ABAP Select data from SAP table PIQTRSESSION into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQTRSESSION
*  INTO TABLE @DATA(IT_PIQTRSESSION2).
*--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_PIQTRSESSION INDEX 1 INTO DATA(WA_PIQTRSESSION2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQTRSESSION>-SESSIONID = 1.
<PIQTRSESSION>-SESSIONYEAR = 1.
<PIQTRSESSION>-SESBEGDATE = 1.
<PIQTRSESSION>-SESENDDATE = 1.
<PIQTRSESSION>-SESWITHDRDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQTRSESSION-SESDEGREEID, sy-vline,
  WA_PIQTRSESSION-SESPROGRAMID, sy-vline,
  WA_PIQTRSESSION-STAGEID, sy-vline,
  WA_PIQTRSESSION-PROGCLASSID, sy-vline,
  WA_PIQTRSESSION-PROGACST, sy-vline,
  WA_PIQTRSESSION-PROGSTAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQTRSESSION 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_PIQTRSESSION 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_PIQTRSESSION INTO WA_PIQTRSESSION.


*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 CUNIT, internal->external for field EXTSESCREDTYPE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PIQTRSESSION-EXTSESCREDTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQTRSESSION-EXTSESCREDTYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field INTSESCREDTYPE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PIQTRSESSION-INTSESCREDTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQTRSESSION-INTSESCREDTYPE.
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_PIQTRSESSION_STR, 
SESSIONID TYPE STRING,
SESSIONYEAR TYPE STRING,
SESBEGDATE TYPE STRING,
SESENDDATE TYPE STRING,
SESWITHDRDATE TYPE STRING,
SESDEGREEID TYPE STRING,
SESPROGRAMID TYPE STRING,
STAGEID TYPE STRING,
PROGCLASSID TYPE STRING,
PROGACST TYPE STRING,
PROGSTAT TYPE STRING,
EXTSESGPA TYPE STRING,
EXTSESGPANORM TYPE STRING,
EXTSESGPASCALE TYPE STRING,
SESGPAMANFLAG TYPE STRING,
INTSESGPA TYPE STRING,
INTSESGPANORM TYPE STRING,
INTSESGPASCALE TYPE STRING,
EXTSESATMCRED TYPE STRING,
EXTSESGRDCRED TYPE STRING,
EXTSESERNCRED TYPE STRING,
EXTSESCREDTYPE TYPE STRING,
SESCREDMANFLAG TYPE STRING,
INTSESATMCRED TYPE STRING,
INTSESGRDCRED TYPE STRING,
INTSESERNCRED TYPE STRING,
INTSESCREDTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQTRSESSION_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_PIQTRSESSION_STR-SESSIONID sy-vline 
WA_PIQTRSESSION_STR-SESSIONYEAR sy-vline 
WA_PIQTRSESSION_STR-SESBEGDATE sy-vline 
WA_PIQTRSESSION_STR-SESENDDATE sy-vline 
WA_PIQTRSESSION_STR-SESWITHDRDATE sy-vline 
WA_PIQTRSESSION_STR-SESDEGREEID sy-vline 
WA_PIQTRSESSION_STR-SESPROGRAMID sy-vline 
WA_PIQTRSESSION_STR-STAGEID sy-vline 
WA_PIQTRSESSION_STR-PROGCLASSID sy-vline 
WA_PIQTRSESSION_STR-PROGACST sy-vline 
WA_PIQTRSESSION_STR-PROGSTAT sy-vline 
WA_PIQTRSESSION_STR-EXTSESGPA sy-vline 
WA_PIQTRSESSION_STR-EXTSESGPANORM sy-vline 
WA_PIQTRSESSION_STR-EXTSESGPASCALE sy-vline 
WA_PIQTRSESSION_STR-SESGPAMANFLAG sy-vline 
WA_PIQTRSESSION_STR-INTSESGPA sy-vline 
WA_PIQTRSESSION_STR-INTSESGPANORM sy-vline 
WA_PIQTRSESSION_STR-INTSESGPASCALE sy-vline 
WA_PIQTRSESSION_STR-EXTSESATMCRED sy-vline 
WA_PIQTRSESSION_STR-EXTSESGRDCRED sy-vline 
WA_PIQTRSESSION_STR-EXTSESERNCRED sy-vline 
WA_PIQTRSESSION_STR-EXTSESCREDTYPE sy-vline 
WA_PIQTRSESSION_STR-SESCREDMANFLAG sy-vline 
WA_PIQTRSESSION_STR-INTSESATMCRED sy-vline 
WA_PIQTRSESSION_STR-INTSESGRDCRED sy-vline 
WA_PIQTRSESSION_STR-INTSESERNCRED sy-vline 
WA_PIQTRSESSION_STR-INTSESCREDTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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