ABAP Select data from SAP table T445L into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T445L 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 T445L. 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 T445L 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_T445L TYPE STANDARD TABLE OF T445L,
      WA_T445L TYPE T445L,
      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: <T445L> TYPE T445L.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T445L.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T445L
  INTO TABLE IT_T445L.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T445L
*  INTO TABLE @DATA(IT_T445L2).
*--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_T445L INDEX 1 INTO DATA(WA_T445L2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T445L ASSIGNING <T445L>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T445L>-SCTYP = 1.
<T445L>-LINE = 1.
<T445L>-BLOKZ = 1.
<T445L>-LINET = 1.
<T445L>-TABHK = 1.

ENDLOOP.

LOOP AT IT_T445L INTO WA_T445L.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T445L-FELDH, sy-vline,
  WA_T445L-LINKZ, sy-vline,
  WA_T445L-INFUN, sy-vline,
  WA_T445L-OUFUN, sy-vline,
  WA_T445L-VGFUN, sy-vline,
  WA_T445L-FLGEV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T445L 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_T445L 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_T445L INTO WA_T445L.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_T445L_STR, 
SCTYP TYPE STRING,
LINE TYPE STRING,
BLOKZ TYPE STRING,
LINET TYPE STRING,
TABHK TYPE STRING,
FELDH TYPE STRING,
LINKZ TYPE STRING,
INFUN TYPE STRING,
OUFUN TYPE STRING,
VGFUN TYPE STRING,
FLGEV TYPE STRING,
FLGIS TYPE STRING,
FLGFC TYPE STRING,
FLGVI TYPE STRING,
FLGDS TYPE STRING,
FLGDZ TYPE STRING,
LMAKR TYPE STRING,
IMAKR TYPE STRING,
RETYP TYPE STRING,
RELEN TYPE STRING,
LDESC TYPE STRING,
LINTX TYPE STRING,
MTVFP TYPE STRING,
PRREG TYPE STRING,
FCSTSTFNA TYPE STRING,
FCSTVRSIO TYPE STRING,
PLANSTFNA TYPE STRING,
PLANVRSIO TYPE STRING,
ELINE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T445L_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_T445L_STR-SCTYP sy-vline 
WA_T445L_STR-LINE sy-vline 
WA_T445L_STR-BLOKZ sy-vline 
WA_T445L_STR-LINET sy-vline 
WA_T445L_STR-TABHK sy-vline 
WA_T445L_STR-FELDH sy-vline 
WA_T445L_STR-LINKZ sy-vline 
WA_T445L_STR-INFUN sy-vline 
WA_T445L_STR-OUFUN sy-vline 
WA_T445L_STR-VGFUN sy-vline 
WA_T445L_STR-FLGEV sy-vline 
WA_T445L_STR-FLGIS sy-vline 
WA_T445L_STR-FLGFC sy-vline 
WA_T445L_STR-FLGVI sy-vline 
WA_T445L_STR-FLGDS sy-vline 
WA_T445L_STR-FLGDZ sy-vline 
WA_T445L_STR-LMAKR sy-vline 
WA_T445L_STR-IMAKR sy-vline 
WA_T445L_STR-RETYP sy-vline 
WA_T445L_STR-RELEN sy-vline 
WA_T445L_STR-LDESC sy-vline 
WA_T445L_STR-LINTX sy-vline 
WA_T445L_STR-MTVFP sy-vline 
WA_T445L_STR-PRREG sy-vline 
WA_T445L_STR-FCSTSTFNA sy-vline 
WA_T445L_STR-FCSTVRSIO sy-vline 
WA_T445L_STR-PLANSTFNA sy-vline 
WA_T445L_STR-PLANVRSIO sy-vline 
WA_T445L_STR-ELINE sy-vline      INTO ld_text SEPARATED BY SPACE.

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