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Maxim Podkolzine commented on CASSANDRA-12573: ---------------------------------------------- [~doanduyhai] Since CQL doesn't allow multiple LIKE constraints in one query, it does look like a bug. Can you suggest a workaround to search for several patterns? > SASI index. Incorrect results for '%foo%bar%'-like search pattern. > ------------------------------------------------------------------- > > Key: CASSANDRA-12573 > URL: https://issues.apache.org/jira/browse/CASSANDRA-12573 > Project: Cassandra > Issue Type: Bug > Reporter: Mikhail Krupitskiy > Priority: Critical > Labels: sasi > > We use Cassandra 3.7 and have faced a strange behaviour of SELECT requests > with "LIKE '%foo%bar%'" constraints on a column with SASI index. > Below are few experiments that show this behaviour. > Experiment 1: > {noformat} > drop keyspace if exists kmv; > create keyspace if not exists kmv WITH REPLICATION = { 'class' : > 'SimpleStrategy', 'replication_factor':'1'} ; > use kmv; > CREATE TABLE if not exists kmv (id int primary key, c1 text, c2 text); > CREATE CUSTOM INDEX ON kmv.kmv ( c2 ) USING > 'org.apache.cassandra.index.sasi.SASIIndex' WITH OPTIONS = { > 'mode': 'CONTAINS' > }; > insert into kmv (id, c1, c2) values (1, 'f21', 'qwe') ; > insert into kmv (id, c1, c2) values (2, 'f22', 'qweasd') ; > insert into kmv (id, c1, c2) values (3, 'f23', 'qwea1') ; > insert into kmv (id, c1, c2) values (4, 'f24', '1qwe') ; > insert into kmv (id, c1, c2) values (5, 'f25', 'asdqwe') ; > select c2 from kmv.kmv where c2 like '%w%a%'; > {noformat} > Expected result: qweasd, qwea1. > Actual result: no rows. > Experiment 2 (NOTE: definition of index is changed): > {noformat} > drop keyspace if exists kmv; > create keyspace if not exists kmv WITH REPLICATION = { 'class' : > 'SimpleStrategy', 'replication_factor':'1'} ; > use kmv; > CREATE TABLE if not exists kmv (id int primary key, c1 text, c2 text); > CREATE CUSTOM INDEX ON kmv.kmv ( c2 ) USING > 'org.apache.cassandra.index.sasi.SASIIndex' WITH OPTIONS = { > 'mode': 'CONTAINS', > 'analyzer_class': > 'org.apache.cassandra.index.sasi.analyzer.StandardAnalyzer', > 'analyzed': 'true' > }; > insert into kmv (id, c1, c2) values (1, 'f21', 'qwe') ; > insert into kmv (id, c1, c2) values (2, 'f22', 'qweasd') ; > insert into kmv (id, c1, c2) values (3, 'f23', 'qwea1') ; > insert into kmv (id, c1, c2) values (4, 'f24', '1qwe') ; > insert into kmv (id, c1, c2) values (5, 'f25', 'asdqwe') ; > select c2 from kmv.kmv where c2 like '%w%a%'; > {noformat} > Expected result: qweasd, qwea1. > Actual result: asdqwe, qweasd, qwea1. > Experiment 3 (NOTE: primary key is compound now and inserted data was > changed): > {noformat} > drop keyspace if exists kmv; > create keyspace if not exists kmv WITH REPLICATION = { 'class' : > 'SimpleStrategy', 'replication_factor':'1'} ; > use kmv; > CREATE TABLE if not exists kmv (id int, c1 text, c2 text, PRIMARY KEY(id, > c1)); > CREATE CUSTOM INDEX ON kmv.kmv ( c2 ) USING > 'org.apache.cassandra.index.sasi.SASIIndex' WITH OPTIONS = { > 'mode': 'CONTAINS', > 'analyzer_class': > 'org.apache.cassandra.index.sasi.analyzer.StandardAnalyzer', > 'analyzed': 'true' > }; > insert into kmv (id, c1, c2) values (1, 'f21', 'qwe') ; > insert into kmv (id, c1, c2) values (1, 'f22', 'qweasd') ; > insert into kmv (id, c1, c2) values (1, 'f23', 'qwea1') ; > insert into kmv (id, c1, c2) values (1, 'f24', '1qwe') ; > insert into kmv (id, c1, c2) values (1, 'f25', 'asdqwe') ; > select c2 from kmv.kmv where c2 like '%w%a%'; > {noformat} > Expected result: qweasd, qwea1. > Actual result: qwe, qweasd, qwea1, 1qwe, asdqwe. > Experiment 4 (NOTE: search criteria is changed): > {noformat} > drop keyspace if exists kmv; > create keyspace if not exists kmv WITH REPLICATION = { 'class' : > 'SimpleStrategy', 'replication_factor':'1'} ; > use kmv; > CREATE TABLE if not exists kmv (id int, c1 text, c2 text, PRIMARY KEY(id, > c1)); > CREATE CUSTOM INDEX ON kmv.kmv ( c2 ) USING > 'org.apache.cassandra.index.sasi.SASIIndex' WITH OPTIONS = { > 'mode': 'CONTAINS', > 'analyzer_class': > 'org.apache.cassandra.index.sasi.analyzer.StandardAnalyzer', > 'analyzed': 'true' > }; > insert into kmv (id, c1, c2) values (1, 'f21', 'qwe') ; > insert into kmv (id, c1, c2) values (1, 'f22', 'qweasd') ; > insert into kmv (id, c1, c2) values (1, 'f23', 'qwea1') ; > insert into kmv (id, c1, c2) values (1, 'f24', '1qwe') ; > insert into kmv (id, c1, c2) values (1, 'f25', 'asdqwe') ; > select c2 from kmv.kmv where c2 like '%w22%a%'; > {noformat} > Expected result: no rows. > Actual result: qweasd, qwea1, asdqwe. -- This message was sent by Atlassian JIRA (v6.3.4#6332)