Datastore Examples

The following sections give examples for setting direct, multi-column, URL, and file datastores.

Specifying DIRECT_DATASTORE

The following example creates a table with a CLOB column to store text data. It then populates two rows with text data and indexes the table using the system-defined preference CTXSYS.DEFAULT_DATASTORE which uses the DIRECT_DATASTORE preference type.

create table mytable(id number primary key, docs clob); 

insert into mytable values(111555,'this text will be indexed');
insert into mytable values(111556,'this is a default datastore example');
commit;

create index myindex on mytable(docs) 
  indextype is ctxsys.context 
  parameters ('DATASTORE CTXSYS.DEFAULT_DATASTORE');

Specifying MULTI_COLUMN_DATASTORE

The following example creates a multi-column datastore preference called my_multi on the three text columns to be concatenated and indexed:

begin
ctx_ddl.create_preference('my_multi', 'MULTI_COLUMN_DATASTORE');
ctx_ddl.set_attribute('my_multi', 'columns', 'column1, column2, column3');
end;

Specifying URL Data Storage

This example creates a URL_DATASTORE preference called my_url to which the http_proxy, no_proxy, and timeout attributes are set. The timeout attribute is set to 300 seconds. The defaults are used for the attributes that are not set.

begin
 ctx_ddl.create_preference('my_url','URL_DATASTORE');
 ctx_ddl.set_attribute('my_url','HTTP_PROXY','www-proxy.us.example.com');
 ctx_ddl.set_attribute('my_url','NO_PROXY','us.example.com');
 ctx_ddl.set_attribute('my_url','Timeout','300');
end;

Specifying File Data Storage

The following example creates a data storage preference using the FILE_DATASTORE. This tells the system that the files to be indexed are stored in the operating system. The example uses CTX_DDL.SET_ATTRIBUTE to set the PATH attribute of to the directory /docs.

begin
ctx_ddl.create_preference('mypref', 'FILE_DATASTORE');
ctx_ddl.set_attribute('mypref', 'PATH', '/docs'); 
end;