ABAP Select data from SAP table T853K into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T853K 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 T853K. 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 T853K 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_T853K TYPE STANDARD TABLE OF T853K,
      WA_T853K TYPE T853K,
      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: <T853K> TYPE T853K.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T853K.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T853K
  INTO TABLE IT_T853K.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T853K
*  INTO TABLE @DATA(IT_T853K2).
*--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_T853K INDEX 1 INTO DATA(WA_T853K2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T853K ASSIGNING <T853K>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T853K>-MANDT = 1.
<T853K>-RLDNR = 1.
<T853K>-RVERS = 1.
<T853K>-RSUBD = 1.
<T853K>-RYEAR = 1.

ENDLOOP.

LOOP AT IT_T853K INTO WA_T853K.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T853K-PERID, sy-vline,
  WA_T853K-INRIN, sy-vline,
  WA_T853K-INRDT, sy-vline,
  WA_T853K-INRUS, sy-vline,
  WA_T853K-DATUG, sy-vline,
  WA_T853K-DATVR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T853K 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_T853K 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_T853K INTO WA_T853K.


*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 RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T853K-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T853K-RLDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RVERS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T853K-RVERS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T853K-RVERS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_T853K-RYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T853K-RYEAR.
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_T853K_STR, 
MANDT TYPE STRING,
RLDNR TYPE STRING,
RVERS TYPE STRING,
RSUBD TYPE STRING,
RYEAR TYPE STRING,
PERID TYPE STRING,
INRIN TYPE STRING,
INRDT TYPE STRING,
INRUS TYPE STRING,
DATUG TYPE STRING,
DATVR TYPE STRING,
DATZE TYPE STRING,
DATKK TYPE STRING,
CLOIN TYPE STRING,
CLODT TYPE STRING,
CLOUS TYPE STRING,
PLDAT TYPE STRING,
PLERR TYPE STRING,
PLTIM TYPE STRING,
CLTIM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T853K_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_T853K_STR-MANDT sy-vline 
WA_T853K_STR-RLDNR sy-vline 
WA_T853K_STR-RVERS sy-vline 
WA_T853K_STR-RSUBD sy-vline 
WA_T853K_STR-RYEAR sy-vline 
WA_T853K_STR-PERID sy-vline 
WA_T853K_STR-INRIN sy-vline 
WA_T853K_STR-INRDT sy-vline 
WA_T853K_STR-INRUS sy-vline 
WA_T853K_STR-DATUG sy-vline 
WA_T853K_STR-DATVR sy-vline 
WA_T853K_STR-DATZE sy-vline 
WA_T853K_STR-DATKK sy-vline 
WA_T853K_STR-CLOIN sy-vline 
WA_T853K_STR-CLODT sy-vline 
WA_T853K_STR-CLOUS sy-vline 
WA_T853K_STR-PLDAT sy-vline 
WA_T853K_STR-PLERR sy-vline 
WA_T853K_STR-PLTIM sy-vline 
WA_T853K_STR-CLTIM sy-vline      INTO ld_text SEPARATED BY SPACE.

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