ABAP Select data from SAP table PIQ_NL_MESSAGE04 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_MESSAGE04 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_MESSAGE04. 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_MESSAGE04 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_MESSAGE04 TYPE STANDARD TABLE OF PIQ_NL_MESSAGE04,
      WA_PIQ_NL_MESSAGE04 TYPE PIQ_NL_MESSAGE04,
      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_MESSAGE04> TYPE PIQ_NL_MESSAGE04.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PIQ_NL_MESSAGE04.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PIQ_NL_MESSAGE04
  INTO TABLE IT_PIQ_NL_MESSAGE04.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQ_NL_MESSAGE04
*  INTO TABLE @DATA(IT_PIQ_NL_MESSAGE042).
*--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_MESSAGE04 INDEX 1 INTO DATA(WA_PIQ_NL_MESSAGE042).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PIQ_NL_MESSAGE04 ASSIGNING <PIQ_NL_MESSAGE04>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQ_NL_MESSAGE04>-SOURCE = 1.
<PIQ_NL_MESSAGE04>-MSGID = 1.
<PIQ_NL_MESSAGE04>-SENDER = 1.
<PIQ_NL_MESSAGE04>-RECEIVER = 1.
<PIQ_NL_MESSAGE04>-PROCESSID = 1.

ENDLOOP.

LOOP AT IT_PIQ_NL_MESSAGE04 INTO WA_PIQ_NL_MESSAGE04.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQ_NL_MESSAGE04-FILTERCODE, sy-vline,
  WA_PIQ_NL_MESSAGE04-COMPOSITENAME, sy-vline,
  WA_PIQ_NL_MESSAGE04-FIRSTNAME, sy-vline,
  WA_PIQ_NL_MESSAGE04-NICKNAME, sy-vline,
  WA_PIQ_NL_MESSAGE04-INITIALS, sy-vline,
  WA_PIQ_NL_MESSAGE04-LASTNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQ_NL_MESSAGE04 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_MESSAGE04 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_MESSAGE04 INTO WA_PIQ_NL_MESSAGE04.


