[jira] [Created] (CALCITE-3162) Reading Arrays from Calcite using Avatica generates error

["Ralph Gasser (JIRA)" <ji...@apache.org>]

Ralph Gasser created CALCITE-3162:
-------------------------------------

             Summary: Reading Arrays from Calcite using Avatica generates error
                 Key: CALCITE-3162
                 URL: https://issues.apache.org/jira/browse/CALCITE-3162
             Project: Calcite
          Issue Type: Bug
          Components: avatica
    Affects Versions: avatica-1.15.0
         Environment: Tested on OS X 10.14.5, OpenJDK Runtime Environment Zulu11.29+3-CA (build 11.0.2+7-LTS)

Issue occurs with both Apache Calcite 1.19.0 & 1.20.0.
            Reporter: Ralph Gasser


I'm trying to use _Apache Calcite_ as SQL Parser and Query Planner for a custom data store and in addition, I'm using _Apache Avatica_ to expose the entire functionality via JDBC for an arbitrary, potential remote client to use. 

We're working a lot with Array types, since we're using our backend to store high-dimensional vectors. However, it seems that currently, Apache Avatica has troubles handling such arrays.

Take the following test-case that reproduces the problem pretty well.
{code:java}
@Test
    public void test() throws Exception {

        HttpServer server = null;
        try {
            Class.forName("org.apache.calcite.jdbc.Driver");
            server = new HttpServer.Builder<>()
                    .withHandler(new LocalService(new JdbcMeta("jdbc:calcite:", newProperties())),Driver.Serialization.PROTOBUF)
                    .withPort(1234)
                    .build();

            server.start();

            final Connection connection = DriverManager.getConnection("jdbc:avatica:remote:serialization=protobuf;url=http://127.0.0.1:1234");
            final Statement stmt = connection.createStatement();
            final ResultSet resultSet = stmt.executeQuery("select ARRAY[1.0, 1.0, 3.0, 2.0]");
            resultSet.getArray(1);
        } catch (Exception e) {
            System.out.println(e.getMessage());
        } finally {
            if (server != null) {
                server.stop();
            }
        }
    }
{code}
Executing the statement will throw an AvaticaSqlException:
{code:java}
org.apache.calcite.avatica.AvaticaSqlException: Error -1 (00000) : Error while executing SQL "select ARRAY[1.0, 1.0, 3.0, 2.0]": Remote driver error: RuntimeException: java.sql.SQLException: invalid column ordinal: 2 -> SQLException: invalid column ordinal: 2
{code}
The culprit seems to be the _org.apache.calcite.avatica.jdbc.JdbcResultSet_ class. More specifically, the _JdbcResultSet#extractUsingResultSet()_ method.

I am actually testing a potential fix but first I wanted to make sure, that there is nothing wrong with the way I'm using the two components.



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