Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/18724#discussion_r132600534
--- Diff: sql/core/src/test/scala/org/apache/spark/sql/jdbc/JDBCSuite.scala
---
@@ -1007,4 +1007,23 @@ class JDBCSuite extends SparkFunSuite
assert(sql("select * from people_view").count() == 3)
}
}
+
+ test("SPARK-21519: option sessionInitStatement, run SQL to initialize
the database session.") {
+ val initSQL1 = "SET @MYTESTVAR 21519"
+ val df1 = spark.read.format("jdbc")
+ .option("url", urlWithUserAndPass)
+ .option("dbtable", "(SELECT NVL(@MYTESTVAR, -1))")
+ .option("sessionInitStatement", initSQL1)
+ .load()
+ assert(df1.collect() === Array(Row(21519)))
+
+ val initSQL2 = "SET SCHEMA DUMMY"
--- End diff --
Sorry, I might not explain it clearly. Is that possible we can have a test
case to send more than one statements in a single session initialization? Now
these two examples have only one statement.
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