ABAP Select data from SAP table TN27 into internal table

Get Example source ABAP code based on a different SAP table
  

Below is a number of ABAP code snippets to demonstrate how to select data from SAP TN27 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 TN27. 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 TN27 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_TN27 TYPE STANDARD TABLE OF TN27,
      WA_TN27 TYPE TN27,
      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: <TN27> TYPE TN27.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TN27.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TN27
  INTO TABLE IT_TN27.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TN27
*  INTO TABLE @DATA(IT_TN272).
*--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_TN27 INDEX 1 INTO DATA(WA_TN272).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TN27 ASSIGNING <TN27>.
*To update a field value using a field symbol simply change the value via the field symbol pointer
<TN27>-MANDT = 1.
<TN27>-EINRI = 1.
<TN27>-BSCHLS = 1.
<TN27>-BSCHLH = 1.
<TN27>-BLART = 1.
ENDLOOP.

LOOP AT IT_TN27 INTO WA_TN27.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TN27-HKONT, sy-vline,
WA_TN27-BKTXT, sy-vline,
WA_TN27-SGTXT, sy-vline,
WA_TN27-HCOON, sy-vline,
WA_TN27-DELTA, sy-vline,
WA_TN27-CALCN, sy-vline.
ENDLOOP. *Add any further fields from structure WA_TN27 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_TN27 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_TN27 INTO WA_TN27. *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 EINRI CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT' EXPORTING input = WA_TN27-EINRI IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_TN27-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HKONT CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT' EXPORTING input = WA_TN27-HKONT IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_TN27-HKONT.
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_TN27_STR,
MANDT TYPE STRING,
EINRI TYPE STRING,
BSCHLS TYPE STRING,
BSCHLH TYPE STRING,
BLART TYPE STRING,
HKONT TYPE STRING,
BKTXT TYPE STRING,
SGTXT TYPE STRING,
HCOON TYPE STRING,
DELTA TYPE STRING,
CALCN TYPE STRING,
ACTIV TYPE STRING,
NOAUF TYPE STRING,END OF T_EKKO_STR. DATA: WA_TN27_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_TN27_STR-MANDT sy-vline
WA_TN27_STR-EINRI sy-vline
WA_TN27_STR-BSCHLS sy-vline
WA_TN27_STR-BSCHLH sy-vline
WA_TN27_STR-BLART sy-vline
WA_TN27_STR-HKONT sy-vline
WA_TN27_STR-BKTXT sy-vline
WA_TN27_STR-SGTXT sy-vline
WA_TN27_STR-HCOON sy-vline
WA_TN27_STR-DELTA sy-vline
WA_TN27_STR-CALCN sy-vline
WA_TN27_STR-ACTIV sy-vline
WA_TN27_STR-NOAUF sy-vline INTO ld_text SEPARATED BY SPACE. *Add any further fields from structure WA_EKKO_STR you want to CONCATENATE... ENDLOOP. ENDFORM.