I have a table structure like
create table file(id text primary key, fname text, mimetype text, isdir boolean, location text);
create index file_location on file (location);
and following is the content in the table:
insert into file (id, fname, mimetype, isdir, location) values('1', 'f1', 'pdf', False, 'c:/test/');
insert into file (id, fname, mimetype, isdir, location) values('2', 'f2', 'pdf', False, 'c:/test/');
insert into file (id, fname, mimetype, isdir, location) values('3', 'f3', 'pdf', False, 'c:/test/');
insert into file (id, fname, mimetype, isdir, location) values('4', 'f4', 'pdf', False, 'c:/test/a/');
I want to list out all the ids matching the following criteria:
select id from file where location like '%/test/%';
I know that like is not supported in CQL, can anyone please suggest the approach should I take for these kind of wildcard search queries. Please suggest.
DataStax Enterprise adds full text search to Cassandra: http://www.datastax.com/docs/datastax_enterprise3.1/solutions/search_index
As of Cassandra 3.4, this is possible with SASI indexes. This should work:
CREATE CUSTOM INDEX string_search_idx ON file(location)
USING 'org.apache.cassandra.index.sasi.SASIIndex'
WITH OPTIONS = {
'mode': 'CONTAINS',
'analyzer_class': 'org.apache.cassandra.index.sasi.analyzer.StandardAnalyzer',
'tokenization_enable_stemming': 'true',
'tokenization_locale': 'en',
'tokenization_skip_stop_words': 'true',
'analyzed': 'true',
'tokenization_normalize_lowercase': 'true'
};
This shall search for all "%abc%" queries on the column "file". More information here.
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