ABAP Select data from SAP table T445B into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T445B 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 T445B. 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 T445B 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_T445B TYPE STANDARD TABLE OF T445B,
      WA_T445B TYPE T445B,
      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: <T445B> TYPE T445B.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T445B.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T445B
  INTO TABLE IT_T445B.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T445B
*  INTO TABLE @DATA(IT_T445B2).
*--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_T445B INDEX 1 INTO DATA(WA_T445B2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T445B ASSIGNING <T445B>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T445B>-MANDT = 1.
<T445B>-UNAME = 1.
<T445B>-SCTYP = 1.
<T445B>-DYNP_PROG = 1.
<T445B>-ODYNP1 = 1.

ENDLOOP.

LOOP AT IT_T445B INTO WA_T445B.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T445B-ODYNP2, sy-vline,
  WA_T445B-ODYNP3, sy-vline,
  WA_T445B-ODYNP4, sy-vline,
  WA_T445B-ODYNP5, sy-vline,
  WA_T445B-ODYNP6, sy-vline,
  WA_T445B-ODYNP7, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T445B 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_T445B 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_T445B INTO WA_T445B.


*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_T445B_STR, 
MANDT TYPE STRING,
UNAME TYPE STRING,
SCTYP TYPE STRING,
DYNP_PROG TYPE STRING,
ODYNP1 TYPE STRING,
ODYNP2 TYPE STRING,
ODYNP3 TYPE STRING,
ODYNP4 TYPE STRING,
ODYNP5 TYPE STRING,
ODYNP6 TYPE STRING,
ODYNP7 TYPE STRING,
ODYNP8 TYPE STRING,
MDYNP1 TYPE STRING,
MDYNP2 TYPE STRING,
MDYNP3 TYPE STRING,
MDYNP4 TYPE STRING,
MDYNP5 TYPE STRING,
MDYNP6 TYPE STRING,
MDYNP7 TYPE STRING,
MDYNP8 TYPE STRING,
S TYPE STRING,
H_NOT_B TYPE STRING,
OWNMEM TYPE STRING,
KNOTEN TYPE STRING,
KENNZ TYPE STRING,
FNAME TYPE STRING,
KAPA_FLG TYPE STRING,
COL0 TYPE STRING,
SUMMN TYPE STRING,
SUMMT TYPE STRING,
FIXCOL TYPE STRING,
UNITDISP TYPE STRING,
CHARDISP TYPE STRING,
COLSDISP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T445B_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_T445B_STR-MANDT sy-vline 
WA_T445B_STR-UNAME sy-vline 
WA_T445B_STR-SCTYP sy-vline 
WA_T445B_STR-DYNP_PROG sy-vline 
WA_T445B_STR-ODYNP1 sy-vline 
WA_T445B_STR-ODYNP2 sy-vline 
WA_T445B_STR-ODYNP3 sy-vline 
WA_T445B_STR-ODYNP4 sy-vline 
WA_T445B_STR-ODYNP5 sy-vline 
WA_T445B_STR-ODYNP6 sy-vline 
WA_T445B_STR-ODYNP7 sy-vline 
WA_T445B_STR-ODYNP8 sy-vline 
WA_T445B_STR-MDYNP1 sy-vline 
WA_T445B_STR-MDYNP2 sy-vline 
WA_T445B_STR-MDYNP3 sy-vline 
WA_T445B_STR-MDYNP4 sy-vline 
WA_T445B_STR-MDYNP5 sy-vline 
WA_T445B_STR-MDYNP6 sy-vline 
WA_T445B_STR-MDYNP7 sy-vline 
WA_T445B_STR-MDYNP8 sy-vline 
WA_T445B_STR-S sy-vline 
WA_T445B_STR-H_NOT_B sy-vline 
WA_T445B_STR-OWNMEM sy-vline 
WA_T445B_STR-KNOTEN sy-vline 
WA_T445B_STR-KENNZ sy-vline 
WA_T445B_STR-FNAME sy-vline 
WA_T445B_STR-KAPA_FLG sy-vline 
WA_T445B_STR-COL0 sy-vline 
WA_T445B_STR-SUMMN sy-vline 
WA_T445B_STR-SUMMT sy-vline 
WA_T445B_STR-FIXCOL sy-vline 
WA_T445B_STR-UNITDISP sy-vline 
WA_T445B_STR-CHARDISP sy-vline 
WA_T445B_STR-COLSDISP sy-vline      INTO ld_text SEPARATED BY SPACE.

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