ABAP Select data from SAP table PIQSTREG_Q into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQSTREG_Q
*  INTO TABLE @DATA(IT_PIQSTREG_Q2).
*--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_PIQSTREG_Q INDEX 1 INTO DATA(WA_PIQSTREG_Q2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQSTREG_Q>-STUDENT12 = 1.
<PIQSTREG_Q>-ST_STEXT = 1.
<PIQSTREG_Q>-SC_SHORT = 1.
<PIQSTREG_Q>-SC_STEXT = 1.
<PIQSTREG_Q>-O_OTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQSTREG_Q-O_OBJID, sy-vline,
  WA_PIQSTREG_Q-O_SEARK, sy-vline,
  WA_PIQSTREG_Q-O_SHORT, sy-vline,
  WA_PIQSTREG_Q-O_STEXT, sy-vline,
  WA_PIQSTREG_Q-PERYT, sy-vline,
  WA_PIQSTREG_Q-PERIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQSTREG_Q 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_PIQSTREG_Q 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_PIQSTREG_Q INTO WA_PIQSTREG_Q.


*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 PIQST, internal->external for field STUDENT12
CALL FUNCTION 'CONVERSION_EXIT_PIQST_OUTPUT'
  EXPORTING
    input =                      WA_PIQSTREG_Q-STUDENT12
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQSTREG_Q-STUDENT12.
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_PIQSTREG_Q_STR, 
STUDENT12 TYPE STRING,
ST_STEXT TYPE STRING,
SC_SHORT TYPE STRING,
SC_STEXT TYPE STRING,
O_OTYPE TYPE STRING,
O_OBJID TYPE STRING,
O_SEARK TYPE STRING,
O_SHORT TYPE STRING,
O_STEXT TYPE STRING,
PERYT TYPE STRING,
PERIT TYPE STRING,
ACLEVELT TYPE STRING,
REGSTATUSQF TYPE STRING,
REGSTATUS TYPE STRING,
ACLEVELVAR TYPE STRING,
VARID TYPE STRING,
VARIDUNIT TYPE STRING,
LEAVE_REASONT TYPE STRING,
LEAVE TYPE STRING,
ACTST TYPE STRING,
RESTRICTED TYPE STRING,
PROGCLASST TYPE STRING,
PROGCVAR TYPE STRING,
ENRCATEGT TYPE STRING,
DEGREE_SEEK TYPE STRING,
CSFIRST TYPE STRING,
CSOTHER TYPE STRING,
REGCLASST TYPE STRING,
CANCEL_PROCESST TYPE STRING,
CANCEL_REASONT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQSTREG_Q_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_PIQSTREG_Q_STR-STUDENT12 sy-vline 
WA_PIQSTREG_Q_STR-ST_STEXT sy-vline 
WA_PIQSTREG_Q_STR-SC_SHORT sy-vline 
WA_PIQSTREG_Q_STR-SC_STEXT sy-vline 
WA_PIQSTREG_Q_STR-O_OTYPE sy-vline 
WA_PIQSTREG_Q_STR-O_OBJID sy-vline 
WA_PIQSTREG_Q_STR-O_SEARK sy-vline 
WA_PIQSTREG_Q_STR-O_SHORT sy-vline 
WA_PIQSTREG_Q_STR-O_STEXT sy-vline 
WA_PIQSTREG_Q_STR-PERYT sy-vline 
WA_PIQSTREG_Q_STR-PERIT sy-vline 
WA_PIQSTREG_Q_STR-ACLEVELT sy-vline 
WA_PIQSTREG_Q_STR-REGSTATUSQF sy-vline 
WA_PIQSTREG_Q_STR-REGSTATUS sy-vline 
WA_PIQSTREG_Q_STR-ACLEVELVAR sy-vline 
WA_PIQSTREG_Q_STR-VARID sy-vline 
WA_PIQSTREG_Q_STR-VARIDUNIT sy-vline 
WA_PIQSTREG_Q_STR-LEAVE_REASONT sy-vline 
WA_PIQSTREG_Q_STR-LEAVE sy-vline 
WA_PIQSTREG_Q_STR-ACTST sy-vline 
WA_PIQSTREG_Q_STR-RESTRICTED sy-vline 
WA_PIQSTREG_Q_STR-PROGCLASST sy-vline 
WA_PIQSTREG_Q_STR-PROGCVAR sy-vline 
WA_PIQSTREG_Q_STR-ENRCATEGT sy-vline 
WA_PIQSTREG_Q_STR-DEGREE_SEEK sy-vline 
WA_PIQSTREG_Q_STR-CSFIRST sy-vline 
WA_PIQSTREG_Q_STR-CSOTHER sy-vline 
WA_PIQSTREG_Q_STR-REGCLASST sy-vline 
WA_PIQSTREG_Q_STR-CANCEL_PROCESST sy-vline 
WA_PIQSTREG_Q_STR-CANCEL_REASONT sy-vline      INTO ld_text SEPARATED BY SPACE.

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