ABAP Select data from SAP table TRFV_MAN_POST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TRFV_MAN_POST 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_MAN_POST. 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_MAN_POST 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_MAN_POST TYPE STANDARD TABLE OF TRFV_MAN_POST,
      WA_TRFV_MAN_POST TYPE TRFV_MAN_POST,
      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_MAN_POST> TYPE TRFV_MAN_POST.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRFV_MAN_POST
*  INTO TABLE @DATA(IT_TRFV_MAN_POST2).
*--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_MAN_POST INDEX 1 INTO DATA(WA_TRFV_MAN_POST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRFV_MAN_POST>-MANDT1 = 1.
<TRFV_MAN_POST>-MAN_POST_GUID = 1.
<TRFV_MAN_POST>-POSITION_DATE = 1.
<TRFV_MAN_POST>-PAYMENT_DATE = 1.
<TRFV_MAN_POST>-DUE_DATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRFV_MAN_POST-POSTING_DATE, sy-vline,
  WA_TRFV_MAN_POST-ALLOC_NMBR, sy-vline,
  WA_TRFV_MAN_POST-HOUSE_BANK, sy-vline,
  WA_TRFV_MAN_POST-HOUSE_BANK_ACC, sy-vline,
  WA_TRFV_MAN_POST-MANDT2, sy-vline,
  WA_TRFV_MAN_POST-CALC_POS_GUID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRFV_MAN_POST 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_MAN_POST 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_MAN_POST INTO WA_TRFV_MAN_POST.


*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_MAN_POST-CLASS_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRFV_MAN_POST-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_MAN_POST_STR, 
MANDT1 TYPE STRING,
MAN_POST_GUID TYPE STRING,
POSITION_DATE TYPE STRING,
PAYMENT_DATE TYPE STRING,
DUE_DATE TYPE STRING,
POSTING_DATE TYPE STRING,
ALLOC_NMBR TYPE STRING,
HOUSE_BANK TYPE STRING,
HOUSE_BANK_ACC TYPE STRING,
MANDT2 TYPE STRING,
CALC_POS_GUID TYPE STRING,
LOT TYPE STRING,
FLAG_LONG_SHORT TYPE STRING,
MANDT3 TYPE STRING,
CLASS_POS_GUID TYPE STRING,
CLASS_ID TYPE STRING,
POSITION_ACCOUNT TYPE STRING,
POSITION_CURR TYPE STRING,
POSITION_CAT TYPE STRING,
FLAG_MARGIN_REL TYPE STRING,
STOCK_EXCHANGE TYPE STRING,
RATE_TYPE TYPE STRING,
PRODUCT_CATEGORY TYPE STRING,
ACC_ASS_REF TYPE STRING,
MANDT4 TYPE STRING,
MAN_POST_GUID1 TYPE STRING,
FLOW_NUMBER TYPE STRING,
TRD_FLOW_NUMBER TYPE STRING,
DIS_FLOWTYPE TYPE STRING,
POSITION_AMT TYPE STRING,
LOCAL_CURR TYPE STRING,
LOCAL_AMT TYPE STRING,
PAYMENT_AMT TYPE STRING,
PAYMENT_CURR TYPE STRING,
BUSTRANSID TYPE STRING,
BUSTRANSCAT TYPE STRING,
COMPANY_CODE TYPE STRING,
STATUS TYPE STRING,
FIXING_USER TYPE STRING,
FIXING_DATE TYPE STRING,
FIXING_TIME TYPE STRING,
REVERSAL_REASON TYPE STRING,
REVERSAL_USER TYPE STRING,
REVERSAL_TIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRFV_MAN_POST_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_MAN_POST_STR-MANDT1 sy-vline 
WA_TRFV_MAN_POST_STR-MAN_POST_GUID sy-vline 
WA_TRFV_MAN_POST_STR-POSITION_DATE sy-vline 
WA_TRFV_MAN_POST_STR-PAYMENT_DATE sy-vline 
WA_TRFV_MAN_POST_STR-DUE_DATE sy-vline 
WA_TRFV_MAN_POST_STR-POSTING_DATE sy-vline 
WA_TRFV_MAN_POST_STR-ALLOC_NMBR sy-vline 
WA_TRFV_MAN_POST_STR-HOUSE_BANK sy-vline 
WA_TRFV_MAN_POST_STR-HOUSE_BANK_ACC sy-vline 
WA_TRFV_MAN_POST_STR-MANDT2 sy-vline 
WA_TRFV_MAN_POST_STR-CALC_POS_GUID sy-vline 
WA_TRFV_MAN_POST_STR-LOT sy-vline 
WA_TRFV_MAN_POST_STR-FLAG_LONG_SHORT sy-vline 
WA_TRFV_MAN_POST_STR-MANDT3 sy-vline 
WA_TRFV_MAN_POST_STR-CLASS_POS_GUID sy-vline 
WA_TRFV_MAN_POST_STR-CLASS_ID sy-vline 
WA_TRFV_MAN_POST_STR-POSITION_ACCOUNT sy-vline 
WA_TRFV_MAN_POST_STR-POSITION_CURR sy-vline 
WA_TRFV_MAN_POST_STR-POSITION_CAT sy-vline 
WA_TRFV_MAN_POST_STR-FLAG_MARGIN_REL sy-vline 
WA_TRFV_MAN_POST_STR-STOCK_EXCHANGE sy-vline 
WA_TRFV_MAN_POST_STR-RATE_TYPE sy-vline 
WA_TRFV_MAN_POST_STR-PRODUCT_CATEGORY sy-vline 
WA_TRFV_MAN_POST_STR-ACC_ASS_REF sy-vline 
WA_TRFV_MAN_POST_STR-MANDT4 sy-vline 
WA_TRFV_MAN_POST_STR-MAN_POST_GUID1 sy-vline 
WA_TRFV_MAN_POST_STR-FLOW_NUMBER sy-vline 
WA_TRFV_MAN_POST_STR-TRD_FLOW_NUMBER sy-vline 
WA_TRFV_MAN_POST_STR-DIS_FLOWTYPE sy-vline 
WA_TRFV_MAN_POST_STR-POSITION_AMT sy-vline 
WA_TRFV_MAN_POST_STR-LOCAL_CURR sy-vline 
WA_TRFV_MAN_POST_STR-LOCAL_AMT sy-vline 
WA_TRFV_MAN_POST_STR-PAYMENT_AMT sy-vline 
WA_TRFV_MAN_POST_STR-PAYMENT_CURR sy-vline 
WA_TRFV_MAN_POST_STR-BUSTRANSID sy-vline 
WA_TRFV_MAN_POST_STR-BUSTRANSCAT sy-vline 
WA_TRFV_MAN_POST_STR-COMPANY_CODE sy-vline 
WA_TRFV_MAN_POST_STR-STATUS sy-vline 
WA_TRFV_MAN_POST_STR-FIXING_USER sy-vline 
WA_TRFV_MAN_POST_STR-FIXING_DATE sy-vline 
WA_TRFV_MAN_POST_STR-FIXING_TIME sy-vline 
WA_TRFV_MAN_POST_STR-REVERSAL_REASON sy-vline 
WA_TRFV_MAN_POST_STR-REVERSAL_USER sy-vline 
WA_TRFV_MAN_POST_STR-REVERSAL_TIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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