David Capwell created CASSANDRA-17857:
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Summary: 4.1's upsert with adder support is not consistent with
numbers and strings
Key: CASSANDRA-17857
URL: https://issues.apache.org/jira/browse/CASSANDRA-17857
Project: Cassandra
Issue Type: Bug
Components: CQL/Semantics, Feature/Lightweight Transactions
Reporter: David Capwell
Assignee: David Capwell
In 4.1 UPDATE name = name + offset support got extended to numbers and strings
(not just counters) but the behavior isn’t consistent
Number: throws a error due to Int32Type.add(null, 42) failing
String: returns the non-null updated values
What Postgres does is keeps the value null
{code}
postgres=# create table x (pk int PRIMARY KEY, a int, b text);
CREATE TABLE
postgres=# insert into x (pk, a, b) values(0, null, null);
INSERT 0 1
postgres=# UPDATE x SET a = a + 1 WHERE pk = 0;
UPDATE 1
postgres=# select * from x;
pk | a | b
----+---+---
0 | |
(1 row)
postgres=# UPDATE x SET b = b + 'one' WHERE pk = 0;
ERROR: operator does not exist: text + unknown
LINE 1: UPDATE x SET b = b + 'one' WHERE pk = 0;
^
HINT: No operator matches the given name and argument types. You might need to
add explicit type casts.
postgres=# UPDATE x SET b = b + CAST('one' as text) WHERE pk = 0;
ERROR: operator does not exist: text + text
LINE 1: UPDATE x SET b = b + CAST('one' as text) WHERE pk = 0;
^
HINT: No operator matches the given name and argument types. You might need to
add explicit type casts.
{code}
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