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https://issues.apache.org/jira/browse/CASSANDRA-7018?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13974587#comment-13974587
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Aleksey Yeschenko commented on CASSANDRA-7018:
----------------------------------------------
+1
> cqlsh failing to handle utf8 decode errors in certain cases
> -----------------------------------------------------------
>
> Key: CASSANDRA-7018
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7018
> Project: Cassandra
> Issue Type: Bug
> Components: Tools
> Reporter: Colin B.
> Assignee: Mikhail Stepura
> Priority: Minor
> Labels: cqlsh
> Fix For: 1.2.17, 2.0.8, 2.1 beta2
>
> Attachments: cassandra-1.2-7018.patch
>
>
> Under certain circumstances when a row to be returned in cqlsh contains a
> utf8 decoding error, no results will be printed. It seems that certain types
> of where clauses cause the decoding to fail.
> Preparation:
> {code}
> [cqlsh 3.1.8 | Cassandra 1.2.16 | CQL spec 3.0.0 | Thrift protocol 19.36.2]
> ...
> cqlsh:ks> CREATE TABLE test_utf8 ( a text PRIMARY KEY, b text );
> cqlsh:ks> INSERT INTO test_utf8 (a, b) VALUES (blobAsText(0x3031f6393130),
> '0110');
> cqlsh:ks> select * from test_utf8;
> a | b
> -------------+------
> '01\xf6910' | 0110
> Failed to decode value '01\xf6910' (for column 'a') as text: 'utf8' codec
> can't decode byte 0xf6 in position 2: invalid start byte
> cqlsh:ks>
> {code}
> Actual Results:
> {code}
> cqlsh:ks> select * from test_utf8 where a = blobAsText(0x3031f6393130);
> value '01\xf6910' (in col 'a') can't be deserialized as text: 'utf8' codec
> can't decode byte 0xf6 in position 2: invalid start byte
> cqlsh:ks>
> {code}
> Expected Results:
> {code}
> cqlsh:ks> select * from test_utf8 where a = blobAsText(0x3031f6393130);
> a | b
> -------------+------
> '01\xf6910' | 0110
> Failed to decode value '01\xf6910' (for column 'a') as text: 'utf8' codec
> can't decode byte 0xf6 in position 2: invalid start byte
> cqlsh:ks>
> {code}
> Traceback with cqlsh --debug:
> {code}
> cqlsh:ks> select * from test_utf8 where a = blobAsText(0x3031f6393130);
> Traceback (most recent call last):
> File "bin/cqlsh", line 942, in onecmd
> self.handle_statement(st, statementtext)
> File "bin/cqlsh", line 982, in handle_statement
> return self.handle_parse_error(cmdword, tokens, parsed, srcstr)
> File "bin/cqlsh", line 991, in handle_parse_error
> return self.perform_statement(cqlruleset.cql_extract_orig(tokens, srcstr))
> File "bin/cqlsh", line 1031, in perform_statement
> with_default_limit=with_default_limit)
> File "bin/cqlsh", line 1059, in perform_statement_untraced
> self.print_result(self.cursor, with_default_limit)
> File "bin/cqlsh", line 1111, in print_result
> self.print_static_result(cursor)
> File "bin/cqlsh", line 1141, in print_static_result
> formatted_values = [map(self.myformat_value, self.decode_row(cursor,
> row), cursor.column_types) for row in cursor.result]
> File "bin/cqlsh", line 590, in decode_row
> values.append(cursor.decoder.decode_value(val, vtype, nameinfo[0]))
> File "bin/../lib/cql-internal-only-1.4.1.zip/cql-1.4.1/cql/decoders.py",
> line 54, in decode_value
> vtype.cql_parameterized_type())
> File "bin/../lib/cql-internal-only-1.4.1.zip/cql-1.4.1/cql/decoders.py",
> line 33, in value_decode_error
> % (valuebytes, namebytes, expectedtype, err))
> ProgrammingError: value '01\xf6910' (in col 'a') can't be deserialized as
> text: 'utf8' codec can't decode byte 0xf6 in position 2: invalid start byte
> cqlsh:ks>
> {code}
> Problematic statements:
> {code}
> cqlsh:ks> select * from test_utf8 where token(a) > 0;
> cqlsh:ks> select * from test_utf8 where a in (blobAsText(0x3031f6393130));
> cqlsh:ks> select * from test_utf8 where a = blobAsText(0x3031f6393130);
> {code}
> Statements that are ok:
> {code}
> cqlsh:ks> select * from test_utf8 where token(a) < token('qwer');
> cqlsh:ks> select * from test_utf8;
> {code}
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