ABAP Select data from SAP table DB6CATIX into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB6CATIX 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 DB6CATIX. 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 DB6CATIX 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_DB6CATIX TYPE STANDARD TABLE OF DB6CATIX,
      WA_DB6CATIX TYPE DB6CATIX,
      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: <DB6CATIX> TYPE DB6CATIX.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB6CATIX.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB6CATIX
  INTO TABLE IT_DB6CATIX.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB6CATIX
*  INTO TABLE @DATA(IT_DB6CATIX2).
*--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_DB6CATIX INDEX 1 INTO DATA(WA_DB6CATIX2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB6CATIX ASSIGNING <DB6CATIX>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB6CATIX>-INDSCHEMA = 1.
<DB6CATIX>-INDNAME = 1.
<DB6CATIX>-DEFINER = 1.
<DB6CATIX>-TABSCHEMA = 1.
<DB6CATIX>-TABNAME = 1.

ENDLOOP.

LOOP AT IT_DB6CATIX INTO WA_DB6CATIX.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB6CATIX-COLNAMES, sy-vline,
  WA_DB6CATIX-UNIQUERULE, sy-vline,
  WA_DB6CATIX-MADE_UNIQUE, sy-vline,
  WA_DB6CATIX-COLCOUNT, sy-vline,
  WA_DB6CATIX-UNIQUE_COLCOUNT, sy-vline,
  WA_DB6CATIX-INDEXTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB6CATIX 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_DB6CATIX 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_DB6CATIX INTO WA_DB6CATIX.


