问题描述
CQL 5.0.1 版
Cassandra 版本 3.11.9
root@3fdb49de030c:/# cqlsh
Connected to Test Cluster at 127.0.0.1:1234.
[cqlsh 5.0.1 | Cassandra 3.11.9 | CQL spec 3.4.4 | Native protocol v4]
Use HELP for help.
cqlsh>
插入相同记录时（如下图），
cqlsh> use mykeyspace;
cqlsh:mykeyspace>
cqlsh:mykeyspace>
cqlsh:mykeyspace>
cqlsh:mykeyspace>
cqlsh:mykeyspace> select * from mytable ;
column1 | column2 | column3 | column4 | column5 | column6
--------------------------------------+--------------------------------------+---------------------------------+-------------------+---------------------------------+--------------
54dc8b12-a934-4f2e-8a0d-e7eba3faa47e | 587df674-bc77-481b-b974-ddebd203e371 | 2021-04-02 13:29:37.841000+0000 | [email protected] | 2021-04-02 13:29:37.841000+0000 | [{"abc": "def"}]
(1 rows)
cqlsh:mykeyspace>
cqlsh:mykeyspace>
cqlsh:mykeyspace>
cqlsh:mykeyspace> // does not give error on changin non-primary key columns
cqlsh:mykeyspace> INSERT INTO mytable (column1,column2,column4,column6,column3,column5) VALUES (54dc8b12-a934-4f2e-8a0d-e7eba3faa47e,587df674-bc77-481b-b974-ddebd203e371,'[email protected]','xyz',toTimestamp(now()),toTimestamp(now()));
cqlsh:mykeyspace>
cqlsh:mykeyspace>
cqlsh:mykeyspace> select * from mytable ;
column1 | column2 | column3 | column4 | column5 | column6
--------------------------------------+--------------------------------------+---------------------------------+-------------------+---------------------------------+--------------
54dc8b12-a934-4f2e-8a0d-e7eba3faa47e | 587df674-bc77-481b-b974-ddebd203e371 | 2021-04-02 13:29:37.841000+0000 | [email protected] | 2021-04-02 13:29:37.841000+0000 | xyz
(1 rows)
cqlsh:mykeyspace>
cqlsh:mykeyspace>
cqlsh:mykeyspace>
cqlsh:mykeyspace>
cqlsh:mykeyspace>
cqlsh:mykeyspace> // does not give error on changing one of the primary key column
cqlsh:mykeyspace> INSERT INTO mytable (column1,587df674-bc77-481b-b974-ddebd203e372,'garbage',toTimestamp(now()));
cqlsh:mykeyspace>
cqlsh:mykeyspace>
cqlsh:mykeyspace>
cqlsh:mykeyspace> select * from mytable ; // PK(column1:column2)
column1 | column2 | column3 | column4 | column5 | column6
--------------------------------------+--------------------------------------+---------------------------------+---------------+---------------------------------+-----------------------
54dc8b12-a934-4f2e-8a0d-e7eba3faa47e | 587df674-bc77-481b-b974-ddebd203e371 | 2020-04-02 14:20:24.028000+0000 | [email protected] | 2020-04-02 14:20:24.028000+0000 | xyz
54dc8b12-a934-4f2e-8a0d-e7eba3faa47e | 587df674-bc77-481b-b974-ddebd203e372 | 2020-04-02 14:26:55.101000+0000 | garbage | 2020-04-02 14:26:55.101000+0000 | garbage
(2 rows)
cqlsh:mykeyspace>
cqlsh:mykeyspace>
cqlsh:mykeyspace>
cqlsh:mykeyspace> DESCRIBE TABLE mytable;
CREATE TABLE mykeyspace.mytable (
column1 uuid,column2 uuid,column3 timestamp,column4 text,column5 timestamp,column6 text,PRIMARY KEY (column1,column2)
)WITH CLUSTERING ORDER BY (column2 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:mykeyspace>
cqlsh:mykeyspace>
cqlsh:mykeyspace>
在插入重复记录（具有相同的主键）时，Cassandra 是否不显示错误？ 而是更新记录
如果没有，如何在使用 gocql 插入相同记录时错误处理重复记录？对于 http POST 请求...我们还没有使用幂等键
RDBMS SQL 服务器给出类似 Cannot insert duplicate key row 的错误
解决方法
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