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https://issues.apache.org/jira/browse/CASSANDRA-13592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16068410#comment-16068410
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ZhaoYang edited comment on CASSANDRA-13592 at 6/30/17 4:53 AM:
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Thanks.. Yes, it's better solve it within {{type.toJSONString}}
I will add test the specification of {{type.toJSONString}}. all should not
change buffer position.
Got a question about {{DurationType.toJSONString()}}, imo, it should return
string value with double quote {{"-2h9m"}}, like {{TimeType.toJSONString()}}.
but it only returns string value {{-2h9m}} . Is it expected? it would be
different from user's json input.
One more thing is about: EmptyType. it should directly {{return "\"\"";}}
instead of using parent method which causes null-pointer exception. EmptyType
seems not used for json-path, but good to keep it safe.
was (Author: jasonstack):
Thanks.. Yes, it's better solve it within {{type.toJSONString}}
I will add test the specification of {{type.toJSONString}}. all should not
change buffer position.
Got a question about {{DurationType.toJSONString()}}, imo, it should return
string value with double quote {{"-2h9m"}}, like {{TimeType.toJSONString()}}.
but it only returns string value {{-2h9m}} . Is it expected? it would be
different from user input.
One more thing is about: EmptyType. it should directly {{return "\"\"";}}
instead of using parent method which causes null-pointer exception. EmptyType
seems not used for json-path, but good to keep it safe.
> Null Pointer exception at SELECT JSON statement
> -----------------------------------------------
>
> Key: CASSANDRA-13592
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13592
> Project: Cassandra
> Issue Type: Bug
> Components: CQL
> Environment: Debian Linux
> Reporter: Wyss Philipp
> Assignee: ZhaoYang
> Labels: beginner
> Attachments: system.log
>
>
> A Nulll pointer exception appears when the command
> {code}
> SELECT JSON * FROM examples.basic;
> ---MORE---
> <Error from server: code=0000 [Server error]
> message="java.lang.NullPointerException">
> Examples.basic has the following description (DESC examples.basic;):
> CREATE TABLE examples.basic (
> key frozen<tuple<uuid, int>> PRIMARY KEY,
> wert text
> ) WITH 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';
> {code}
> The error appears after the ---MORE--- line.
> The field "wert" has a JSON formatted string.
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