ABAP Select data from SAP table PIQRFC_DE_SESS_REGISTS_TXT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQRFC_DE_SESS_REGISTS_TXT
*  INTO TABLE @DATA(IT_PIQRFC_DE_SESS_REGISTS_TXT2).
*--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_PIQRFC_DE_SESS_REGISTS_TXT INDEX 1 INTO DATA(WA_PIQRFC_DE_SESS_REGISTS_TXT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQRFC_DE_SESS_REGISTS_TXT>-STUDENT_OBJECTID = 1.
<PIQRFC_DE_SESS_REGISTS_TXT>-STUDY_OBJECTID = 1.
<PIQRFC_DE_SESS_REGISTS_TXT>-PROGRAM_OBJECTID = 1.
<PIQRFC_DE_SESS_REGISTS_TXT>-BEGDA = 1.
<PIQRFC_DE_SESS_REGISTS_TXT>-ENDDA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQRFC_DE_SESS_REGISTS_TXT-STUDY_PRIORITY, sy-vline,
  WA_PIQRFC_DE_SESS_REGISTS_TXT-ACAD_YEAR, sy-vline,
  WA_PIQRFC_DE_SESS_REGISTS_TXT-ACAD_SESSION, sy-vline,
  WA_PIQRFC_DE_SESS_REGISTS_TXT-STAGE, sy-vline,
  WA_PIQRFC_DE_SESS_REGISTS_TXT-REGIST_DATE, sy-vline,
  WA_PIQRFC_DE_SESS_REGISTS_TXT-PARTTIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQRFC_DE_SESS_REGISTS_TXT 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_PIQRFC_DE_SESS_REGISTS_TXT 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_PIQRFC_DE_SESS_REGISTS_TXT INTO WA_PIQRFC_DE_SESS_REGISTS_TXT.


*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_PIQRFC_DE_SESS_REGISTS_TXT_STR, 
STUDENT_OBJECTID TYPE STRING,
STUDY_OBJECTID TYPE STRING,
PROGRAM_OBJECTID TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
STUDY_PRIORITY TYPE STRING,
ACAD_YEAR TYPE STRING,
ACAD_SESSION TYPE STRING,
STAGE TYPE STRING,
REGIST_DATE TYPE STRING,
PARTTIME TYPE STRING,
LEAVE_REASON TYPE STRING,
COMPL_LENGTH_STUDY TYPE STRING,
REGIST_TYPE TYPE STRING,
DEGREE_SEEKING TYPE STRING,
REGIST_STATUS TYPE STRING,
REGIST_STATE TYPE STRING,
REGIST_CLASS TYPE STRING,
ADM_GUID TYPE STRING,
CANCEL_PROCESS TYPE STRING,
CANCEL_REASON TYPE STRING,
CANCEL_DATE TYPE STRING,
PROGRAM_SHORT TYPE STRING,
PROGRAM_TXT TYPE STRING,
ACAD_YEAR_TXT TYPE STRING,
ACAD_SESSION_TXT TYPE STRING,
STAGE_TXT TYPE STRING,
LEAVE_REASON_TXT TYPE STRING,
REGIST_TYPE_TXT TYPE STRING,
REGIST_CLASS_TXT TYPE STRING,
CANCEL_PROCESS_TXT TYPE STRING,
CANCEL_REASON_TXT TYPE STRING,
TARGET_DEGREE TYPE STRING,
STUDYTYPE TYPE STRING,
FULLPARTDUAL TYPE STRING,
INTERRUPTSEM TYPE STRING,
PARTTYPE TYPE STRING,
PARTREASON TYPE STRING,
PHD_PROG_TYPE TYPE STRING,
TARGET_DEGREE_TXT TYPE STRING,
STUDYTYPE_TXT TYPE STRING,
PARTTYPE_TXT TYPE STRING,
PARTREASON_TXT TYPE STRING,
PHD_PROG_TYPE_TEXT TYPE STRING,
PREPSEM TYPE STRING,
UNIVERSITYSEM TYPE STRING,
LEAVEOFABSSEM TYPE STRING,
INTERNSHIPSEM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQRFC_DE_SESS_REGISTS_TXT_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_PIQRFC_DE_SESS_REGISTS_TXT_STR-STUDENT_OBJECTID sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-STUDY_OBJECTID sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-PROGRAM_OBJECTID sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-BEGDA sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-ENDDA sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-STUDY_PRIORITY sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-ACAD_YEAR sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-ACAD_SESSION sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-STAGE sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-REGIST_DATE sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-PARTTIME sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-LEAVE_REASON sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-COMPL_LENGTH_STUDY sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-REGIST_TYPE sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-DEGREE_SEEKING sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-REGIST_STATUS sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-REGIST_STATE sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-REGIST_CLASS sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-ADM_GUID sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-CANCEL_PROCESS sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-CANCEL_REASON sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-CANCEL_DATE sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-PROGRAM_SHORT sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-PROGRAM_TXT sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-ACAD_YEAR_TXT sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-ACAD_SESSION_TXT sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-STAGE_TXT sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-LEAVE_REASON_TXT sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-REGIST_TYPE_TXT sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-REGIST_CLASS_TXT sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-CANCEL_PROCESS_TXT sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-CANCEL_REASON_TXT sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-TARGET_DEGREE sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-STUDYTYPE sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-FULLPARTDUAL sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-INTERRUPTSEM sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-PARTTYPE sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-PARTREASON sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-PHD_PROG_TYPE sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-TARGET_DEGREE_TXT sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-STUDYTYPE_TXT sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-PARTTYPE_TXT sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-PARTREASON_TXT sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-PHD_PROG_TYPE_TEXT sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-PREPSEM sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-UNIVERSITYSEM sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-LEAVEOFABSSEM sy-vline 
WA_PIQRFC_DE_SESS_REGISTS_TXT_STR-INTERNSHIPSEM sy-vline      INTO ld_text SEPARATED BY SPACE.

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