TeslaCN opened a new issue, #12990:
URL: https://github.com/apache/shardingsphere/issues/12990
## Bug Report
### Which version of ShardingSphere did you use?
master 4951c4c83147ff2b18b49f2834e51d5dda7382c8
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
MySQL Proxy
### Expected behavior
No exception occurs when executing DistSQL.
### Steps to reproduce the behavior, such as: SQL to execute, sharding rule
configuration, when exception occur etc.
```
jdbc:mysql://127.0.0.1:13306/sbtest?useServerPrepStmts=true&cachePrepStmts=true
```
```
try (PreparedStatement preparedStatement = connection.prepareStatement("SHOW
RESOURCES")) {
try (ResultSet rs = preparedStatement.executeQuery()) {
}
}
```
### Actual behavior
The query worked because MySQL JDBC driver request query directly as
fallback after prepare statement failed.
```
[ERROR] 2021-10-11 19:23:13.137 [ShardingSphere-Command-0]
o.a.s.p.f.c.CommandExecutorTask - Exception occur:
com.google.common.util.concurrent.UncheckedExecutionException:
org.apache.shardingsphere.sql.parser.exception.SQLParsingException: You have an
error in your SQL syntax
at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2051)
at com.google.common.cache.LocalCache.get(LocalCache.java:3951)
at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3974)
at
com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4958)
at
com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:4964)
at
org.apache.shardingsphere.infra.parser.sql.SQLStatementParserEngine.parse(SQLStatementParserEngine.java:48)
at
org.apache.shardingsphere.infra.parser.ShardingSphereSQLParserEngine.parse0(ShardingSphereSQLParserEngine.java:69)
at
org.apache.shardingsphere.infra.parser.ShardingSphereSQLParserEngine.parse(ShardingSphereSQLParserEngine.java:58)
at
org.apache.shardingsphere.proxy.frontend.mysql.command.query.binary.prepare.MySQLComStmtPrepareExecutor.execute(MySQLComStmtPrepareExecutor.java:64)
at
org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.executeCommand(CommandExecutorTask.java:99)
at
org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.run(CommandExecutorTask.java:72)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:833)
Caused by:
org.apache.shardingsphere.sql.parser.exception.SQLParsingException: You have an
error in your SQL syntax
at
org.apache.shardingsphere.sql.parser.core.database.parser.SQLParserExecutor.twoPhaseParse(SQLParserExecutor.java:68)
at
org.apache.shardingsphere.sql.parser.core.database.parser.SQLParserExecutor.parse(SQLParserExecutor.java:49)
at
org.apache.shardingsphere.sql.parser.api.SQLParserEngine.parse(SQLParserEngine.java:51)
at
org.apache.shardingsphere.infra.parser.sql.SQLStatementParserExecutor.parse(SQLStatementParserExecutor.java:47)
at
org.apache.shardingsphere.infra.parser.cache.SQLStatementCacheLoader.load(SQLStatementCacheLoader.java:40)
at
org.apache.shardingsphere.infra.parser.cache.SQLStatementCacheLoader.load(SQLStatementCacheLoader.java:29)
at
com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3529)
at
com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2278)
at
com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2155)
at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2045)
... 13 common frames omitted
```
### Reason analyze (If you can)
### Example codes for reproduce this issue (such as a github link).
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