ABAP Select data from SAP table NJIT_S_MIG_PGD_CELL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NJIT_S_MIG_PGD_CELL
*  INTO TABLE @DATA(IT_NJIT_S_MIG_PGD_CELL2).
*--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_NJIT_S_MIG_PGD_CELL INDEX 1 INTO DATA(WA_NJIT_S_MIG_PGD_CELL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NJIT_S_MIG_PGD_CELL>-JITPCKG1STCELLID = 1.
<NJIT_S_MIG_PGD_CELL>-JITPCKGLASTCELLID = 1.
<NJIT_S_MIG_PGD_CELL>-JITPCKGCELLINCRMTVALUE = 1.
<NJIT_S_MIG_PGD_CELL>-JITPCKGROWSQNC = 1.
<NJIT_S_MIG_PGD_CELL>-JITPCKGQTYPERCELL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NJIT_S_MIG_PGD_CELL-QUANTITYUNIT, sy-vline,
  WA_NJIT_S_MIG_PGD_CELL-JITPCKGCNTNTTYPE, sy-vline,
  WA_NJIT_S_MIG_PGD_CELL-JITPCKGGRPDEFID, sy-vline,
  WA_NJIT_S_MIG_PGD_CELL-COMPGRPMATL, sy-vline,
  WA_NJIT_S_MIG_PGD_CELL-JITPCKGSORTSQNC, sy-vline,
  WA_NJIT_S_MIG_PGD_CELL-JITPARENTPCKGGRPDEFID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NJIT_S_MIG_PGD_CELL 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_NJIT_S_MIG_PGD_CELL 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_NJIT_S_MIG_PGD_CELL INTO WA_NJIT_S_MIG_PGD_CELL.


*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 CUNIT, internal->external for field QUANTITYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_NJIT_S_MIG_PGD_CELL-QUANTITYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NJIT_S_MIG_PGD_CELL-QUANTITYUNIT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field COMPGRPMATL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_NJIT_S_MIG_PGD_CELL-COMPGRPMATL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NJIT_S_MIG_PGD_CELL-COMPGRPMATL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field JITPARENTPCKGGRPDEFID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_NJIT_S_MIG_PGD_CELL-JITPARENTPCKGGRPDEFID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NJIT_S_MIG_PGD_CELL-JITPARENTPCKGGRPDEFID.
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_NJIT_S_MIG_PGD_CELL_STR, 
JITPCKG1STCELLID TYPE STRING,
JITPCKGLASTCELLID TYPE STRING,
JITPCKGCELLINCRMTVALUE TYPE STRING,
JITPCKGROWSQNC TYPE STRING,
JITPCKGQTYPERCELL TYPE STRING,
QUANTITYUNIT TYPE STRING,
JITPCKGCNTNTTYPE TYPE STRING,
JITPCKGGRPDEFID TYPE STRING,
COMPGRPMATL TYPE STRING,
JITPCKGSORTSQNC TYPE STRING,
JITPARENTPCKGGRPDEFID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NJIT_S_MIG_PGD_CELL_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_NJIT_S_MIG_PGD_CELL_STR-JITPCKG1STCELLID sy-vline 
WA_NJIT_S_MIG_PGD_CELL_STR-JITPCKGLASTCELLID sy-vline 
WA_NJIT_S_MIG_PGD_CELL_STR-JITPCKGCELLINCRMTVALUE sy-vline 
WA_NJIT_S_MIG_PGD_CELL_STR-JITPCKGROWSQNC sy-vline 
WA_NJIT_S_MIG_PGD_CELL_STR-JITPCKGQTYPERCELL sy-vline 
WA_NJIT_S_MIG_PGD_CELL_STR-QUANTITYUNIT sy-vline 
WA_NJIT_S_MIG_PGD_CELL_STR-JITPCKGCNTNTTYPE sy-vline 
WA_NJIT_S_MIG_PGD_CELL_STR-JITPCKGGRPDEFID sy-vline 
WA_NJIT_S_MIG_PGD_CELL_STR-COMPGRPMATL sy-vline 
WA_NJIT_S_MIG_PGD_CELL_STR-JITPCKGSORTSQNC sy-vline 
WA_NJIT_S_MIG_PGD_CELL_STR-JITPARENTPCKGGRPDEFID sy-vline      INTO ld_text SEPARATED BY SPACE.

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