ABAP Select data from SAP table TN20K 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 TN20K 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 TN20K. 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 TN20K 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_TN20K TYPE STANDARD TABLE OF TN20K, WA_TN20K TYPE TN20K, 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: <TN20K> TYPE TN20K. *Process all fields in table header/work area as string values PERFORM process_as_string_field_values CHANGING wa_TN20K. SELECT * *restrict ABAP select to first 10 rows UP TO 10 ROWS FROM TN20K INTO TABLE IT_TN20K. *Select data and declare internal table using in-line method @DATA *SELECT * * FROM TN20K * INTO TABLE @DATA(IT_TN20K2). *--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_TN20K INDEX 1 INTO DATA(WA_TN20K2). *Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL LOOP AT IT_TN20K ASSIGNING <TN20K>.*To update a field value using a field symbol simply change the value via the field symbol pointer
<TN20K>-MANDT = 1.
<TN20K>-EINRI = 1.
<TN20K>-KATEGORIE = 1.
<TN20K>-TARIF = 1.
<TN20K>-LEIST = 1.
ENDLOOP. LOOP AT IT_TN20K INTO WA_TN20K. *Write horizonal line to screen report. WRITE:/ sy-uline. *Write selected data to screen/report before conversion. WRITE:/ sy-vline, WA_TN20K-BEGDT, sy-vline,
WA_TN20K-ENDDT, sy-vline,
WA_TN20K-ABRKZ, sy-vline,
WA_TN20K-HCOKZ, sy-vline,
WA_TN20K-EBM_SRVTY, sy-vline,
ENDLOOP. *Add any further fields from structure WA_TN20K 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_TN20K 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_TN20K INTO WA_TN20K. *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_TN20K-EINRI IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_TN20K-EINRI.
WRITE:/ 'New Value:', ld_input.
*Conversion exit ALPHA, internal->external for field TARIF CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT' EXPORTING input = WA_TN20K-TARIF IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_TN20K-TARIF.
WRITE:/ 'New Value:', ld_input.
*Conversion exit ALPHA, internal->external for field LEIST CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT' EXPORTING input = WA_TN20K-LEIST IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_TN20K-LEIST.
WRITE:/ 'New Value:', ld_input.
*Conversion exit ALPHA, internal->external for field EBM_SRVTY CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT' EXPORTING input = WA_TN20K-EBM_SRVTY IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_TN20K-EBM_SRVTY.
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_TN20K_STR,
MANDT TYPE STRING,
EINRI TYPE STRING,
KATEGORIE TYPE STRING,
TARIF TYPE STRING,
LEIST TYPE STRING,
BEGDT TYPE STRING,
ENDDT TYPE STRING,
ABRKZ TYPE STRING,
HCOKZ TYPE STRING,
EBM_SRVTY TYPE STRING,END OF T_EKKO_STR. DATA: WA_TN20K_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_TN20K_STR-MANDT sy-vline
WA_TN20K_STR-EINRI sy-vline
WA_TN20K_STR-KATEGORIE sy-vline
WA_TN20K_STR-TARIF sy-vline
WA_TN20K_STR-LEIST sy-vline
WA_TN20K_STR-BEGDT sy-vline
WA_TN20K_STR-ENDDT sy-vline
WA_TN20K_STR-ABRKZ sy-vline
WA_TN20K_STR-HCOKZ sy-vline
WA_TN20K_STR-EBM_SRVTY sy-vline INTO ld_text SEPARATED BY SPACE. *Add any further fields from structure WA_EKKO_STR you want to CONCATENATE... ENDLOOP. ENDFORM.