ABAP Select data from SAP table T7PIQ_GB_DECLIST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T7PIQ_GB_DECLIST 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 T7PIQ_GB_DECLIST. 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 T7PIQ_GB_DECLIST 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_T7PIQ_GB_DECLIST TYPE STANDARD TABLE OF T7PIQ_GB_DECLIST,
      WA_T7PIQ_GB_DECLIST TYPE T7PIQ_GB_DECLIST,
      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: <T7PIQ_GB_DECLIST> TYPE T7PIQ_GB_DECLIST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T7PIQ_GB_DECLIST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T7PIQ_GB_DECLIST
  INTO TABLE IT_T7PIQ_GB_DECLIST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T7PIQ_GB_DECLIST
*  INTO TABLE @DATA(IT_T7PIQ_GB_DECLIST2).
*--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_T7PIQ_GB_DECLIST INDEX 1 INTO DATA(WA_T7PIQ_GB_DECLIST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T7PIQ_GB_DECLIST ASSIGNING <T7PIQ_GB_DECLIST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T7PIQ_GB_DECLIST>-MANDT = 1.
<T7PIQ_GB_DECLIST>-STUDENTNR = 1.
<T7PIQ_GB_DECLIST>-TRANSCODE = 1.
<T7PIQ_GB_DECLIST>-SEQNR = 1.
<T7PIQ_GB_DECLIST>-CHOICENR = 1.

ENDLOOP.

LOOP AT IT_T7PIQ_GB_DECLIST INTO WA_T7PIQ_GB_DECLIST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T7PIQ_GB_DECLIST-DECISION, sy-vline,
  WA_T7PIQ_GB_DECLIST-COURSE_OLD, sy-vline,
  WA_T7PIQ_GB_DECLIST-COURSE, sy-vline,
  WA_T7PIQ_GB_DECLIST-CAMPUS, sy-vline,
  WA_T7PIQ_GB_DECLIST-ENTRY_DATE_OLD, sy-vline,
  WA_T7PIQ_GB_DECLIST-ENTRY_DATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T7PIQ_GB_DECLIST 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_T7PIQ_GB_DECLIST 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_T7PIQ_GB_DECLIST INTO WA_T7PIQ_GB_DECLIST.


*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 PIQST, internal->external for field STUDENTNR
CALL FUNCTION 'CONVERSION_EXIT_PIQST_OUTPUT'
  EXPORTING
    input =                      WA_T7PIQ_GB_DECLIST-STUDENTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T7PIQ_GB_DECLIST-STUDENTNR.
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_T7PIQ_GB_DECLIST_STR, 
MANDT TYPE STRING,
STUDENTNR TYPE STRING,
TRANSCODE TYPE STRING,
SEQNR TYPE STRING,
CHOICENR TYPE STRING,
DECISION TYPE STRING,
COURSE_OLD TYPE STRING,
COURSE TYPE STRING,
CAMPUS TYPE STRING,
ENTRY_DATE_OLD TYPE STRING,
ENTRY_DATE TYPE STRING,
ENTRY_POINT TYPE STRING,
CONDITION1 TYPE STRING,
CONDITION2 TYPE STRING,
CONDITION3 TYPE STRING,
REASON TYPE STRING,
AEDTM TYPE STRING,
UNAME TYPE STRING,
TIME TYPE STRING,
STATUS TYPE STRING,
PASSPORTID TYPE STRING,
COPYFORM TYPE STRING,
PERSONALID_IND TYPE STRING,
PERSONALID TYPE STRING,
APPL_SCHEME_CODE TYPE STRING,
OFFER_LEVEL TYPE STRING,
NACHN TYPE STRING,
VORNA TYPE STRING,
COND_MARK TYPE STRING,
MARK TYPE STRING,
CHECKED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T7PIQ_GB_DECLIST_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_T7PIQ_GB_DECLIST_STR-MANDT sy-vline 
WA_T7PIQ_GB_DECLIST_STR-STUDENTNR sy-vline 
WA_T7PIQ_GB_DECLIST_STR-TRANSCODE sy-vline 
WA_T7PIQ_GB_DECLIST_STR-SEQNR sy-vline 
WA_T7PIQ_GB_DECLIST_STR-CHOICENR sy-vline 
WA_T7PIQ_GB_DECLIST_STR-DECISION sy-vline 
WA_T7PIQ_GB_DECLIST_STR-COURSE_OLD sy-vline 
WA_T7PIQ_GB_DECLIST_STR-COURSE sy-vline 
WA_T7PIQ_GB_DECLIST_STR-CAMPUS sy-vline 
WA_T7PIQ_GB_DECLIST_STR-ENTRY_DATE_OLD sy-vline 
WA_T7PIQ_GB_DECLIST_STR-ENTRY_DATE sy-vline 
WA_T7PIQ_GB_DECLIST_STR-ENTRY_POINT sy-vline 
WA_T7PIQ_GB_DECLIST_STR-CONDITION1 sy-vline 
WA_T7PIQ_GB_DECLIST_STR-CONDITION2 sy-vline 
WA_T7PIQ_GB_DECLIST_STR-CONDITION3 sy-vline 
WA_T7PIQ_GB_DECLIST_STR-REASON sy-vline 
WA_T7PIQ_GB_DECLIST_STR-AEDTM sy-vline 
WA_T7PIQ_GB_DECLIST_STR-UNAME sy-vline 
WA_T7PIQ_GB_DECLIST_STR-TIME sy-vline 
WA_T7PIQ_GB_DECLIST_STR-STATUS sy-vline 
WA_T7PIQ_GB_DECLIST_STR-PASSPORTID sy-vline 
WA_T7PIQ_GB_DECLIST_STR-COPYFORM sy-vline 
WA_T7PIQ_GB_DECLIST_STR-PERSONALID_IND sy-vline 
WA_T7PIQ_GB_DECLIST_STR-PERSONALID sy-vline 
WA_T7PIQ_GB_DECLIST_STR-APPL_SCHEME_CODE sy-vline 
WA_T7PIQ_GB_DECLIST_STR-OFFER_LEVEL sy-vline 
WA_T7PIQ_GB_DECLIST_STR-NACHN sy-vline 
WA_T7PIQ_GB_DECLIST_STR-VORNA sy-vline 
WA_T7PIQ_GB_DECLIST_STR-COND_MARK sy-vline 
WA_T7PIQ_GB_DECLIST_STR-MARK sy-vline 
WA_T7PIQ_GB_DECLIST_STR-CHECKED sy-vline      INTO ld_text SEPARATED BY SPACE.

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