[GitHub] [shardingsphere] TeslaCN opened a new issue, #17098: NPE occurred in ShardingSphere-Proxy PostgreSQL caused by case of column name unmatched

[GitBox <gi...@apache.org>]

TeslaCN opened a new issue, #17098:
URL: https://github.com/apache/shardingsphere/issues/17098

   ## Bug Report
   
   ### Which version of ShardingSphere did you use?
   
   Since 5.1.0
   
   ### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
   
   ShardingSphere-Proxy
   
   ### Expected behavior
   
   No error occurred.
   
   ### Actual behavior
   
   ```
   java.lang.NullPointerException: Cannot invoke "org.apache.shardingsphere.infra.metadata.schema.model.ColumnMetaData.getDataType()" because the return value of "java.util.Map.get(Object)" is null
   	at org.apache.shardingsphere.proxy.frontend.postgresql.command.query.extended.describe.PostgreSQLComDescribeExecutor.describeInsertStatementByShardingSphereMetaData(PostgreSQLComDescribeExecutor.java:152)
   	at org.apache.shardingsphere.proxy.frontend.postgresql.command.query.extended.describe.PostgreSQLComDescribeExecutor.tryDescribePreparedStatement(PostgreSQLComDescribeExecutor.java:108)
   	at org.apache.shardingsphere.proxy.frontend.postgresql.command.query.extended.describe.PostgreSQLComDescribeExecutor.describePreparedStatement(PostgreSQLComDescribeExecutor.java:100)
   	at org.apache.shardingsphere.proxy.frontend.postgresql.command.query.extended.describe.PostgreSQLComDescribeExecutor.execute(PostgreSQLComDescribeExecutor.java:84)
   	at org.apache.shardingsphere.proxy.frontend.postgresql.command.query.extended.PostgreSQLAggregatedCommandExecutor.execute(PostgreSQLAggregatedCommandExecutor.java:41)
   	at org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.executeCommand(CommandExecutorTask.java:107)
   	at org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.run(CommandExecutorTask.java:77)
   	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)
   ```
   
   ### Steps to reproduce the behavior, such as: SQL to execute, sharding rule configuration, when exception occur etc.
   
   ```SQL
   create table sbtest1
   (
       id  integer                      not null
           primary key,
       k   integer   default 0          not null,
       c   char(120) default ''::bpchar not null,
       pad char(60)  default ''::bpchar not null
   );
   ```
   
   Describe prepared statement with the following SQL:
   ```sql
   insert into sbtest1 (id, K, c, pad) values (?, ?, ?, ?) returning id, k
   ```
   
   Please notice that the `K` is upper case in SQL but lower case in DDL.
   
   ### Example codes for reproduce this issue (such as a github link).
   
   
   ```java
   public class PostgreSQLDescribePreparedStatement {
       
       public static void main(String[] args) throws Exception {
           try (Connection connection = getConnection()) {
               try (PreparedStatement preparedStatement = connection.prepareStatement("insert into sbtest1 (id, K, c, pad) values (?, ?, ?, ?) returning id, k")) {
                   ResultSetMetaData resultSetMetaData = preparedStatement.getMetaData();
               }
           }
       }
       
       @SneakyThrows
       private static Connection getConnection() {
           return DriverManager.getConnection("jdbc:postgresql://127.0.0.1:55432/sbtest_sharding?prepareThreshold=1", "postgres", "postgres");
       }
   }
   
   ```
   


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[GitHub] [shardingsphere] zjcnb closed issue #17098: NPE occurred in ShardingSphere-Proxy PostgreSQL caused by case of column name unmatched

[GitBox <gi...@apache.org>]

zjcnb closed issue #17098: NPE occurred in ShardingSphere-Proxy PostgreSQL caused by case of column name unmatched
URL: https://github.com/apache/shardingsphere/issues/17098


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