hector_开发者

How to use cql queries to get different datatypes out of cassandra with java client hector

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\"?[详细]

2023-04-12 14:01 分类：问答

SliceQuery in Hector API for cassandra DB throws HInvalidRequestException: InvalidRequestException(why:Key may not be empty)

I have username and password as the columns of a ColumnFamily keyed with userName. create column family TestUserInfo with comparator = UTF8Type with[详细]

2023-04-12 06:01 分类：问答

ThriftColumnFamilyTemplate for querying super column family and their columns

I have a cassandra data model that\'s super column family. There are multiple super columns and every super column has multiple columns of different type (for example quantity is integer, Id is long,[详细]

2023-04-11 03:28 分类：问答

Cassandra Client - examining columns as Strings

I am new to Cassandra & I am using the Hector Java Client for writing/reading from it. I\'ve the following code to insert values -[详细]

2023-04-08 17:30 分类：问答

Does Hector provide APIs to support composite key?

Right now, I have to manually generate the composite key by formatting the subkeys together. It\'s ugly and not efficient. I wonder if Hector provides such set of APIs to handle composite keys 开发者_[详细]

2023-04-05 01:58 分类：问答

Hector (Cassandra) Serialize Anomaly

Q. I am using hector (cassandra client) and storing UTF8 type values in columns, on the client side I am using hector\'s StringSerializer to serialize/ deserialize values. It works fine for normal str[详细]

2023-04-03 18:53 分类：问答

Cassandra startup issue

First, I read this this. I cannot get Cassandra up and running again. I am using Hector as my client to connect to an instance of Cassandra 0.8.2 & load my schema. Through Hector, I am using 2 d[详细]

2023-04-01 20:15 分类：问答

hector scala type mismatch

What could be wrong? val is = IntegerSerializer.get mutator.addInsertion(deviceId, COLUMN_FAMILY_CARSTATUS, createColumn(\"mileage\", 111, ss, is))}[详细]

2023-04-01 05:27 分类：问答

Cassandra hector loader app runs out of memory

This simple app takes a comma delim file with headers and puts into Cassandra. It works for small file, however the memory just goes up until out of memory exception kills it.[详细]

2023-03-30 19:45 分类：问答