN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTWH, internal->external for field CUTOFF_DT
CALL FUNCTION 'CONVERSION_EXIT_TSTWH_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WAVECREATE-CUTOFF_DT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WAVECREATE-CUTOFF_DT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTWH, internal->external for field RLS_DT
CALL FUNCTION 'CONVERSION_EXIT_TSTWH_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WAVECREATE-RLS_DT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WAVECREATE-RLS_DT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTWH, internal->external for field PICK_COMP_DT
CALL FUNCTION 'CONVERSION_EXIT_TSTWH_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WAVECREATE-PICK_COMP_DT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WAVECREATE-PICK_COMP_DT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTWH, internal->external for field PACK_COMP_DT
CALL FUNCTION 'CONVERSION_EXIT_TSTWH_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WAVECREATE-PACK_COMP_DT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WAVECREATE-PACK_COMP_DT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTWH, internal->external for field STAG_COMP_DT
CALL FUNCTION 'CONVERSION_EXIT_TSTWH_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WAVECREATE-STAG_COMP_DT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WAVECREATE-STAG_COMP_DT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTWH, internal->external for field LOAD_COMP_DT
CALL FUNCTION 'CONVERSION_EXIT_TSTWH_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WAVECREATE-LOAD_COMP_DT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WAVECREATE-LOAD_COMP_DT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field CUTOFF_DT_WH
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WAVECREATE-CUTOFF_DT_WH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WAVECREATE-CUTOFF_DT_WH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field RLS_DT_WH
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WAVECREATE-RLS_DT_WH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WAVECREATE-RLS_DT_WH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field PICK_COMP_DT_WH
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WAVECREATE-PICK_COMP_DT_WH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WAVECREATE-PICK_COMP_DT_WH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field PACK_COMP_DT_WH
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WAVECREATE-PACK_COMP_DT_WH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WAVECREATE-PACK_COMP_DT_WH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field STAG_COMP_DT_WH
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WAVECREATE-STAG_COMP_DT_WH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WAVECREATE-STAG_COMP_DT_WH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field LOAD_COMP_DT_WH
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WAVECREATE-LOAD_COMP_DT_WH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WAVECREATE-LOAD_COMP_DT_WH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field RELEASED_AT_WH
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WAVECREATE-RELEASED_AT_WH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WAVECREATE-RELEASED_AT_WH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTWH, internal->external for field PICK_START_DT
CALL FUNCTION 'CONVERSION_EXIT_TSTWH_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WAVECREATE-PICK_START_DT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WAVECREATE-PICK_START_DT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTWH, internal->external for field PACK_START_DT
CALL FUNCTION 'CONVERSION_EXIT_TSTWH_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_WAVECREATE-PACK_START_DT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_WAVECREATE-PACK_START_DT.
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_/SCWM/S_WAVECREATE_STR, 
TWHRITEM TYPE STRING,
RDOCCAT TYPE STRING,
TMPLT TYPE STRING,
OPTN TYPE STRING,
WAVE_TEXT TYPE STRING,
WAVE_TYPE TYPE STRING,
WAVE_CAT TYPE STRING,
RLS_MTHD TYPE STRING,
WAVE_CALENDAR TYPE STRING,
CUTOFF_DT TYPE STRING,
RLS_DT TYPE STRING,
PICK_COMP_DT TYPE STRING,
PACK_COMP_DT TYPE STRING,
STAG_COMP_DT TYPE STRING,
LOAD_COMP_DT TYPE STRING,
L2SKR TYPE STRING,
LMODE TYPE STRING,
STAREAGR TYPE STRING,
STAREA TYPE STRING,
SATIND TYPE STRING,
WAVE_ASSIGN_REL TYPE STRING,
WAVE_CAPA TYPE STRING,
BIND_PROCESS TYPE STRING,
CUTOFF_DT_WH TYPE STRING,
RLS_DT_WH TYPE STRING,
PICK_COMP_DT_WH TYPE STRING,
PACK_COMP_DT_WH TYPE STRING,
STAG_COMP_DT_WH TYPE STRING,
LOAD_COMP_DT_WH TYPE STRING,
RELEASED_AT_WH TYPE STRING,
PICK_START_DT TYPE STRING,
PACK_START_DT TYPE STRING,
LINE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_WAVECREATE_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_/SCWM/S_WAVECREATE_STR-TWHRITEM sy-vline 
WA_/SCWM/S_WAVECREATE_STR-RDOCCAT sy-vline 
WA_/SCWM/S_WAVECREATE_STR-TMPLT sy-vline 
WA_/SCWM/S_WAVECREATE_STR-OPTN sy-vline 
WA_/SCWM/S_WAVECREATE_STR-WAVE_TEXT sy-vline 
WA_/SCWM/S_WAVECREATE_STR-WAVE_TYPE sy-vline 
WA_/SCWM/S_WAVECREATE_STR-WAVE_CAT sy-vline 
WA_/SCWM/S_WAVECREATE_STR-RLS_MTHD sy-vline 
WA_/SCWM/S_WAVECREATE_STR-WAVE_CALENDAR sy-vline 
WA_/SCWM/S_WAVECREATE_STR-CUTOFF_DT sy-vline 
WA_/SCWM/S_WAVECREATE_STR-RLS_DT sy-vline 
WA_/SCWM/S_WAVECREATE_STR-PICK_COMP_DT sy-vline 
WA_/SCWM/S_WAVECREATE_STR-PACK_COMP_DT sy-vline 
WA_/SCWM/S_WAVECREATE_STR-STAG_COMP_DT sy-vline 
WA_/SCWM/S_WAVECREATE_STR-LOAD_COMP_DT sy-vline 
WA_/SCWM/S_WAVECREATE_STR-L2SKR sy-vline 
WA_/SCWM/S_WAVECREATE_STR-LMODE sy-vline 
WA_/SCWM/S_WAVECREATE_STR-STAREAGR sy-vline 
WA_/SCWM/S_WAVECREATE_STR-STAREA sy-vline 
WA_/SCWM/S_WAVECREATE_STR-SATIND sy-vline 
WA_/SCWM/S_WAVECREATE_STR-WAVE_ASSIGN_REL sy-vline 
WA_/SCWM/S_WAVECREATE_STR-WAVE_CAPA sy-vline 
WA_/SCWM/S_WAVECREATE_STR-BIND_PROCESS sy-vline 
WA_/SCWM/S_WAVECREATE_STR-CUTOFF_DT_WH sy-vline 
WA_/SCWM/S_WAVECREATE_STR-RLS_DT_WH sy-vline 
WA_/SCWM/S_WAVECREATE_STR-PICK_COMP_DT_WH sy-vline 
WA_/SCWM/S_WAVECREATE_STR-PACK_COMP_DT_WH sy-vline 
WA_/SCWM/S_WAVECREATE_STR-STAG_COMP_DT_WH sy-vline 
WA_/SCWM/S_WAVECREATE_STR-LOAD_COMP_DT_WH sy-vline 
WA_/SCWM/S_WAVECREATE_STR-RELEASED_AT_WH sy-vline 
WA_/SCWM/S_WAVECREATE_STR-PICK_START_DT sy-vline 
WA_/SCWM/S_WAVECREATE_STR-PACK_START_DT sy-vline 
WA_/SCWM/S_WAVECREATE_STR-LINE sy-vline      INTO ld_text SEPARATED BY SPACE.

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