ABAP Select data from SAP table T445M into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T445M 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 T445M. 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 T445M 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_T445M TYPE STANDARD TABLE OF T445M,
      WA_T445M TYPE T445M,
      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: <T445M> TYPE T445M.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T445M.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T445M
  INTO TABLE IT_T445M.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T445M
*  INTO TABLE @DATA(IT_T445M2).
*--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_T445M INDEX 1 INTO DATA(WA_T445M2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T445M ASSIGNING <T445M>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T445M>-SCTYP = 1.
<T445M>-MAKRO = 1.
<T445M>-CALFD = 1.
<T445M>-Z1 = 1.
<T445M>-O1 = 1.

ENDLOOP.

LOOP AT IT_T445M INTO WA_T445M.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T445M-OP, sy-vline,
  WA_T445M-Z2, sy-vline,
  WA_T445M-O2, sy-vline,
  WA_T445M-WERT, sy-vline,
  WA_T445M-Z3, sy-vline,
  WA_T445M-SUTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T445M 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_T445M 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_T445M INTO WA_T445M.


*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_T445M_STR, 
SCTYP TYPE STRING,
MAKRO TYPE STRING,
CALFD TYPE STRING,
Z1 TYPE STRING,
O1 TYPE STRING,
OP TYPE STRING,
Z2 TYPE STRING,
O2 TYPE STRING,
WERT TYPE STRING,
Z3 TYPE STRING,
SUTYP TYPE STRING,
SUMAK TYPE STRING,
GRPZE TYPE STRING,
GRPNO TYPE STRING,
ARKZ1 TYPE STRING,
ARKZ2 TYPE STRING,
ARKZ3 TYPE STRING,
RELE1 TYPE STRING,
VAFUN TYPE STRING,
EHBA1 TYPE STRING,
EHBA2 TYPE STRING,
EHBA3 TYPE STRING,
EHBA4 TYPE STRING,
RELE2 TYPE STRING,
RELE3 TYPE STRING,
DISKZ TYPE STRING,
MARKZ TYPE STRING,
OPTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T445M_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_T445M_STR-SCTYP sy-vline 
WA_T445M_STR-MAKRO sy-vline 
WA_T445M_STR-CALFD sy-vline 
WA_T445M_STR-Z1 sy-vline 
WA_T445M_STR-O1 sy-vline 
WA_T445M_STR-OP sy-vline 
WA_T445M_STR-Z2 sy-vline 
WA_T445M_STR-O2 sy-vline 
WA_T445M_STR-WERT sy-vline 
WA_T445M_STR-Z3 sy-vline 
WA_T445M_STR-SUTYP sy-vline 
WA_T445M_STR-SUMAK sy-vline 
WA_T445M_STR-GRPZE sy-vline 
WA_T445M_STR-GRPNO sy-vline 
WA_T445M_STR-ARKZ1 sy-vline 
WA_T445M_STR-ARKZ2 sy-vline 
WA_T445M_STR-ARKZ3 sy-vline 
WA_T445M_STR-RELE1 sy-vline 
WA_T445M_STR-VAFUN sy-vline 
WA_T445M_STR-EHBA1 sy-vline 
WA_T445M_STR-EHBA2 sy-vline 
WA_T445M_STR-EHBA3 sy-vline 
WA_T445M_STR-EHBA4 sy-vline 
WA_T445M_STR-RELE2 sy-vline 
WA_T445M_STR-RELE3 sy-vline 
WA_T445M_STR-DISKZ sy-vline 
WA_T445M_STR-MARKZ sy-vline 
WA_T445M_STR-OPTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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