*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 SXIDN, internal->external for field EMAILADDR
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_NL_MESSAGE04-EMAILADDR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_NL_MESSAGE04-EMAILADDR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PDATE, internal->external for field DOB
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_NL_MESSAGE04-DOB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_NL_MESSAGE04-DOB.
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_MESSAGE04_STR, 
SOURCE TYPE STRING,
MSGID TYPE STRING,
SENDER TYPE STRING,
RECEIVER TYPE STRING,
PROCESSID TYPE STRING,
FILTERCODE TYPE STRING,
COMPOSITENAME TYPE STRING,
FIRSTNAME TYPE STRING,
NICKNAME TYPE STRING,
INITIALS TYPE STRING,
LASTNAME TYPE STRING,
INFIX TYPE STRING,
GBAADDRESS TYPE STRING,
COUNTRYNO TYPE STRING,
TELEPHONENO TYPE STRING,
MOBILENO TYPE STRING,
EMAILADDR TYPE STRING,
GENDER TYPE STRING,
DOB TYPE STRING,
COUNTRYOFBIRTH TYPE STRING,
MOBILECTYCODE TYPE STRING,
FOREIGNADDRESS TYPE STRING,
BIRTHPLACE TYPE STRING,
BIRTHDATEUNKNOWN TYPE STRING,
NATIONALITY TYPE STRING,
NATIONALITY2 TYPE STRING,
RESIDENCESTAT TYPE STRING,
FATHERBIRCOUN TYPE STRING,
MOTHERBIRCOUN TYPE STRING,
FORMOFRELATION TYPE STRING,
PARTNERNAME TYPE STRING,
PARTNERINFIX TYPE STRING,
STATOFCONSENT TYPE STRING,
LANGUAGE TYPE STRING,
CONFID TYPE STRING,
O_NUMBER TYPE STRING,
STUDIELINK_NO TYPE STRING,
OCW_NUMBER TYPE STRING,
SSN_NUMBER TYPE STRING,
CANCDATE TYPE STRING,
VERIFIEDSTATUS TYPE STRING,
SIGNALCODE TYPE STRING,
VERIFICATIONDATE TYPE STRING,
IDENTITYTYPE TYPE STRING,
IDENTITYPROOF TYPE STRING,
VERIFIEDBRIN TYPE STRING,
VERIFIEDINST TYPE STRING,
EMPLOYEE TYPE STRING,
VERIFY_COMMENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQ_NL_MESSAGE04_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_MESSAGE04_STR-SOURCE sy-vline 
WA_PIQ_NL_MESSAGE04_STR-MSGID sy-vline 
WA_PIQ_NL_MESSAGE04_STR-SENDER sy-vline 
WA_PIQ_NL_MESSAGE04_STR-RECEIVER sy-vline 
WA_PIQ_NL_MESSAGE04_STR-PROCESSID sy-vline 
WA_PIQ_NL_MESSAGE04_STR-FILTERCODE sy-vline 
WA_PIQ_NL_MESSAGE04_STR-COMPOSITENAME sy-vline 
WA_PIQ_NL_MESSAGE04_STR-FIRSTNAME sy-vline 
WA_PIQ_NL_MESSAGE04_STR-NICKNAME sy-vline 
WA_PIQ_NL_MESSAGE04_STR-INITIALS sy-vline 
WA_PIQ_NL_MESSAGE04_STR-LASTNAME sy-vline 
WA_PIQ_NL_MESSAGE04_STR-INFIX sy-vline 
WA_PIQ_NL_MESSAGE04_STR-GBAADDRESS sy-vline 
WA_PIQ_NL_MESSAGE04_STR-COUNTRYNO sy-vline 
WA_PIQ_NL_MESSAGE04_STR-TELEPHONENO sy-vline 
WA_PIQ_NL_MESSAGE04_STR-MOBILENO sy-vline 
WA_PIQ_NL_MESSAGE04_STR-EMAILADDR sy-vline 
WA_PIQ_NL_MESSAGE04_STR-GENDER sy-vline 
WA_PIQ_NL_MESSAGE04_STR-DOB sy-vline 
WA_PIQ_NL_MESSAGE04_STR-COUNTRYOFBIRTH sy-vline 
WA_PIQ_NL_MESSAGE04_STR-MOBILECTYCODE sy-vline 
WA_PIQ_NL_MESSAGE04_STR-FOREIGNADDRESS sy-vline 
WA_PIQ_NL_MESSAGE04_STR-BIRTHPLACE sy-vline 
WA_PIQ_NL_MESSAGE04_STR-BIRTHDATEUNKNOWN sy-vline 
WA_PIQ_NL_MESSAGE04_STR-NATIONALITY sy-vline 
WA_PIQ_NL_MESSAGE04_STR-NATIONALITY2 sy-vline 
WA_PIQ_NL_MESSAGE04_STR-RESIDENCESTAT sy-vline 
WA_PIQ_NL_MESSAGE04_STR-FATHERBIRCOUN sy-vline 
WA_PIQ_NL_MESSAGE04_STR-MOTHERBIRCOUN sy-vline 
WA_PIQ_NL_MESSAGE04_STR-FORMOFRELATION sy-vline 
WA_PIQ_NL_MESSAGE04_STR-PARTNERNAME sy-vline 
WA_PIQ_NL_MESSAGE04_STR-PARTNERINFIX sy-vline 
WA_PIQ_NL_MESSAGE04_STR-STATOFCONSENT sy-vline 
WA_PIQ_NL_MESSAGE04_STR-LANGUAGE sy-vline 
WA_PIQ_NL_MESSAGE04_STR-CONFID sy-vline 
WA_PIQ_NL_MESSAGE04_STR-O_NUMBER sy-vline 
WA_PIQ_NL_MESSAGE04_STR-STUDIELINK_NO sy-vline 
WA_PIQ_NL_MESSAGE04_STR-OCW_NUMBER sy-vline 
WA_PIQ_NL_MESSAGE04_STR-SSN_NUMBER sy-vline 
WA_PIQ_NL_MESSAGE04_STR-CANCDATE sy-vline 
WA_PIQ_NL_MESSAGE04_STR-VERIFIEDSTATUS sy-vline 
WA_PIQ_NL_MESSAGE04_STR-SIGNALCODE sy-vline 
WA_PIQ_NL_MESSAGE04_STR-VERIFICATIONDATE sy-vline 
WA_PIQ_NL_MESSAGE04_STR-IDENTITYTYPE sy-vline 
WA_PIQ_NL_MESSAGE04_STR-IDENTITYPROOF sy-vline 
WA_PIQ_NL_MESSAGE04_STR-VERIFIEDBRIN sy-vline 
WA_PIQ_NL_MESSAGE04_STR-VERIFIEDINST sy-vline 
WA_PIQ_NL_MESSAGE04_STR-EMPLOYEE sy-vline 
WA_PIQ_NL_MESSAGE04_STR-VERIFY_COMMENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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