ABAP Select data from SAP table TF189 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TF189 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 TF189. 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 TF189 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_TF189 TYPE STANDARD TABLE OF TF189,
      WA_TF189 TYPE TF189,
      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: <TF189> TYPE TF189.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TF189.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TF189
  INTO TABLE IT_TF189.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TF189
*  INTO TABLE @DATA(IT_TF1892).
*--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_TF189 INDEX 1 INTO DATA(WA_TF1892).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TF189 ASSIGNING <TF189>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TF189>-MANDT = 1.
<TF189>-DIMEN = 1.
<TF189>-STRVS = 1.
<TF189>-CONGR = 1.
<TF189>-BUNIT = 1.

ENDLOOP.

LOOP AT IT_TF189 INTO WA_TF189.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TF189-RYEAR, sy-vline,
  WA_TF189-PERID, sy-vline,
  WA_TF189-TYEAR, sy-vline,
  WA_TF189-TPERI, sy-vline,
  WA_TF189-FYEAR, sy-vline,
  WA_TF189-FPERI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TF189 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_TF189 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_TF189 INTO WA_TF189.


*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 STRVS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TF189-STRVS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF189-STRVS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AFIMC, internal->external for field CONGR
CALL FUNCTION 'CONVERSION_EXIT_AFIMC_OUTPUT'
  EXPORTING
    input =                      WA_TF189-CONGR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF189-CONGR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AFIMC, internal->external for field BUNIT
CALL FUNCTION 'CONVERSION_EXIT_AFIMC_OUTPUT'
  EXPORTING
    input =                      WA_TF189-BUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF189-BUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit INVGJ, internal->external for field RYEAR
CALL FUNCTION 'CONVERSION_EXIT_INVGJ_OUTPUT'
  EXPORTING
    input =                      WA_TF189-RYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF189-RYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit INVPR, internal->external for field PERID
CALL FUNCTION 'CONVERSION_EXIT_INVPR_OUTPUT'
  EXPORTING
    input =                      WA_TF189-PERID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF189-PERID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field TYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TF189-TYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF189-TYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field FYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TF189-FYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF189-FYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field HFSYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TF189-HFSYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF189-HFSYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field DOPYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TF189-DOPYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF189-DOPYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field LYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TF189-LYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF189-LYEAR.
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_TF189_STR, 
MANDT TYPE STRING,
DIMEN TYPE STRING,
STRVS TYPE STRING,
CONGR TYPE STRING,
BUNIT TYPE STRING,
RYEAR TYPE STRING,
PERID TYPE STRING,
TYEAR TYPE STRING,
TPERI TYPE STRING,
FYEAR TYPE STRING,
FPERI TYPE STRING,
FEFLG TYPE STRING,
FORGCHFLG TYPE STRING,
FORGCH TYPE STRING,
HFSYEAR TYPE STRING,
HFSPERI TYPE STRING,
DOPYEAR TYPE STRING,
DOPPERI TYPE STRING,
LYEAR TYPE STRING,
LPERI TYPE STRING,
LBFLG TYPE STRING,
LORGCHFLG TYPE STRING,
LMERGERFLG TYPE STRING,
PCIND TYPE STRING,
CUIND TYPE STRING,
IEIND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TF189_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_TF189_STR-MANDT sy-vline 
WA_TF189_STR-DIMEN sy-vline 
WA_TF189_STR-STRVS sy-vline 
WA_TF189_STR-CONGR sy-vline 
WA_TF189_STR-BUNIT sy-vline 
WA_TF189_STR-RYEAR sy-vline 
WA_TF189_STR-PERID sy-vline 
WA_TF189_STR-TYEAR sy-vline 
WA_TF189_STR-TPERI sy-vline 
WA_TF189_STR-FYEAR sy-vline 
WA_TF189_STR-FPERI sy-vline 
WA_TF189_STR-FEFLG sy-vline 
WA_TF189_STR-FORGCHFLG sy-vline 
WA_TF189_STR-FORGCH sy-vline 
WA_TF189_STR-HFSYEAR sy-vline 
WA_TF189_STR-HFSPERI sy-vline 
WA_TF189_STR-DOPYEAR sy-vline 
WA_TF189_STR-DOPPERI sy-vline 
WA_TF189_STR-LYEAR sy-vline 
WA_TF189_STR-LPERI sy-vline 
WA_TF189_STR-LBFLG sy-vline 
WA_TF189_STR-LORGCHFLG sy-vline 
WA_TF189_STR-LMERGERFLG sy-vline 
WA_TF189_STR-PCIND sy-vline 
WA_TF189_STR-CUIND sy-vline 
WA_TF189_STR-IEIND sy-vline      INTO ld_text SEPARATED BY SPACE.

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