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https://issues.apache.org/jira/browse/CASSANDRA-18628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17737356#comment-17737356
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Ke Han commented on CASSANDRA-18628:
------------------------------------
[~brandon.williams] Thanks for the reply! But it don't work actually. Here are
the exceptions I got when running 3.11.15.
{code:java}
cqlsh> DESC ks.tb ;
CREATE TABLE ks.tb (
c2 int,
c5 text,
c3 text,
rjr int,
"is" int,
c1 int,
ds int,
c4 text,
PRIMARY KEY (c2, c5, c3, rjr, "is", c1, ds, c4)
) WITH CLUSTERING ORDER BY (c5 ASC, c3 ASC, rjr ASC, "is" ASC, c1 ASC, ds ASC,
c4 ASC)
AND bloom_filter_fp_chance = 0.01
AND caching = {'keys': 'ALL', 'rows_per_partition': 'NONE'}
AND comment = ''
AND compaction = {'class':
'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy',
'max_threshold': '32', 'min_threshold': '4'}
AND compression = {'chunk_length_in_kb': '64', 'class':
'org.apache.cassandra.io.compress.LZ4Compressor'}
AND crc_check_chance = 1.0
AND dclocal_read_repair_chance = 0.1
AND default_time_to_live = 0
AND gc_grace_seconds = 864000
AND max_index_interval = 2048
AND memtable_flush_period_in_ms = 0
AND min_index_interval = 128
AND read_repair_chance = 0.0
AND speculative_retry = '99PERCENTILE';
cqlsh> SELECT c2, ds, "Is", c4 FROM ks.tb WHERE c2 = 1566089765 AND c5 =
'teststring1' AND c3 = 'teststring2' AND rJr = -1012111692;
InvalidRequest: Error from server: code=2200 [Invalid query] message="Undefined
column name "Is""
cqlsh> SELECT c2, ds, \"Is\", c4 FROM ks.tb WHERE c2 = 1566089765 AND c5 =
'teststring1' AND c3 = 'teststring2' AND rJr = -1012111692;
Invalid syntax at line 1, char 16
SELECT c2, ds, \"Is\", c4 FROM ks.tb WHERE c2 = 1566089765 AND c5 =
'teststring1' AND c3 = 'teststring2' AND rJr = -1012111692;
^
cqlsh> SELECT c2, ds, 'Is', c4 FROM ks.tb WHERE c2 = 1566089765 AND c5 =
'teststring1' AND c3 = 'teststring2' AND rJr = -1012111692;
InvalidRequest: Error from server: code=2200 [Invalid query] message="Cannot
infer type for term 'Is' in selection clause (try using a cast to force a
type)" {code}
> Handle special column name when upgrading from 2.2.19 to 3.0.29/3.11.15
> -----------------------------------------------------------------------
>
> Key: CASSANDRA-18628
> URL: https://issues.apache.org/jira/browse/CASSANDRA-18628
> Project: Cassandra
> Issue Type: Bug
> Components: CQL/Interpreter
> Reporter: Ke Han
> Priority: Normal
>
> When I was migrating from 2.2.19 to 3.0.29/3.11.15, I noticed some of my
> columns could not be accessed because of the syntax problem. I had a column
> named "Is" in the 2.x. However, after the upgrade process, when I try to
> perform the same select command, it throws an exception since "Is" will be
> interpreted separately.
> I observed this after my cluster was fully upgraded. I cannot downgrade it
> back to 2.2.19. I cannot rename this column directly either.
> h2. Steps to reproduce
> Execute the following commands in Cassandra-2.2.19 (single node)
> {code:java}
> CREATE KEYSPACE ks WITH REPLICATION = { 'class' : 'SimpleStrategy',
> 'replication_factor' : 2 };
> CREATE TABLE IF NOT EXISTS ks.tb (c1 INT,c2 INT,c3 TEXT,rJr INT,c4 TEXT,c5
> TEXT,ds INT, Is INT,
> PRIMARY KEY (c2, c5, c3, rJr, Is, c1, ds, c4 ));
> SELECT c2, ds, Is, c4 FROM ks.tb WHERE c2 = 1566089765 AND c5 = 'teststring1'
> AND c3 = 'teststring2' AND rJr = -1012111692;
> c2 | ds | is | c4
> ----+----+----+----
> (0 rows){code}
> Then perform an upgrade to Cassandra-3.0.29/Cassandra-3.11.15
> {code:java}
> // Do the same select
> SELECT c2, ds, Is, c4 FROM ks.tb WHERE c2 = 1566089765 AND c5 = 'teststring1'
> AND c3 = 'teststring2' AND rJr = -1012111692;
> SyntaxException: line 1:15 no viable alternative at input 'Is' (SELECT c2,
> ds, [Is]...){code}
> The column still exists in the table, but I cannot access it.
> I am wondering whether I can directly rename it in the new version or get
> some prompts telling me to rename is before the upgrade process. "Is" is also
> not marked as a reserved word in the [CQL Keywords
> doc|https://docs.datastax.com/en/cql-oss/3.3/cql/cql_reference/keywords_r.html]).
> Any help is appreciated!
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