ABAP Select data from SAP table NIC_SUMRY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NIC_SUMRY
*  INTO TABLE @DATA(IT_NIC_SUMRY2).
*--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_NIC_SUMRY INDEX 1 INTO DATA(WA_NIC_SUMRY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NIC_SUMRY>-NILIM = 1.
<NIC_SUMRY>-TEXT = 1.
<NIC_SUMRY>-UPAMT = 1.
<NIC_SUMRY>-NIPAY = 1.
<NIC_SUMRY>-NIEEP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NIC_SUMRY-EENIC, sy-vline,
  WA_NIC_SUMRY-NIERP, sy-vline,
  WA_NIC_SUMRY-ERNIC, sy-vline,
  WA_NIC_SUMRY-NIEER, sy-vline,
  WA_NIC_SUMRY-EENIR, sy-vline,
  WA_NIC_SUMRY-NIERR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NIC_SUMRY 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_NIC_SUMRY 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_NIC_SUMRY INTO WA_NIC_SUMRY.


*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_NIC_SUMRY_STR, 
NILIM TYPE STRING,
TEXT TYPE STRING,
UPAMT TYPE STRING,
NIPAY TYPE STRING,
NIEEP TYPE STRING,
EENIC TYPE STRING,
NIERP TYPE STRING,
ERNIC TYPE STRING,
NIEER TYPE STRING,
EENIR TYPE STRING,
NIERR TYPE STRING,
ERNIR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NIC_SUMRY_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_NIC_SUMRY_STR-NILIM sy-vline 
WA_NIC_SUMRY_STR-TEXT sy-vline 
WA_NIC_SUMRY_STR-UPAMT sy-vline 
WA_NIC_SUMRY_STR-NIPAY sy-vline 
WA_NIC_SUMRY_STR-NIEEP sy-vline 
WA_NIC_SUMRY_STR-EENIC sy-vline 
WA_NIC_SUMRY_STR-NIERP sy-vline 
WA_NIC_SUMRY_STR-ERNIC sy-vline 
WA_NIC_SUMRY_STR-NIEER sy-vline 
WA_NIC_SUMRY_STR-EENIR sy-vline 
WA_NIC_SUMRY_STR-NIERR sy-vline 
WA_NIC_SUMRY_STR-ERNIR sy-vline      INTO ld_text SEPARATED BY SPACE.

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