ABAP Select data from SAP table DB02_LOBS_S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB02_LOBS_S 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 DB02_LOBS_S. 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 DB02_LOBS_S 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_DB02_LOBS_S TYPE STANDARD TABLE OF DB02_LOBS_S,
      WA_DB02_LOBS_S TYPE DB02_LOBS_S,
      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: <DB02_LOBS_S> TYPE DB02_LOBS_S.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB02_LOBS_S.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB02_LOBS_S
  INTO TABLE IT_DB02_LOBS_S.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB02_LOBS_S
*  INTO TABLE @DATA(IT_DB02_LOBS_S2).
*--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_DB02_LOBS_S INDEX 1 INTO DATA(WA_DB02_LOBS_S2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB02_LOBS_S ASSIGNING <DB02_LOBS_S>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB02_LOBS_S>-OWNER = 1.
<DB02_LOBS_S>-TABLE_NAME = 1.
<DB02_LOBS_S>-COLUMN_NAME = 1.
<DB02_LOBS_S>-SEGMENT_NAME = 1.
<DB02_LOBS_S>-TABLESPACE_NAME = 1.

ENDLOOP.

LOOP AT IT_DB02_LOBS_S INTO WA_DB02_LOBS_S.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB02_LOBS_S-INDEX_NAME, sy-vline,
  WA_DB02_LOBS_S-SIZE_MB, sy-vline,
  WA_DB02_LOBS_S-BLOCKS, sy-vline,
  WA_DB02_LOBS_S-CHUNK, sy-vline,
  WA_DB02_LOBS_S-PCTVERSION, sy-vline,
  WA_DB02_LOBS_S-RETENTION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB02_LOBS_S 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_DB02_LOBS_S 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_DB02_LOBS_S INTO WA_DB02_LOBS_S.


*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_DB02_LOBS_S_STR, 
OWNER TYPE STRING,
TABLE_NAME TYPE STRING,
COLUMN_NAME TYPE STRING,
SEGMENT_NAME TYPE STRING,
TABLESPACE_NAME TYPE STRING,
INDEX_NAME TYPE STRING,
SIZE_MB TYPE STRING,
BLOCKS TYPE STRING,
CHUNK TYPE STRING,
PCTVERSION TYPE STRING,
RETENTION TYPE STRING,
FREEPOOLS TYPE STRING,
CACHE TYPE STRING,
LOGGING TYPE STRING,
ENCRYPT TYPE STRING,
COMPRESSION TYPE STRING,
DEDUPLICATION TYPE STRING,
IN_ROW TYPE STRING,
FORMAT TYPE STRING,
PARTITIONED TYPE STRING,
SECUREFILE TYPE STRING,
SEGMENT_CREATED TYPE STRING,
RETENTION_TYPE TYPE STRING,
RETENTION_VALUE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB02_LOBS_S_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_DB02_LOBS_S_STR-OWNER sy-vline 
WA_DB02_LOBS_S_STR-TABLE_NAME sy-vline 
WA_DB02_LOBS_S_STR-COLUMN_NAME sy-vline 
WA_DB02_LOBS_S_STR-SEGMENT_NAME sy-vline 
WA_DB02_LOBS_S_STR-TABLESPACE_NAME sy-vline 
WA_DB02_LOBS_S_STR-INDEX_NAME sy-vline 
WA_DB02_LOBS_S_STR-SIZE_MB sy-vline 
WA_DB02_LOBS_S_STR-BLOCKS sy-vline 
WA_DB02_LOBS_S_STR-CHUNK sy-vline 
WA_DB02_LOBS_S_STR-PCTVERSION sy-vline 
WA_DB02_LOBS_S_STR-RETENTION sy-vline 
WA_DB02_LOBS_S_STR-FREEPOOLS sy-vline 
WA_DB02_LOBS_S_STR-CACHE sy-vline 
WA_DB02_LOBS_S_STR-LOGGING sy-vline 
WA_DB02_LOBS_S_STR-ENCRYPT sy-vline 
WA_DB02_LOBS_S_STR-COMPRESSION sy-vline 
WA_DB02_LOBS_S_STR-DEDUPLICATION sy-vline 
WA_DB02_LOBS_S_STR-IN_ROW sy-vline 
WA_DB02_LOBS_S_STR-FORMAT sy-vline 
WA_DB02_LOBS_S_STR-PARTITIONED sy-vline 
WA_DB02_LOBS_S_STR-SECUREFILE sy-vline 
WA_DB02_LOBS_S_STR-SEGMENT_CREATED sy-vline 
WA_DB02_LOBS_S_STR-RETENTION_TYPE sy-vline 
WA_DB02_LOBS_S_STR-RETENTION_VALUE sy-vline      INTO ld_text SEPARATED BY SPACE.

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