ABAP Select data from SAP table PIQ_HEADER_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_HEADER_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_HEADER_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_HEADER_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_HEADER_DETAILS TYPE STANDARD TABLE OF PIQ_HEADER_DETAILS,
      WA_PIQ_HEADER_DETAILS TYPE PIQ_HEADER_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_HEADER_DETAILS> TYPE PIQ_HEADER_DETAILS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQ_HEADER_DETAILS
*  INTO TABLE @DATA(IT_PIQ_HEADER_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_HEADER_DETAILS INDEX 1 INTO DATA(WA_PIQ_HEADER_DETAILS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQ_HEADER_DETAILS>-STUDENT_NUMBER = 1.
<PIQ_HEADER_DETAILS>-TITLE_KEY = 1.
<PIQ_HEADER_DETAILS>-TITLE_TEXT = 1.
<PIQ_HEADER_DETAILS>-INITIALS = 1.
<PIQ_HEADER_DETAILS>-KNOWN_AS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQ_HEADER_DETAILS-TEL_NUMBER, sy-vline,
  WA_PIQ_HEADER_DETAILS-MOB_NUMBER, sy-vline,
  WA_PIQ_HEADER_DETAILS-PRIMARY_EMAIL, sy-vline,
  WA_PIQ_HEADER_DETAILS-UNIVERSITY_EMAIL, sy-vline,
  WA_PIQ_HEADER_DETAILS-PHOTO_URI, sy-vline,
  WA_PIQ_HEADER_DETAILS-FACULTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQ_HEADER_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_HEADER_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_HEADER_DETAILS INTO WA_PIQ_HEADER_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 PIQST, internal->external for field STUDENT_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_PIQST_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_HEADER_DETAILS-STUDENT_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_HEADER_DETAILS-STUDENT_NUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field PRIMARY_EMAIL
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_HEADER_DETAILS-PRIMARY_EMAIL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_HEADER_DETAILS-PRIMARY_EMAIL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field UNIVERSITY_EMAIL
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_HEADER_DETAILS-UNIVERSITY_EMAIL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_HEADER_DETAILS-UNIVERSITY_EMAIL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field CONTACT_STUDENT_OFFICE
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_HEADER_DETAILS-CONTACT_STUDENT_OFFICE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_HEADER_DETAILS-CONTACT_STUDENT_OFFICE.
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_HEADER_DETAILS_STR, 
STUDENT_NUMBER TYPE STRING,
TITLE_KEY TYPE STRING,
TITLE_TEXT TYPE STRING,
INITIALS TYPE STRING,
KNOWN_AS TYPE STRING,
TEL_NUMBER TYPE STRING,
MOB_NUMBER TYPE STRING,
PRIMARY_EMAIL TYPE STRING,
UNIVERSITY_EMAIL TYPE STRING,
PHOTO_URI TYPE STRING,
FACULTY TYPE STRING,
ADVISOR TYPE STRING,
PROGRAM_OF_STUDY TYPE STRING,
FACEBOOK_HANDLE TYPE STRING,
TWITTER_HANDLE TYPE STRING,
STUDENT_OBJID TYPE STRING,
ADVISOR_PERNR TYPE STRING,
CONTACT_STUDENT_OFFICE TYPE STRING,
NAME TYPE STRING,
ORG_UNIT_ID TYPE STRING,
FACEBOOK_LINK TYPE STRING,
TWITTER_LINK TYPE STRING,
COUNTRY_TEL TYPE STRING,
COUNTRY_MOB TYPE STRING,
DO_NOT_TEL_NUM TYPE STRING,
DO_NOT_MOB_NUM TYPE STRING,
DO_NOT_PRIM_EMAIL TYPE STRING,
DO_NOT_UNVI_EMAIL TYPE STRING,
TEL_NUM_SMS_ENABLE TYPE STRING,
MOB_NUM_SMS_ENABLE TYPE STRING,
TEL_ID TYPE STRING,
MOB_ID TYPE STRING,
EMAIL_IDENTIFIER TYPE STRING,
UNIV_URL_NAME TYPE STRING,
UNIV_URL TYPE STRING,
RETURN_MESSAGE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQ_HEADER_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_HEADER_DETAILS_STR-STUDENT_NUMBER sy-vline 
WA_PIQ_HEADER_DETAILS_STR-TITLE_KEY sy-vline 
WA_PIQ_HEADER_DETAILS_STR-TITLE_TEXT sy-vline 
WA_PIQ_HEADER_DETAILS_STR-INITIALS sy-vline 
WA_PIQ_HEADER_DETAILS_STR-KNOWN_AS sy-vline 
WA_PIQ_HEADER_DETAILS_STR-TEL_NUMBER sy-vline 
WA_PIQ_HEADER_DETAILS_STR-MOB_NUMBER sy-vline 
WA_PIQ_HEADER_DETAILS_STR-PRIMARY_EMAIL sy-vline 
WA_PIQ_HEADER_DETAILS_STR-UNIVERSITY_EMAIL sy-vline 
WA_PIQ_HEADER_DETAILS_STR-PHOTO_URI sy-vline 
WA_PIQ_HEADER_DETAILS_STR-FACULTY sy-vline 
WA_PIQ_HEADER_DETAILS_STR-ADVISOR sy-vline 
WA_PIQ_HEADER_DETAILS_STR-PROGRAM_OF_STUDY sy-vline 
WA_PIQ_HEADER_DETAILS_STR-FACEBOOK_HANDLE sy-vline 
WA_PIQ_HEADER_DETAILS_STR-TWITTER_HANDLE sy-vline 
WA_PIQ_HEADER_DETAILS_STR-STUDENT_OBJID sy-vline 
WA_PIQ_HEADER_DETAILS_STR-ADVISOR_PERNR sy-vline 
WA_PIQ_HEADER_DETAILS_STR-CONTACT_STUDENT_OFFICE sy-vline 
WA_PIQ_HEADER_DETAILS_STR-NAME sy-vline 
WA_PIQ_HEADER_DETAILS_STR-ORG_UNIT_ID sy-vline 
WA_PIQ_HEADER_DETAILS_STR-FACEBOOK_LINK sy-vline 
WA_PIQ_HEADER_DETAILS_STR-TWITTER_LINK sy-vline 
WA_PIQ_HEADER_DETAILS_STR-COUNTRY_TEL sy-vline 
WA_PIQ_HEADER_DETAILS_STR-COUNTRY_MOB sy-vline 
WA_PIQ_HEADER_DETAILS_STR-DO_NOT_TEL_NUM sy-vline 
WA_PIQ_HEADER_DETAILS_STR-DO_NOT_MOB_NUM sy-vline 
WA_PIQ_HEADER_DETAILS_STR-DO_NOT_PRIM_EMAIL sy-vline 
WA_PIQ_HEADER_DETAILS_STR-DO_NOT_UNVI_EMAIL sy-vline 
WA_PIQ_HEADER_DETAILS_STR-TEL_NUM_SMS_ENABLE sy-vline 
WA_PIQ_HEADER_DETAILS_STR-MOB_NUM_SMS_ENABLE sy-vline 
WA_PIQ_HEADER_DETAILS_STR-TEL_ID sy-vline 
WA_PIQ_HEADER_DETAILS_STR-MOB_ID sy-vline 
WA_PIQ_HEADER_DETAILS_STR-EMAIL_IDENTIFIER sy-vline 
WA_PIQ_HEADER_DETAILS_STR-UNIV_URL_NAME sy-vline 
WA_PIQ_HEADER_DETAILS_STR-UNIV_URL sy-vline 
WA_PIQ_HEADER_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.