ABAP Select data from SAP table J_1BELBZT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_1BELBZT 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 J_1BELBZT. 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 J_1BELBZT 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_J_1BELBZT TYPE STANDARD TABLE OF J_1BELBZT,
      WA_J_1BELBZT TYPE J_1BELBZT,
      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: <J_1BELBZT> TYPE J_1BELBZT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_1BELBZT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_1BELBZT
  INTO TABLE IT_J_1BELBZT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_1BELBZT
*  INTO TABLE @DATA(IT_J_1BELBZT2).
*--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_J_1BELBZT INDEX 1 INTO DATA(WA_J_1BELBZT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_1BELBZT ASSIGNING <J_1BELBZT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_1BELBZT>-T01 = 1.
<J_1BELBZT>-T02 = 1.
<J_1BELBZT>-T03 = 1.
<J_1BELBZT>-T04 = 1.
<J_1BELBZT>-T05 = 1.

ENDLOOP.

LOOP AT IT_J_1BELBZT INTO WA_J_1BELBZT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_1BELBZT-T06, sy-vline,
  WA_J_1BELBZT-T07, sy-vline,
  WA_J_1BELBZT-T08, sy-vline,
  WA_J_1BELBZT-T09, sy-vline,
  WA_J_1BELBZT-T10, sy-vline,
  WA_J_1BELBZT-T11, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_1BELBZT 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_J_1BELBZT 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_J_1BELBZT INTO WA_J_1BELBZT.


*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_J_1BELBZT_STR, 
T01 TYPE STRING,
T02 TYPE STRING,
T03 TYPE STRING,
T04 TYPE STRING,
T05 TYPE STRING,
T06 TYPE STRING,
T07 TYPE STRING,
T08 TYPE STRING,
T09 TYPE STRING,
T10 TYPE STRING,
T11 TYPE STRING,
T12 TYPE STRING,
T13 TYPE STRING,
T14 TYPE STRING,
T15 TYPE STRING,
T16 TYPE STRING,
T17 TYPE STRING,
T18 TYPE STRING,
T19 TYPE STRING,
T20 TYPE STRING,
T21 TYPE STRING,
T22 TYPE STRING,
T23 TYPE STRING,
T24 TYPE STRING,
T25 TYPE STRING,
T26 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_1BELBZT_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_J_1BELBZT_STR-T01 sy-vline 
WA_J_1BELBZT_STR-T02 sy-vline 
WA_J_1BELBZT_STR-T03 sy-vline 
WA_J_1BELBZT_STR-T04 sy-vline 
WA_J_1BELBZT_STR-T05 sy-vline 
WA_J_1BELBZT_STR-T06 sy-vline 
WA_J_1BELBZT_STR-T07 sy-vline 
WA_J_1BELBZT_STR-T08 sy-vline 
WA_J_1BELBZT_STR-T09 sy-vline 
WA_J_1BELBZT_STR-T10 sy-vline 
WA_J_1BELBZT_STR-T11 sy-vline 
WA_J_1BELBZT_STR-T12 sy-vline 
WA_J_1BELBZT_STR-T13 sy-vline 
WA_J_1BELBZT_STR-T14 sy-vline 
WA_J_1BELBZT_STR-T15 sy-vline 
WA_J_1BELBZT_STR-T16 sy-vline 
WA_J_1BELBZT_STR-T17 sy-vline 
WA_J_1BELBZT_STR-T18 sy-vline 
WA_J_1BELBZT_STR-T19 sy-vline 
WA_J_1BELBZT_STR-T20 sy-vline 
WA_J_1BELBZT_STR-T21 sy-vline 
WA_J_1BELBZT_STR-T22 sy-vline 
WA_J_1BELBZT_STR-T23 sy-vline 
WA_J_1BELBZT_STR-T24 sy-vline 
WA_J_1BELBZT_STR-T25 sy-vline 
WA_J_1BELBZT_STR-T26 sy-vline      INTO ld_text SEPARATED BY SPACE.

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