Hi, Ben Slater, thank you very much for your replay!
my cassandra version is 3.7, so I think there must be some thing I
misunderstand ahout frozen type. I add a comma between } and ‘work’, the
result is like below. Is there some special form about " type frozen"?
cqlsh:counterks> INSERT INTO user (name, addresses) VALUES ('z3 Pr3z1den7',
{'home' : {street: '1600 Pennsylvania Ave NW',city: 'Washington',zip:
'20500',phones: { 'cell' : { country_code: 1, number: '202 456-1111'
},'landline' : { country_code: 1, number: '...' } }},'work' : {street: '1600
Pennsylvania Ave NW',city: 'Washington',zip: '20500',phones: { 'fax' : {
country_code: 1, number: '...' } }}});
InvalidRequest: code=2200 [Invalid query] message="Invalid map literal for
addresses: value {city: 'Washington', zip: '20500', street: '1600 Pennsylvania
Ave NW', phones: {'cell': {number: '202 456-1111', country_code: 1},
'landline': {number: '...', country_code: 1}}} is not of type frozen<address>"
my create statements about table and type are:
cqlsh:counterks> CREATE TYPE phone ( country_code int, number text, );
cqlsh:counterks> CREATE TYPE address ( street text, city text, zip
int, phones map<text, frozen<phone>> );
cqlsh:counterks> CREATE TABLE user (
... name text PRIMARY KEY,
... addresses map<text, frozen<address>>
... );
zha...@easemob.com
From: Ben Slater
Date: 2016-09-28 11:29
To: user
Subject: Re: ask for help about exmples of Data Types the document shows
Hi,
I think you are right about the typo in (1). For (2), I think you’re missing a
comma between } and ‘work’ so the JSON is invalid.
I think reading this JIRA https://issues.apache.org/jira/browse/CASSANDRA-7423
that the change requiring a UDT as part of a collection to be explicitly
marked as frozen is relatively recent (3.6) so the doco may be out date there.
Cheers
Ben
On Wed, 28 Sep 2016 at 13:12 zha...@easemob.com <zha...@easemob.com> wrote:
hi, everyone, I'm learning Cassandra now , and have some problems about the
document of "Data Types" . I don't know where to report or ask for help, so
I'm very sorry if this mail bother you.
In the chapter The Cassandra Query Language (CQL)/Data Types
(http://cassandra.apache.org/doc/latest/cql/types.html), I'm confused with two
examples the document showing below. My enviroment is:
CentOS release 6.8 (Final)
java version "1.8.0_91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)
Python 2.7.11
Cassandra version: 3.7
CQL version: [cqlsh 5.0.1 | Cassandra 3.7 | CQL spec 3.4.2 | Native protocol v4]
1、 in http://cassandra.apache.org/doc/latest/cql/types.html, when describing
type set, the giving example is:
CREATE TABLE images (
name text PRIMARY KEY,
owner text,
tags set<text> // A set of text values
);
INSERT INTO images (name, owner, tags)
VALUES ('cat.jpg', 'jsmith', { 'pet', 'cute' });
// Replace the existing set entirely
UPDATE images SET tags = { 'kitten', 'cat', 'lol' } WHERE id = 'jsmith';
the update cql statement uses "WHERE id = 'jsmith'" while the table images did
not define key "id". I think it's just a slip of the pen.
2、 in http://cassandra.apache.org/doc/latest/cql/types.html, when describing
“User-Defined Types”, the giving example is:
CREATE TYPE phone (
country_code int,
number text,
)
CREATE TYPE address (
street text,
city text,
zip int,
phones map<text, phone>
)
CREATE TABLE user (
name text PRIMARY KEY,
addresses map<text, frozen<address>>
)
and when I try to create type address, one error occur:
cqlsh:counterks> CREATE TYPE address (
... street text,
... city text,
... zip int,
... phones map<text, phone>
... );
InvalidRequest: code=2200 [Invalid query] message="Non-frozen UDTs are not
allowed inside collections: map<text, phone>"
I change the create statement, like:
CREATE TYPE address (
street text,
city text,
zip int,
phones map<text, frozen<phone>>
);
it works, and the create table user statement works well. Unfortunately, when
running the insert statement below, error occur:
INSERT INTO user (name, addresses)
VALUES ('z3 Pr3z1den7', {
'home' : {
street: '1600 Pennsylvania Ave NW',
city: 'Washington',
zip: '20500',
phones: { 'cell' : { country_code: 1, number: '202 456-1111'
},
'landline' : { country_code: 1, number: '...' } }
}
'work' : {
street: '1600 Pennsylvania Ave NW',
city: 'Washington',
zip: '20500',
phones: { 'fax' : { country_code: 1, number: '...' } }
}
})
error:
SyntaxException: <ErrorMessage code=2000 [Syntax error in CQL query]
message="line 10:14 mismatched input 'work' expecting '}' (...: '...' } }
} ['wor]k' :...)">
Is the any suggestion about the problem 2?
Best wishes for everyone, thank you for your watching !
zha...@easemob.com
--
————————
Ben Slater
Chief Product Officer
Instaclustr: Cassandra + Spark - Managed | Consulting | Support
+61 437 929 798
