ABAP Select data from SAP table JBDOB01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP JBDOB01 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 JBDOB01. 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 JBDOB01 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_JBDOB01 TYPE STANDARD TABLE OF JBDOB01,
      WA_JBDOB01 TYPE JBDOB01,
      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: <JBDOB01> TYPE JBDOB01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_JBDOB01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM JBDOB01
  INTO TABLE IT_JBDOB01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM JBDOB01
*  INTO TABLE @DATA(IT_JBDOB012).
*--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_JBDOB01 INDEX 1 INTO DATA(WA_JBDOB012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_JBDOB01 ASSIGNING <JBDOB01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<JBDOB01>-ROBNUM = 1.
<JBDOB01>-BUKRS = 1.
<JBDOB01>-GSART = 1.
<JBDOB01>-SDATST = 1.
<JBDOB01>-SDATBE = 1.

ENDLOOP.

LOOP AT IT_JBDOB01 INTO WA_JBDOB01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_JBDOB01-SGSTAT, sy-vline,
  WA_JBDOB01-DMWBEG, sy-vline,
  WA_JBDOB01-DMWEND, sy-vline,
  WA_JBDOB01-SMWREL, sy-vline,
  WA_JBDOB01-SMWAKT, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_JBDOB01 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_JBDOB01 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_JBDOB01 INTO WA_JBDOB01.


*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_JBDOB01_STR, 
ROBNUM TYPE STRING,
BUKRS TYPE STRING,
GSART TYPE STRING,
SDATST TYPE STRING,
SDATBE TYPE STRING,
SGSTAT TYPE STRING,
DMWBEG TYPE STRING,
DMWEND TYPE STRING,
SMWREL TYPE STRING,
SMWAKT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_JBDOB01_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_JBDOB01_STR-ROBNUM sy-vline 
WA_JBDOB01_STR-BUKRS sy-vline 
WA_JBDOB01_STR-GSART sy-vline 
WA_JBDOB01_STR-SDATST sy-vline 
WA_JBDOB01_STR-SDATBE sy-vline 
WA_JBDOB01_STR-SGSTAT sy-vline 
WA_JBDOB01_STR-DMWBEG sy-vline 
WA_JBDOB01_STR-DMWEND sy-vline 
WA_JBDOB01_STR-SMWREL sy-vline 
WA_JBDOB01_STR-SMWAKT sy-vline      INTO ld_text SEPARATED BY SPACE.

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