ABAP Select data from SAP table RERA_PRE_TAX_ITEM_GEN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RERA_PRE_TAX_ITEM_GEN
*  INTO TABLE @DATA(IT_RERA_PRE_TAX_ITEM_GEN2).
*--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_RERA_PRE_TAX_ITEM_GEN INDEX 1 INTO DATA(WA_RERA_PRE_TAX_ITEM_GEN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RERA_PRE_TAX_ITEM_GEN>-DOCGUID = 1.
<RERA_PRE_TAX_ITEM_GEN>-ITEMNO = 1.
<RERA_PRE_TAX_ITEM_GEN>-BUKRS = 1.
<RERA_PRE_TAX_ITEM_GEN>-REFITEMNO = 1.
<RERA_PRE_TAX_ITEM_GEN>-DCINDICATOR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RERA_PRE_TAX_ITEM_GEN-ACCTYPE, sy-vline,
  WA_RERA_PRE_TAX_ITEM_GEN-GLACCSYMB, sy-vline,
  WA_RERA_PRE_TAX_ITEM_GEN-GLACCOUNT, sy-vline,
  WA_RERA_PRE_TAX_ITEM_GEN-NETAMOUNT, sy-vline,
  WA_RERA_PRE_TAX_ITEM_GEN-TAXAMOUNT, sy-vline,
  WA_RERA_PRE_TAX_ITEM_GEN-CURRENCY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RERA_PRE_TAX_ITEM_GEN 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_RERA_PRE_TAX_ITEM_GEN 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_RERA_PRE_TAX_ITEM_GEN INTO WA_RERA_PRE_TAX_ITEM_GEN.


*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 EXCRT, internal->external for field CTRATE
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_RERA_PRE_TAX_ITEM_GEN-CTRATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RERA_PRE_TAX_ITEM_GEN-CTRATE.
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_RERA_PRE_TAX_ITEM_GEN_STR, 
DOCGUID TYPE STRING,
ITEMNO TYPE STRING,
BUKRS TYPE STRING,
REFITEMNO TYPE STRING,
DCINDICATOR TYPE STRING,
ACCTYPE TYPE STRING,
GLACCSYMB TYPE STRING,
GLACCOUNT TYPE STRING,
NETAMOUNT TYPE STRING,
TAXAMOUNT TYPE STRING,
CURRENCY TYPE STRING,
CTLCNETAMOUNT TYPE STRING,
CTLCTAXAMOUNT TYPE STRING,
CTLCCURRKEY TYPE STRING,
CTFCNETAMOUNT TYPE STRING,
CTFCTAXAMOUNT TYPE STRING,
CTFCCURRKEY TYPE STRING,
TXJCD TYPE STRING,
TAXTYPE TYPE STRING,
TAXGROUP TYPE STRING,
TAXGROUPID TYPE STRING,
TAXRATE TYPE STRING,
TAXDATE TYPE STRING,
OBJNR TYPE STRING,
TXJCD_DEEP TYPE STRING,
TXJLV TYPE STRING,
CTRULE TYPE STRING,
CTDATEACT TYPE STRING,
CTDATEREQ TYPE STRING,
POSTCDCURR TYPE STRING,
CTRATE TYPE STRING,
TAXCOUNTRY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RERA_PRE_TAX_ITEM_GEN_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_RERA_PRE_TAX_ITEM_GEN_STR-DOCGUID sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-ITEMNO sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-BUKRS sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-REFITEMNO sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-DCINDICATOR sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-ACCTYPE sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-GLACCSYMB sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-GLACCOUNT sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-NETAMOUNT sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-TAXAMOUNT sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-CURRENCY sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-CTLCNETAMOUNT sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-CTLCTAXAMOUNT sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-CTLCCURRKEY sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-CTFCNETAMOUNT sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-CTFCTAXAMOUNT sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-CTFCCURRKEY sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-TXJCD sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-TAXTYPE sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-TAXGROUP sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-TAXGROUPID sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-TAXRATE sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-TAXDATE sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-OBJNR sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-TXJCD_DEEP sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-TXJLV sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-CTRULE sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-CTDATEACT sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-CTDATEREQ sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-POSTCDCURR sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-CTRATE sy-vline 
WA_RERA_PRE_TAX_ITEM_GEN_STR-TAXCOUNTRY sy-vline      INTO ld_text SEPARATED BY SPACE.

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