ABAP Select data from SAP table P18_NEMPRI_CL_DATA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P18_NEMPRI_CL_DATA 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 P18_NEMPRI_CL_DATA. 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 P18_NEMPRI_CL_DATA 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_P18_NEMPRI_CL_DATA TYPE STANDARD TABLE OF P18_NEMPRI_CL_DATA,
      WA_P18_NEMPRI_CL_DATA TYPE P18_NEMPRI_CL_DATA,
      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: <P18_NEMPRI_CL_DATA> TYPE P18_NEMPRI_CL_DATA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P18_NEMPRI_CL_DATA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P18_NEMPRI_CL_DATA
  INTO TABLE IT_P18_NEMPRI_CL_DATA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P18_NEMPRI_CL_DATA
*  INTO TABLE @DATA(IT_P18_NEMPRI_CL_DATA2).
*--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_P18_NEMPRI_CL_DATA INDEX 1 INTO DATA(WA_P18_NEMPRI_CL_DATA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P18_NEMPRI_CL_DATA ASSIGNING <P18_NEMPRI_CL_DATA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P18_NEMPRI_CL_DATA>-PERNR = 1.
<P18_NEMPRI_CL_DATA>-BATYP = 1.
<P18_NEMPRI_CL_DATA>-CERID = 1.
<P18_NEMPRI_CL_DATA>-BEGDA = 1.
<P18_NEMPRI_CL_DATA>-ENDDA = 1.

ENDLOOP.

LOOP AT IT_P18_NEMPRI_CL_DATA INTO WA_P18_NEMPRI_CL_DATA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P18_NEMPRI_CL_DATA-CTYPE, sy-vline,
  WA_P18_NEMPRI_CL_DATA-CTRAN, sy-vline,
  WA_P18_NEMPRI_CL_DATA-CSTAT, sy-vline,
  WA_P18_NEMPRI_CL_DATA-HISTO, sy-vline,
  WA_P18_NEMPRI_CL_DATA-AEDTM, sy-vline,
  WA_P18_NEMPRI_CL_DATA-SEKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P18_NEMPRI_CL_DATA 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_P18_NEMPRI_CL_DATA 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_P18_NEMPRI_CL_DATA INTO WA_P18_NEMPRI_CL_DATA.


*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_P18_NEMPRI_CL_DATA_STR, 
PERNR TYPE STRING,
BATYP TYPE STRING,
CERID TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
CTYPE TYPE STRING,
CTRAN TYPE STRING,
CSTAT TYPE STRING,
HISTO TYPE STRING,
AEDTM TYPE STRING,
SEKEY TYPE STRING,
UNAME TYPE STRING,
REPID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P18_NEMPRI_CL_DATA_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_P18_NEMPRI_CL_DATA_STR-PERNR sy-vline 
WA_P18_NEMPRI_CL_DATA_STR-BATYP sy-vline 
WA_P18_NEMPRI_CL_DATA_STR-CERID sy-vline 
WA_P18_NEMPRI_CL_DATA_STR-BEGDA sy-vline 
WA_P18_NEMPRI_CL_DATA_STR-ENDDA sy-vline 
WA_P18_NEMPRI_CL_DATA_STR-CTYPE sy-vline 
WA_P18_NEMPRI_CL_DATA_STR-CTRAN sy-vline 
WA_P18_NEMPRI_CL_DATA_STR-CSTAT sy-vline 
WA_P18_NEMPRI_CL_DATA_STR-HISTO sy-vline 
WA_P18_NEMPRI_CL_DATA_STR-AEDTM sy-vline 
WA_P18_NEMPRI_CL_DATA_STR-SEKEY sy-vline 
WA_P18_NEMPRI_CL_DATA_STR-UNAME sy-vline 
WA_P18_NEMPRI_CL_DATA_STR-REPID sy-vline      INTO ld_text SEPARATED BY SPACE.

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