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JDBC prepared statement returns NullPointerException

See original GitHub issue

Expected behavior and actual behavior

Calling a prepared statement via jdbc interface returns NullPointerException

Exception in thread “main” java.lang.NullPointerException at com.orientechnologies.orient.jdbc.OrientJdbcResultSetMetaData.getColumnType(OrientJdbcResultSetMetaData.java:192) at TestOrientdb.main(TestOrientdb.java:42)

A prepared statement should work without problems via jdbc interface.

Steps to reproduce the problem

Using the default database:

      OrientJdbcConnection conn = (OrientJdbcConnection) DriverManager.getConnection("jdbc:orient:" + dbUrl, info); 

      //create and execute statement 
      String stmtStr = "SELECT FROM V WHERE song_type like ?";


      PreparedStatement stmt = conn.prepareStatement(stmtStr);
      stmt.setString(1, "original");

      ResultSet rs = stmt.executeQuery();

      int type = rs.getMetaData().getColumnType(1);

Important Questions

Runninng Mode

Embedded, using PLOCAL access mode
Embedded, using MEMORY access mode
[ X] Remote

Misc

I have a distributed setup with multiple servers. How many?
I’m using the Enterprise Edition

OrientDB Version

v2.0.x - Please specify last number:
v2.1.x - Please specify last number:
[X ] v2.2.x - Please specify last number: 0

Operating System

Linux
[X ] MacOSX
Windows
Other Unix
Other, name?

Java Version

6
7
[ X] 8

Issue Analytics

State:
Created 7 years ago
Comments:11 (6 by maintainers)

Top GitHub Comments

4reactions

Mzed-mancommented, Nov 21, 2019

Check if you have included the mysql-jdbc-connector or the connector to your database library into your project.

0reactions

robfrankcommented, Sep 12, 2016

No, sorry, is the javadoc from ResutlSet.getMetadata:

 /**
     * Retrieves the  number, types and properties of
     * this <code>ResultSet</code> object's columns.
     *
     * @return the description of this <code>ResultSet</code> object's columns
     * @exception SQLException if a database access error occurs or this method is
     *            called on a closed result set
     */
    ResultSetMetaData getMetaData() throws SQLException;

The problem is that at the JDBC level we don’t have all the info about the documents retrieved from Orient. And even if you work with plain OrientDB API what you get as a query result is a list od ODocuments, nothing more. On 3.0 we are working to overcome this, providing more metadata about the documents set returned by the database.

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