chenliang7558 opened a new issue, #18961: URL: https://github.com/apache/shardingsphere/issues/18961
## 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/apache/shardingsphere/issues). - Read documentation: [ShardingSphere Doc](https://shardingsphere.apache.org/document/current/en/overview). Please pay attention on issues you submitted, because we maybe need more details. If no response anymore 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? 5.1.2 ### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy? proxy ### Expected behavior I use custom algorithm in shardingsphere-proxy, the version is 5.1.2 ,and config is : ``` schemaName: orders dataSources: db_0: url: jdbc:mysql://127.0.0.1:3306/db_0?serverTimezone=Asia/Shanghai&useSSL=false username: root password: 123456 connectionTimeoutMilliseconds: 30000 idleTimeoutMilliseconds: 60000 maxLifetimeMilliseconds: 1800000 maxPoolSize: 50 minPoolSize: 10 db_1: url: jdbc:mysql://127.0.0.1:3306/db_1?serverTimezone=Asia/Shanghai&useSSL=false username: root password: 123456 connectionTimeoutMilliseconds: 30000 idleTimeoutMilliseconds: 60000 maxLifetimeMilliseconds: 1800000 maxPoolSize: 50 minPoolSize: 10 rules: - !SHARDING tables: t_order: actualDataNodes: db_${0..1}.t_order_${0..3} tableStrategy: standard: shardingColumn: user_id shardingAlgorithmName: t_order_inline defaultDatabaseStrategy: standard: shardingColumn: order_id shardingAlgorithmName: db_modulo defaultTableStrategy: none: shardingAlgorithms: db_modulo: type: CUSTOM_SHARD t_order_inline: type: INLINE props: algorithm-expression: t_order_${user_id % 2} ``` my MySQL version is 5.6.48; create table sql: ``` create database db_0; CREATE TABLE `t_order_0` ( `id` int(11) NOT NULL AUTO_INCREMENT, `order_id` bigint(20) DEFAULT NULL, `user_id` bigint(20) DEFAULT NULL, `status` varchar(45) DEFAULT NULL, PRIMARY KEY (`id`) USING BTREE ) ENGINE=InnoDB DEFAULT CHARSET=utf8; CREATE TABLE `t_order_1` ( `id` int(11) NOT NULL AUTO_INCREMENT, `order_id` bigint(20) DEFAULT NULL, `user_id` bigint(20) DEFAULT NULL, `status` varchar(45) DEFAULT NULL, PRIMARY KEY (`id`) USING BTREE ) ENGINE=InnoDB DEFAULT CHARSET=utf8; create database db_1; ... ``` my custom algorithm code ``` public class CustomShardingDbAlgorithm implements StandardShardingAlgorithm<Long> { @Override public String doSharding(Collection<String> availableTargetNames, PreciseShardingValue<Long> preciseShardingValue) { Long shardCol = preciseShardingValue.getValue(); return null; } @Override public String getType() { return "CUSTOM_SHARD"; } } ``` then I use navicat connect to sharding-proxy. Insert data using the SQL as follows ``` INSERT INTO `t_order` ( `order_id`, `user_id`, `status`) VALUES ( 100000 ,100000, 'test'); ``` Exception occurred. ### Actual behavior ``` [ERROR] 2022-07-08 17:21:52.112 [ShardingSphere-Command-0] o.a.s.p.f.c.CommandExecutorTask - Exception occur: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Long at com.yuanian.shard.config.algorithm.CustomShardingDbAlgorithm.doSharding(CustomShardingDbAlgorithm.java:29) at org.apache.shardingsphere.sharding.route.strategy.type.standard.StandardShardingStrategy.doSharding(StandardShardingStrategy.java:83) at org.apache.shardingsphere.sharding.route.strategy.type.standard.StandardShardingStrategy.doSharding(StandardShardingStrategy.java:71) at org.apache.shardingsphere.sharding.route.engine.type.standard.ShardingStandardRoutingEngine.routeDataSources(ShardingStandardRoutingEngine.java:218) at org.apache.shardingsphere.sharding.route.engine.type.standard.ShardingStandardRoutingEngine.route0(ShardingStandardRoutingEngine.java:206) at