ABAP Select data from SAP table PIQRULESC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQRULESC
*  INTO TABLE @DATA(IT_PIQRULESC2).
*--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_PIQRULESC INDEX 1 INTO DATA(WA_PIQRULESC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQRULESC>-PLVAR = 1.
<PIQRULESC>-OBJID = 1.
<PIQRULESC>-SHORT = 1.
<PIQRULESC>-STEXT = 1.
<PIQRULESC>-SUM_APPROVED_ST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQRULESC-1024_ISTAT, sy-vline,
  WA_PIQRULESC-1024_BEGDA, sy-vline,
  WA_PIQRULESC-1024_ENDDA, sy-vline,
  WA_PIQRULESC-KAPZ1, sy-vline,
  WA_PIQRULESC-KAPZ2, sy-vline,
  WA_PIQRULESC-KAPZ3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQRULESC 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_PIQRULESC 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_PIQRULESC INTO WA_PIQRULESC.


*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_PIQRULESC-CPUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQRULESC-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_PIQRULESC_STR, 
PLVAR TYPE STRING,
OBJID TYPE STRING,
SHORT TYPE STRING,
STEXT TYPE STRING,
SUM_APPROVED_ST TYPE STRING,
1024_ISTAT TYPE STRING,
1024_BEGDA TYPE STRING,
1024_ENDDA TYPE STRING,
KAPZ1 TYPE STRING,
KAPZ2 TYPE STRING,
KAPZ3 TYPE STRING,
1730_ISTAT TYPE STRING,
1730_BEGDA TYPE STRING,
1730_ENDDA TYPE STRING,
VARID TYPE STRING,
ACLEVELVAR TYPE STRING,
OPTLENGTH TYPE STRING,
MAXLENGTH TYPE STRING,
TIMEUNIT TYPE STRING,
RESTRICTED TYPE STRING,
FULLTPARTT TYPE STRING,
GRPVAR TYPE STRING,
PROGCVAR TYPE STRING,
ASSPROC TYPE STRING,
CENMAINT TYPE STRING,
INACTIVE TYPE STRING,
PHD_PROG_TYPE TYPE STRING,
STRUCTURED TYPE STRING,
CLINIC_PGM TYPE STRING,
QUAL_CLASS TYPE STRING,
QUAL_CLASST TYPE STRING,
CPMIN TYPE STRING,
CPMAX TYPE STRING,
CPUNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQRULESC_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_PIQRULESC_STR-PLVAR sy-vline 
WA_PIQRULESC_STR-OBJID sy-vline 
WA_PIQRULESC_STR-SHORT sy-vline 
WA_PIQRULESC_STR-STEXT sy-vline 
WA_PIQRULESC_STR-SUM_APPROVED_ST sy-vline 
WA_PIQRULESC_STR-1024_ISTAT sy-vline 
WA_PIQRULESC_STR-1024_BEGDA sy-vline 
WA_PIQRULESC_STR-1024_ENDDA sy-vline 
WA_PIQRULESC_STR-KAPZ1 sy-vline 
WA_PIQRULESC_STR-KAPZ2 sy-vline 
WA_PIQRULESC_STR-KAPZ3 sy-vline 
WA_PIQRULESC_STR-1730_ISTAT sy-vline 
WA_PIQRULESC_STR-1730_BEGDA sy-vline 
WA_PIQRULESC_STR-1730_ENDDA sy-vline 
WA_PIQRULESC_STR-VARID sy-vline 
WA_PIQRULESC_STR-ACLEVELVAR sy-vline 
WA_PIQRULESC_STR-OPTLENGTH sy-vline 
WA_PIQRULESC_STR-MAXLENGTH sy-vline 
WA_PIQRULESC_STR-TIMEUNIT sy-vline 
WA_PIQRULESC_STR-RESTRICTED sy-vline 
WA_PIQRULESC_STR-FULLTPARTT sy-vline 
WA_PIQRULESC_STR-GRPVAR sy-vline 
WA_PIQRULESC_STR-PROGCVAR sy-vline 
WA_PIQRULESC_STR-ASSPROC sy-vline 
WA_PIQRULESC_STR-CENMAINT sy-vline 
WA_PIQRULESC_STR-INACTIVE sy-vline 
WA_PIQRULESC_STR-PHD_PROG_TYPE sy-vline 
WA_PIQRULESC_STR-STRUCTURED sy-vline 
WA_PIQRULESC_STR-CLINIC_PGM sy-vline 
WA_PIQRULESC_STR-QUAL_CLASS sy-vline 
WA_PIQRULESC_STR-QUAL_CLASST sy-vline 
WA_PIQRULESC_STR-CPMIN sy-vline 
WA_PIQRULESC_STR-CPMAX sy-vline 
WA_PIQRULESC_STR-CPUNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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