joooohnli opened a new issue #1935: Route error when query table sharded by string column URL: https://github.com/apache/incubator-shardingsphere/issues/1935 ## Bug Report **For English only**, other languages will not accept. Before report a bug, make sure you have: - Searched open and closed [GitHub issues](https://github.com/sharding-sphere/sharding-sphere/issues). - Read documentation: [ShardingSphere Doc](http://shardingsphere.io/document/current/en/overview/). Please pay attention on issues you submitted, because we maybe need more details. If no response **more than 7 days** and we cannot reproduce it on current information, we will **close it**. Please answer these questions before submitting your issue. Thanks! ### Which version of ShardingSphere did you use? 3.1.0 ### Which project did you use? Sharding-JDBC or Sharding-Proxy? Sharding-JDBC ### Expected behavior no error ### Actual behavior ``` ERROR 3054 (HY000): Unknown exception: java.lang.Integer cannot be cast to java.lang.String ``` ### Reason analyze (If you can) ### Steps to reproduce the behavior, such as: SQL to execute, sharding rule configuration, when exception occur etc. 1. configure a string column A as sharding column. 2. select * from x where A='abc'; 3. error my preciseAlgorithmClass： ``` public class StringHash128By30Char implements PreciseShardingAlgorithm<String> { private PartitionByString partitionByString = new PartitionByString(128, ":30"); @Override public String doSharding(Collection<String> availableTargetNames, PreciseShardingValue<String> shardingValue) { for (String availableTargetName : availableTargetNames) { Integer calculate = partitionByString.calculate(shardingValue.getValue()); String suffix = String.format("_%03d", calculate); if (availableTargetName.endsWith(suffix)) { return availableTargetName; } } throw new UnsupportedOperationException("sharding value:" + shardingValue); } } ``` I debug and find shardingValue.value=-1 ### Example codes for reproduce this issue (such as a github link).
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