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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[FlightSQLJDBC] not implemented exception when fetching TimeStamp from ResultSet","articleBody":"### Describe the bug, including details regarding any error messages, version, and platform.\n\n## Description\n\nWhen a TimeStamp is returned in a Flight SQL JDBC `ResultSet` an exception is throw when accessing the value via `getObject(index)`.  It works using `getObject(columnName)`.  Below as a simple example of how the problem can be reproduced:\n\n```java\ntry (var connection = DriverManager.getConnection(\"jdbc:arrow-flight://localhost:5000;useEncryption=false\");\n             PreparedStatement createStatement = connection.prepareStatement(\"create table if not exists test (ts timestamp, id bigint)\");\n             PreparedStatement insertStatement = connection.prepareStatement(\"insert into test values ('1970-04-01 21:39:50', 2)\");\n             PreparedStatement selectStatement = connection.prepareStatement(\"select ts from test where id = 2\")\n) {\n\n    createStatement.execute();\n    insertStatement.executeUpdate();\n\n    try (var rs = selectStatement.executeQuery()) {\n        while (rs.next()) {\n\n            // Fails with a not implemented exception\n            System.out.println(rs.getObject(1)); \n\n            // works\n            System.out.println(rs.getObject(\"ts\")); \n        }\n    }\n}\n```\n\nHere is the stack trace for the `getObject(index)`\n\n```\nException in thread \"main\" java.lang.RuntimeException: not implemented\n\tat org.apache.arrow.driver.jdbc.shaded.org.apache.calcite.avatica.AvaticaSite.notImplemented(AvaticaSite.java:422)\n\tat org.apache.arrow.driver.jdbc.shaded.org.apache.calcite.avatica.AvaticaSite.get(AvaticaSite.java:381)\n\tat org.apache.arrow.driver.jdbc.shaded.org.apache.calcite.avatica.AvaticaResultSet.getObject(AvaticaResultSet.java:395)\n\tat JDBCParamTest.runDateTimeTimestampExample(JDBCParamTest.java:91)\n\tat JDBCParamTest.main(JDBCParamTest.java:14)\n```\n\n## Version information:\n\n| item | version |\n| ---- | -------- |\n| Java | Zulu 21.0.8 (ARM) |\n| Flight SQL JDBC | 18.3.0 |\n| macOS | 15.6 (Apple Silicon) |","author":{"url":"https://github.com/jeremyosterhoudt","@type":"Person","name":"jeremyosterhoudt"},"datePublished":"2025-08-12T21:27:46.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/818/arrow-java/issues/818"}