ABAP Select data from SAP table U444B into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP U444B 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 U444B. 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 U444B 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_U444B TYPE STANDARD TABLE OF U444B,
      WA_U444B TYPE U444B,
      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: <U444B> TYPE U444B.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U444B.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U444B
  INTO TABLE IT_U444B.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U444B
*  INTO TABLE @DATA(IT_U444B2).
*--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_U444B INDEX 1 INTO DATA(WA_U444B2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U444B ASSIGNING <U444B>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U444B>-MANDT = 1.
<U444B>-TGROUP = 1.
<U444B>-UNAME = 1.
<U444B>-NAVNR = 1.
<U444B>-TCODE = 1.

ENDLOOP.

LOOP AT IT_U444B INTO WA_U444B.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U444B-TEXT, sy-vline,
  WA_U444B-ICON_ID, sy-vline,
  WA_U444B-ICON_TEXT, sy-vline,
  WA_U444B-QUICKINFO, sy-vline,
  WA_U444B-ICON_NAME, sy-vline,
  WA_U444B-ANFBD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U444B 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_U444B 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_U444B INTO WA_U444B.


*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_U444B_STR, 
MANDT TYPE STRING,
TGROUP TYPE STRING,
UNAME TYPE STRING,
NAVNR TYPE STRING,
TCODE TYPE STRING,
TEXT TYPE STRING,
ICON_ID TYPE STRING,
ICON_TEXT TYPE STRING,
QUICKINFO TYPE STRING,
ICON_NAME TYPE STRING,
ANFBD TYPE STRING,
PID01 TYPE STRING,
PIDV1 TYPE STRING,
PID02 TYPE STRING,
PIDV2 TYPE STRING,
PID03 TYPE STRING,
PIDV3 TYPE STRING,
BESKZ TYPE STRING,
MTART TYPE STRING,
DISGR TYPE STRING,
DISMM TYPE STRING,
TRANS TYPE STRING,
AEXTS TYPE STRING,
ANMOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U444B_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_U444B_STR-MANDT sy-vline 
WA_U444B_STR-TGROUP sy-vline 
WA_U444B_STR-UNAME sy-vline 
WA_U444B_STR-NAVNR sy-vline 
WA_U444B_STR-TCODE sy-vline 
WA_U444B_STR-TEXT sy-vline 
WA_U444B_STR-ICON_ID sy-vline 
WA_U444B_STR-ICON_TEXT sy-vline 
WA_U444B_STR-QUICKINFO sy-vline 
WA_U444B_STR-ICON_NAME sy-vline 
WA_U444B_STR-ANFBD sy-vline 
WA_U444B_STR-PID01 sy-vline 
WA_U444B_STR-PIDV1 sy-vline 
WA_U444B_STR-PID02 sy-vline 
WA_U444B_STR-PIDV2 sy-vline 
WA_U444B_STR-PID03 sy-vline 
WA_U444B_STR-PIDV3 sy-vline 
WA_U444B_STR-BESKZ sy-vline 
WA_U444B_STR-MTART sy-vline 
WA_U444B_STR-DISGR sy-vline 
WA_U444B_STR-DISMM sy-vline 
WA_U444B_STR-TRANS sy-vline 
WA_U444B_STR-AEXTS sy-vline 
WA_U444B_STR-ANMOD sy-vline      INTO ld_text SEPARATED BY SPACE.

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