*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_DB6CATIX_STR, 
INDSCHEMA TYPE STRING,
INDNAME TYPE STRING,
DEFINER TYPE STRING,
TABSCHEMA TYPE STRING,
TABNAME TYPE STRING,
COLNAMES TYPE STRING,
UNIQUERULE TYPE STRING,
MADE_UNIQUE TYPE STRING,
COLCOUNT TYPE STRING,
UNIQUE_COLCOUNT TYPE STRING,
INDEXTYPE TYPE STRING,
ENTRYTYPE TYPE STRING,
PCTFREE TYPE STRING,
IID TYPE STRING,
NLEAF TYPE STRING,
NLEVELS TYPE STRING,
FIRSTKEYCARD TYPE STRING,
FIRST2KEYCARD TYPE STRING,
FIRST3KEYCARD TYPE STRING,
FIRST4KEYCARD TYPE STRING,
FULLKEYCARD TYPE STRING,
CLUSTERRATIO TYPE STRING,
CLUSTERFACTOR TYPE STRING,
SEQUENTIAL_PAGES TYPE STRING,
DENSITY TYPE STRING,
USER_DEFINED TYPE STRING,
SYSTEM_REQUIRED TYPE STRING,
CREATE_TIME TYPE STRING,
STATS_TIME TYPE STRING,
MINPCTUSED TYPE STRING,
REVERSE_SCANS TYPE STRING,
INTERNAL_FORMAT TYPE STRING,
REMARKS TYPE STRING,
INDEX_OBJECTID TYPE STRING,
NUMRIDS TYPE STRING,
NUMRIDS_DELETED TYPE STRING,
NUM_EMPTY_LEAFS TYPE STRING,
AVERAGE_RANDOM_FETCH_PAGES TYPE STRING,
AVERAGE_RANDOM_PAGES TYPE STRING,
AVERAGE_SEQUENCE_GAP TYPE STRING,
AVERAGE_SEQUENCE_FETCH_GAP TYPE STRING,
AVERAGE_SEQUENCE_PAGES TYPE STRING,
AVERAGE_SEQUENCE_FETCH_PAGES TYPE STRING,
TBSPACEID TYPE STRING,
PCTPAGESSAVED TYPE STRING,
COMPRESSION TYPE STRING,
INDCARD TYPE STRING,
AVGLEAFKEYSIZE TYPE STRING,
AVGNLEAFKEYSIZE TYPE STRING,
COLLECTSTATISTICS TYPE STRING,
LASTUSED TYPE STRING,
SNAPSHOT_TIMESTAMP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB6CATIX_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_DB6CATIX_STR-INDSCHEMA sy-vline 
WA_DB6CATIX_STR-INDNAME sy-vline 
WA_DB6CATIX_STR-DEFINER sy-vline 
WA_DB6CATIX_STR-TABSCHEMA sy-vline 
WA_DB6CATIX_STR-TABNAME sy-vline 
WA_DB6CATIX_STR-COLNAMES sy-vline 
WA_DB6CATIX_STR-UNIQUERULE sy-vline 
WA_DB6CATIX_STR-MADE_UNIQUE sy-vline 
WA_DB6CATIX_STR-COLCOUNT sy-vline 
WA_DB6CATIX_STR-UNIQUE_COLCOUNT sy-vline 
WA_DB6CATIX_STR-INDEXTYPE sy-vline 
WA_DB6CATIX_STR-ENTRYTYPE sy-vline 
WA_DB6CATIX_STR-PCTFREE sy-vline 
WA_DB6CATIX_STR-IID sy-vline 
WA_DB6CATIX_STR-NLEAF sy-vline 
WA_DB6CATIX_STR-NLEVELS sy-vline 
WA_DB6CATIX_STR-FIRSTKEYCARD sy-vline 
WA_DB6CATIX_STR-FIRST2KEYCARD sy-vline 
WA_DB6CATIX_STR-FIRST3KEYCARD sy-vline 
WA_DB6CATIX_STR-FIRST4KEYCARD sy-vline 
WA_DB6CATIX_STR-FULLKEYCARD sy-vline 
WA_DB6CATIX_STR-CLUSTERRATIO sy-vline 
WA_DB6CATIX_STR-CLUSTERFACTOR sy-vline 
WA_DB6CATIX_STR-SEQUENTIAL_PAGES sy-vline 
WA_DB6CATIX_STR-DENSITY sy-vline 
WA_DB6CATIX_STR-USER_DEFINED sy-vline 
WA_DB6CATIX_STR-SYSTEM_REQUIRED sy-vline 
WA_DB6CATIX_STR-CREATE_TIME sy-vline 
WA_DB6CATIX_STR-STATS_TIME sy-vline 
WA_DB6CATIX_STR-MINPCTUSED sy-vline 
WA_DB6CATIX_STR-REVERSE_SCANS sy-vline 
WA_DB6CATIX_STR-INTERNAL_FORMAT sy-vline 
WA_DB6CATIX_STR-REMARKS sy-vline 
WA_DB6CATIX_STR-INDEX_OBJECTID sy-vline 
WA_DB6CATIX_STR-NUMRIDS sy-vline 
WA_DB6CATIX_STR-NUMRIDS_DELETED sy-vline 
WA_DB6CATIX_STR-NUM_EMPTY_LEAFS sy-vline 
WA_DB6CATIX_STR-AVERAGE_RANDOM_FETCH_PAGES sy-vline 
WA_DB6CATIX_STR-AVERAGE_RANDOM_PAGES sy-vline 
WA_DB6CATIX_STR-AVERAGE_SEQUENCE_GAP sy-vline 
WA_DB6CATIX_STR-AVERAGE_SEQUENCE_FETCH_GAP sy-vline 
WA_DB6CATIX_STR-AVERAGE_SEQUENCE_PAGES sy-vline 
WA_DB6CATIX_STR-AVERAGE_SEQUENCE_FETCH_PAGES sy-vline 
WA_DB6CATIX_STR-TBSPACEID sy-vline 
WA_DB6CATIX_STR-PCTPAGESSAVED sy-vline 
WA_DB6CATIX_STR-COMPRESSION sy-vline 
WA_DB6CATIX_STR-INDCARD sy-vline 
WA_DB6CATIX_STR-AVGLEAFKEYSIZE sy-vline 
WA_DB6CATIX_STR-AVGNLEAFKEYSIZE sy-vline 
WA_DB6CATIX_STR-COLLECTSTATISTICS sy-vline 
WA_DB6CATIX_STR-LASTUSED sy-vline 
WA_DB6CATIX_STR-SNAPSHOT_TIMESTAMP sy-vline      INTO ld_text SEPARATED BY SPACE.

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