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.
Related
Currently when I start up cqlsh, I get:
ubuntu#ip-172-31-83-106:~$ cqlsh
Connected to Test Cluster at 127.0.0.1:9042.
[cqlsh 5.0.1 | Cassandra 3.11.4 | CQL spec 3.4.4 | Native protocol v4]
Use HELP for help.
cqlsh>
I want to be able to change
cqlsh>
not something unique, like
ubuntu#ip-172-31-83-106>
and each time I run a query, the prompt will remain. How can I do that?
CQLSH has very limited support for customization of the prompt. The only custom thing that you can bring into prompt is the string that should be passed via CQLSH_PROMPT environment variable and that will be printed before cqlsh> string (see sources)
For example, if you start your CQLSH as
CQLSH_PROMPT="$(whoami)#$(hostname)" cqlsh
then you'll gets something like this:
ubuntu#ip-172-31-83-106
cqlsh>
but that's all what you can do.
I need to get a dump(with data) from remote Cassandra database. I was able to get database schema via following command.How can i get all data in the keyspace?
I'm using Cassandra 1.1.9
echo -e "connect localhost/9260;\r\n use PWC_Keyspace;\r\n show schema;\n" | bin/cassandra-cli -h localhost -port 9260 > dilshan.cdl
With Cassandra 1.1.9, I don't believe you have access to cqlsh with the copy-to command, so you'll be stuck with 2 options.
1) Export the data from the data files (sstables) on disk using sstable2json, or
2) Write a program to iterate over every row and copy/serialize it to a format you find easier to work with.
You MAY be able to use a more recent cqlsh (say, from 2.0, which still used thrift instead of the native interface), and point it at your 1.1.9 server and use 'COPY TO' to export each table to a csv. However, the COPY command in cqlsh for 2.0 doesn't use paging, and cassandra 1.1.19 doesn't support paging, so there's a very good chance it's simply going to time out and fail.
I have installed datastax ODBC driver for cassndra and also i have created keyspace and some tables using cql 3. But ODBC driver is not showing up those tables.
Also in odbc documentation i read that the driver does not currently support version 3.0 of the Cassandra Query Language (CQL3) and the driver will not recognize keyspaces and column families that are defined with CQL 3.
So in order to use cql 2 i am using following command which is suggested in driver documentation:
...\cqlsh” -2
But this is giving an error saying "cqlsh: error: no such option: -2"
Can anybody help me out with this?
cql2 is deprecated and was removed from cslqh in Cassandra 2.0. It will be removed from the server as well in 3.0.
I do not know when cql3 support will be added to the ODBC driver.
The documentation is not correct regarding how to start cqlsh using a previous spec/version...you need to use --cqlversion instead of -2 (see notes below). However, as mentioned in jbellis' answer cql2 support has been removed from later versions of cassandra.
CQL Shell for Apache Cassandra
Options:
--version show program's version number and exit
-h, --help show this help message and exit
-C, --color Always use color output
--no-color Never use color output
-u USERNAME, --username=USERNAME
Authenticate as user.
-p PASSWORD, --password=PASSWORD
Authenticate using password.
-k KEYSPACE, --keyspace=KEYSPACE
Authenticate to the given keyspace.
-f FILE, --file=FILE Execute commands from FILE, then exit
-t TRANSPORT_FACTORY, --transport-factory=TRANSPORT_FACTORY
Use the provided Thrift transport factory function.
--debug Show additional debugging information
--cqlversion=CQLVERSION
Specify a particular CQL version (default: 3.1.1).
Examples: "3.0.3", "3.1.0"
-e EXECUTE, --execute=EXECUTE
Execute the statement and quit.
Environment:
Cassandra and CLI version is 1.2.12
OS Windows7 Enterprise, 64 Bit.
ran cassendra-cli.bat, When running the create table command I get following:
[default#unknown] create table us(name varchar); Syntax error at
position 7: no viable alternative at input 'table'
Any idea why its throwing error ?
You are using the older CLI client. This is pre-CQL and uses the Thrit API. If you want to use that client then check out the older docs. The general view is that CQL is the way to go though.
To use CQL use the CQLSH client instead.
One thing to note, even in CQL your statement is not valid. You must specify a primary key.
create table us(name varchar, primary key (name));
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.