org.apache.shardingsphere.sharding.route.engine.type.standard.ShardingStandardRoutingEngine.routeByShardingConditionsWithCondition(ShardingStandardRoutingEngine.java:127) at org.apache.shardingsphere.sharding.route.engine.type.standard.ShardingStandardRoutingEngine.routeByShardingConditions(ShardingStandardRoutingEngine.java:117) at org.apache.shardingsphere.sharding.route.engine.type.standard.ShardingStandardRoutingEngine.getDataNodes(ShardingStandardRoutingEngine.java:94) at org.apache.shardingsphere.sharding.route.engine.type.standard.ShardingStandardRoutingEngine.route(ShardingStandardRoutingEngine.java:70) at org.apache.shardingsphere.sharding.route.engine.ShardingSQLRouter.createRouteContext(ShardingSQLRouter.java:58) at org.apache.shardingsphere.sharding.route.engine.ShardingSQLRouter.createRouteContext(ShardingSQLRouter.java:45) at org.apache.shardingsphere.infra.route.engine.impl.PartialSQLRouteExecutor.route(PartialSQLRouteExecutor.java:69) at org.apache.shardingsphere.infra.route.engine.SQLRouteEngine.route(SQLRouteEngine.java:55) at org.apache.shardingsphere.infra.context.kernel.KernelProcessor.route(KernelProcessor.java:58) at org.apache.shardingsphere.infra.context.kernel.KernelProcessor.generateExecutionContext(KernelProcessor.java:47) at org.apache.shardingsphere.proxy.backend.communication.jdbc.JDBCDatabaseCommunicationEngine.execute(JDBCDatabaseCommunicationEngine.java:127) at org.apache.shardingsphere.proxy.backend.communication.jdbc.JDBCDatabaseCommunicationEngine.execute(JDBCDatabaseCommunicationEngine.java:73) at org.apache.shardingsphere.proxy.backend.text.data.impl.SchemaAssignedDatabaseBackendHandler.execute(SchemaAssignedDatabaseBackendHandler.java:61) at org.apache.shardingsphere.proxy.frontend.mysql.command.query.text.query.MySQLComQueryPacketExecutor.execute(MySQLComQueryPacketExecutor.java:103) at org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.executeCommand(CommandExecutorTask.java:116) at org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.run(CommandExecutorTask.java:81) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) ``` ### Reason analyze (If you can) I think the exception happened here:`SQLVisitorEngine# visit(ParseASTNode)` ``` public <T> T visit(final ParseASTNode parseASTNode) { ParseTreeVisitor<T> visitor = SQLVisitorFactory.newInstance(databaseType, visitorType, SQLVisitorRule.valueOf(parseASTNode.getRootNode().getClass()), props); T result = parseASTNode.getRootNode().accept(visitor); if (isParseComment) { appendSQLComments(parseASTNode, result); } return result; } ``` ### Steps to reproduce the behavior, such as: SQL to execute, sharding rule configuration, when exception occur etc. server.yaml ``` mode: type: Cluster repository: type: ZooKeeper props: namespace: governance_local server-lists: zkserver1:2181 retryIntervalMilliseconds: 600 timeToLiveSeconds: 1500 maxRetries: 3 overwrite: false rules: - !AUTHORITY users: - root@%:root - sharding@:sharding provider: type: ALL_PRIVILEGES_PERMITTED - !TRANSACTION defaultType: LOCAL props: max-connections-size-per-query: 5 # 每次查询的最大连接消耗数 kernel-executor-size: 16 proxy-frontend-flush-threshold: 128 proxy-opentracing-enabled: false proxy-hint-enabled: false sql-show: false check-table-metadata-enabled: false show-process-list-enabled: false proxy-backend-query-fetch-size: -1 check-duplicate-table-enabled: false proxy-frontend-executor-size: 0 proxy-backend-executor-suitable: OLAP proxy-frontend-max-connections: 0 sql-federation-enabled: false proxy-backend-driver-type: JDBC proxy-mysql-default-version: 5.6.48 ``` ### Example codes for reproduce this issue (such as a github link). -- This is an automated message from the Apache Git Service. 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