I am unable to query cassandra mview from prestodb.
It gives below error.
presto> select * from mykeyspace1.mymview1 where phone in ('1234567890');
Query 20170213_131643_00074_5smf2 failed: line 1:15: Table cassandra.mykeyspace1.mymview1 does not exist
I have DSE 5.0.4 installed.
As of version 0.166, Presto does not support Cassandra materialized views. Please file an issue in the Presto repo: https://github.com/prestodb/presto/issues. If you want to take a shot at fixing it, we can give you pointers in the issue.
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I am new to cassandra. Whech i check that sasi is very useful to query espesially in where cluase. But i got an error showing
ConfigurationException: Unable to find custom indexer class 'org.apache.cassandra.index.sasi.SASIIndex'
My cassandra verion is 3.0.9
Does any body can help?
You shouldn't be running Cassandra version lower than 3.4 for Sasi index to work.
Check the answer here: https://stackoverflow.com/a/43467081/3582996
I'm trying to expose my spark-sql tables over JDBC via thriftserver but even though it looks like i've successfully connected, its not working. Here's what I've tried so far.
database setup:
in pyspark I loaded a parquet file, created a temp view as tableX
performed a .saveAsTable as hive_tableX
then I queried that table: spark.sql("SELECT * FROM hive_tableX LIMIT 1").show() which returned some data
at this point, my code is saving table information to the hivestore, right?
querying from spark-sql:
I then ran spark-sql and the spark sql shell started up
USE default
show tables; --> i see my table in there, hive_tableX
SELECT * FROM hive_tableX LIMIT 1 and I see some successful results.
thus, I believe it is now verified that my table has saved in the hive metastore, right?
then I turn on thriftserver
./sbin/start-thriftserver.sh
next, I turn on beeline so I can test the thriftserver connection
!connect jdbc:hive2://localhost:10000 (and enter username and password)
then I select the default db: use default;
and show tables; --> there's nothing there.
So, where are my tables? is beeline or thrift pointing to a different warehouse or something?
Edit: I think my thriftserver isn't using the right warehouse directory, so I'm trying to start it with a config option:
[still nothing] sbin/start-thriftserver.sh --hiveconf spark.sql.warehouse.dir=/code/spark/thrift/spark-warehouse
[still nothing] sbin/start-thriftserver.sh --conf spark.sql.warehouse.dir=/code/spark/thrift/spark-warehouse
Edit: starting it in the same physical directory as where the wherehouse was created seems to do the trick. Although, I don't know how to programmatically set the path to something else and start it elsewhere.
the solution to this particular problem was that I was starting thrift from a different directory than the spark-wherehouse and metastore_db were located.
Once I started it from the correct directory, it worked as expected and my tables were now available.
I'm trying to connect to a Datastax Community Edition server 2.1.2 via JDBC but I keep getting the following error no matter what I try to do, even when issuing a very basic command like select * from system_traces.events;
InvalidRequestException(why:Keyspace 'keyspace1' does not exist)
Issuing that same command via cqlsh works properly, so it seems to be a JDBC issue.
InvalidRequestException(why:Keyspace 'keyspace1' does not exist)
at org.apache.cassandra.cql.jdbc.CassandraConnection.<init>(CassandraConnection.java:229):229
at org.apache.cassandra.cql.jdbc.CassandraDriver.connect(CassandraDriver.java:92):92
at java.sql.DriverManager.getConnection(DriverManager.java:664):664
at java.sql.DriverManager.getConnection(DriverManager.java:270):270
at railo.commons.db.DBUtil.getConnection(DBUtil.java:109):109
at railo.runtime.db.DatasourceConnectionPool.loadDatasourceConnection(DatasourceConnectionPool.java:89):89
at railo.runtime.db.DatasourceConnectionPool.getDatasourceConnection(DatasourceConnectionPool.java:81):81
at railo.runtime.db.DatasourceManagerImpl.getConnection(DatasourceManagerImpl.java:65):65
at railo.runtime.tag.Query.executeDatasoure(Query.java:696):696 ...
Any ideas? TIA!
InvalidRequestException(why:Keyspace 'keyspace1' does not exist)
This exception means you are trying to query for a keyspace (in this case "Keyspace1") that hasn't yet been added to Cassandra. Try creating the keyspace before querying it.
You're probably doing a select (SELECT * FROM "Keyspace1"."Standard1") that you're not seeing or passing initialisation parameters to JDBC telling it to connect to Keyspace1. Verify that your code isn't looking for the non-existent keyspace by searching through the queries you have, specifically looking for Keyspace1 (or "Keyspace1" since in this case the keyspace name is case-sensitive).
On a side-note, "Keyspace1"."Standard1" tend to be the standard ks.cf pair used for cassandra examples so it would be good to scan your code for them to make sure that they are created before they are queried.
I am trying to create a table using cqlsh with composite primary key but it doesn't return to the cqlsh prompt. The cqlsh and cassandra versions are cqlsh 3.1.7 | Cassandra 1.2.13.2. Can we not create composite primary key using cqlsh? Have tried Dbeaver but that also fails reporting mismatched input ',' expecting EOF. Are there any other clients that allow to create?
Any suggestions would be helpful.
I tried your CREATE TABLE command on the same version of Cassandra using cql 3 and it just worked. It failed using cql 2.
If you're still using cql 2, that's likely the source of your problem.
I have a counter column family in cassandra. When i try to view the data from CQL i get an error even though there is data in the column family.
SELECT * from userstats;
Generates the following error:
'int' object has no attribute 'replace'
I can confirm that the data is in the column family and is working properly since I can view the data with the Datastax Opscenter data explorer.
It sounds like you're using an older version of cqlsh. Upgrading it (just copying the bin/cqlsh file from the Cassandra 1.1 branch head, along with everything under the pylib directory, into place) ought to solve this.
If it doesn't, running cqlsh with --debug would help a lot in diagnosing the problem.