cql

I'm attempting to insert a modified document back to Cassandra DB with a new key. I'm having hard time figuring out what is the issue the error message is pointing at. When looking for others that have had similar problems the answers seem to be related to the keys, and in my case the None is just a value of few of the keys. How do I solve this issue? keys = ','.join(current.keys()) params = [':' + x for x in current.keys()] values = ','.join(params) query = "INSERT INTO wiki.pages (%s) Values (%s)" % (keys, values) query = query.encode('utf-8') cursor.execute(query, current) Here's the data

Here is my cassandra table for chat kind of application: CREATE TABLE tax_keyspace_dev.chat_messages ( message text, when timestamp, from_id text, to_id text, read boolean, participants text, PRIMARY KEY(participants, when, to_id) ); This query work: select * from tax_keyspace_dev.chat_messages where participants='caone@one.com_shashank_shrivastava@acme.com' order by when; but following queries don't work: select * from tax_keyspace_dev.chat_messages where to_id='caone@one.com' order by when; Error is " Bad Request: PRIMARY KEY part to_id cannot be restricted (preceding part when is either not

I'm new to cassandra and hector so i'm trying to execute cql queries but the problem is that not all columns are of type string so how dow I execute the query "select * from users"? My column family looks like this: UPDATE COLUMN FAMILY users WITH comparator = UTF8Type AND key_validation_class=UTF8Type AND column_metadata = [ {column_name: full_name, validation_class: UTF8Type} {column_name: email, validation_class: UTF8Type} {column_name: state, validation_class: UTF8Type, index_type: KEYS} {column_name: gender, validation_class: UTF8Type} {column_name: birth_year, validation_class: LongType,

My understanding that rows are overwritten when another row with identical primary keys is inserted. For example: I have columns (user_id int, item_id int, site_id int) , and my PRIMARY KEY(user_id, item_id) If I had the following table: user_id, item_id, site_id 2 3 4 and I insert user_id : 2, item_id : 3, site_id : 10 , my new table would be: user_id, item_id, site_id 2 3 10 not user_id, item_id, site_id 2 3 4 2 3 10 Is this simple case hold in all cases? Are any subtleties that I likely not aware off? Also, I could not find this in the docs and came to this conclusion by playing around with

One main part of Cassandra that I don't fully understand is its range queries. I know that Cassandra emphasizes distributed environment and focuses on performance, but probably because of that, it currently only support several types of ranges queries that it can finish efficiently, and what I would like to know is that: which types of range queries are supported by Cassandra. As far as I know, Cassandra supports the following range queries: 1: Range Queries on Primary key with keyword TOKEN , for example: CREATE TABLE only_int (int_key int PRIMARY KEY); ... select * from only_int where token

Executing two identical requests but the DISTINCT keyword gives unexpected results. Without the keyword, the result is ok but with DISTINCT, it looks like the where clause is ignored. Why ? Cqlsh version: Connected to Test Cluster at localhost:9160. [cqlsh 4.1.1 | Cassandra 2.0.6 | CQL spec 3.1.1 | Thrift protocol 19.39.0] Table considered: DESCRIBE TABLE events; CREATE TABLE events ( userid uuid, "timestamp" timestamp, event_type text, data text, PRIMARY KEY (userid, "timestamp", event_type) ) WITH bloom_filter_fp_chance=0.010000 AND caching='KEYS_ONLY' AND comment='' AND dclocal_read_repair