ABAP Select data from SAP table PIQ_NL_DUO_COMP_PER_REC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PIQ_NL_DUO_COMP_PER_REC 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_NL_DUO_COMP_PER_REC. 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_NL_DUO_COMP_PER_REC 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_NL_DUO_COMP_PER_REC TYPE STANDARD TABLE OF PIQ_NL_DUO_COMP_PER_REC,
      WA_PIQ_NL_DUO_COMP_PER_REC TYPE PIQ_NL_DUO_COMP_PER_REC,
      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_NL_DUO_COMP_PER_REC> TYPE PIQ_NL_DUO_COMP_PER_REC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQ_NL_DUO_COMP_PER_REC
*  INTO TABLE @DATA(IT_PIQ_NL_DUO_COMP_PER_REC2).
*--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_NL_DUO_COMP_PER_REC INDEX 1 INTO DATA(WA_PIQ_NL_DUO_COMP_PER_REC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQ_NL_DUO_COMP_PER_REC>-SEL = 1.
<PIQ_NL_DUO_COMP_PER_REC>-STOBJID = 1.
<PIQ_NL_DUO_COMP_PER_REC>-STUDENT12 = 1.
<PIQ_NL_DUO_COMP_PER_REC>-PARTNER = 1.
<PIQ_NL_DUO_COMP_PER_REC>-STATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQ_NL_DUO_COMP_PER_REC-ID_NUMBER, sy-vline,
  WA_PIQ_NL_DUO_COMP_PER_REC-GESCH, sy-vline,
  WA_PIQ_NL_DUO_COMP_PER_REC-GBDAT, sy-vline,
  WA_PIQ_NL_DUO_COMP_PER_REC-GBORT, sy-vline,
  WA_PIQ_NL_DUO_COMP_PER_REC-GBLND, sy-vline,
  WA_PIQ_NL_DUO_COMP_PER_REC-CONFID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQ_NL_DUO_COMP_PER_REC 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_NL_DUO_COMP_PER_REC 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_NL_DUO_COMP_PER_REC INTO WA_PIQ_NL_DUO_COMP_PER_REC.


*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_PIQ_NL_DUO_COMP_PER_REC-STUDENT12
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_NL_DUO_COMP_PER_REC-STUDENT12.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_NL_DUO_COMP_PER_REC-PARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_NL_DUO_COMP_PER_REC-PARTNER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PDATE, internal->external for field GBDAT
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_NL_DUO_COMP_PER_REC-GBDAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_NL_DUO_COMP_PER_REC-GBDAT.
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_NL_DUO_COMP_PER_REC_STR, 
SEL TYPE STRING,
STOBJID TYPE STRING,
STUDENT12 TYPE STRING,
PARTNER TYPE STRING,
STATUS TYPE STRING,
ID_NUMBER TYPE STRING,
GESCH TYPE STRING,
GBDAT TYPE STRING,
GBORT TYPE STRING,
GBLND TYPE STRING,
CONFID TYPE STRING,
DEATHDATE TYPE STRING,
VORSW TYPE STRING,
VORNA TYPE STRING,
NACHN TYPE STRING,
IND_GBA_RELATION TYPE STRING,
ERROR_IN TYPE STRING,
STATUS_DESC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQ_NL_DUO_COMP_PER_REC_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_NL_DUO_COMP_PER_REC_STR-SEL sy-vline 
WA_PIQ_NL_DUO_COMP_PER_REC_STR-STOBJID sy-vline 
WA_PIQ_NL_DUO_COMP_PER_REC_STR-STUDENT12 sy-vline 
WA_PIQ_NL_DUO_COMP_PER_REC_STR-PARTNER sy-vline 
WA_PIQ_NL_DUO_COMP_PER_REC_STR-STATUS sy-vline 
WA_PIQ_NL_DUO_COMP_PER_REC_STR-ID_NUMBER sy-vline 
WA_PIQ_NL_DUO_COMP_PER_REC_STR-GESCH sy-vline 
WA_PIQ_NL_DUO_COMP_PER_REC_STR-GBDAT sy-vline 
WA_PIQ_NL_DUO_COMP_PER_REC_STR-GBORT sy-vline 
WA_PIQ_NL_DUO_COMP_PER_REC_STR-GBLND sy-vline 
WA_PIQ_NL_DUO_COMP_PER_REC_STR-CONFID sy-vline 
WA_PIQ_NL_DUO_COMP_PER_REC_STR-DEATHDATE sy-vline 
WA_PIQ_NL_DUO_COMP_PER_REC_STR-VORSW sy-vline 
WA_PIQ_NL_DUO_COMP_PER_REC_STR-VORNA sy-vline 
WA_PIQ_NL_DUO_COMP_PER_REC_STR-NACHN sy-vline 
WA_PIQ_NL_DUO_COMP_PER_REC_STR-IND_GBA_RELATION sy-vline 
WA_PIQ_NL_DUO_COMP_PER_REC_STR-ERROR_IN sy-vline 
WA_PIQ_NL_DUO_COMP_PER_REC_STR-STATUS_DESC sy-vline      INTO ld_text SEPARATED BY SPACE.

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