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https://issues.apache.org/jira/browse/CASSANDRA-2734?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jonathan Ellis updated CASSANDRA-2734:
--------------------------------------
Attachment: 0003-thrift-gen.txt
0002-ant-gen-thrift-java.txt
0001-include-schema-with-resultset.txt
> JDBC driver assumes schema is constant for the duration of the connection
> -------------------------------------------------------------------------
>
> Key: CASSANDRA-2734
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2734
> Project: Cassandra
> Issue Type: Sub-task
> Components: API
> Affects Versions: 0.8.0
> Reporter: Cathy Daw
> Assignee: Jonathan Ellis
> Priority: Minor
> Labels: cql
> Fix For: 1.0
>
> Attachments: 0001-include-schema-with-resultset.txt,
> 0002-ant-gen-thrift-java.txt, 0003-thrift-gen.txt
>
>
> *The following statement fails when used with a Statement or
> PreparedStatement*
> {code}
> res = stmt.executeQuery("SELECT bar FROM users");
> res.next();
> {code}
> *Error Message*
> {code}
> [junit] Testcase: simpleSelect(com.datastax.cql.reproBugTest): Caused
> an ERROR
> [junit] null
> [junit] java.lang.NullPointerException
> [junit] at
> org.apache.cassandra.cql.jdbc.ColumnDecoder.makeKeyColumn(ColumnDecoder.java:136)
> [junit] at
> org.apache.cassandra.cql.jdbc.CResultSet.next(CResultSet.java:388)
> [junit] at
> com.datastax.cql.reproBugTest.simpleSelect(reproBugTest.java:57)
> [junit]
> [junit]
> [junit] Test com.datastax.cql.reproBugTest FAILED
> {code}
> *Here is a quick repro. Showing that res.next() works with other statements
> but not select.*
> _Also notice that ResultSet.getMetaData().getColumnCount() always returns
> zero._
> _I noticed in the existing driver tests similar test cases, so not sure the
> issue._
> *Steps to run script*
> * you will need to drop this in your test directory
> * change the package declaration
> * ant test -Dtest.name=reproBugTest
> {code}
> package com.datastax.cql;
> import java.sql.DriverManager;
> import java.sql.Connection;
> import java.sql.ResultSet;
> import java.sql.SQLException;
> import java.sql.Statement;
> import org.junit.Test;
> public class reproBugTest {
>
> @Test
> public void simpleSelect() throws Exception {
> Connection connection = null;
> ResultSet res;
> Statement stmt;
> int colCount = 0;
>
> try {
> Class.forName("org.apache.cassandra.cql.jdbc.CassandraDriver");
>
> // Check create keyspace
> connection =
> DriverManager.getConnection("jdbc:cassandra:root/root@127.0.0.1:9160/default");
>
> stmt = connection.createStatement();
> try {
> System.out.println("Running DROP KS Statement");
> res = stmt.executeQuery("DROP KEYSPACE ks1");
> res.next();
>
> System.out.println("Running CREATE KS Statement");
> res = stmt.executeQuery("CREATE KEYSPACE ks1 with
> strategy_class = 'org.apache.cassandra.locator.SimpleStrategy' and
> strategy_options:replication_factor=1");
> res.next();
> } catch (SQLException e) {
> if (e.getMessage().startsWith("Keyspace does not exist"))
> {
> res = stmt.executeQuery("CREATE KEYSPACE ks1 with
> strategy_class = 'org.apache.cassandra.locator.SimpleStrategy' and
> strategy_options:replication_factor=1");
> }
> }
> connection.close();
>
> // Run Test
> connection =
> DriverManager.getConnection("jdbc:cassandra:root/root@127.0.0.1:9160/ks1");
>
> stmt = connection.createStatement();
> System.out.print("Running CREATE CF Statement");
> res = stmt.executeQuery("CREATE COLUMNFAMILY users (KEY varchar
> PRIMARY KEY, password varchar, gender varchar, session_token varchar, state
> varchar, birth_year bigint)");
> colCount = res.getMetaData().getColumnCount();
> System.out.println(" -- Column Count: " + colCount);
> res.next();
>
> System.out.print("Running INSERT Statement");
> res = stmt.executeQuery("INSERT INTO users (KEY, password) VALUES
> ('user1', 'ch@nge')");
> colCount = res.getMetaData().getColumnCount();
> System.out.println(" -- Column Count: " + colCount);
> res.next();
>
> System.out.print("Running SELECT Statement");
> res = stmt.executeQuery("SELECT bar FROM users");
> colCount = res.getMetaData().getColumnCount();
> System.out.println(" -- Column Count: " + colCount);
> res.getRow();
> res.next();
>
> connection.close();
> } catch (SQLException e) {
> e.printStackTrace();
> }
> }
>
> }
> {code}
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