>> I have created this column family using CQL and defined the primary key >> as What was the create table statement ?
>> BadRequestException: [host=localhost(127.0.0.1):9160, latency=6(6), >> attempts=1]InvalidRequestException(why:Not enough bytes to read value of >> component 0) Unless the CQL 3 create table statement specifies USE COMPACT_STORAGE it will use composites in the row keys and Astyanax may not be expected this. Unless astyanax specifically says it can write to CQL 3 tables it's best to only access them using CQL 3. Cheers ----------------- Aaron Morton Freelance Cassandra Consultant New Zealand @aaronmorton http://www.thelastpickle.com On 2/04/2013, at 6:07 PM, "Hiller, Dean" <dean.hil...@nrel.gov> wrote: > We ran into some similar errors in playorm development. Basically, you > defined a composite probably but are not correctly using that composite. > I am not sure about queries though as we had the issue when saving data > (ie. Using deviceID+deviceName did not work and we had to create an full > blown composite object). I think you need to read up on how astyanax > works with compositesŠ..I am not sure this is a cassandra question > reallyŠ.more of an astyanax one. > > Dean > > On 4/1/13 11:48 PM, "Apurva Jalit" <apurva.ja...@gmail.com> wrote: > >> I have a scheme as follows: >> >> TimeStamp >> Device ID >> Device Name >> Device Owner >> Device location >> >> I have created this column family using CQL and defined the primary key >> as >> (TimeStamp,Device ID, Device Name). Through a serializable object that >> has >> fields for DeviceID, name and a field name (which stores either Device >> Owner or >> Device Location). I have inserted some records using Astyanax. >> >> As per my understanding, the columns for a row are created by combining >> Device >> ID, Device Name and field name as column name and the value to be the >> value for >> that particular field. Thus for a particular timestamp and device, the >> column >> names would be in the pattern (Device ID:Device Name: ...). >> >> So I believe we can use these 2 fields as prefix to obtain all the >> entries for a >> particular time-device combination. >> >> I am using the following query to obtain the results: >> >> RowSliceQuery<String, ApBaseData> query = adu.keyspace >> .prepareQuery(columnFamily) >> .getKeySlice(timeStamp) >> .withColumnRange(new RangeBuilder() >> .setStart(deviceID+deviceName+"_\u00000") >> .setEnd(deviceID+deviceName+"_\uffff") >> .setLimit(batch_size) >> .build()); >> >> But on executing the above query I get the following Exception: >> >> BadRequestException: [host=localhost(127.0.0.1):9160, latency=6(6), >> attempts=1]InvalidRequestException(why:Not enough bytes to read value of >> component 0) >> >> Can any one help to understand where am I going wrong? >> >> >
