ABAP Select data from SAP table PIQSTUDENT_PERSONAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQSTUDENT_PERSONAL
*  INTO TABLE @DATA(IT_PIQSTUDENT_PERSONAL2).
*--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_PIQSTUDENT_PERSONAL INDEX 1 INTO DATA(WA_PIQSTUDENT_PERSONAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQSTUDENT_PERSONAL>-CONTROLLER = 1.
<PIQSTUDENT_PERSONAL>-TASK_CODE = 1.
<PIQSTUDENT_PERSONAL>-STUDENT_PERSONAL_DATA_KEY = 1.
<PIQSTUDENT_PERSONAL>-CONTROLLER = 1.
<PIQSTUDENT_PERSONAL>-BEGDA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQSTUDENT_PERSONAL-ENDDA, sy-vline,
  WA_PIQSTUDENT_PERSONAL-STUDENT_PERSONAL_DATA, sy-vline,
  WA_PIQSTUDENT_PERSONAL-CONTROLLER, sy-vline,
  WA_PIQSTUDENT_PERSONAL-COUNTRY_OF_BIRTH_ISO, sy-vline,
  WA_PIQSTUDENT_PERSONAL-CONTROLLER, sy-vline,
  WA_PIQSTUDENT_PERSONAL-UPDATE_INDICATOR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQSTUDENT_PERSONAL 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_PIQSTUDENT_PERSONAL 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_PIQSTUDENT_PERSONAL INTO WA_PIQSTUDENT_PERSONAL.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PIQSTUDENT_PERSONAL_STR, 
CONTROLLER TYPE STRING,
TASK_CODE TYPE STRING,
STUDENT_PERSONAL_DATA_KEY TYPE STRING,
CONTROLLER TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
STUDENT_PERSONAL_DATA TYPE STRING,
CONTROLLER TYPE STRING,
COUNTRY_OF_BIRTH_ISO TYPE STRING,
CONTROLLER TYPE STRING,
UPDATE_INDICATOR TYPE STRING,
VALUE TYPE STRING,
REGION_OF_BIRTH TYPE STRING,
CONTROLLER TYPE STRING,
UPDATE_INDICATOR TYPE STRING,
VALUE TYPE STRING,
NATIONALITY_AT_BIRTH_ISO TYPE STRING,
CONTROLLER TYPE STRING,
UPDATE_INDICATOR TYPE STRING,
VALUE TYPE STRING,
SECOND_NATIONALITY_ISO TYPE STRING,
CONTROLLER TYPE STRING,
UPDATE_INDICATOR TYPE STRING,
VALUE TYPE STRING,
THIRD_NATIONALITY_ISO TYPE STRING,
CONTROLLER TYPE STRING,
UPDATE_INDICATOR TYPE STRING,
VALUE TYPE STRING,
PERSIDNO TYPE STRING,
CONTROLLER TYPE STRING,
UPDATE_INDICATOR TYPE STRING,
VALUE TYPE STRING,
DEATH_REGDATE TYPE STRING,
CONTROLLER TYPE STRING,
UPDATE_INDICATOR TYPE STRING,
VALUE TYPE STRING,
CURRENTLY_VALID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQSTUDENT_PERSONAL_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_PIQSTUDENT_PERSONAL_STR-CONTROLLER sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-TASK_CODE sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-STUDENT_PERSONAL_DATA_KEY sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-CONTROLLER sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-BEGDA sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-ENDDA sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-STUDENT_PERSONAL_DATA sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-CONTROLLER sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-COUNTRY_OF_BIRTH_ISO sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-CONTROLLER sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-UPDATE_INDICATOR sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-VALUE sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-REGION_OF_BIRTH sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-CONTROLLER sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-UPDATE_INDICATOR sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-VALUE sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-NATIONALITY_AT_BIRTH_ISO sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-CONTROLLER sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-UPDATE_INDICATOR sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-VALUE sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-SECOND_NATIONALITY_ISO sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-CONTROLLER sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-UPDATE_INDICATOR sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-VALUE sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-THIRD_NATIONALITY_ISO sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-CONTROLLER sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-UPDATE_INDICATOR sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-VALUE sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-PERSIDNO sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-CONTROLLER sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-UPDATE_INDICATOR sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-VALUE sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-DEATH_REGDATE sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-CONTROLLER sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-UPDATE_INDICATOR sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-VALUE sy-vline 
WA_PIQSTUDENT_PERSONAL_STR-CURRENTLY_VALID sy-vline      INTO ld_text SEPARATED BY SPACE.

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