Nadav Har'El created CASSANDRA-21743:
----------------------------------------
Summary: SELECT JSON of an empty boolean value fails with
NullPointerException
Key: CASSANDRA-21743
URL: https://issues.apache.org/jira/browse/CASSANDRA-21743
Project: Apache Cassandra
Issue Type: Bug
Reporter: Nadav Har'El
A boolean column can hold an empty (zero-length) value, which is different from
null. Reading it normally works (the driver returns null), but SELECT JSON
fails with a server error:
{code:sql}
CREATE TABLE ks.t (p int PRIMARY KEY, v boolean);
INSERT INTO ks.t (p, v) VALUES (1, blobAsBoolean(0x));
SELECT v FROM ks.t; -- works
SELECT JSON v FROM ks.t; -- fails
{code}
The SELECT JSON fails with:
{noformat}
Server error: java.lang.NullPointerException: Cannot invoke
"java.lang.Boolean.toString()" because the return value of
"org.apache.cassandra.serializers.TypeSerializer.deserialize(java.nio.ByteBuffer)"
is null
{noformat}
For other types this already works: SELECT JSON of an empty int, bigint, float,
double, decimal, varint, timestamp, uuid, timeuuid, inet or text value returns
an empty string, "". Most of these cases are covered by cql3/EmptyValuesTest,
which was added with the fix for CASSANDRA-15896 (the same NullPointerException
for an empty UUID; the commit message says "CASSANDRA-1589", apparently a
typo). But EmptyValuesTest has no test for boolean (nor for varint or tinyint),
which is probably how this case was missed.
The cause is that BooleanType.toJSONString() calls
getSerializer().deserialize(buffer).toString(), and deserializing an empty
buffer returns null. Other types handle this case - e.g.,
Int32Type.toJSONString() returns "\"\"" for an empty value.
Reproduced on Cassandra 5.0.9 and 6.0-alpha2.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
