ABAP Select data from SAP table /BDL/SESSMAP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /BDL/SESSMAP 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 /BDL/SESSMAP. 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 /BDL/SESSMAP 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_/BDL/SESSMAP TYPE STANDARD TABLE OF /BDL/SESSMAP,
      WA_/BDL/SESSMAP TYPE /BDL/SESSMAP,
      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: </BDL/SESSMAP> TYPE /BDL/SESSMAP.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /BDL/SESSMAP
  INTO TABLE IT_/BDL/SESSMAP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /BDL/SESSMAP
*  INTO TABLE @DATA(IT_/BDL/SESSMAP2).
*--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_/BDL/SESSMAP INDEX 1 INTO DATA(WA_/BDL/SESSMAP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/BDL/SESSMAP ASSIGNING </BDL/SESSMAP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</BDL/SESSMAP>-REQ_INSTALL_NO = 1.
</BDL/SESSMAP>-REQ_SID = 1.
</BDL/SESSMAP>-REQ_SYSTEM_TYPE = 1.
</BDL/SESSMAP>-REQ_SESSNO = 1.
</BDL/SESSMAP>-REQ_CLIENT = 1.

ENDLOOP.

LOOP AT IT_/BDL/SESSMAP INTO WA_/BDL/SESSMAP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/BDL/SESSMAP-REQ_CONTRACT, sy-vline,
  WA_/BDL/SESSMAP-REQ_DESCR, sy-vline,
  WA_/BDL/SESSMAP-REQ_DEST, sy-vline,
  WA_/BDL/SESSMAP-REQ_PLAN_DATE, sy-vline,
  WA_/BDL/SESSMAP-TASK_ID, sy-vline,
  WA_/BDL/SESSMAP-REF_SESSNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/BDL/SESSMAP 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_/BDL/SESSMAP 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_/BDL/SESSMAP INTO WA_/BDL/SESSMAP.


*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_/BDL/SESSMAP_STR, 
REQ_INSTALL_NO TYPE STRING,
REQ_SID TYPE STRING,
REQ_SYSTEM_TYPE TYPE STRING,
REQ_SESSNO TYPE STRING,
REQ_CLIENT TYPE STRING,
REQ_CONTRACT TYPE STRING,
REQ_DESCR TYPE STRING,
REQ_DEST TYPE STRING,
REQ_PLAN_DATE TYPE STRING,
TASK_ID TYPE STRING,
REF_SESSNO TYPE STRING,
REF_CLIENT TYPE STRING,
REF_INSTALL_NO TYPE STRING,
REF_SID TYPE STRING,
REF_CONTRACT TYPE STRING,
REF_DESCR TYPE STRING,
COLLECTED TYPE STRING,
COLL_STAMP TYPE STRING,
COLL_DATE TYPE STRING,
SENT TYPE STRING,
ADDON TYPE STRING,
PERIOD TYPE STRING,
PERVALUE TYPE STRING,
DELAY_UNIT TYPE STRING,
DELAY_VALUE TYPE STRING,
RETRY TYPE STRING,
FORCE TYPE STRING,
UNAME TYPE STRING,
CREATED TYPE STRING,
CHANGED TYPE STRING,
NAMESPACE TYPE STRING,
INCREASING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/BDL/SESSMAP_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_/BDL/SESSMAP_STR-REQ_INSTALL_NO sy-vline 
WA_/BDL/SESSMAP_STR-REQ_SID sy-vline 
WA_/BDL/SESSMAP_STR-REQ_SYSTEM_TYPE sy-vline 
WA_/BDL/SESSMAP_STR-REQ_SESSNO sy-vline 
WA_/BDL/SESSMAP_STR-REQ_CLIENT sy-vline 
WA_/BDL/SESSMAP_STR-REQ_CONTRACT sy-vline 
WA_/BDL/SESSMAP_STR-REQ_DESCR sy-vline 
WA_/BDL/SESSMAP_STR-REQ_DEST sy-vline 
WA_/BDL/SESSMAP_STR-REQ_PLAN_DATE sy-vline 
WA_/BDL/SESSMAP_STR-TASK_ID sy-vline 
WA_/BDL/SESSMAP_STR-REF_SESSNO sy-vline 
WA_/BDL/SESSMAP_STR-REF_CLIENT sy-vline 
WA_/BDL/SESSMAP_STR-REF_INSTALL_NO sy-vline 
WA_/BDL/SESSMAP_STR-REF_SID sy-vline 
WA_/BDL/SESSMAP_STR-REF_CONTRACT sy-vline 
WA_/BDL/SESSMAP_STR-REF_DESCR sy-vline 
WA_/BDL/SESSMAP_STR-COLLECTED sy-vline 
WA_/BDL/SESSMAP_STR-COLL_STAMP sy-vline 
WA_/BDL/SESSMAP_STR-COLL_DATE sy-vline 
WA_/BDL/SESSMAP_STR-SENT sy-vline 
WA_/BDL/SESSMAP_STR-ADDON sy-vline 
WA_/BDL/SESSMAP_STR-PERIOD sy-vline 
WA_/BDL/SESSMAP_STR-PERVALUE sy-vline 
WA_/BDL/SESSMAP_STR-DELAY_UNIT sy-vline 
WA_/BDL/SESSMAP_STR-DELAY_VALUE sy-vline 
WA_/BDL/SESSMAP_STR-RETRY sy-vline 
WA_/BDL/SESSMAP_STR-FORCE sy-vline 
WA_/BDL/SESSMAP_STR-UNAME sy-vline 
WA_/BDL/SESSMAP_STR-CREATED sy-vline 
WA_/BDL/SESSMAP_STR-CHANGED sy-vline 
WA_/BDL/SESSMAP_STR-NAMESPACE sy-vline 
WA_/BDL/SESSMAP_STR-INCREASING sy-vline      INTO ld_text SEPARATED BY SPACE.

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