ABAP Select data from SAP table P01T_TRANS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P01T_TRANS 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 P01T_TRANS. 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 P01T_TRANS 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_P01T_TRANS TYPE STANDARD TABLE OF P01T_TRANS,
      WA_P01T_TRANS TYPE P01T_TRANS,
      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: <P01T_TRANS> TYPE P01T_TRANS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P01T_TRANS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P01T_TRANS
  INTO TABLE IT_P01T_TRANS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P01T_TRANS
*  INTO TABLE @DATA(IT_P01T_TRANS2).
*--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_P01T_TRANS INDEX 1 INTO DATA(WA_P01T_TRANS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P01T_TRANS ASSIGNING <P01T_TRANS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P01T_TRANS>-MANDT = 1.
<P01T_TRANS>-MOLGA = 1.
<P01T_TRANS>-NDTIC = 1.
<P01T_TRANS>-STATUS = 1.
<P01T_TRANS>-TFTIC = 1.

ENDLOOP.

LOOP AT IT_P01T_TRANS INTO WA_P01T_TRANS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P01T_TRANS-GDATE, sy-vline,
  WA_P01T_TRANS-GTIME, sy-vline,
  WA_P01T_TRANS-UNAME, sy-vline,
  WA_P01T_TRANS-GLBID, sy-vline,
  WA_P01T_TRANS-TESTD, sy-vline,
  WA_P01T_TRANS-DOCTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P01T_TRANS 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_P01T_TRANS 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_P01T_TRANS INTO WA_P01T_TRANS.


*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_P01T_TRANS_STR, 
MANDT TYPE STRING,
MOLGA TYPE STRING,
NDTIC TYPE STRING,
STATUS TYPE STRING,
TFTIC TYPE STRING,
GDATE TYPE STRING,
GTIME TYPE STRING,
UNAME TYPE STRING,
GLBID TYPE STRING,
TESTD TYPE STRING,
DOCTY TYPE STRING,
RFCDEST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P01T_TRANS_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_P01T_TRANS_STR-MANDT sy-vline 
WA_P01T_TRANS_STR-MOLGA sy-vline 
WA_P01T_TRANS_STR-NDTIC sy-vline 
WA_P01T_TRANS_STR-STATUS sy-vline 
WA_P01T_TRANS_STR-TFTIC sy-vline 
WA_P01T_TRANS_STR-GDATE sy-vline 
WA_P01T_TRANS_STR-GTIME sy-vline 
WA_P01T_TRANS_STR-UNAME sy-vline 
WA_P01T_TRANS_STR-GLBID sy-vline 
WA_P01T_TRANS_STR-TESTD sy-vline 
WA_P01T_TRANS_STR-DOCTY sy-vline 
WA_P01T_TRANS_STR-RFCDEST sy-vline      INTO ld_text SEPARATED BY SPACE.

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