ABAP Select data from SAP table PIQ_REG_COURSES into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PIQ_REG_COURSES 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_REG_COURSES. 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_REG_COURSES 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_REG_COURSES TYPE STANDARD TABLE OF PIQ_REG_COURSES,
      WA_PIQ_REG_COURSES TYPE PIQ_REG_COURSES,
      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_REG_COURSES> TYPE PIQ_REG_COURSES.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQ_REG_COURSES
*  INTO TABLE @DATA(IT_PIQ_REG_COURSES2).
*--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_REG_COURSES INDEX 1 INTO DATA(WA_PIQ_REG_COURSES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQ_REG_COURSES>-STOBJID = 1.
<PIQ_REG_COURSES>-SMOBJID = 1.
<PIQ_REG_COURSES>-BEGDA = 1.
<PIQ_REG_COURSES>-ENDDA = 1.
<PIQ_REG_COURSES>-SMSTATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQ_REG_COURSES-STORREASON, sy-vline,
  WA_PIQ_REG_COURSES-STORDATE, sy-vline,
  WA_PIQ_REG_COURSES-CPATTEMP, sy-vline,
  WA_PIQ_REG_COURSES-CPUNIT, sy-vline,
  WA_PIQ_REG_COURSES-BOOKDATE, sy-vline,
  WA_PIQ_REG_COURSES-BOOKREASON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQ_REG_COURSES 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_REG_COURSES 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_REG_COURSES INTO WA_PIQ_REG_COURSES.


*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 CPUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_REG_COURSES-CPUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_REG_COURSES-CPUNIT.
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_REG_COURSES_STR, 
STOBJID TYPE STRING,
SMOBJID TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
SMSTATUS TYPE STRING,
STORREASON TYPE STRING,
STORDATE TYPE STRING,
CPATTEMP TYPE STRING,
CPUNIT TYPE STRING,
BOOKDATE TYPE STRING,
BOOKREASON TYPE STRING,
SMRATING TYPE STRING,
CHARGEFREE TYPE STRING,
TRANSFERFLAG TYPE STRING,
VARID TYPE STRING,
PERID TYPE STRING,
PERYR TYPE STRING,
SC_VS_D TYPE STRING,
PACKNUMBER TYPE STRING,
ALT_SCALEID TYPE STRING,
ID TYPE STRING,
WAITLIST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQ_REG_COURSES_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_REG_COURSES_STR-STOBJID sy-vline 
WA_PIQ_REG_COURSES_STR-SMOBJID sy-vline 
WA_PIQ_REG_COURSES_STR-BEGDA sy-vline 
WA_PIQ_REG_COURSES_STR-ENDDA sy-vline 
WA_PIQ_REG_COURSES_STR-SMSTATUS sy-vline 
WA_PIQ_REG_COURSES_STR-STORREASON sy-vline 
WA_PIQ_REG_COURSES_STR-STORDATE sy-vline 
WA_PIQ_REG_COURSES_STR-CPATTEMP sy-vline 
WA_PIQ_REG_COURSES_STR-CPUNIT sy-vline 
WA_PIQ_REG_COURSES_STR-BOOKDATE sy-vline 
WA_PIQ_REG_COURSES_STR-BOOKREASON sy-vline 
WA_PIQ_REG_COURSES_STR-SMRATING sy-vline 
WA_PIQ_REG_COURSES_STR-CHARGEFREE sy-vline 
WA_PIQ_REG_COURSES_STR-TRANSFERFLAG sy-vline 
WA_PIQ_REG_COURSES_STR-VARID sy-vline 
WA_PIQ_REG_COURSES_STR-PERID sy-vline 
WA_PIQ_REG_COURSES_STR-PERYR sy-vline 
WA_PIQ_REG_COURSES_STR-SC_VS_D sy-vline 
WA_PIQ_REG_COURSES_STR-PACKNUMBER sy-vline 
WA_PIQ_REG_COURSES_STR-ALT_SCALEID sy-vline 
WA_PIQ_REG_COURSES_STR-ID sy-vline 
WA_PIQ_REG_COURSES_STR-WAITLIST sy-vline      INTO ld_text SEPARATED BY SPACE.

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