lonelyss opened a new issue, #36890:
URL: https://github.com/apache/shardingsphere/issues/36890
ShardingSphere-Proxy
SHOW FULL TABLES FROM `xx` ; -> The queried data is empty
The error message is as follows：
[INFO ] 2025-10-17 07:04:01.402 [Connection-11-ThreadExecutor]
ShardingSphere-SQL - Actual SQL: write_ds ::: SHOW STATUS
[ERROR] 2025-10-17 07:04:01.454 [Connection-11-ThreadExecutor]
o.a.s.p.f.c.CommandExecutorTask - Exception occur:
java.lang.NullPointerException: Cannot invoke
"org.apache.calcite.schema.Schema.getTable(String)" because
"this.sqlFederationSchema" is null
at
org.apache.shardingsphere.sqlfederation.resultset.SQLFederationResultSetMetaData.lambda$getColumnDisplaySize$1(SQLFederationResultSetMetaData.java:101)
at java.base/java.util.Optional.flatMap(Optional.java:289)
at
org.apache.shardingsphere.sqlfederation.resultset.SQLFederationResultSetMetaData.getColumnDisplaySize(SQLFederationResultSetMetaData.java:101)
at
org.apache.shardingsphere.infra.executor.sql.execute.result.query.impl.driver.jdbc.metadata.JDBCQueryResultMetaData.getColumnLength(JDBCQueryResultMetaData.java:67)
at
org.apache.shardingsphere.proxy.backend.mysql.response.header.query.MySQLQueryHeaderBuilder.build(MySQLQueryHeaderBuilder.java:54)
at
org.apache.shardingsphere.proxy.backend.response.header.query.QueryHeaderBuilderEngine.build(QueryHeaderBuilderEngine.java:52)
at
org.apache.shardingsphere.proxy.backend.connector.DatabaseConnector.processExecuteFederation(DatabaseConnector.java:266)
at
org.apache.shardingsphere.proxy.backend.connector.DatabaseConnector.execute(DatabaseConnector.java:167)
at
org.apache.shardingsphere.proxy.frontend.mysql.command.query.text.query.MySQLComQueryPacketExecutor.execute(MySQLComQueryPacketExecutor.java:99)
at
org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.doExecuteCommand(CommandExecutorTask.java:126)
at
org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.executeCommand(CommandExecutorTask.java:121)
at
org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.run(CommandExecutorTask.java:78)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:833)
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