ABAP Select data from SAP table T5W1Y into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T5W1Y 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 T5W1Y. 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 T5W1Y 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_T5W1Y TYPE STANDARD TABLE OF T5W1Y,
      WA_T5W1Y TYPE T5W1Y,
      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: <T5W1Y> TYPE T5W1Y.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T5W1Y.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T5W1Y
  INTO TABLE IT_T5W1Y.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T5W1Y
*  INTO TABLE @DATA(IT_T5W1Y2).
*--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_T5W1Y INDEX 1 INTO DATA(WA_T5W1Y2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T5W1Y ASSIGNING <T5W1Y>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T5W1Y>-MANDT = 1.
<T5W1Y>-KVSCH = 1.
<T5W1Y>-KVGES = 1.
<T5W1Y>-MINVA = 1.
<T5W1Y>-ENDDA = 1.

ENDLOOP.

LOOP AT IT_T5W1Y INTO WA_T5W1Y.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T5W1Y-BEGDA, sy-vline,
  WA_T5W1Y-MECON, sy-vline,
  WA_T5W1Y-ADCON, sy-vline,
  WA_T5W1Y-CHCON, sy-vline,
  WA_T5W1Y-THRES, sy-vline,
  WA_T5W1Y-CHMAX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T5W1Y 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_T5W1Y 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_T5W1Y INTO WA_T5W1Y.


*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_T5W1Y_STR, 
MANDT TYPE STRING,
KVSCH TYPE STRING,
KVGES TYPE STRING,
MINVA TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
MECON TYPE STRING,
ADCON TYPE STRING,
CHCON TYPE STRING,
THRES TYPE STRING,
CHMAX TYPE STRING,
RSCON TYPE STRING,
RMCON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T5W1Y_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_T5W1Y_STR-MANDT sy-vline 
WA_T5W1Y_STR-KVSCH sy-vline 
WA_T5W1Y_STR-KVGES sy-vline 
WA_T5W1Y_STR-MINVA sy-vline 
WA_T5W1Y_STR-ENDDA sy-vline 
WA_T5W1Y_STR-BEGDA sy-vline 
WA_T5W1Y_STR-MECON sy-vline 
WA_T5W1Y_STR-ADCON sy-vline 
WA_T5W1Y_STR-CHCON sy-vline 
WA_T5W1Y_STR-THRES sy-vline 
WA_T5W1Y_STR-CHMAX sy-vline 
WA_T5W1Y_STR-RSCON sy-vline 
WA_T5W1Y_STR-RMCON sy-vline      INTO ld_text SEPARATED BY SPACE.

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