ABAP Select data from SAP table /TDAG/CPS_WWI_COMP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /TDAG/CPS_WWI_COMP
*  INTO TABLE @DATA(IT_/TDAG/CPS_WWI_COMP2).
*--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_/TDAG/CPS_WWI_COMP INDEX 1 INTO DATA(WA_/TDAG/CPS_WWI_COMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</TDAG/CPS_WWI_COMP>-RECN = 1.
</TDAG/CPS_WWI_COMP>-KEY = 1.
</TDAG/CPS_WWI_COMP>-KEYROOT = 1.
</TDAG/CPS_WWI_COMP>-SUBID = 1.
</TDAG/CPS_WWI_COMP>-MATCAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/TDAG/CPS_WWI_COMP-SUBCAT, sy-vline,
  WA_/TDAG/CPS_WWI_COMP-LEVEL, sy-vline,
  WA_/TDAG/CPS_WWI_COMP-HOMO_RECN, sy-vline,
  WA_/TDAG/CPS_WWI_COMP-HOMO_SUBID, sy-vline,
  WA_/TDAG/CPS_WWI_COMP-HOMO_IDENT1, sy-vline,
  WA_/TDAG/CPS_WWI_COMP-HOMO_IDENT2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/TDAG/CPS_WWI_COMP 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_/TDAG/CPS_WWI_COMP 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_/TDAG/CPS_WWI_COMP INTO WA_/TDAG/CPS_WWI_COMP.


*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 RECN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_WWI_COMP-RECN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_WWI_COMP-RECN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SPEC1, internal->external for field SUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_WWI_COMP-SUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_WWI_COMP-SUBID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit SPEC1, internal->external for field HOMO_SUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_WWI_COMP-HOMO_SUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_WWI_COMP-HOMO_SUBID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit SPEC1, internal->external for field MAT_SUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_WWI_COMP-MAT_SUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_WWI_COMP-MAT_SUBID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit SPEC1, internal->external for field PURE_SUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_WWI_COMP-PURE_SUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_WWI_COMP-PURE_SUBID.
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_/TDAG/CPS_WWI_COMP_STR, 
RECN TYPE STRING,
KEY TYPE STRING,
KEYROOT TYPE STRING,
SUBID TYPE STRING,
MATCAT TYPE STRING,
SUBCAT TYPE STRING,
LEVEL TYPE STRING,
HOMO_RECN TYPE STRING,
HOMO_SUBID TYPE STRING,
HOMO_IDENT1 TYPE STRING,
HOMO_IDENT2 TYPE STRING,
MAT_RECN TYPE STRING,
MAT_SUBID TYPE STRING,
MAT_IDENT1 TYPE STRING,
MAT_IDENT2 TYPE STRING,
PURE_RECN TYPE STRING,
PURE_SUBID TYPE STRING,
PURE_IDENT1 TYPE STRING,
PURE_IDENT2 TYPE STRING,
PROP_LOW TYPE STRING,
PROP_AVG TYPE STRING,
PROP_UPP TYPE STRING,
PROP_UNIT TYPE STRING,
MASS_LOW TYPE STRING,
MASS_AVG TYPE STRING,
MASS_UPP TYPE STRING,
HOM_PROP_LOW TYPE STRING,
HOM_PROP_AVG TYPE STRING,
HOM_PROP_UPP TYPE STRING,
HOM_MASS_LOW TYPE STRING,
HOM_MASS_AVG TYPE STRING,
HOM_MASS_UPP TYPE STRING,
MASS_UNIT TYPE STRING,
CHECKRES TYPE STRING,
PROHIBIT TYPE STRING,
THRESHOLD TYPE STRING,
COMPLIANT TYPE STRING,
DECLARABLE TYPE STRING,
EXEMPTION TYPE STRING,
EXEMPTIONPHR TYPE STRING,
ALTERNATIVE TYPE STRING,
ACTIVE TYPE STRING,
PLANT TYPE STRING,
CLASS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/TDAG/CPS_WWI_COMP_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_/TDAG/CPS_WWI_COMP_STR-RECN sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-KEY sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-KEYROOT sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-SUBID sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-MATCAT sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-SUBCAT sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-LEVEL sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-HOMO_RECN sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-HOMO_SUBID sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-HOMO_IDENT1 sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-HOMO_IDENT2 sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-MAT_RECN sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-MAT_SUBID sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-MAT_IDENT1 sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-MAT_IDENT2 sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-PURE_RECN sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-PURE_SUBID sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-PURE_IDENT1 sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-PURE_IDENT2 sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-PROP_LOW sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-PROP_AVG sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-PROP_UPP sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-PROP_UNIT sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-MASS_LOW sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-MASS_AVG sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-MASS_UPP sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-HOM_PROP_LOW sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-HOM_PROP_AVG sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-HOM_PROP_UPP sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-HOM_MASS_LOW sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-HOM_MASS_AVG sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-HOM_MASS_UPP sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-MASS_UNIT sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-CHECKRES sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-PROHIBIT sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-THRESHOLD sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-COMPLIANT sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-DECLARABLE sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-EXEMPTION sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-EXEMPTIONPHR sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-ALTERNATIVE sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-ACTIVE sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-PLANT sy-vline 
WA_/TDAG/CPS_WWI_COMP_STR-CLASS sy-vline      INTO ld_text SEPARATED BY SPACE.

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