[DRILL-6809] Handle repeated map in schema inference

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.14.0
• Fix Version/s: 1.15.0
• Labels: ready-to-commit
• Assignee: Paul Rogers
• Reporter: jean-claude
• Reviewer: Arina Ielchiieva
• Created: 23/Oct/18 01:21
• Updated: 02/Nov/18 21:24
• Resolved: 02/Nov/18 21:24

Description

I'm trying to write a test case for a repeated map scenario. However testing framework is unable to infer the schema of the resultset? I'm using the API correctly?
 
Thanks
jc
 
// create a test file
    try (OutputStreamWriter w = new OutputStreamWriter(new FileOutputStream(new File(testDir, "test.json")))) {
      w.write("{\"arrayOfMap\":[

{\"type\": 3, \"data\": 44}

]}\n");
    }
 
// read the test file
    String sql = "select * from `dfs.data`.`test.json`";
    RowSet actual = client.queryBuilder().sql(sql).rowSet();
 
// error outputted
java.lang.NullPointerException: null
        at org.apache.drill.exec.physical.rowSet.model.single.SingleSchemaInference.inferVector(SingleSchemaInference.java:70) ~[drill-java-exec-1.15.0-SNAPSHOT.jar:1.15.0-SNAPSHOT]
        at org.apache.drill.exec.physical.rowSet.model.single.SingleSchemaInference.inferMapSchema(SingleSchemaInference.java:91) ~[drill-java-exec-1.15.0-SNAPSHOT.jar:1.15.0-SNAPSHOT]
        at org.apache.drill.exec.physical.rowSet.model.single.SingleSchemaInference.inferVector(SingleSchemaInference.java:73) ~[drill-java-exec-1.15.0-SNAPSHOT.jar:1.15.0-SNAPSHOT]
        at org.apache.drill.exec.physical.rowSet.model.single.SingleSchemaInference.infer(SingleSchemaInference.java:64) ~[drill-java-exec-1.15.0-SNAPSHOT.jar:1.15.0-SNAPSHOT]
        at org.apache.drill.test.rowSet.DirectRowSet.fromContainer(DirectRowSet.java:77) ~[drill-java-exec-1.15.0-SNAPSHOT-tests.jar:1.15.0-SNAPSHOT]
        at org.apache.drill.test.QueryBuilder.rowSet(QueryBuilder.java:363) ~[drill-java-exec-1.15.0-SNAPSHOT-tests.jar:1.15.0-SNAPSHOT]
        at org.apache.drill.exec.store.msgpack.TestMsgpackRecordReader.testSchemaRepeatedMapWithFieldWithDifferentTypes(TestMsgpackRecordReader.java:245) ~[test-classes/:na]
        at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_181]

Issue Links

• links to: GitHub Pull Request #1513