ABAP Select data from SAP table PIQ_STUDENT_REGIST_LIST into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQ_STUDENT_REGIST_LIST
*  INTO TABLE @DATA(IT_PIQ_STUDENT_REGIST_LIST2).
*--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_PIQ_STUDENT_REGIST_LIST INDEX 1 INTO DATA(WA_PIQ_STUDENT_REGIST_LIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQ_STUDENT_REGIST_LIST>-ST_OBJID = 1.
<PIQ_STUDENT_REGIST_LIST>-CS_OBJID = 1.
<PIQ_STUDENT_REGIST_LIST>-SC_OBJID = 1.
<PIQ_STUDENT_REGIST_LIST>-CS_PRIOX = 1.
<PIQ_STUDENT_REGIST_LIST>-APPTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQ_STUDENT_REGIST_LIST-BEGDA, sy-vline,
  WA_PIQ_STUDENT_REGIST_LIST-ENDDA, sy-vline,
  WA_PIQ_STUDENT_REGIST_LIST-PERYR, sy-vline,
  WA_PIQ_STUDENT_REGIST_LIST-PERID, sy-vline,
  WA_PIQ_STUDENT_REGIST_LIST-ACLEVEL, sy-vline,
  WA_PIQ_STUDENT_REGIST_LIST-REGDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQ_STUDENT_REGIST_LIST 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_PIQ_STUDENT_REGIST_LIST 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_PIQ_STUDENT_REGIST_LIST INTO WA_PIQ_STUDENT_REGIST_LIST.


*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 STUDENT12
CALL FUNCTION 'CONVERSION_EXIT_PIQST_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_STUDENT_REGIST_LIST-STUDENT12
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_STUDENT_REGIST_LIST-STUDENT12.
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_PIQ_STUDENT_REGIST_LIST_STR, 
ST_OBJID TYPE STRING,
CS_OBJID TYPE STRING,
SC_OBJID TYPE STRING,
CS_PRIOX TYPE STRING,
APPTYPE TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
PERYR TYPE STRING,
PERID TYPE STRING,
ACLEVEL TYPE STRING,
REGDATE TYPE STRING,
PARTT TYPE STRING,
REG_APPTYPE TYPE STRING,
LEAVE_REASON TYPE STRING,
FEEFL TYPE STRING,
PERCT TYPE STRING,
APPREASON TYPE STRING,
PROGCLASS TYPE STRING,
ENRCATEG TYPE STRING,
PR_STATUS TYPE STRING,
PRS_STATE TYPE STRING,
REGCLASS TYPE STRING,
CANCPROCESS TYPE STRING,
CANCREASON TYPE STRING,
CANCDATE TYPE STRING,
ADM_GUID TYPE STRING,
STUDENT12 TYPE STRING,
ST_STEXT TYPE STRING,
SC_SHORT TYPE STRING,
SC_STEXT TYPE STRING,
O_OTYPE TYPE STRING,
O_OBJID TYPE STRING,
O_SEARK TYPE STRING,
O_SHORT TYPE STRING,
O_STEXT TYPE STRING,
PERYT TYPE STRING,
PERIT TYPE STRING,
ACLEVELT TYPE STRING,
REGSTATUSQF TYPE STRING,
REGSTATUS TYPE STRING,
ACLEVELVAR TYPE STRING,
VARID TYPE STRING,
VARIDUNIT TYPE STRING,
LEAVE_REASONT TYPE STRING,
LEAVE TYPE STRING,
ACTST TYPE STRING,
RESTRICTED TYPE STRING,
PROGCLASST TYPE STRING,
PROGCVAR TYPE STRING,
ENRCATEGT TYPE STRING,
DEGREE_SEEK TYPE STRING,
CSFIRST TYPE STRING,
CSOTHER TYPE STRING,
REGCLASST TYPE STRING,
CANCEL_PROCESST TYPE STRING,
CANCEL_REASONT TYPE STRING,
REGSTATUST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQ_STUDENT_REGIST_LIST_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_PIQ_STUDENT_REGIST_LIST_STR-ST_OBJID sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-CS_OBJID sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-SC_OBJID sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-CS_PRIOX sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-APPTYPE sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-BEGDA sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-ENDDA sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-PERYR sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-PERID sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-ACLEVEL sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-REGDATE sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-PARTT sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-REG_APPTYPE sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-LEAVE_REASON sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-FEEFL sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-PERCT sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-APPREASON sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-PROGCLASS sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-ENRCATEG sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-PR_STATUS sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-PRS_STATE sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-REGCLASS sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-CANCPROCESS sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-CANCREASON sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-CANCDATE sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-ADM_GUID sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-STUDENT12 sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-ST_STEXT sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-SC_SHORT sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-SC_STEXT sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-O_OTYPE sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-O_OBJID sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-O_SEARK sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-O_SHORT sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-O_STEXT sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-PERYT sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-PERIT sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-ACLEVELT sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-REGSTATUSQF sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-REGSTATUS sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-ACLEVELVAR sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-VARID sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-VARIDUNIT sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-LEAVE_REASONT sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-LEAVE sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-ACTST sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-RESTRICTED sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-PROGCLASST sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-PROGCVAR sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-ENRCATEGT sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-DEGREE_SEEK sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-CSFIRST sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-CSOTHER sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-REGCLASST sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-CANCEL_PROCESST sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-CANCEL_REASONT sy-vline 
WA_PIQ_STUDENT_REGIST_LIST_STR-REGSTATUST sy-vline      INTO ld_text SEPARATED BY SPACE.

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