ABAP Select data from SAP table CSEQS_S_COMP_ALLOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CSEQS_S_COMP_ALLOC
*  INTO TABLE @DATA(IT_CSEQS_S_COMP_ALLOC2).
*--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_CSEQS_S_COMP_ALLOC INDEX 1 INTO DATA(WA_CSEQS_S_COMP_ALLOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CSEQS_S_COMP_ALLOC>-PARENT_NODE = 1.
<CSEQS_S_COMP_ALLOC>-WERKS = 1.
<CSEQS_S_COMP_ALLOC>-PLNNR = 1.
<CSEQS_S_COMP_ALLOC>-STLNR = 1.
<CSEQS_S_COMP_ALLOC>-STLAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CSEQS_S_COMP_ALLOC-POSNR, sy-vline,
  WA_CSEQS_S_COMP_ALLOC-IDNRK, sy-vline,
  WA_CSEQS_S_COMP_ALLOC-MENGE, sy-vline,
  WA_CSEQS_S_COMP_ALLOC-MEINS, sy-vline,
  WA_CSEQS_S_COMP_ALLOC-POSTP, sy-vline,
  WA_CSEQS_S_COMP_ALLOC-PLNFL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CSEQS_S_COMP_ALLOC 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_CSEQS_S_COMP_ALLOC 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_CSEQS_S_COMP_ALLOC INTO WA_CSEQS_S_COMP_ALLOC.


*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 MATN1, internal->external for field PARENT_NODE
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CSEQS_S_COMP_ALLOC-PARENT_NODE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSEQS_S_COMP_ALLOC-PARENT_NODE.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field STLNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_CSEQS_S_COMP_ALLOC-STLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSEQS_S_COMP_ALLOC-STLNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field POSNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_CSEQS_S_COMP_ALLOC-POSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSEQS_S_COMP_ALLOC-POSNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field IDNRK
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CSEQS_S_COMP_ALLOC-IDNRK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSEQS_S_COMP_ALLOC-IDNRK.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_CSEQS_S_COMP_ALLOC-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSEQS_S_COMP_ALLOC-VORNR.
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_CSEQS_S_COMP_ALLOC_STR, 
PARENT_NODE TYPE STRING,
WERKS TYPE STRING,
PLNNR TYPE STRING,
STLNR TYPE STRING,
STLAL TYPE STRING,
POSNR TYPE STRING,
IDNRK TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
POSTP TYPE STRING,
PLNFL TYPE STRING,
VORNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CSEQS_S_COMP_ALLOC_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_CSEQS_S_COMP_ALLOC_STR-PARENT_NODE sy-vline 
WA_CSEQS_S_COMP_ALLOC_STR-WERKS sy-vline 
WA_CSEQS_S_COMP_ALLOC_STR-PLNNR sy-vline 
WA_CSEQS_S_COMP_ALLOC_STR-STLNR sy-vline 
WA_CSEQS_S_COMP_ALLOC_STR-STLAL sy-vline 
WA_CSEQS_S_COMP_ALLOC_STR-POSNR sy-vline 
WA_CSEQS_S_COMP_ALLOC_STR-IDNRK sy-vline 
WA_CSEQS_S_COMP_ALLOC_STR-MENGE sy-vline 
WA_CSEQS_S_COMP_ALLOC_STR-MEINS sy-vline 
WA_CSEQS_S_COMP_ALLOC_STR-POSTP sy-vline 
WA_CSEQS_S_COMP_ALLOC_STR-PLNFL sy-vline 
WA_CSEQS_S_COMP_ALLOC_STR-VORNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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