ABAP Select data from SAP table FIAR_GS_PUR_FILE_P into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FIAR_GS_PUR_FILE_P
*  INTO TABLE @DATA(IT_FIAR_GS_PUR_FILE_P2).
*--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_FIAR_GS_PUR_FILE_P INDEX 1 INTO DATA(WA_FIAR_GS_PUR_FILE_P2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FIAR_GS_PUR_FILE_P>-REC_TYPE = 1.
<FIAR_GS_PUR_FILE_P>-PERIOD = 1.
<FIAR_GS_PUR_FILE_P>-REFILL1 = 1.
<FIAR_GS_PUR_FILE_P>-NUM_REC_TYP1 = 1.
<FIAR_GS_PUR_FILE_P>-REFILL2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FIAR_GS_PUR_FILE_P-CC_TAX_NUM, sy-vline,
  WA_FIAR_GS_PUR_FILE_P-REFILL3, sy-vline,
  WA_FIAR_GS_PUR_FILE_P-TOTAL_AMNT, sy-vline,
  WA_FIAR_GS_PUR_FILE_P-CONC_AMNT, sy-vline,
  WA_FIAR_GS_PUR_FILE_P-TAXABLE_AMNT, sy-vline,
  WA_FIAR_GS_PUR_FILE_P-REFILL4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FIAR_GS_PUR_FILE_P 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_FIAR_GS_PUR_FILE_P 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_FIAR_GS_PUR_FILE_P INTO WA_FIAR_GS_PUR_FILE_P.


*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_FIAR_GS_PUR_FILE_P_STR, 
REC_TYPE TYPE STRING,
PERIOD TYPE STRING,
REFILL1 TYPE STRING,
NUM_REC_TYP1 TYPE STRING,
REFILL2 TYPE STRING,
CC_TAX_NUM TYPE STRING,
REFILL3 TYPE STRING,
TOTAL_AMNT TYPE STRING,
CONC_AMNT TYPE STRING,
TAXABLE_AMNT TYPE STRING,
REFILL4 TYPE STRING,
DTR_VAT_AMNT TYPE STRING,
EXEMPT_AMNT TYPE STRING,
PERC_VAT_AMNT TYPE STRING,
PERC_OTHNT_AMNT TYPE STRING,
GI_PERC_AMNT TYPE STRING,
MT_PERC_AMNT TYPE STRING,
INT_TAX_AMNT TYPE STRING,
REFILL5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FIAR_GS_PUR_FILE_P_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_FIAR_GS_PUR_FILE_P_STR-REC_TYPE sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-PERIOD sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-REFILL1 sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-NUM_REC_TYP1 sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-REFILL2 sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-CC_TAX_NUM sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-REFILL3 sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-TOTAL_AMNT sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-CONC_AMNT sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-TAXABLE_AMNT sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-REFILL4 sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-DTR_VAT_AMNT sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-EXEMPT_AMNT sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-PERC_VAT_AMNT sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-PERC_OTHNT_AMNT sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-GI_PERC_AMNT sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-MT_PERC_AMNT sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-INT_TAX_AMNT sy-vline 
WA_FIAR_GS_PUR_FILE_P_STR-REFILL5 sy-vline      INTO ld_text SEPARATED BY SPACE.

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