ABAP Select data from SAP table DB2_CONVTOOL_ALV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB2_CONVTOOL_ALV 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 DB2_CONVTOOL_ALV. 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 DB2_CONVTOOL_ALV 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_DB2_CONVTOOL_ALV TYPE STANDARD TABLE OF DB2_CONVTOOL_ALV,
      WA_DB2_CONVTOOL_ALV TYPE DB2_CONVTOOL_ALV,
      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: <DB2_CONVTOOL_ALV> TYPE DB2_CONVTOOL_ALV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB2_CONVTOOL_ALV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB2_CONVTOOL_ALV
  INTO TABLE IT_DB2_CONVTOOL_ALV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB2_CONVTOOL_ALV
*  INTO TABLE @DATA(IT_DB2_CONVTOOL_ALV2).
*--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_DB2_CONVTOOL_ALV INDEX 1 INTO DATA(WA_DB2_CONVTOOL_ALV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB2_CONVTOOL_ALV ASSIGNING <DB2_CONVTOOL_ALV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB2_CONVTOOL_ALV>-EXCLUDED = 1.
<DB2_CONVTOOL_ALV>-QUALIFIER = 1.
<DB2_CONVTOOL_ALV>-OBJECTNAME = 1.
<DB2_CONVTOOL_ALV>-OBJECTTYPE = 1.
<DB2_CONVTOOL_ALV>-DBNAME = 1.

ENDLOOP.

LOOP AT IT_DB2_CONVTOOL_ALV INTO WA_DB2_CONVTOOL_ALV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB2_CONVTOOL_ALV-SPACENAME, sy-vline,
  WA_DB2_CONVTOOL_ALV-NON_CONVERTIBLE, sy-vline,
  WA_DB2_CONVTOOL_ALV-CONVERT_INLLOB, sy-vline,
  WA_DB2_CONVTOOL_ALV-CONVERT_FIXCHAR, sy-vline,
  WA_DB2_CONVTOOL_ALV-CONVERT_PGSIZE, sy-vline,
  WA_DB2_CONVTOOL_ALV-CONVERT_ROWFORMAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB2_CONVTOOL_ALV 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_DB2_CONVTOOL_ALV 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_DB2_CONVTOOL_ALV INTO WA_DB2_CONVTOOL_ALV.


*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_DB2_CONVTOOL_ALV_STR, 
EXCLUDED TYPE STRING,
QUALIFIER TYPE STRING,
OBJECTNAME TYPE STRING,
OBJECTTYPE TYPE STRING,
DBNAME TYPE STRING,
SPACENAME TYPE STRING,
NON_CONVERTIBLE TYPE STRING,
CONVERT_INLLOB TYPE STRING,
CONVERT_FIXCHAR TYPE STRING,
CONVERT_PGSIZE TYPE STRING,
CONVERT_ROWFORMAT TYPE STRING,
CONVERT_RBAFORMAT TYPE STRING,
CONVERT_SPACETYPE TYPE STRING,
CONVERT_ENCRYPTION TYPE STRING,
CONVERT_COMPRESSION TYPE STRING,
PGSIZE_CURRENT TYPE STRING,
PGSIZE_NEW TYPE STRING,
BPOOL_CURRENT TYPE STRING,
BPOOL_NEW TYPE STRING,
ROWFORMAT_CURRENT TYPE STRING,
ROWFORMAT_NEW TYPE STRING,
SPACETYPE_CURRENT TYPE STRING,
SPACETYPE_NEW TYPE STRING,
PARTITIONS TYPE STRING,
ENCRYPTED TYPE STRING,
TSTYPE TYPE STRING,
TSSPACE TYPE STRING,
OLDEST_REO_TS TYPE STRING,
TBNAME TYPE STRING,
TBTYPE TYPE STRING,
NTABLES TYPE STRING,
REASON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB2_CONVTOOL_ALV_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_DB2_CONVTOOL_ALV_STR-EXCLUDED sy-vline 
WA_DB2_CONVTOOL_ALV_STR-QUALIFIER sy-vline 
WA_DB2_CONVTOOL_ALV_STR-OBJECTNAME sy-vline 
WA_DB2_CONVTOOL_ALV_STR-OBJECTTYPE sy-vline 
WA_DB2_CONVTOOL_ALV_STR-DBNAME sy-vline 
WA_DB2_CONVTOOL_ALV_STR-SPACENAME sy-vline 
WA_DB2_CONVTOOL_ALV_STR-NON_CONVERTIBLE sy-vline 
WA_DB2_CONVTOOL_ALV_STR-CONVERT_INLLOB sy-vline 
WA_DB2_CONVTOOL_ALV_STR-CONVERT_FIXCHAR sy-vline 
WA_DB2_CONVTOOL_ALV_STR-CONVERT_PGSIZE sy-vline 
WA_DB2_CONVTOOL_ALV_STR-CONVERT_ROWFORMAT sy-vline 
WA_DB2_CONVTOOL_ALV_STR-CONVERT_RBAFORMAT sy-vline 
WA_DB2_CONVTOOL_ALV_STR-CONVERT_SPACETYPE sy-vline 
WA_DB2_CONVTOOL_ALV_STR-CONVERT_ENCRYPTION sy-vline 
WA_DB2_CONVTOOL_ALV_STR-CONVERT_COMPRESSION sy-vline 
WA_DB2_CONVTOOL_ALV_STR-PGSIZE_CURRENT sy-vline 
WA_DB2_CONVTOOL_ALV_STR-PGSIZE_NEW sy-vline 
WA_DB2_CONVTOOL_ALV_STR-BPOOL_CURRENT sy-vline 
WA_DB2_CONVTOOL_ALV_STR-BPOOL_NEW sy-vline 
WA_DB2_CONVTOOL_ALV_STR-ROWFORMAT_CURRENT sy-vline 
WA_DB2_CONVTOOL_ALV_STR-ROWFORMAT_NEW sy-vline 
WA_DB2_CONVTOOL_ALV_STR-SPACETYPE_CURRENT sy-vline 
WA_DB2_CONVTOOL_ALV_STR-SPACETYPE_NEW sy-vline 
WA_DB2_CONVTOOL_ALV_STR-PARTITIONS sy-vline 
WA_DB2_CONVTOOL_ALV_STR-ENCRYPTED sy-vline 
WA_DB2_CONVTOOL_ALV_STR-TSTYPE sy-vline 
WA_DB2_CONVTOOL_ALV_STR-TSSPACE sy-vline 
WA_DB2_CONVTOOL_ALV_STR-OLDEST_REO_TS sy-vline 
WA_DB2_CONVTOOL_ALV_STR-TBNAME sy-vline 
WA_DB2_CONVTOOL_ALV_STR-TBTYPE sy-vline 
WA_DB2_CONVTOOL_ALV_STR-NTABLES sy-vline 
WA_DB2_CONVTOOL_ALV_STR-REASON sy-vline      INTO ld_text SEPARATED BY SPACE.

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