ABAP Select data from SAP table ISPECVAINSTWCOMP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISPECVAINSTWCOMP
*  INTO TABLE @DATA(IT_ISPECVAINSTWCOMP2).
*--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_ISPECVAINSTWCOMP INDEX 1 INTO DATA(WA_ISPECVAINSTWCOMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISPECVAINSTWCOMP>-MANDT = 1.
<ISPECVAINSTWCOMP>-SPECVALASSGMTHDR = 1.
<ISPECVAINSTWCOMP>-SPECVALASSGMT = 1.
<ISPECVAINSTWCOMP>-COMPONENTSPECIFICATIONINTID = 1.
<ISPECVAINSTWCOMP>-SPECVALASSGMTISINHTNCSOURCE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISPECVAINSTWCOMP-SPECIFICATIONINTERNALID, sy-vline,
  WA_ISPECVAINSTWCOMP-INHTDSPECVALASSGMTISTMPCHGD, sy-vline,
  WA_ISPECVAINSTWCOMP-INHTDSPECVALASSGMTISPERMCHGD, sy-vline,
  WA_ISPECVAINSTWCOMP-SPECINHERITANCETEMPLATE, sy-vline,
  WA_ISPECVAINSTWCOMP-SPECVALASSGMTINHERITANCEPARENT, sy-vline,
  WA_ISPECVAINSTWCOMP-SPECVALASSGMTINHERITANCEROOT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISPECVAINSTWCOMP 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_ISPECVAINSTWCOMP 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_ISPECVAINSTWCOMP INTO WA_ISPECVAINSTWCOMP.


*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 SPECVALASSGMTHDR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISPECVAINSTWCOMP-SPECVALASSGMTHDR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISPECVAINSTWCOMP-SPECVALASSGMTHDR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field COMPSPECUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ISPECVAINSTWCOMP-COMPSPECUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISPECVAINSTWCOMP-COMPSPECUNIT.
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_ISPECVAINSTWCOMP_STR, 
MANDT TYPE STRING,
SPECVALASSGMTHDR TYPE STRING,
SPECVALASSGMT TYPE STRING,
COMPONENTSPECIFICATIONINTID TYPE STRING,
SPECVALASSGMTISINHTNCSOURCE TYPE STRING,
SPECIFICATIONINTERNALID TYPE STRING,
INHTDSPECVALASSGMTISTMPCHGD TYPE STRING,
INHTDSPECVALASSGMTISPERMCHGD TYPE STRING,
SPECINHERITANCETEMPLATE TYPE STRING,
SPECVALASSGMTINHERITANCEPARENT TYPE STRING,
SPECVALASSGMTINHERITANCEROOT TYPE STRING,
SPECVALASSGMTROOTSPECINTID TYPE STRING,
SPECVALASSGMTTYPE TYPE STRING,
SPECVALASSGMTCHANGESTATE TYPE STRING,
SPECVALASSGMTSORTSEQUENCE TYPE STRING,
SPECVALASSGMTUNITREFDIMENSION TYPE STRING,
VALUEASSIGNMENTSOURCE TYPE STRING,
SPECIFICATIONRATING TYPE STRING,
SPECIFICATIONVALIDITYAREA TYPE STRING,
COMPSPECCOMPONENTTYPE TYPE STRING,
COMPSPECLOWERLIMITOPERATOR TYPE STRING,
COMPSPECLOWERLIMIT TYPE STRING,
COMPSPECUPPERLIMITOPERATOR TYPE STRING,
COMPSPECUPPERLIMIT TYPE STRING,
COMPSPECQUANTITY TYPE STRING,
COMPSPECUNIT TYPE STRING,
COMPSPECSORTSEQUENCE TYPE STRING,
COMPSPECDECIMALQUANTITY TYPE STRING,
COMPSPECEXCEPTIONCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISPECVAINSTWCOMP_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_ISPECVAINSTWCOMP_STR-MANDT sy-vline 
WA_ISPECVAINSTWCOMP_STR-SPECVALASSGMTHDR sy-vline 
WA_ISPECVAINSTWCOMP_STR-SPECVALASSGMT sy-vline 
WA_ISPECVAINSTWCOMP_STR-COMPONENTSPECIFICATIONINTID sy-vline 
WA_ISPECVAINSTWCOMP_STR-SPECVALASSGMTISINHTNCSOURCE sy-vline 
WA_ISPECVAINSTWCOMP_STR-SPECIFICATIONINTERNALID sy-vline 
WA_ISPECVAINSTWCOMP_STR-INHTDSPECVALASSGMTISTMPCHGD sy-vline 
WA_ISPECVAINSTWCOMP_STR-INHTDSPECVALASSGMTISPERMCHGD sy-vline 
WA_ISPECVAINSTWCOMP_STR-SPECINHERITANCETEMPLATE sy-vline 
WA_ISPECVAINSTWCOMP_STR-SPECVALASSGMTINHERITANCEPARENT sy-vline 
WA_ISPECVAINSTWCOMP_STR-SPECVALASSGMTINHERITANCEROOT sy-vline 
WA_ISPECVAINSTWCOMP_STR-SPECVALASSGMTROOTSPECINTID sy-vline 
WA_ISPECVAINSTWCOMP_STR-SPECVALASSGMTTYPE sy-vline 
WA_ISPECVAINSTWCOMP_STR-SPECVALASSGMTCHANGESTATE sy-vline 
WA_ISPECVAINSTWCOMP_STR-SPECVALASSGMTSORTSEQUENCE sy-vline 
WA_ISPECVAINSTWCOMP_STR-SPECVALASSGMTUNITREFDIMENSION sy-vline 
WA_ISPECVAINSTWCOMP_STR-VALUEASSIGNMENTSOURCE sy-vline 
WA_ISPECVAINSTWCOMP_STR-SPECIFICATIONRATING sy-vline 
WA_ISPECVAINSTWCOMP_STR-SPECIFICATIONVALIDITYAREA sy-vline 
WA_ISPECVAINSTWCOMP_STR-COMPSPECCOMPONENTTYPE sy-vline 
WA_ISPECVAINSTWCOMP_STR-COMPSPECLOWERLIMITOPERATOR sy-vline 
WA_ISPECVAINSTWCOMP_STR-COMPSPECLOWERLIMIT sy-vline 
WA_ISPECVAINSTWCOMP_STR-COMPSPECUPPERLIMITOPERATOR sy-vline 
WA_ISPECVAINSTWCOMP_STR-COMPSPECUPPERLIMIT sy-vline 
WA_ISPECVAINSTWCOMP_STR-COMPSPECQUANTITY sy-vline 
WA_ISPECVAINSTWCOMP_STR-COMPSPECUNIT sy-vline 
WA_ISPECVAINSTWCOMP_STR-COMPSPECSORTSEQUENCE sy-vline 
WA_ISPECVAINSTWCOMP_STR-COMPSPECDECIMALQUANTITY sy-vline 
WA_ISPECVAINSTWCOMP_STR-COMPSPECEXCEPTIONCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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