ABAP Select data from SAP table PIQNF_DETAILINFO into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQNF_DETAILINFO
*  INTO TABLE @DATA(IT_PIQNF_DETAILINFO2).
*--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_PIQNF_DETAILINFO INDEX 1 INTO DATA(WA_PIQNF_DETAILINFO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQNF_DETAILINFO>-PLVAR = 1.
<PIQNF_DETAILINFO>-OTYPE = 1.
<PIQNF_DETAILINFO>-OBJID = 1.
<PIQNF_DETAILINFO>-BEGDA = 1.
<PIQNF_DETAILINFO>-ENDDA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQNF_DETAILINFO-ISTAT, sy-vline,
  WA_PIQNF_DETAILINFO-HISTO, sy-vline,
  WA_PIQNF_DETAILINFO-SHORT, sy-vline,
  WA_PIQNF_DETAILINFO-STEXT, sy-vline,
  WA_PIQNF_DETAILINFO-REALO, sy-vline,
  WA_PIQNF_DETAILINFO-NF_SELDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQNF_DETAILINFO 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_PIQNF_DETAILINFO 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_PIQNF_DETAILINFO INTO WA_PIQNF_DETAILINFO.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PIQNF_DETAILINFO_STR, 
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
ISTAT TYPE STRING,
HISTO TYPE STRING,
SHORT TYPE STRING,
STEXT TYPE STRING,
REALO TYPE STRING,
NF_SELDATE TYPE STRING,
REFR TYPE STRING,
DT_CHANGEMODE TYPE STRING,
SCENARIO TYPE STRING,
TABTYPE TYPE STRING,
PERIOD TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
UPD_PERIOD TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
DETAIL_DATE TYPE STRING,
DATES_CHANGED TYPE STRING,
SELDATE_MODE TYPE STRING,
INPUT_DONE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQNF_DETAILINFO_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_PIQNF_DETAILINFO_STR-PLVAR sy-vline 
WA_PIQNF_DETAILINFO_STR-OTYPE sy-vline 
WA_PIQNF_DETAILINFO_STR-OBJID sy-vline 
WA_PIQNF_DETAILINFO_STR-BEGDA sy-vline 
WA_PIQNF_DETAILINFO_STR-ENDDA sy-vline 
WA_PIQNF_DETAILINFO_STR-ISTAT sy-vline 
WA_PIQNF_DETAILINFO_STR-HISTO sy-vline 
WA_PIQNF_DETAILINFO_STR-SHORT sy-vline 
WA_PIQNF_DETAILINFO_STR-STEXT sy-vline 
WA_PIQNF_DETAILINFO_STR-REALO sy-vline 
WA_PIQNF_DETAILINFO_STR-NF_SELDATE sy-vline 
WA_PIQNF_DETAILINFO_STR-REFR sy-vline 
WA_PIQNF_DETAILINFO_STR-DT_CHANGEMODE sy-vline 
WA_PIQNF_DETAILINFO_STR-SCENARIO sy-vline 
WA_PIQNF_DETAILINFO_STR-TABTYPE sy-vline 
WA_PIQNF_DETAILINFO_STR-PERIOD sy-vline 
WA_PIQNF_DETAILINFO_STR-BEGDA sy-vline 
WA_PIQNF_DETAILINFO_STR-ENDDA sy-vline 
WA_PIQNF_DETAILINFO_STR-UPD_PERIOD sy-vline 
WA_PIQNF_DETAILINFO_STR-BEGDA sy-vline 
WA_PIQNF_DETAILINFO_STR-ENDDA sy-vline 
WA_PIQNF_DETAILINFO_STR-DETAIL_DATE sy-vline 
WA_PIQNF_DETAILINFO_STR-DATES_CHANGED sy-vline 
WA_PIQNF_DETAILINFO_STR-SELDATE_MODE sy-vline 
WA_PIQNF_DETAILINFO_STR-INPUT_DONE sy-vline      INTO ld_text SEPARATED BY SPACE.

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