Creating CTXCAT Index

The following example combines the previous examples and creates the index set preference with the two sub-indexes:

begin
ctx_ddl.create_index_set('auction_iset');
ctx_ddl.add_index('auction_iset','price'); /* sub-index A */
ctx_ddl.add_index('auction_iset','price, bid_close'); /* sub-index B */
end;

Figure 3-3 shows how the sub-indexes A and B are created from the auction table. Each sub-index is a b-tree index on the text column and the named structured columns. For example, sub-index A is an index on the title column and the bid_close column.

You create the combined catalog index with CREATE INDEX as follows:

CREATE INDEX auction_titlex ON AUCTION(title) 
  INDEXTYPE IS CTXSYS.CTXCAT 
  PARAMETERS ('index set auction_iset')
;