ABAP Select data from SAP table PIQSELMSTUDY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQSELMSTUDY
*  INTO TABLE @DATA(IT_PIQSELMSTUDY2).
*--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_PIQSELMSTUDY INDEX 1 INTO DATA(WA_PIQSELMSTUDY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQSELMSTUDY>-ACADYEAR = 1.
<PIQSELMSTUDY>-ACADSESSION = 1.
<PIQSELMSTUDY>-SCOBJID = 1.
<PIQSELMSTUDY>-PROGRAMTYPE = 1.
<PIQSELMSTUDY>-MODULEABBR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQSELMSTUDY-OOBJID, sy-vline,
  WA_PIQSELMSTUDY-CGOBJID, sy-vline,
  WA_PIQSELMSTUDY-SEVERITY, sy-vline,
  WA_PIQSELMSTUDY-SOBID, sy-vline,
  WA_PIQSELMSTUDY-SMSTATUS, sy-vline,
  WA_PIQSELMSTUDY-SCALEID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQSELMSTUDY 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_PIQSELMSTUDY 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_PIQSELMSTUDY INTO WA_PIQSELMSTUDY.


*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_PIQSELMSTUDY_STR, 
ACADYEAR TYPE STRING,
ACADSESSION TYPE STRING,
SCOBJID TYPE STRING,
PROGRAMTYPE TYPE STRING,
MODULEABBR TYPE STRING,
OOBJID TYPE STRING,
CGOBJID TYPE STRING,
SEVERITY TYPE STRING,
SOBID TYPE STRING,
SMSTATUS TYPE STRING,
SCALEID TYPE STRING,
GRADESYMAPP TYPE STRING,
AGRTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQSELMSTUDY_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_PIQSELMSTUDY_STR-ACADYEAR sy-vline 
WA_PIQSELMSTUDY_STR-ACADSESSION sy-vline 
WA_PIQSELMSTUDY_STR-SCOBJID sy-vline 
WA_PIQSELMSTUDY_STR-PROGRAMTYPE sy-vline 
WA_PIQSELMSTUDY_STR-MODULEABBR sy-vline 
WA_PIQSELMSTUDY_STR-OOBJID sy-vline 
WA_PIQSELMSTUDY_STR-CGOBJID sy-vline 
WA_PIQSELMSTUDY_STR-SEVERITY sy-vline 
WA_PIQSELMSTUDY_STR-SOBID sy-vline 
WA_PIQSELMSTUDY_STR-SMSTATUS sy-vline 
WA_PIQSELMSTUDY_STR-SCALEID sy-vline 
WA_PIQSELMSTUDY_STR-GRADESYMAPP sy-vline 
WA_PIQSELMSTUDY_STR-AGRTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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