ABAP Select data from SAP table T445A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T445A 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 T445A. 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 T445A 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_T445A TYPE STANDARD TABLE OF T445A,
      WA_T445A TYPE T445A,
      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: <T445A> TYPE T445A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T445A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T445A
  INTO TABLE IT_T445A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T445A
*  INTO TABLE @DATA(IT_T445A2).
*--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_T445A INDEX 1 INTO DATA(WA_T445A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T445A ASSIGNING <T445A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T445A>-GSTRU = 1.
<T445A>-CVRSI = 1.
<T445A>-SPERI = 1.
<T445A>-PERIV = 1.
<T445A>-FABKL = 1.

ENDLOOP.

LOOP AT IT_T445A INTO WA_T445A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T445A-PRAST, sy-vline,
  WA_T445A-FLGPL, sy-vline,
  WA_T445A-FLG01, sy-vline,
  WA_T445A-FLG02, sy-vline,
  WA_T445A-KAFLG, sy-vline,
  WA_T445A-KURST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T445A 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_T445A 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_T445A INTO WA_T445A.


*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 CUNIT, internal->external for field BASME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_T445A-BASME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T445A-BASME.
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_T445A_STR, 
GSTRU TYPE STRING,
CVRSI TYPE STRING,
SPERI TYPE STRING,
PERIV TYPE STRING,
FABKL TYPE STRING,
PRAST TYPE STRING,
FLGPL TYPE STRING,
FLG01 TYPE STRING,
FLG02 TYPE STRING,
KAFLG TYPE STRING,
KURST TYPE STRING,
FLG08 TYPE STRING,
FLG09 TYPE STRING,
FLG03 TYPE STRING,
FLG04 TYPE STRING,
FLG05 TYPE STRING,
FLG06 TYPE STRING,
FLG07 TYPE STRING,
STWAE TYPE STRING,
BASME TYPE STRING,
WERKS TYPE STRING,
STFNA TYPE STRING,
KPBED TYPE STRING,
ALEFLG TYPE STRING,
FLG_JOIN TYPE STRING,
FLG_UPD TYPE STRING,
FLG_KZMRP TYPE STRING,
SYNC_VRSIO TYPE STRING,
VERSB TYPE STRING,
FLGPA TYPE STRING,
DEST_GRP TYPE STRING,
ANZPC TYPE STRING,
VERVS TYPE STRING,
PBED_EXIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T445A_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_T445A_STR-GSTRU sy-vline 
WA_T445A_STR-CVRSI sy-vline 
WA_T445A_STR-SPERI sy-vline 
WA_T445A_STR-PERIV sy-vline 
WA_T445A_STR-FABKL sy-vline 
WA_T445A_STR-PRAST sy-vline 
WA_T445A_STR-FLGPL sy-vline 
WA_T445A_STR-FLG01 sy-vline 
WA_T445A_STR-FLG02 sy-vline 
WA_T445A_STR-KAFLG sy-vline 
WA_T445A_STR-KURST sy-vline 
WA_T445A_STR-FLG08 sy-vline 
WA_T445A_STR-FLG09 sy-vline 
WA_T445A_STR-FLG03 sy-vline 
WA_T445A_STR-FLG04 sy-vline 
WA_T445A_STR-FLG05 sy-vline 
WA_T445A_STR-FLG06 sy-vline 
WA_T445A_STR-FLG07 sy-vline 
WA_T445A_STR-STWAE sy-vline 
WA_T445A_STR-BASME sy-vline 
WA_T445A_STR-WERKS sy-vline 
WA_T445A_STR-STFNA sy-vline 
WA_T445A_STR-KPBED sy-vline 
WA_T445A_STR-ALEFLG sy-vline 
WA_T445A_STR-FLG_JOIN sy-vline 
WA_T445A_STR-FLG_UPD sy-vline 
WA_T445A_STR-FLG_KZMRP sy-vline 
WA_T445A_STR-SYNC_VRSIO sy-vline 
WA_T445A_STR-VERSB sy-vline 
WA_T445A_STR-FLGPA sy-vline 
WA_T445A_STR-DEST_GRP sy-vline 
WA_T445A_STR-ANZPC sy-vline 
WA_T445A_STR-VERVS sy-vline 
WA_T445A_STR-PBED_EXIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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