ABAP Select data from SAP table PIQAGR_ELEMENT_BUFFER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQAGR_ELEMENT_BUFFER
*  INTO TABLE @DATA(IT_PIQAGR_ELEMENT_BUFFER2).
*--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_PIQAGR_ELEMENT_BUFFER INDEX 1 INTO DATA(WA_PIQAGR_ELEMENT_BUFFER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQAGR_ELEMENT_BUFFER>-INDX = 1.
<PIQAGR_ELEMENT_BUFFER>-AGRID = 1.
<PIQAGR_ELEMENT_BUFFER>-AGRELEID = 1.
<PIQAGR_ELEMENT_BUFFER>-ELEM_ID = 1.
<PIQAGR_ELEMENT_BUFFER>-AGRRANK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQAGR_ELEMENT_BUFFER-AGRWEIGHT, sy-vline,
  WA_PIQAGR_ELEMENT_BUFFER-AGRPLVAR, sy-vline,
  WA_PIQAGR_ELEMENT_BUFFER-AGROTYPE, sy-vline,
  WA_PIQAGR_ELEMENT_BUFFER-AGRREALO, sy-vline,
  WA_PIQAGR_ELEMENT_BUFFER-AGRELEAGRID, sy-vline,
  WA_PIQAGR_ELEMENT_BUFFER-GRADESYM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQAGR_ELEMENT_BUFFER 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_PIQAGR_ELEMENT_BUFFER 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_PIQAGR_ELEMENT_BUFFER INTO WA_PIQAGR_ELEMENT_BUFFER.


*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 ISOLA, internal->external for field LANGUTXT
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_PIQAGR_ELEMENT_BUFFER-LANGUTXT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQAGR_ELEMENT_BUFFER-LANGUTXT.
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_PIQAGR_ELEMENT_BUFFER_STR, 
INDX TYPE STRING,
AGRID TYPE STRING,
AGRELEID TYPE STRING,
ELEM_ID TYPE STRING,
AGRRANK TYPE STRING,
AGRWEIGHT TYPE STRING,
AGRPLVAR TYPE STRING,
AGROTYPE TYPE STRING,
AGRREALO TYPE STRING,
AGRELEAGRID TYPE STRING,
GRADESYM TYPE STRING,
GRADE TYPE STRING,
GRADESCALE TYPE STRING,
AGRNOTRATED TYPE STRING,
AGRDATE TYPE STRING,
AGRCOMPLETED TYPE STRING,
NOTEID TYPE STRING,
REGNUM TYPE STRING,
GRADECHANGED TYPE STRING,
PUBLICATIONDATE TYPE STRING,
LANGUTXT TYPE STRING,
AGRTEXTTXT TYPE STRING,
GRADINGSCALET TYPE STRING,
LFNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQAGR_ELEMENT_BUFFER_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_PIQAGR_ELEMENT_BUFFER_STR-INDX sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-AGRID sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-AGRELEID sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-ELEM_ID sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-AGRRANK sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-AGRWEIGHT sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-AGRPLVAR sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-AGROTYPE sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-AGRREALO sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-AGRELEAGRID sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-GRADESYM sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-GRADE sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-GRADESCALE sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-AGRNOTRATED sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-AGRDATE sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-AGRCOMPLETED sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-NOTEID sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-REGNUM sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-GRADECHANGED sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-PUBLICATIONDATE sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-LANGUTXT sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-AGRTEXTTXT sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-GRADINGSCALET sy-vline 
WA_PIQAGR_ELEMENT_BUFFER_STR-LFNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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