Github user srowen commented on a diff in the pull request: https://github.com/apache/spark/pull/9733#discussion_r45052370 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala --- @@ -120,7 +120,7 @@ private[sql] object JDBCRDD extends Logging { val dialect = JdbcDialects.get(url) val conn: Connection = getConnector(properties.getProperty("driver"), url, properties)() try { - val rs = conn.prepareStatement(s"SELECT * FROM $table WHERE 1=0").executeQuery() + val rs = conn.createStatement.executeQuery(s"SELECT * FROM $table WHERE 1=0") --- End diff -- Ah hang on a sec, I see you've changed some non-DDL statements in this version of the PR. The change is just about avoiding `PreparedStatement` for DDL right? My earlier comments were about closing resources for a bunch of queries including non-DDL. But if you're only addressing DDL, then your last PR was fine (before it was corrupted).
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