ABAP Select data from SAP table ISPECFORKDATE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISPECFORKDATE
*  INTO TABLE @DATA(IT_ISPECFORKDATE2).
*--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_ISPECFORKDATE INDEX 1 INTO DATA(WA_ISPECFORKDATE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISPECFORKDATE>-MANDT = 1.
<ISPECFORKDATE>-SPECIFICATIONINTERNALID = 1.
<ISPECFORKDATE>-SPECIFICATIONCHANGESTATE = 1.
<ISPECFORKDATE>-SPECIFICATION = 1.
<ISPECFORKDATE>-SPECIFICATIONVALIDITYSTARTDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISPECFORKDATE-SPECIFICATIONVALIDITYENDDATE, sy-vline,
  WA_ISPECFORKDATE-SPECIFICATIONCHANGENUMBER, sy-vline,
  WA_ISPECFORKDATE-SPECIFICATIONISDELETED, sy-vline,
  WA_ISPECFORKDATE-SPECIFICATIONCREATIONDATE, sy-vline,
  WA_ISPECFORKDATE-SPECIFICATIONCREATEDBYUSER, sy-vline,
  WA_ISPECFORKDATE-SPECIFICATIONLASTCHANGEDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISPECFORKDATE 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_ISPECFORKDATE 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_ISPECFORKDATE INTO WA_ISPECFORKDATE.


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

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

*Conversion exit ALPHA, internal->external for field SPECIFICATIONCHANGENUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISPECFORKDATE-SPECIFICATIONCHANGENUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISPECFORKDATE-SPECIFICATIONCHANGENUMBER.
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_ISPECFORKDATE_STR, 
MANDT TYPE STRING,
SPECIFICATIONINTERNALID TYPE STRING,
SPECIFICATIONCHANGESTATE TYPE STRING,
SPECIFICATION TYPE STRING,
SPECIFICATIONVALIDITYSTARTDATE TYPE STRING,
SPECIFICATIONVALIDITYENDDATE TYPE STRING,
SPECIFICATIONCHANGENUMBER TYPE STRING,
SPECIFICATIONISDELETED TYPE STRING,
SPECIFICATIONCREATIONDATE TYPE STRING,
SPECIFICATIONCREATEDBYUSER TYPE STRING,
SPECIFICATIONLASTCHANGEDATE TYPE STRING,
SPECIFICATIONLASTCHANGEDBYUSER TYPE STRING,
SPECIFICATIONTYPE TYPE STRING,
SPECIFICATIONSUBSTANCENATR TYPE STRING,
SPECIFICATIONAUTHZNGROUP TYPE STRING,
SPECIFICATIONNOTE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISPECFORKDATE_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_ISPECFORKDATE_STR-MANDT sy-vline 
WA_ISPECFORKDATE_STR-SPECIFICATIONINTERNALID sy-vline 
WA_ISPECFORKDATE_STR-SPECIFICATIONCHANGESTATE sy-vline 
WA_ISPECFORKDATE_STR-SPECIFICATION sy-vline 
WA_ISPECFORKDATE_STR-SPECIFICATIONVALIDITYSTARTDATE sy-vline 
WA_ISPECFORKDATE_STR-SPECIFICATIONVALIDITYENDDATE sy-vline 
WA_ISPECFORKDATE_STR-SPECIFICATIONCHANGENUMBER sy-vline 
WA_ISPECFORKDATE_STR-SPECIFICATIONISDELETED sy-vline 
WA_ISPECFORKDATE_STR-SPECIFICATIONCREATIONDATE sy-vline 
WA_ISPECFORKDATE_STR-SPECIFICATIONCREATEDBYUSER sy-vline 
WA_ISPECFORKDATE_STR-SPECIFICATIONLASTCHANGEDATE sy-vline 
WA_ISPECFORKDATE_STR-SPECIFICATIONLASTCHANGEDBYUSER sy-vline 
WA_ISPECFORKDATE_STR-SPECIFICATIONTYPE sy-vline 
WA_ISPECFORKDATE_STR-SPECIFICATIONSUBSTANCENATR sy-vline 
WA_ISPECFORKDATE_STR-SPECIFICATIONAUTHZNGROUP sy-vline 
WA_ISPECFORKDATE_STR-SPECIFICATIONNOTE sy-vline      INTO ld_text SEPARATED BY SPACE.

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