ABAP Select data from SAP table J_1IG_IMPG_INWD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_1IG_IMPG_INWD 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 J_1IG_IMPG_INWD. 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 J_1IG_IMPG_INWD 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_J_1IG_IMPG_INWD TYPE STANDARD TABLE OF J_1IG_IMPG_INWD,
      WA_J_1IG_IMPG_INWD TYPE J_1IG_IMPG_INWD,
      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: <J_1IG_IMPG_INWD> TYPE J_1IG_IMPG_INWD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_1IG_IMPG_INWD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_1IG_IMPG_INWD
  INTO TABLE IT_J_1IG_IMPG_INWD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_1IG_IMPG_INWD
*  INTO TABLE @DATA(IT_J_1IG_IMPG_INWD2).
*--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_J_1IG_IMPG_INWD INDEX 1 INTO DATA(WA_J_1IG_IMPG_INWD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_1IG_IMPG_INWD ASSIGNING <J_1IG_IMPG_INWD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_1IG_IMPG_INWD>-GSTIN = 1.
<J_1IG_IMPG_INWD>-FP = 1.
<J_1IG_IMPG_INWD>-SUPPGSTIN = 1.
<J_1IG_IMPG_INWD>-CNAME = 1.
<J_1IG_IMPG_INWD>-BOENUM = 1.

ENDLOOP.

LOOP AT IT_J_1IG_IMPG_INWD INTO WA_J_1IG_IMPG_INWD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_1IG_IMPG_INWD-BOEDT, sy-vline,
  WA_J_1IG_IMPG_INWD-BOEVAL, sy-vline,
  WA_J_1IG_IMPG_INWD-PORTCODE, sy-vline,
  WA_J_1IG_IMPG_INWD-NUM, sy-vline,
  WA_J_1IG_IMPG_INWD-TAXBASE, sy-vline,
  WA_J_1IG_IMPG_INWD-QUANTITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_1IG_IMPG_INWD 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_J_1IG_IMPG_INWD 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_J_1IG_IMPG_INWD INTO WA_J_1IG_IMPG_INWD.


*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_J_1IG_IMPG_INWD_STR, 
GSTIN TYPE STRING,
FP TYPE STRING,
SUPPGSTIN TYPE STRING,
CNAME TYPE STRING,
BOENUM TYPE STRING,
BOEDT TYPE STRING,
BOEVAL TYPE STRING,
PORTCODE TYPE STRING,
NUM TYPE STRING,
TAXBASE TYPE STRING,
QUANTITY TYPE STRING,
UQC TYPE STRING,
ELG TYPE STRING,
IGSTRATE TYPE STRING,
IGSTAMT TYPE STRING,
CGSTRATE TYPE STRING,
CGSTAMT TYPE STRING,
SGSTRATE TYPE STRING,
SGSTAMT TYPE STRING,
CESSRATE TYPE STRING,
CESSAMT TYPE STRING,
INVDET TYPE STRING,
HSN_SAC TYPE STRING,
TYOFSERV TYPE STRING,
GLCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_1IG_IMPG_INWD_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_J_1IG_IMPG_INWD_STR-GSTIN sy-vline 
WA_J_1IG_IMPG_INWD_STR-FP sy-vline 
WA_J_1IG_IMPG_INWD_STR-SUPPGSTIN sy-vline 
WA_J_1IG_IMPG_INWD_STR-CNAME sy-vline 
WA_J_1IG_IMPG_INWD_STR-BOENUM sy-vline 
WA_J_1IG_IMPG_INWD_STR-BOEDT sy-vline 
WA_J_1IG_IMPG_INWD_STR-BOEVAL sy-vline 
WA_J_1IG_IMPG_INWD_STR-PORTCODE sy-vline 
WA_J_1IG_IMPG_INWD_STR-NUM sy-vline 
WA_J_1IG_IMPG_INWD_STR-TAXBASE sy-vline 
WA_J_1IG_IMPG_INWD_STR-QUANTITY sy-vline 
WA_J_1IG_IMPG_INWD_STR-UQC sy-vline 
WA_J_1IG_IMPG_INWD_STR-ELG sy-vline 
WA_J_1IG_IMPG_INWD_STR-IGSTRATE sy-vline 
WA_J_1IG_IMPG_INWD_STR-IGSTAMT sy-vline 
WA_J_1IG_IMPG_INWD_STR-CGSTRATE sy-vline 
WA_J_1IG_IMPG_INWD_STR-CGSTAMT sy-vline 
WA_J_1IG_IMPG_INWD_STR-SGSTRATE sy-vline 
WA_J_1IG_IMPG_INWD_STR-SGSTAMT sy-vline 
WA_J_1IG_IMPG_INWD_STR-CESSRATE sy-vline 
WA_J_1IG_IMPG_INWD_STR-CESSAMT sy-vline 
WA_J_1IG_IMPG_INWD_STR-INVDET sy-vline 
WA_J_1IG_IMPG_INWD_STR-HSN_SAC sy-vline 
WA_J_1IG_IMPG_INWD_STR-TYOFSERV sy-vline 
WA_J_1IG_IMPG_INWD_STR-GLCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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