ABAP Select data from SAP table PJP_FORM_TAXCG_FLEX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PJP_FORM_TAXCG_FLEX
*  INTO TABLE @DATA(IT_PJP_FORM_TAXCG_FLEX2).
*--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_PJP_FORM_TAXCG_FLEX INDEX 1 INTO DATA(WA_PJP_FORM_TAXCG_FLEX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PJP_FORM_TAXCG_FLEX>-REGPAY = 1.
<PJP_FORM_TAXCG_FLEX>-FIRST = 1.
<PJP_FORM_TAXCG_FLEX>-SECOND = 1.
<PJP_FORM_TAXCG_FLEX>-THIRD = 1.
<PJP_FORM_TAXCG_FLEX>-FOURTH = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PJP_FORM_TAXCG_FLEX-FIFTH, sy-vline,
  WA_PJP_FORM_TAXCG_FLEX-STKOH, sy-vline,
  WA_PJP_FORM_TAXCG_FLEX-STOTSU, sy-vline,
  WA_PJP_FORM_TAXCG_FLEX-STHEI, sy-vline,
  WA_PJP_FORM_TAXCG_FLEX-STSONOTA, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_PJP_FORM_TAXCG_FLEX 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_PJP_FORM_TAXCG_FLEX 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_PJP_FORM_TAXCG_FLEX INTO WA_PJP_FORM_TAXCG_FLEX.


*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_PJP_FORM_TAXCG_FLEX_STR, 
REGPAY TYPE STRING,
FIRST TYPE STRING,
SECOND TYPE STRING,
THIRD TYPE STRING,
FOURTH TYPE STRING,
FIFTH TYPE STRING,
STKOH TYPE STRING,
STOTSU TYPE STRING,
STHEI TYPE STRING,
STSONOTA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PJP_FORM_TAXCG_FLEX_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_PJP_FORM_TAXCG_FLEX_STR-REGPAY sy-vline 
WA_PJP_FORM_TAXCG_FLEX_STR-FIRST sy-vline 
WA_PJP_FORM_TAXCG_FLEX_STR-SECOND sy-vline 
WA_PJP_FORM_TAXCG_FLEX_STR-THIRD sy-vline 
WA_PJP_FORM_TAXCG_FLEX_STR-FOURTH sy-vline 
WA_PJP_FORM_TAXCG_FLEX_STR-FIFTH sy-vline 
WA_PJP_FORM_TAXCG_FLEX_STR-STKOH sy-vline 
WA_PJP_FORM_TAXCG_FLEX_STR-STOTSU sy-vline 
WA_PJP_FORM_TAXCG_FLEX_STR-STHEI sy-vline 
WA_PJP_FORM_TAXCG_FLEX_STR-STSONOTA sy-vline      INTO ld_text SEPARATED BY SPACE.

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