ABAP Select data from SAP table PIQSTREGPER2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PIQSTREGPER2 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 PIQSTREGPER2. 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 PIQSTREGPER2 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_PIQSTREGPER2 TYPE STANDARD TABLE OF PIQSTREGPER2,
      WA_PIQSTREGPER2 TYPE PIQSTREGPER2,
      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: <PIQSTREGPER2> TYPE PIQSTREGPER2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PIQSTREGPER2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PIQSTREGPER2
  INTO TABLE IT_PIQSTREGPER2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQSTREGPER2
*  INTO TABLE @DATA(IT_PIQSTREGPER22).
*--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_PIQSTREGPER2 INDEX 1 INTO DATA(WA_PIQSTREGPER22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PIQSTREGPER2 ASSIGNING <PIQSTREGPER2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQSTREGPER2>-ST_OBJID = 1.
<PIQSTREGPER2>-CS_OBJID = 1.
<PIQSTREGPER2>-SC_OBJID = 1.
<PIQSTREGPER2>-CS_PRIOX = 1.
<PIQSTREGPER2>-BEGDA = 1.

ENDLOOP.

LOOP AT IT_PIQSTREGPER2 INTO WA_PIQSTREGPER2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQSTREGPER2-ENDDA, sy-vline,
  WA_PIQSTREGPER2-PERYR, sy-vline,
  WA_PIQSTREGPER2-PERID, sy-vline,
  WA_PIQSTREGPER2-ACLEVEL, sy-vline,
  WA_PIQSTREGPER2-REGDATE, sy-vline,
  WA_PIQSTREGPER2-PARTT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQSTREGPER2 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_PIQSTREGPER2 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_PIQSTREGPER2 INTO WA_PIQSTREGPER2.


*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_PIQSTREGPER2_STR, 
ST_OBJID TYPE STRING,
CS_OBJID TYPE STRING,
SC_OBJID TYPE STRING,
CS_PRIOX TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
PERYR TYPE STRING,
PERID TYPE STRING,
ACLEVEL TYPE STRING,
REGDATE TYPE STRING,
PARTT TYPE STRING,
LEAVE_REASON TYPE STRING,
PERCT TYPE STRING,
ENRCATEG TYPE STRING,
REGCLASS TYPE STRING,
ADM_GUID TYPE STRING,
ACLEVELVAR TYPE STRING,
VARID TYPE STRING,
VARIDUNIT TYPE STRING,
LEAVE_REASONT TYPE STRING,
RESTRICTED TYPE STRING,
ENRCATEGT TYPE STRING,
DEGREE_SEEK TYPE STRING,
CSFIRST TYPE STRING,
CSOTHER TYPE STRING,
PR_STATUS TYPE STRING,
PRS_STATE TYPE STRING,
PR_PROCESS TYPE STRING,
PR_PROCESST TYPE STRING,
TIMEUNITT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQSTREGPER2_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_PIQSTREGPER2_STR-ST_OBJID sy-vline 
WA_PIQSTREGPER2_STR-CS_OBJID sy-vline 
WA_PIQSTREGPER2_STR-SC_OBJID sy-vline 
WA_PIQSTREGPER2_STR-CS_PRIOX sy-vline 
WA_PIQSTREGPER2_STR-BEGDA sy-vline 
WA_PIQSTREGPER2_STR-ENDDA sy-vline 
WA_PIQSTREGPER2_STR-PERYR sy-vline 
WA_PIQSTREGPER2_STR-PERID sy-vline 
WA_PIQSTREGPER2_STR-ACLEVEL sy-vline 
WA_PIQSTREGPER2_STR-REGDATE sy-vline 
WA_PIQSTREGPER2_STR-PARTT sy-vline 
WA_PIQSTREGPER2_STR-LEAVE_REASON sy-vline 
WA_PIQSTREGPER2_STR-PERCT sy-vline 
WA_PIQSTREGPER2_STR-ENRCATEG sy-vline 
WA_PIQSTREGPER2_STR-REGCLASS sy-vline 
WA_PIQSTREGPER2_STR-ADM_GUID sy-vline 
WA_PIQSTREGPER2_STR-ACLEVELVAR sy-vline 
WA_PIQSTREGPER2_STR-VARID sy-vline 
WA_PIQSTREGPER2_STR-VARIDUNIT sy-vline 
WA_PIQSTREGPER2_STR-LEAVE_REASONT sy-vline 
WA_PIQSTREGPER2_STR-RESTRICTED sy-vline 
WA_PIQSTREGPER2_STR-ENRCATEGT sy-vline 
WA_PIQSTREGPER2_STR-DEGREE_SEEK sy-vline 
WA_PIQSTREGPER2_STR-CSFIRST sy-vline 
WA_PIQSTREGPER2_STR-CSOTHER sy-vline 
WA_PIQSTREGPER2_STR-PR_STATUS sy-vline 
WA_PIQSTREGPER2_STR-PRS_STATE sy-vline 
WA_PIQSTREGPER2_STR-PR_PROCESS sy-vline 
WA_PIQSTREGPER2_STR-PR_PROCESST sy-vline 
WA_PIQSTREGPER2_STR-TIMEUNITT sy-vline      INTO ld_text SEPARATED BY SPACE.

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