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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