ABAP Select data from SAP table ISPECIDENTBYPOS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISPECIDENTBYPOS
*  INTO TABLE @DATA(IT_ISPECIDENTBYPOS2).
*--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_ISPECIDENTBYPOS INDEX 1 INTO DATA(WA_ISPECIDENTBYPOS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISPECIDENTBYPOS>-MANDT = 1.
<ISPECIDENTBYPOS>-SPECIDFGDESCINTERNALID = 1.
<ISPECIDENTBYPOS>-SPECIDFGDESCCHANGESTATE = 1.
<ISPECIDENTBYPOS>-SPECIFICATIONIDNLISTINGPOS = 1.
<ISPECIDENTBYPOS>-SPECIFICATIONCATEGORY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISPECIDENTBYPOS-SPECIFICATIONIDNLISTINGPRIO, sy-vline,
  WA_ISPECIDENTBYPOS-SPECIFICATIONIDNLISTING, sy-vline,
  WA_ISPECIDENTBYPOS-SPECIFICATIONINTERNALID, sy-vline,
  WA_ISPECIDENTBYPOS-SPECIDFGDESCCREATEDBYUSER, sy-vline,
  WA_ISPECIDENTBYPOS-SPECIDFGDESCCREATIONDATE, sy-vline,
  WA_ISPECIDENTBYPOS-SPECIDFGDESCLASTCHANGEDBYUSER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISPECIDENTBYPOS 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_ISPECIDENTBYPOS 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_ISPECIDENTBYPOS INTO WA_ISPECIDENTBYPOS.


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

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

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

*Conversion exit ISOLA, internal->external for field SPECIDFGDESCLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ISPECIDENTBYPOS-SPECIDFGDESCLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISPECIDENTBYPOS-SPECIDFGDESCLANGUAGE.
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_ISPECIDENTBYPOS_STR, 
MANDT TYPE STRING,
SPECIDFGDESCINTERNALID TYPE STRING,
SPECIDFGDESCCHANGESTATE TYPE STRING,
SPECIFICATIONIDNLISTINGPOS TYPE STRING,
SPECIFICATIONCATEGORY TYPE STRING,
SPECIFICATIONIDNLISTINGPRIO TYPE STRING,
SPECIFICATIONIDNLISTING TYPE STRING,
SPECIFICATIONINTERNALID TYPE STRING,
SPECIDFGDESCCREATEDBYUSER TYPE STRING,
SPECIDFGDESCCREATIONDATE TYPE STRING,
SPECIDFGDESCLASTCHANGEDBYUSER TYPE STRING,
SPECIDFGDESCLASTCHANGEDATE TYPE STRING,
SPECIDFGDESCCATEGORY TYPE STRING,
SPECIDFGDESCTYPE TYPE STRING,
SPECIDFGDESCLANGUAGE TYPE STRING,
SPECIDFGDESCTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISPECIDENTBYPOS_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_ISPECIDENTBYPOS_STR-MANDT sy-vline 
WA_ISPECIDENTBYPOS_STR-SPECIDFGDESCINTERNALID sy-vline 
WA_ISPECIDENTBYPOS_STR-SPECIDFGDESCCHANGESTATE sy-vline 
WA_ISPECIDENTBYPOS_STR-SPECIFICATIONIDNLISTINGPOS sy-vline 
WA_ISPECIDENTBYPOS_STR-SPECIFICATIONCATEGORY sy-vline 
WA_ISPECIDENTBYPOS_STR-SPECIFICATIONIDNLISTINGPRIO sy-vline 
WA_ISPECIDENTBYPOS_STR-SPECIFICATIONIDNLISTING sy-vline 
WA_ISPECIDENTBYPOS_STR-SPECIFICATIONINTERNALID sy-vline 
WA_ISPECIDENTBYPOS_STR-SPECIDFGDESCCREATEDBYUSER sy-vline 
WA_ISPECIDENTBYPOS_STR-SPECIDFGDESCCREATIONDATE sy-vline 
WA_ISPECIDENTBYPOS_STR-SPECIDFGDESCLASTCHANGEDBYUSER sy-vline 
WA_ISPECIDENTBYPOS_STR-SPECIDFGDESCLASTCHANGEDATE sy-vline 
WA_ISPECIDENTBYPOS_STR-SPECIDFGDESCCATEGORY sy-vline 
WA_ISPECIDENTBYPOS_STR-SPECIDFGDESCTYPE sy-vline 
WA_ISPECIDENTBYPOS_STR-SPECIDFGDESCLANGUAGE sy-vline 
WA_ISPECIDENTBYPOS_STR-SPECIDFGDESCTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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