ABAP Select data from SAP table PIQ_RELATION_DETAILS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PIQ_RELATION_DETAILS 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_RELATION_DETAILS. 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_RELATION_DETAILS 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_RELATION_DETAILS TYPE STANDARD TABLE OF PIQ_RELATION_DETAILS,
      WA_PIQ_RELATION_DETAILS TYPE PIQ_RELATION_DETAILS,
      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_RELATION_DETAILS> TYPE PIQ_RELATION_DETAILS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQ_RELATION_DETAILS
*  INTO TABLE @DATA(IT_PIQ_RELATION_DETAILS2).
*--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_RELATION_DETAILS INDEX 1 INTO DATA(WA_PIQ_RELATION_DETAILS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQ_RELATION_DETAILS>-RELATION_TYPE = 1.
<PIQ_RELATION_DETAILS>-PARTNER_NUM = 1.
<PIQ_RELATION_DETAILS>-RELTYPE_DES = 1.
<PIQ_RELATION_DETAILS>-FULL_NAME_TEXT = 1.
<PIQ_RELATION_DETAILS>-HOUSE_NUM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQ_RELATION_DETAILS-STREET, sy-vline,
  WA_PIQ_RELATION_DETAILS-CITY_NAME, sy-vline,
  WA_PIQ_RELATION_DETAILS-POSTAL_CODE, sy-vline,
  WA_PIQ_RELATION_DETAILS-COUNTRY_NAME, sy-vline,
  WA_PIQ_RELATION_DETAILS-LEGAL_RES, sy-vline,
  WA_PIQ_RELATION_DETAILS-EMERGENCY_CONT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQ_RELATION_DETAILS 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_RELATION_DETAILS 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_RELATION_DETAILS INTO WA_PIQ_RELATION_DETAILS.


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

*Conversion exit SXIDN, internal->external for field EMAIL_ADDR
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_RELATION_DETAILS-EMAIL_ADDR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_RELATION_DETAILS-EMAIL_ADDR.
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_RELATION_DETAILS_STR, 
RELATION_TYPE TYPE STRING,
PARTNER_NUM TYPE STRING,
RELTYPE_DES TYPE STRING,
FULL_NAME_TEXT TYPE STRING,
HOUSE_NUM TYPE STRING,
STREET TYPE STRING,
CITY_NAME TYPE STRING,
POSTAL_CODE TYPE STRING,
COUNTRY_NAME TYPE STRING,
LEGAL_RES TYPE STRING,
EMERGENCY_CONT TYPE STRING,
TELE_NUM TYPE STRING,
STUDENT_OBJID TYPE STRING,
STUD_UNIQ_KEY TYPE STRING,
EMAIL_ADDR TYPE STRING,
FULL_ADDR TYPE STRING,
RETURN_MESSAGE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQ_RELATION_DETAILS_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_RELATION_DETAILS_STR-RELATION_TYPE sy-vline 
WA_PIQ_RELATION_DETAILS_STR-PARTNER_NUM sy-vline 
WA_PIQ_RELATION_DETAILS_STR-RELTYPE_DES sy-vline 
WA_PIQ_RELATION_DETAILS_STR-FULL_NAME_TEXT sy-vline 
WA_PIQ_RELATION_DETAILS_STR-HOUSE_NUM sy-vline 
WA_PIQ_RELATION_DETAILS_STR-STREET sy-vline 
WA_PIQ_RELATION_DETAILS_STR-CITY_NAME sy-vline 
WA_PIQ_RELATION_DETAILS_STR-POSTAL_CODE sy-vline 
WA_PIQ_RELATION_DETAILS_STR-COUNTRY_NAME sy-vline 
WA_PIQ_RELATION_DETAILS_STR-LEGAL_RES sy-vline 
WA_PIQ_RELATION_DETAILS_STR-EMERGENCY_CONT sy-vline 
WA_PIQ_RELATION_DETAILS_STR-TELE_NUM sy-vline 
WA_PIQ_RELATION_DETAILS_STR-STUDENT_OBJID sy-vline 
WA_PIQ_RELATION_DETAILS_STR-STUD_UNIQ_KEY sy-vline 
WA_PIQ_RELATION_DETAILS_STR-EMAIL_ADDR sy-vline 
WA_PIQ_RELATION_DETAILS_STR-FULL_ADDR sy-vline 
WA_PIQ_RELATION_DETAILS_STR-RETURN_MESSAGE sy-vline      INTO ld_text SEPARATED BY SPACE.

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