[GitHub] [incubator-shardingsphere] gfreezy opened a new pull request #3547: `getResultSet` should return null after `executeUpdate`

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

gfreezy opened a new pull request #3547: `getResultSet` should return null after `executeUpdate`
URL: https://github.com/apache/incubator-shardingsphere/pull/3547
 
 
   Fixes #3523.
   
   According to the doc of  interface `Statement`, `Statement.getResultSet` should return `null` when `the result is an update count`.
   
   ```java
   
       /**
        *  Retrieves the current result as a <code>ResultSet</code> object.
        *  This method should be called only once per result.
        *
        * @return the current result as a <code>ResultSet</code> object or
        * <code>null</code> if the result is an update count or there are no more results
        * @exception SQLException if a database access error occurs or
        * this method is called on a closed <code>Statement</code>
        * @see #execute
        */
       ResultSet getResultSet() throws SQLException;
   
   ```

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