ABAP Select data from SAP table /GSINS/NLG_INA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /GSINS/NLG_INA 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 /GSINS/NLG_INA. 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 /GSINS/NLG_INA 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_/GSINS/NLG_INA TYPE STANDARD TABLE OF /GSINS/NLG_INA,
      WA_/GSINS/NLG_INA TYPE /GSINS/NLG_INA,
      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: </GSINS/NLG_INA> TYPE /GSINS/NLG_INA.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /GSINS/NLG_INA
  INTO TABLE IT_/GSINS/NLG_INA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /GSINS/NLG_INA
*  INTO TABLE @DATA(IT_/GSINS/NLG_INA2).
*--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_/GSINS/NLG_INA INDEX 1 INTO DATA(WA_/GSINS/NLG_INA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/GSINS/NLG_INA ASSIGNING </GSINS/NLG_INA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</GSINS/NLG_INA>-MANDT = 1.
</GSINS/NLG_INA>-MSG_SEQ_NUMBER = 1.
</GSINS/NLG_INA>-OWN_REF = 1.
</GSINS/NLG_INA>-CROSS_REF = 1.
</GSINS/NLG_INA>-OWN_REF2 = 1.

ENDLOOP.

LOOP AT IT_/GSINS/NLG_INA INTO WA_/GSINS/NLG_INA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/GSINS/NLG_INA-DELIVERY_TIME, sy-vline,
  WA_/GSINS/NLG_INA-MSG_TYPE, sy-vline,
  WA_/GSINS/NLG_INA-SENDER, sy-vline,
  WA_/GSINS/NLG_INA-A_NUMBER, sy-vline,
  WA_/GSINS/NLG_INA-USER_ID, sy-vline,
  WA_/GSINS/NLG_INA-MSG_COMMENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/GSINS/NLG_INA 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_/GSINS/NLG_INA 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_/GSINS/NLG_INA INTO WA_/GSINS/NLG_INA.


*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 ALPHA, internal->external for field BP_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/GSINS/NLG_INA-BP_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/GSINS/NLG_INA-BP_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTAM, internal->external for field CREATION_TIME
CALL FUNCTION 'CONVERSION_EXIT_TSTAM_OUTPUT'
  EXPORTING
    input =                      WA_/GSINS/NLG_INA-CREATION_TIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/GSINS/NLG_INA-CREATION_TIME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTAM, internal->external for field CHANGE_TIME
CALL FUNCTION 'CONVERSION_EXIT_TSTAM_OUTPUT'
  EXPORTING
    input =                      WA_/GSINS/NLG_INA-CHANGE_TIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/GSINS/NLG_INA-CHANGE_TIME.
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_/GSINS/NLG_INA_STR, 
MANDT TYPE STRING,
MSG_SEQ_NUMBER TYPE STRING,
OWN_REF TYPE STRING,
CROSS_REF TYPE STRING,
OWN_REF2 TYPE STRING,
DELIVERY_TIME TYPE STRING,
MSG_TYPE TYPE STRING,
SENDER TYPE STRING,
A_NUMBER TYPE STRING,
USER_ID TYPE STRING,
MSG_COMMENT TYPE STRING,
STATUS_PL TYPE STRING,
MSG_DATE TYPE STRING,
ERROR_REASON TYPE STRING,
MUNIC_CODE TYPE STRING,
INT_CUST_IND TYPE STRING,
BSN_NUM TYPE STRING,
MSGACTION TYPE STRING,
APP_STATUS TYPE STRING,
BP_ID TYPE STRING,
FORMER_MSG TYPE STRING,
CREATION_USER TYPE STRING,
CREATION_TIME TYPE STRING,
CHANGE_USER TYPE STRING,
CHANGE_TIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/GSINS/NLG_INA_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_/GSINS/NLG_INA_STR-MANDT sy-vline 
WA_/GSINS/NLG_INA_STR-MSG_SEQ_NUMBER sy-vline 
WA_/GSINS/NLG_INA_STR-OWN_REF sy-vline 
WA_/GSINS/NLG_INA_STR-CROSS_REF sy-vline 
WA_/GSINS/NLG_INA_STR-OWN_REF2 sy-vline 
WA_/GSINS/NLG_INA_STR-DELIVERY_TIME sy-vline 
WA_/GSINS/NLG_INA_STR-MSG_TYPE sy-vline 
WA_/GSINS/NLG_INA_STR-SENDER sy-vline 
WA_/GSINS/NLG_INA_STR-A_NUMBER sy-vline 
WA_/GSINS/NLG_INA_STR-USER_ID sy-vline 
WA_/GSINS/NLG_INA_STR-MSG_COMMENT sy-vline 
WA_/GSINS/NLG_INA_STR-STATUS_PL sy-vline 
WA_/GSINS/NLG_INA_STR-MSG_DATE sy-vline 
WA_/GSINS/NLG_INA_STR-ERROR_REASON sy-vline 
WA_/GSINS/NLG_INA_STR-MUNIC_CODE sy-vline 
WA_/GSINS/NLG_INA_STR-INT_CUST_IND sy-vline 
WA_/GSINS/NLG_INA_STR-BSN_NUM sy-vline 
WA_/GSINS/NLG_INA_STR-MSGACTION sy-vline 
WA_/GSINS/NLG_INA_STR-APP_STATUS sy-vline 
WA_/GSINS/NLG_INA_STR-BP_ID sy-vline 
WA_/GSINS/NLG_INA_STR-FORMER_MSG sy-vline 
WA_/GSINS/NLG_INA_STR-CREATION_USER sy-vline 
WA_/GSINS/NLG_INA_STR-CREATION_TIME sy-vline 
WA_/GSINS/NLG_INA_STR-CHANGE_USER sy-vline 
WA_/GSINS/NLG_INA_STR-CHANGE_TIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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