ABAP Select data from SAP table TNDRG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TNDRG
*  INTO TABLE @DATA(IT_TNDRG2).
*--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_TNDRG INDEX 1 INTO DATA(WA_TNDRG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TNDRG>-MANDT = 1.
<TNDRG>-EINRI = 1.
<TNDRG>-ENDDT = 1.
<TNDRG>-BEGDT = 1.
<TNDRG>-COL01 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TNDRG-COL02, sy-vline,
  WA_TNDRG-COL03, sy-vline,
  WA_TNDRG-COL04, sy-vline,
  WA_TNDRG-COL05, sy-vline,
  WA_TNDRG-COL06, sy-vline,
  WA_TNDRG-KATID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TNDRG 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_TNDRG 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_TNDRG INTO WA_TNDRG.


*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_TNDRG-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNDRG-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COL01
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TNDRG-COL01
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNDRG-COL01.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COL02
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TNDRG-COL02
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNDRG-COL02.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COL03
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TNDRG-COL03
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNDRG-COL03.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COL04
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TNDRG-COL04
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNDRG-COL04.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COL05
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TNDRG-COL05
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNDRG-COL05.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COL06
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TNDRG-COL06
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNDRG-COL06.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KATID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TNDRG-KATID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNDRG-KATID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ZOTYP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TNDRG-ZOTYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNDRG-ZOTYP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COL00
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TNDRG-COL00
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNDRG-COL00.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COL_CW
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TNDRG-COL_CW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNDRG-COL_CW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ACC_TARIF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TNDRG-ACC_TARIF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNDRG-ACC_TARIF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ACC_TALST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TNDRG-ACC_TALST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNDRG-ACC_TALST.
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_TNDRG_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
ENDDT TYPE STRING,
BEGDT TYPE STRING,
COL01 TYPE STRING,
COL02 TYPE STRING,
COL03 TYPE STRING,
COL04 TYPE STRING,
COL05 TYPE STRING,
COL06 TYPE STRING,
KATID TYPE STRING,
BASER TYPE STRING,
WAERS TYPE STRING,
ZOTYP TYPE STRING,
COL00 TYPE STRING,
COL_CW TYPE STRING,
ACC_TARIF TYPE STRING,
ACC_TALST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TNDRG_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_TNDRG_STR-MANDT sy-vline 
WA_TNDRG_STR-EINRI sy-vline 
WA_TNDRG_STR-ENDDT sy-vline 
WA_TNDRG_STR-BEGDT sy-vline 
WA_TNDRG_STR-COL01 sy-vline 
WA_TNDRG_STR-COL02 sy-vline 
WA_TNDRG_STR-COL03 sy-vline 
WA_TNDRG_STR-COL04 sy-vline 
WA_TNDRG_STR-COL05 sy-vline 
WA_TNDRG_STR-COL06 sy-vline 
WA_TNDRG_STR-KATID sy-vline 
WA_TNDRG_STR-BASER sy-vline 
WA_TNDRG_STR-WAERS sy-vline 
WA_TNDRG_STR-ZOTYP sy-vline 
WA_TNDRG_STR-COL00 sy-vline 
WA_TNDRG_STR-COL_CW sy-vline 
WA_TNDRG_STR-ACC_TARIF sy-vline 
WA_TNDRG_STR-ACC_TALST sy-vline      INTO ld_text SEPARATED BY SPACE.

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