ABAP Select data from SAP table TRFV_CL_POS_FLOW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRFV_CL_POS_FLOW
*  INTO TABLE @DATA(IT_TRFV_CL_POS_FLOW2).
*--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_TRFV_CL_POS_FLOW INDEX 1 INTO DATA(WA_TRFV_CL_POS_FLOW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRFV_CL_POS_FLOW>-MANDT = 1.
<TRFV_CL_POS_FLOW>-FLOW_GUID = 1.
<TRFV_CL_POS_FLOW>-SUBTRANS_GUID = 1.
<TRFV_CL_POS_FLOW>-CALCPOS_GUID = 1.
<TRFV_CL_POS_FLOW>-CLASSPOS_GUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRFV_CL_POS_FLOW-COMPANY_CODE, sy-vline,
  WA_TRFV_CL_POS_FLOW-CLASS_ID, sy-vline,
  WA_TRFV_CL_POS_FLOW-POSITION_ACCOUNT, sy-vline,
  WA_TRFV_CL_POS_FLOW-LOT, sy-vline,
  WA_TRFV_CL_POS_FLOW-FLAG_LONG_SHORT, sy-vline,
  WA_TRFV_CL_POS_FLOW-TRD_TRANSACTION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRFV_CL_POS_FLOW 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_TRFV_CL_POS_FLOW 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_TRFV_CL_POS_FLOW INTO WA_TRFV_CL_POS_FLOW.


*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 CLASS_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TRFV_CL_POS_FLOW-CLASS_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRFV_CL_POS_FLOW-CLASS_ID.
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_TRFV_CL_POS_FLOW_STR, 
MANDT TYPE STRING,
FLOW_GUID TYPE STRING,
SUBTRANS_GUID TYPE STRING,
CALCPOS_GUID TYPE STRING,
CLASSPOS_GUID TYPE STRING,
COMPANY_CODE TYPE STRING,
CLASS_ID TYPE STRING,
POSITION_ACCOUNT TYPE STRING,
LOT TYPE STRING,
FLAG_LONG_SHORT TYPE STRING,
TRD_TRANSACTION TYPE STRING,
TRD_FLOWNR TYPE STRING,
DIS_FLOWTYPE TYPE STRING,
QUANT_CAT TYPE STRING,
AMOUNT_CAT TYPE STRING,
FLOW_CAT TYPE STRING,
UNITS TYPE STRING,
POSITION_CURR TYPE STRING,
POSITION_AMT TYPE STRING,
POSITION_DATE TYPE STRING,
LOCAL_AMT TYPE STRING,
LOCAL_CURR TYPE STRING,
BUSTRANSCAT TYPE STRING,
STATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRFV_CL_POS_FLOW_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_TRFV_CL_POS_FLOW_STR-MANDT sy-vline 
WA_TRFV_CL_POS_FLOW_STR-FLOW_GUID sy-vline 
WA_TRFV_CL_POS_FLOW_STR-SUBTRANS_GUID sy-vline 
WA_TRFV_CL_POS_FLOW_STR-CALCPOS_GUID sy-vline 
WA_TRFV_CL_POS_FLOW_STR-CLASSPOS_GUID sy-vline 
WA_TRFV_CL_POS_FLOW_STR-COMPANY_CODE sy-vline 
WA_TRFV_CL_POS_FLOW_STR-CLASS_ID sy-vline 
WA_TRFV_CL_POS_FLOW_STR-POSITION_ACCOUNT sy-vline 
WA_TRFV_CL_POS_FLOW_STR-LOT sy-vline 
WA_TRFV_CL_POS_FLOW_STR-FLAG_LONG_SHORT sy-vline 
WA_TRFV_CL_POS_FLOW_STR-TRD_TRANSACTION sy-vline 
WA_TRFV_CL_POS_FLOW_STR-TRD_FLOWNR sy-vline 
WA_TRFV_CL_POS_FLOW_STR-DIS_FLOWTYPE sy-vline 
WA_TRFV_CL_POS_FLOW_STR-QUANT_CAT sy-vline 
WA_TRFV_CL_POS_FLOW_STR-AMOUNT_CAT sy-vline 
WA_TRFV_CL_POS_FLOW_STR-FLOW_CAT sy-vline 
WA_TRFV_CL_POS_FLOW_STR-UNITS sy-vline 
WA_TRFV_CL_POS_FLOW_STR-POSITION_CURR sy-vline 
WA_TRFV_CL_POS_FLOW_STR-POSITION_AMT sy-vline 
WA_TRFV_CL_POS_FLOW_STR-POSITION_DATE sy-vline 
WA_TRFV_CL_POS_FLOW_STR-LOCAL_AMT sy-vline 
WA_TRFV_CL_POS_FLOW_STR-LOCAL_CURR sy-vline 
WA_TRFV_CL_POS_FLOW_STR-BUSTRANSCAT sy-vline 
WA_TRFV_CL_POS_FLOW_STR-STATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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