Example: cqlsh> use dc_god_emperor ; cqlsh:dc_god_emperor> create table data ( id int primary key, value text ) ; cqlsh:dc_god_emperor> insert into data JSON'{"id": 1, "value": "hello world"}' ... ; cqlsh:dc_god_emperor> select * from data;
id | value ----+------------- 1 | hello world (1 rows) Peter On Wed, Feb 1, 2017 at 3:06 AM, Benjamin Roth <benjamin.r...@jaumo.com> wrote: > Value is defined as text column and you try to insert a double. That's > simply not allowed > > Am 01.02.2017 09:02 schrieb "Rajeswari Menon" <rajeswar...@thinkpalm.com>: > >> Given below is the sql query I executed. >> >> >> >> *insert* *into* data JSON'{ >> >> "id": 1, >> >> "address":"", >> >> "datatype":"DOUBLE", >> >> "name":"Longitude", >> >> "attributes":{ >> >> "ID":"1" >> >> }, >> >> "category":"REAL", >> >> "value":1.390692, >> >> "timestamp":1485923271718, >> >> "quality":"GOOD" >> >> }'; >> >> >> >> Regards, >> >> Rajeswari >> >> >> >> *From:* Benjamin Roth [mailto:benjamin.r...@jaumo.com] >> *Sent:* 01 February 2017 12:35 >> *To:* user@cassandra.apache.org >> *Subject:* Re: Is it possible to have a column which can hold any data >> type (for inserting as json) >> >> >> >> You should post the whole CQL query you try to execute! Why don't you use >> a native JSON type for your JSON data? >> >> >> >> 2017-02-01 7:51 GMT+01:00 Rajeswari Menon <rajeswar...@thinkpalm.com>: >> >> Hi, >> >> >> >> I have a json data as shown below. >> >> >> >> { >> >> "address":"127.0.0.1", >> >> "datatype":"DOUBLE", >> >> "name":"Longitude", >> >> "attributes":{ >> >> "Id":"1" >> >> }, >> >> "category":"REAL", >> >> "value":1.390692, >> >> "timestamp":1485923271718, >> >> "quality":"GOOD" >> >> } >> >> >> >> To store the above json to Cassandra, I defined a table as shown below >> >> >> >> *create* *table* data >> >> ( >> >> id *int* *primary* *key*, >> >> address text, >> >> datatype text, >> >> name text, >> >> *attributes* *map* < text, text >, >> >> category text, >> >> value text, >> >> "timestamp" *timestamp*, >> >> quality text >> >> ); >> >> >> >> When I try to insert the data as JSON I got the error : *Error decoding >> JSON value for value: Expected a UTF-8 string, but got a Double: 1.390692*. >> The message is clear that a double value cannot be inserted to text column. >> The real issue is that the value can be of any data type, so the schema >> cannot be predefined. Is there a way to create a column which can hold >> value of any data type. (I don’t want to hold the entire json as string. My >> preferred way is to define a schema.) >> >> >> >> Regards, >> >> Rajeswari >> >> >> >> >> >> -- >> >> Benjamin Roth >> Prokurist >> >> Jaumo GmbH · www.jaumo.com >> Wehrstraße 46 · 73035 Göppingen · Germany >> Phone +49 7161 304880-6 <07161%203048806> · Fax +49 7161 304880-1 >> <07161%203048801> >> AG Ulm · HRB 731058 · Managing Director: Jens Kammerer >> >