[jira] [Created] (CASSANDRA-16592) The token function in where clause return incorrect data when using token equal condition and Specified a non-exist token value

["cimon (Jira)" <ji...@apache.org>]

cimon created CASSANDRA-16592:
---------------------------------

             Summary: The token function in where clause return incorrect data when using token equal condition and Specified a non-exist token value
                 Key: CASSANDRA-16592
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16592
             Project: Cassandra
          Issue Type: Bug
            Reporter: cimon
            Assignee: cimon


I get incorrect value when use query like 'select Token(pk1,pk2),pk1,pk2 from ks.table1 where token(pk1,pk2) = tokenValue'. The returned token value mismatch the where condition.

This problem is reproduced in 3.11.3 and 4.0.

Here is my schema and select statement
{code:java}
// schema
cqlsh> desc testprefix.cprefix_03 ;CREATE TABLE testprefix.cprefix_03 (
    pk1 int,
    pk2 int,
    ck1 text,
    ck2 text,
    t1 int,
    PRIMARY KEY ((pk1, pk2), ck1, ck2)
) WITH CLUSTERING ORDER BY (ck1 ASC, ck2 ASC)
    AND additional_write_policy = '99p'
    AND bloom_filter_fp_chance = 0.01
    AND caching = {'keys': 'ALL', 'rows_per_partition': 'NONE'}
    AND cdc = false
    AND comment = ''
    AND compaction = {'class': 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy', 'max_threshold': '32', 'min_threshold': '4'}
    AND compression = {'chunk_length_in_kb': '16', 'class': 'org.apache.cassandra.io.compress.LZ4Compressor'}
    AND crc_check_chance = 1.0
    AND default_time_to_live = 0
    AND extensions = {}
    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 = 'BLOCKING'
    AND speculative_retry = '99p';


{code}
execute cql query
{code:java}
// code placeholder
cqlsh> SELECT Token(pk1,pk2), pk1,pk2  from testprefix.cprefix_03 WHERE  token(pk1, pk2) =-9223372036854775808 LIMIT 2; 
system.token(pk1, pk2) | pk1    | pk2
------------------------+--------+---------
   -9222849988925915479 | 394560 | 3394560
   -9222849988925915479 | 394560 | 3394560
(2 rows)

cqlsh> SELECT Token(pk1,pk2) from testprefix.cprefix_03 where pk1 = 394560 and pk2 = 3394560 LIMIT 2; 
system.token(pk1, pk2)
------------------------
   -9222849988925915479
   -9222849988925915479
(2 rows)

cqlsh> SELECT Token(pk1,pk2), pk1,pk2  from testprefix.cprefix_03 WHERE  token(pk1, pk2) =-9222849988925915479 LIMIT 2; 
system.token(pk1, pk2) | pk1    | pk2
------------------------+--------+---------
   -9222849988925915479 | 394560 | 3394560
   -9222849988925915479 | 394560 | 3394560
(2 rows){code}
we can find  that token value in the condition  are inconsistent with the values in the result.

--------------------------------------------------------------------------------------------

Then review the source code, to seek the anwser. 

!image-2021-04-12-20-30-14-025.png!
 * we use token equal ,so isWrapAround is true.
 * requestd.left = requestd.right = -9223372036854775808,
 * the real sst dataBoundary.left = -9222849988925915479
 * so the maxLeft return the real dataBoudary.left. We get the incorrect  data

 



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